]> git.ipfire.org Git - thirdparty/gcc.git/blobdiff - gcc/configure.ac
Correct a function pre/postcondition [PR102403].
[thirdparty/gcc.git] / gcc / configure.ac
index 89b9981e8725a720d9357c0ec8bc8c037a122ed6..fadd34dbbb6325bc8bd87831f812bed1ab92fa46 100644 (file)
@@ -1,7 +1,7 @@
 # configure.ac for GCC
 # Process this file with autoconf to generate a configuration script.
 
-# Copyright (C) 1997-2020 Free Software Foundation, Inc.
+# Copyright (C) 1997-2021 Free Software Foundation, Inc.
 
 #This file is part of GCC.
 
@@ -228,6 +228,48 @@ elif test "${with_sysroot+set}" = set; then
   fi
 fi
 
+# Configuration for an alternate set of C++ headers.
+gcc_gxx_libcxx_include_dir=
+# Specify the alternate g++ header file directory
+AC_ARG_WITH(gxx-libcxx-include-dir,
+[AS_HELP_STRING([--with-gxx-libcxx-include-dir=DIR],
+                [specifies directory to find libc++ header files])],
+[case "${withval}" in
+yes)   AC_MSG_ERROR(bad value ${withval} given for libc++ include directory) ;;
+no)    ;;
+*)     gcc_gxx_libcxx_include_dir=$with_gxx_libcxx_include_dir ;;
+esac])
+
+# If both --with-sysroot and --with-gxx-libcxx-include-dir are passed, we
+# check to see if the latter starts with the former and, upon success, compute
+# gcc_gxx_libcxx_include_dir as relative to the sysroot.
+gcc_gxx_libcxx_include_dir_add_sysroot=0
+
+if test x${gcc_gxx_libcxx_include_dir} != x; then
+  AC_DEFINE(ENABLE_STDLIB_OPTION, 1,
+            [Define if the -stdlib= option should be enabled.])
+else
+  AC_DEFINE(ENABLE_STDLIB_OPTION, 0)
+fi
+# ??? This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
+if test x${gcc_gxx_libcxx_include_dir} = x; then
+  if test x${enable_version_specific_runtime_libs} = xyes; then
+    gcc_gxx_libcxx_include_dir='${libsubdir}/libc++_include/c++/v1'
+  else
+    libcxx_incdir='libc++_include/c++/$(version)/v1'
+    if test x$host != x$target; then
+       libcxx_incdir="$target_alias/$libcxx_incdir"
+    fi
+    gcc_gxx_libcxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libcxx_incdir"
+  fi
+elif test "${with_sysroot+set}" = set; then
+  gcc_gxx_libcxx_without_sysroot=`expr "${gcc_gxx_libcxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
+  if test "${gcc_gxx_libcxx_without_sysroot}"; then
+    gcc_gxx_libcxx_include_dir="${gcc_gxx_libcxx_without_sysroot}"
+    gcc_gxx_libcxx_include_dir_add_sysroot=1
+  fi
+fi
+
 AC_ARG_WITH(cpp_install_dir,
 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
                 [install the user visible C preprocessor in DIR
@@ -274,8 +316,14 @@ gnu_ld_flag="$with_gnu_ld",
 gnu_ld_flag=no)
 
 case $target in
-    *darwin*) ld64_flag=yes;; # Darwin can only use a ld64-compatible linker.
-    *) ld64_flag=no;;
+    *darwin*)
+       ld64_flag=yes # Darwin can only use a ld64-compatible linker.
+       dsymutil_flag=yes # Darwin uses dsymutil to link debug.
+       ;;
+    *)
+       ld64_flag=no
+       dsymutil_flag=no
+       ;;
 esac
 
 # With pre-defined ld
@@ -311,6 +359,31 @@ AC_ARG_WITH(demangler-in-ld,
 demangler_in_ld="$with_demangler_in_ld",
 demangler_in_ld=yes)
 
+# Allow the user to specify a dsymutil executable (used on Darwin only, so far)
+AC_ARG_WITH(dsymutil,
+[AS_HELP_STRING([--with-dsymutil], [arrange to use the specified dsymutil (full pathname)])],
+DEFAULT_DSYMUTIL="$with_dsymutil")
+
+dsymutil_vers=
+if test x"${DEFAULT_DSYMUTIL+set}" = x"set"; then
+  if test ! -x "$DEFAULT_DSYMUTIL"; then
+    AC_MSG_ERROR([cannot execute: $DEFAULT_DSYMUTIL: check --with-dsymutil or env. var. DEFAULT_DSYMUTIL])
+  else
+    if dsymutil_vers=`$DEFAULT_DSYMUTIL -v /dev/null 2>&1`; then
+      dsymutil_flag=yes
+    fi
+  fi
+  AC_DEFINE_UNQUOTED(DEFAULT_DSYMUTIL,"$DEFAULT_DSYMUTIL",
+       [Define to enable the use of a default debug linker.])
+fi
+
+AC_MSG_CHECKING([whether a default dsymutil was specified])
+if test x"${DEFAULT_DSYMUTIL+set}" = x"set"; then
+  AC_MSG_RESULT([yes ($DEFAULT_DSYMUTIL)])
+else
+  AC_MSG_RESULT(no)
+fi
+
 # ----------------------
 # Find default assembler
 # ----------------------
@@ -772,13 +845,6 @@ fi
 # Miscenalleous configure options
 # -------------------------------
 
-# With stabs
-AC_ARG_WITH(stabs,
-[AS_HELP_STRING([--with-stabs],
-               [arrange to use stabs instead of host debug format])],
-stabs="$with_stabs",
-stabs=no)
-
 # Determine whether or not multilibs are enabled.
 AC_ARG_ENABLE(multilib,
 [AS_HELP_STRING([--enable-multilib],
@@ -1097,6 +1163,11 @@ else
     [Define this to enable support for offloading.])
 fi
 
+if test "x$enable_offload_defaulted" = xyes; then
+  AC_DEFINE(OFFLOAD_DEFAULTED, 1,
+    [Define to 1 to if -foffload is defaulted])
+fi
+
 AC_ARG_WITH(multilib-list,
 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
 :,
@@ -1210,7 +1281,7 @@ AC_HEADER_SYS_WAIT
 AC_HEADER_TIOCGWINSZ
 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
                 fcntl.h ftw.h unistd.h sys/file.h sys/time.h sys/mman.h \
-                sys/resource.h sys/param.h sys/times.h sys/stat.h \
+                sys/resource.h sys/param.h sys/times.h sys/stat.h sys/locking.h \
                 direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 
 # Check for thread headers.
@@ -1291,6 +1362,15 @@ EXTRA_GCC_LIBS="$LIBS"
 LIBS="$save_LIBS"
 AC_SUBST(EXTRA_GCC_LIBS)
 
+# Solaris needs libsocket and libnsl for socket functions before 11.4.
+# C++ needs those for libcody.
+save_LIBS="$LIBS"
+LIBS=
+AX_LIB_SOCKET_NSL
+NETLIBS="$LIBS"
+LIBS="$save_LIBS"
+AC_SUBST(NETLIBS)
+
 # Some systems put ldexp and frexp in libm instead of libc; assume
 # they're both in the same place.  jcf-dump needs them.
 save_LIBS="$LIBS"
@@ -1655,6 +1735,19 @@ if test $ac_cv_af_inet6 = yes; then
   [Define if AF_INET6 supported.])
 fi
 
+# Check if _LK_LOCK is supported by _locking
+AC_CACHE_CHECK(for _LK_LOCK, ac_cv_lk_lock, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <io.h>
+#include <sys/locking.h>]], [[
+  int fd;
+  return _locking (fd, _LK_LOCK, 0);]])],
+[ac_cv_lk_lock=yes],[ac_cv_lk_lock=no])])
+if test $ac_cv_lk_lock = yes; then
+  AC_DEFINE(HOST_HAS_LK_LOCK, 1,
+  [Define if _LK_LOC supported by _locking.])
+fi
+
 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
 CFLAGS="$saved_CFLAGS"
 CXXFLAGS="$saved_CXXFLAGS"
@@ -2373,23 +2466,13 @@ BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
 BUILD_LDFLAGS='$(LDFLAGS)'     AC_SUBST(BUILD_LDFLAGS)
 STMP_FIXINC=stmp-fixinc                AC_SUBST(STMP_FIXINC)
 
-BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS)' AC_SUBST(BUILD_NO_PIE_CFLAGS)
-BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG)' AC_SUBST(BUILD_NO_PIE_FLAG)
-
 # And these apply if build != host, or we are generating coverage data
 if test x$build != x$host || test "x$coverage_flags" != x
 then
-    BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
-    BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
+    BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS-$@) $(CFLAGS_FOR_BUILD)'
+    BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS-$@) $(CXXFLAGS_FOR_BUILD)'
     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
-
-    NO_PIE_CFLAGS_FOR_BUILD=${NO_PIE_CFLAGS_FOR_BUILD-${NO_PIE_CFLAGS}}
-    NO_PIE_FLAG_FOR_BUILD=${NO_PIE_FLAG_FOR_BUILD-${NO_PIE_FLAG}}
-    BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS_FOR_BUILD)'
-    BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG_FOR_BUILD)'
 fi
-AC_SUBST(NO_PIE_CFLAGS_FOR_BUILD)
-AC_SUBST(NO_PIE_FLAG_FOR_BUILD)
 
 # Expand extra_headers to include complete path.
 # This substitutes for lots of t-* files.
@@ -2456,8 +2539,6 @@ AC_SUBST(enable_fast_install)
 # If build != host, and we aren't building gas in-tree, we identify a
 # build->target assembler and hope that it will have the same features
 # as the host->target assembler we'll be using.
-gcc_cv_gas_major_version=
-gcc_cv_gas_minor_version=
 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
 
 m4_pattern_allow([AS_FOR_TARGET])dnl
@@ -2484,26 +2565,6 @@ case "$ORIGINAL_AS_FOR_TARGET" in
   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
 esac 
 
-AC_MSG_CHECKING(what assembler to use)
-if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
-  # Single tree build which includes gas.  We want to prefer it
-  # over whatever linker top-level may have detected, since
-  # we'll use what we're building after installation anyway.
-  AC_MSG_RESULT(newly built gas)
-  in_tree_gas=yes
-  _gcc_COMPUTE_GAS_VERSION
-  in_tree_gas_is_elf=no
-  if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
-     || (grep 'obj_format = multi' ../gas/Makefile \
-         && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
-  then
-    in_tree_gas_is_elf=yes
-  fi
-else
-  AC_MSG_RESULT($gcc_cv_as)
-  in_tree_gas=no
-fi
-
 default_ld=
 AC_ARG_ENABLE(ld,
 [[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
@@ -2783,29 +2844,46 @@ else
        AC_MSG_RESULT($gcc_cv_otool)
 fi
 
+# Figure out the dsymutil we will use.
+AS_VAR_SET_IF(gcc_cv_dsymutil,, [
+if test -x "$DEFAULT_DSYMUTIL"; then
+    gcc_cv_dsymutil="$DEFAULT_DSYMUTIL"
+elif test -x dsymutil$build_exeext; then
+    gcc_cv_dsymutil=./dsymutil$build_exeext
+elif ( set dummy $DSYMUTIL_FOR_TARGET; test -x $[2] ); then
+    gcc_cv_dsymutil=$DSYMUTIL_FOR_TARGET
+elif ( set dummy $DSYMUTIL; test -x $[2] ); then
+    gcc_cv_dsymutil=$DSYMUTIL
+else
+    AC_PATH_PROG(gcc_cv_dsymutil, $DSYMUTIL_FOR_TARGET)
+fi])
+
+ORIGINAL_DSYMUTIL_FOR_TARGET=$gcc_cv_dsymutil
+AC_SUBST(ORIGINAL_DSYMUTIL_FOR_TARGET)
+case "$ORIGINAL_DSYMUTIL_FOR_TARGET" in
+  ./dsymutil | ./dsymutil$build_exeext) ;;
+  *) AC_CONFIG_FILES(dsymutil:exec-tool.in, [chmod +x dsymutil]) ;;
+esac 
+
 # Figure out what assembler alignment features are present.
-gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
- [2,6,0],,
+gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,,
 [.balign 4
 .p2align 2],,
 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
   [Define if your assembler supports .balign and .p2align.])])
 
-gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
- [2,8,0],,
+gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,,
  [.p2align 4,,7],,
 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
   [Define if your assembler supports specifying the maximum number
    of bytes to skip when using the GAS .p2align command.])])
 
-gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
- [2,8,0],,
+gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,,
  [.literal16],,
 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
   [Define if your assembler supports .literal16.])])
 
-gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
- [elf,2,9,0],,
+gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,,
  [conftest_label1: .word 0
 .subsection -1
 conftest_label2: .word 0
@@ -2823,18 +2901,15 @@ conftest_label2: .word 0
   [Define if your assembler supports .subsection and .subsection -1 starts
    emitting at the beginning of your section.])])
 
-gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
- [2,2,0],,
+gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,,
  [     .weak foobar],,
 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
 
-gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
- [2,17,0],,
+gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,,
  [     .weakref foobar, barfnot],,
 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
 
-gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
- [2,15,91],,
+gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,,
  [     .SPACE $TEXT$
        .NSUBSPA $CODE$,COMDAT],,
 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
@@ -2855,8 +2930,7 @@ case "${target}" in
 foobar:'
     ;;
 esac
-gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
- [elf,2,13,0],, [$conftest_s])
+gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,, [$conftest_s])
 case "${target}" in
   *-*-darwin*)
     # Darwin as has some visibility support, though with a different syntax.
@@ -3074,8 +3148,7 @@ gcc_AC_INITFINI_ARRAY
 # Check if we have .[us]leb128, and support symbol arithmetic with it.
 # Older versions of GAS and some non-GNU assemblers, have a bugs handling
 # these directives, even when they appear to accept them.
-gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
- [elf,2,11,0],,
+gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,,
 [      .data
        .uleb128 L2 - L1
 L1:
@@ -3113,8 +3186,7 @@ gcc_fn_eh_frame_ro () {
 }
 
 # Check if we have assembler support for unwind directives.
-gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
-  ,,
+gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,,
 [      .text
        .cfi_startproc
        .cfi_offset 0, 0
@@ -3169,8 +3241,7 @@ gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
     ;;
 esac])
 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
-gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
-  ,,
+gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,,
 [      .text
        .cfi_startproc
        .cfi_adjust_cfa_offset 64
@@ -3195,7 +3266,7 @@ AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
 
 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
 gcc_GAS_CHECK_FEATURE([cfi personality directive],
-  gcc_cv_as_cfi_personality_directive, ,,
+  gcc_cv_as_cfi_personality_directive,,
 [      .text
        .cfi_startproc
        .cfi_personality 0, symbol
@@ -3205,7 +3276,7 @@ AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
   [Define 0/1 if your assembler supports .cfi_personality.])
 
 gcc_GAS_CHECK_FEATURE([cfi sections directive],
-  gcc_cv_as_cfi_sections_directive, ,,
+  gcc_cv_as_cfi_sections_directive,,
 [      .text
        .cfi_sections .debug_frame, .eh_frame
        .cfi_startproc
@@ -3233,8 +3304,7 @@ AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
 
 # GAS versions up to and including 2.11.0 may mis-optimize
 # .eh_frame data.
-gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
-  [elf,2,12,0],,
+gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,,
 [      .text
 .LFB1:
        .4byte  0
@@ -3305,7 +3375,7 @@ fi
 # Test if the assembler supports the section flag 'e' or #exclude for
 # specifying an excluded section.
 gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_e,
- [2,22,51], [--fatal-warnings],
+ [--fatal-warnings],
  [.section foo1,"e"
   .byte 0,0,0,0])
 if test $gcc_cv_as_section_exclude_e = no; then
@@ -3322,7 +3392,7 @@ if test $gcc_cv_as_section_exclude_e = no; then
       esac
       ;;
     esac
-  gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_hash,,,
+  gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_hash,,
     [$conftest_s
      .byte 0,0,0,0])
 fi
@@ -3341,7 +3411,7 @@ case "${target}" in
     ;;
   *)
     gcc_GAS_CHECK_FEATURE([section 'R' flag], gcc_cv_as_shf_gnu_retain,
-      [elf,2,36,0], [--fatal-warnings],
+      [--fatal-warnings],
       [.section .foo,"awR",%progbits
 .byte 0])
     ;;
@@ -3361,7 +3431,7 @@ case "${target}" in
     ;;
   *)
     gcc_GAS_CHECK_FEATURE([section 'o' flag], gcc_cv_as_section_link_order,
-      [2,35,0], [--fatal-warnings],
+      [--fatal-warnings],
       [.section .foo,"a"
 .byte 0
 .section __patchable_function_entries,"awo",%progbits,.foo
@@ -3373,11 +3443,11 @@ AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_LINK_ORDER,
   [Define 0/1 if your assembler supports 'o' flag in .section directive.])
 
 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
- [elf,2,12,0], [--fatal-warnings],
+ [--fatal-warnings],
  [.section .rodata.str, "aMS", @progbits, 1])
 if test $gcc_cv_as_shf_merge = no; then
   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
-    [elf,2,12,0], [--fatal-warnings],
+    [--fatal-warnings],
     [.section .rodata.str, "aMS", %progbits, 1])
 fi
 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
@@ -3399,14 +3469,14 @@ AC_DEFINE_UNQUOTED(HAVE_LD_ALIGNED_SHF_MERGE,
   [`if test $gcc_cv_ld_aligned_shf_merge = yes; then echo 1; else echo 0; fi`],
 [Define 0/1 if your linker supports the SHF_MERGE flag with section alignment > 1.])
 
-gcc_GAS_CHECK_FEATURE([stabs directive], gcc_cv_as_stabs_directive, ,,
+gcc_GAS_CHECK_FEATURE([stabs directive], gcc_cv_as_stabs_directive,,
 [.stabs "gcc2_compiled.",60,0,0,0],,
 [AC_DEFINE(HAVE_AS_STABS_DIRECTIVE, 1,
   [Define if your assembler supports .stabs.])])
 
 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
  gcc_cv_as_comdat_group,
- [elf,2,16,0], [--fatal-warnings],
+ [--fatal-warnings],
  [.section .text,"axG",@progbits,.foo,comdat])
 if test $gcc_cv_as_comdat_group = yes; then
   gcc_cv_as_comdat_group_percent=no
@@ -3414,7 +3484,7 @@ if test $gcc_cv_as_comdat_group = yes; then
 else
  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
    gcc_cv_as_comdat_group_percent,
-   [elf,2,16,0], [--fatal-warnings],
+   [--fatal-warnings],
    [.section .text,"axG",%progbits,.foo,comdat])
  if test $gcc_cv_as_comdat_group_percent = yes; then
    gcc_cv_as_comdat_group_group=no
@@ -3442,7 +3512,7 @@ else
        esac
        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
          gcc_cv_as_comdat_group_group,
-         ,, [$conftest_s])
+         , [$conftest_s])
        ;;
    esac
    if test -z "${gcc_cv_as_comdat_group_group+set}"; then
@@ -3537,8 +3607,7 @@ case "${target}" in
 esac
 
 gcc_GAS_CHECK_FEATURE([line table is_stmt support],
- gcc_cv_as_is_stmt,
- [2,16,92],,
+ gcc_cv_as_is_stmt,,
 [      .text
        .file 1 "conf.c"
        .loc 1 1 0 is_stmt 1],,
@@ -3546,8 +3615,7 @@ gcc_GAS_CHECK_FEATURE([line table is_stmt support],
   [Define if your assembler supports the .loc is_stmt sub-directive.])])
 
 gcc_GAS_CHECK_FEATURE([line table discriminator support],
- gcc_cv_as_discriminator,
- [2,19,51],,
+ gcc_cv_as_discriminator,,
 [      .text
        .file 1 "conf.c"
        .loc 1 1 0 discriminator 1],,
@@ -3568,8 +3636,6 @@ esac], [])
 
 # Thread-local storage - the check is heavily parameterized.
 conftest_s=
-tls_first_major=
-tls_first_minor=
 tls_as_opt=
 case "$target" in
 changequote(,)dnl
@@ -3592,15 +3658,11 @@ foo:    .long   25
        ldah    $2,foo($29)                     !tprelhi
        lda     $3,foo($2)                      !tprello
        lda     $4,foo($29)                     !tprel'
-       tls_first_major=2
-       tls_first_minor=13
        tls_as_opt=--fatal-warnings
        ;;
   arc*-*-*)
     conftest_s='
        add_s r0,r0, @foo@tpoff'
-       tls_first_major=2
-       tls_first_minor=23
        ;;
   cris-*-*|crisv32-*-*)
     conftest_s='
@@ -3609,8 +3671,6 @@ x:      .long   25
         .text
        move.d x:IE,$r10
        nop'
-       tls_first_major=2
-       tls_first_minor=20
        tls_as_opt=--fatal-warnings
        ;;
   frv*-*-*)
@@ -3619,8 +3679,6 @@ x:      .long   25
 x:      .long   25
         .text
         call    #gettlsoff(x)'
-       tls_first_major=2
-       tls_first_minor=14
        ;;
   hppa*-*-linux*)
     conftest_s='
@@ -3647,8 +3705,6 @@ foo:      .long   25
        mfctl %cr27,%t1                 
        addil LR%foo-$tls_leoff$,%t1
        ldo RR%foo-$tls_leoff$(%r1),%t2'
-       tls_first_major=2
-       tls_first_minor=15
        tls_as_opt=--fatal-warnings
        ;;
   arm*-*-*)
@@ -3661,8 +3717,6 @@ foo:      .long   25
 .word foo(tlsgd)
 .word foo(tlsldm)
 .word foo(tlsldo)'
-       tls_first_major=2
-       tls_first_minor=17
        ;;
   i[34567]86-*-* | x86_64-*-*)
     case "$target" in
@@ -3676,8 +3730,6 @@ foo:      .long   25
     if test x$on_solaris = xyes && test x$gas_flag = xno; then
       conftest_s='
        .section .tdata,"awt",@progbits'
-      tls_first_major=0
-      tls_first_minor=0
       tls_section_flag=t
 changequote([,])dnl
       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
@@ -3686,8 +3738,6 @@ changequote(,)dnl
     else
       conftest_s='
        .section ".tdata","awT",@progbits'
-      tls_first_major=2
-      tls_first_minor=14
       tls_section_flag=T
       tls_as_opt="--fatal-warnings"
     fi
@@ -3746,8 +3796,6 @@ foo:      data8   25
        addl    r20 = @tprel(foo#), gp
        adds    r22 = @tprel(foo#), r13
        movl    r24 = @tprel(foo#)'
-       tls_first_major=2
-       tls_first_minor=13
        tls_as_opt=--fatal-warnings
        ;;
   microblaze*-*-*)
@@ -3758,8 +3806,6 @@ x:
        .text
        addik r5,r20,x@TLSGD
        addik r5,r20,x@TLSLDM'
-       tls_first_major=2
-       tls_first_minor=20
        tls_as_opt='--fatal-warnings'
        ;;
   mips*-*-*)
@@ -3775,8 +3821,6 @@ x:
        lw $4, %gottprel(x)($28)
        lui $4, %tprel_hi(x)
        addiu $4, $4, %tprel_lo(x)'
-       tls_first_major=2
-       tls_first_minor=16
        tls_as_opt='-32 --fatal-warnings'
        ;;
   m68k-*-*)
@@ -3791,15 +3835,11 @@ foo:
        move.l x@TLSLDO(%a5),%a0
        move.l x@TLSIE(%a5),%a0
        move.l x@TLSLE(%a5),%a0'
-       tls_first_major=2
-       tls_first_minor=19
        tls_as_opt='--fatal-warnings'
        ;;
   nios2-*-*)
       conftest_s='
        .section ".tdata","awT",@progbits'
-       tls_first_major=2
-       tls_first_minor=23
        tls_as_opt="--fatal-warnings"
        ;;
   aarch64*-*-*)
@@ -3811,8 +3851,6 @@ foo:      .long   25
        add   x0, x0, #:tlsgd_lo12:x
         bl    __tls_get_addr
        nop'
-       tls_first_major=2
-       tls_first_minor=20
        tls_as_opt='--fatal-warnings'
        ;;
   or1k*-*-*)
@@ -3823,8 +3861,6 @@ foo:      .long   25
        l.movhi r3, tpoffha(foo)
        l.add   r3, r3, r10
        l.lwz   r4, tpofflo(foo)(r3)'
-    tls_first_major=2
-    tls_first_minor=30
     tls_as_opt=--fatal-warnings
     ;;
   powerpc-ibm-aix*)
@@ -3842,8 +3878,6 @@ LC..1:
        .csect a[TL],4
 a:
        .space 4'
-       tls_first_major=0
-       tls_first_minor=0
        ;;
   powerpc64*-*-*)
     conftest_s='
@@ -3875,8 +3909,6 @@ x3:       .space 8
        add 9,9,3
        bl .__tls_get_addr
        nop'
-       tls_first_major=2
-       tls_first_minor=14
        tls_as_opt="-a64 --fatal-warnings"
        ;;
   powerpc*-*-*)
@@ -3901,8 +3933,6 @@ x3:       .space 4
        addi 9,2,x1@tprel
        addis 9,2,x2@tprel@ha
        addi 9,9,x2@tprel@l'
-       tls_first_major=2
-       tls_first_minor=14
        tls_as_opt="-a32 --fatal-warnings"
        ;;
   riscv*-*-*)
@@ -3912,8 +3942,6 @@ x:        .word 2
        .text
        la.tls.gd a0,x
         call __tls_get_addr'
-       tls_first_major=2
-       tls_first_minor=21
        tls_as_opt='--fatal-warnings'
        ;;
   s390-*-*)
@@ -3931,8 +3959,6 @@ foo:      .long   25
        l       %r1,0(%r1):tls_load:foo
        bas     %r14,0(%r1,%r13):tls_gdcall:foo
        bas     %r14,0(%r1,%r13):tls_ldcall:foo'
-       tls_first_major=2
-       tls_first_minor=14
        tls_as_opt="-m31 --fatal-warnings"
        ;;
   s390x-*-*)
@@ -3949,8 +3975,6 @@ foo:      .long   25
        larl    %r1,foo@INDNTPOFF
        brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
        brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
-       tls_first_major=2
-       tls_first_minor=14
        tls_as_opt="-m64 -Aesame --fatal-warnings"
        ;;
   sh-*-* | sh[123456789lbe]*-*-*)
@@ -3963,8 +3987,6 @@ foo:      .long   25
        .long   foo@DTPOFF
        .long   foo@GOTTPOFF
        .long   foo@TPOFF'
-       tls_first_major=2
-       tls_first_minor=13
        tls_as_opt=--fatal-warnings
        ;;
   sparc*-*-*)
@@ -3979,13 +4001,9 @@ foo:     .long   25
     if test x$on_solaris = xyes && test x$gas_flag = xno; then
       conftest_s='
        .section ".tdata",#alloc,#write,#tls'
-       tls_first_major=0
-       tls_first_minor=0
     else
       conftest_s='
        .section ".tdata","awT",@progbits'
-       tls_first_major=2
-       tls_first_minor=14
        tls_as_opt="-32 --fatal-warnings"
     fi
     conftest_s="$conftest_s
@@ -4022,8 +4040,6 @@ foo:      .long   25
        addli   r0, zero, tls_ie(foo)
        auli    r0, r0, tls_ie_ha16(foo)
        addli   r0, r0, tls_ie_lo16(foo)'
-       tls_first_major=2
-       tls_first_minor=22
        tls_as_opt="--fatal-warnings"
        ;;
   tilegx*-*-*)
@@ -4037,8 +4053,6 @@ foo:      .long   25
        jal        __tls_get_addr
        shl16insli r0, zero, hw1_last_tls_ie(foo)
        shl16insli r0, r0,   hw0_tls_ie(foo)'
-       tls_first_major=2
-       tls_first_minor=22
        tls_as_opt="--fatal-warnings"
        ;;
   xtensa*-*-*)
@@ -4049,8 +4063,6 @@ foo:      .long   25
        movi    a8, foo@TLSFUNC
        movi    a10, foo@TLSARG
        callx8.tls a8, foo@TLSCALL'
-       tls_first_major=2
-       tls_first_minor=19
        ;;
 changequote([,])dnl
 esac
@@ -4059,11 +4071,11 @@ if test "x$enable_tls" = xno ; then
   : # TLS explicitly disabled.
 elif test "x$enable_tls" = xyes ; then
   set_have_as_tls=yes # TLS explicitly enabled.
-elif test -z "$tls_first_major"; then
+elif test -z "$conftest_s"; then
   : # If we don't have a check, assume no support.
 else
   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
-  [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
+  [$tls_as_opt], [$conftest_s],,
   [set_have_as_tls=yes])
 fi
 if test $set_have_as_tls = yes ; then
@@ -4243,7 +4255,7 @@ AC_MSG_RESULT($gcc_cv_lto_plugin)
 case "$target_os" in
   darwin*)
     gcc_GAS_CHECK_FEATURE([-mmacosx-version-min option],
-      gcc_cv_as_mmacosx_version_min,,
+      gcc_cv_as_mmacosx_version_min,
       [-mmacosx-version-min=10.1], [.text],,
       [AC_DEFINE(HAVE_AS_MMACOSX_VERSION_MIN_OPTION, 1,
        [Define if your Mac OS X assembler supports the -mmacos-version-min option.])])
@@ -4254,7 +4266,7 @@ esac
 
 case "$target" in
   aarch64*-*-*)
-    gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
+    gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,
                           [-mabi=lp64], [.text],,,)
     if test x$gcc_cv_as_aarch64_mabi = xyes; then
       AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
@@ -4281,7 +4293,7 @@ case "$target" in
       fi
     fi
     # Check if we have binutils support for relocations types needed by -fpic
-    gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,,
+    gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,
     [
        .text
        ldr     x0, [[x2, #:gotpage_lo15:globalsym]]
@@ -4361,7 +4373,7 @@ AS_HELP_STRING([--disable-fix-cortex-a53-843419],
   # All TARGET_ABI_OSF targets.
   alpha*-*-linux* | alpha*-*-*bsd*)
     gcc_GAS_CHECK_FEATURE([explicit relocation support],
-       gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
+       gcc_cv_as_alpha_explicit_relocs,,
 [      .set nomacro
        .text
        extbl   $3, $2, $3      !lituse_bytoff!1
@@ -4378,7 +4390,7 @@ AS_HELP_STRING([--disable-fix-cortex-a53-843419],
     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
   [Define if your assembler supports explicit relocations.])])
     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
-       gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
+       gcc_cv_as_alpha_jsrdirect_relocs,,
 [      .set nomacro
        .text
        ldq     $27, a($29)     !literal!1
@@ -4388,18 +4400,18 @@ AS_HELP_STRING([--disable-fix-cortex-a53-843419],
     ;;
 
   avr-*-*)
-    gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,,
+    gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,
       [--mlink-relax], [.text],,
       [AC_DEFINE(HAVE_AS_AVR_MLINK_RELAX_OPTION, 1,
                [Define if your avr assembler supports --mlink-relax option.])])
 
-    gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,,
+    gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,
       [-mrmw], [.text],,
       [AC_DEFINE(HAVE_AS_AVR_MRMW_OPTION, 1,
                [Define if your avr assembler supports -mrmw option.])])
 
     gcc_GAS_CHECK_FEATURE([__gcc_isr pseudo instruction],
-      gcc_cv_as_avr_mgccisr,,
+      gcc_cv_as_avr_mgccisr,
       [-mgcc-isr], [.text
                    __gcc_isr 1
                    __gcc_isr 2
@@ -4447,20 +4459,20 @@ EOF
 
   cris-*-*)
     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
-      gcc_cv_as_cris_no_mul_bug,[2,15,91],
+      gcc_cv_as_cris_no_mul_bug,
       [-no-mul-bug-abort], [.text],,
       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
                [Define if your assembler supports the -no-mul-bug-abort option.])])
     ;;
 
   sparc*-*-*)
-    gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
+    gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,
       [-relax], [.text],,
       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
                [Define if your assembler supports -relax option.])])
 
     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
-      gcc_cv_as_sparc_gotdata_op,,
+      gcc_cv_as_sparc_gotdata_op,
       [-K PIC],
 [.text
 .align 4
@@ -4486,7 +4498,7 @@ bar:
                [Define if your assembler and linker support GOTDATA_OP relocs.])])
 
     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
-      gcc_cv_as_sparc_ua_pcrel,,
+      gcc_cv_as_sparc_ua_pcrel,
       [-K PIC],
 [.text
 foo:
@@ -4504,7 +4516,7 @@ foo:
                [Define if your assembler and linker support unaligned PC relative relocs.])
 
       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
-       gcc_cv_as_sparc_ua_pcrel_hidden,,
+       gcc_cv_as_sparc_ua_pcrel_hidden,
        [-K PIC],
 [.data
 .align 4
@@ -4532,7 +4544,7 @@ foo:
     ]) # unaligned pcrel relocs
 
     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
-      gcc_cv_as_sparc_offsetable_lo10,,
+      gcc_cv_as_sparc_offsetable_lo10,
       [-xarch=v9],
 [.text
        or %g1, %lo(ab) + 12, %g1
@@ -4546,7 +4558,7 @@ foo:
                 [Define if your assembler supports offsetable %lo().])])
 
     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
-      gcc_cv_as_sparc_fmaf,,
+      gcc_cv_as_sparc_fmaf,
       [-xarch=v9d],
       [.text
        .register %g2, #scratch
@@ -4560,7 +4572,7 @@ foo:
                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
 
     gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
-      gcc_cv_as_sparc_sparc4,,
+      gcc_cv_as_sparc_sparc4,
       [-xarch=sparc4],
       [.text
        .register %g2, #scratch
@@ -4578,7 +4590,7 @@ foo:
                 [Define if your assembler supports SPARC4 instructions.])])
 
     gcc_GAS_CHECK_FEATURE([SPARC5 and VIS 4.0 instructions],
-      gcc_cv_as_sparc_sparc5,,
+      gcc_cv_as_sparc_sparc5,
       [-xarch=sparc5],
       [.text
        .register %g2, #scratch
@@ -4590,7 +4602,7 @@ foo:
                 [Define if your assembler supports SPARC5 and VIS 4.0 instructions.])])
 
     gcc_GAS_CHECK_FEATURE([SPARC6 instructions],
-      gcc_cv_as_sparc_sparc6,,
+      gcc_cv_as_sparc_sparc6,
       [-xarch=sparc6],
       [.text
        .register %g2, #scratch
@@ -4602,7 +4614,7 @@ foo:
                 [Define if your assembler supports SPARC6 instructions.])])
 
     gcc_GAS_CHECK_FEATURE([LEON instructions],
-      gcc_cv_as_sparc_leon,,
+      gcc_cv_as_sparc_leon,
       [-Aleon],
       [.text
        .register %g2, #scratch
@@ -4642,16 +4654,15 @@ changequote([,])dnl
        # Recent binutils allows the three-operand form of ".comm" on PE.  This
        # definition is used unconditionally to initialise the default state of
        # the target option variable that governs usage of the feature.
-       gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
-        [2,19,52],,[.comm foo,1,32])
+       gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,,
+         [.comm foo,1,32])
        AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
          [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
          [Define if your assembler supports specifying the alignment
           of objects allocated using the GAS .comm command.])
        # Used for DWARF 2 in PE
        gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
-         gcc_cv_as_ix86_pe_secrel32,
-         [2,15,91],,
+         gcc_cv_as_ix86_pe_secrel32,,
 [.text
 foo:   nop
 .data
@@ -4668,7 +4679,7 @@ foo:      nop
        # but normally only after installation, so we warn but don't fail the
        # configure if LTO is enabled but the assembler does not support it.
        gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
-         [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
+         -fatal-warnings,[.section lto_test,"dr0"])
        if test x$gcc_cv_as_section_has_align != xyes; then
          case ",$enable_languages," in
            *,lto,*)
@@ -4678,51 +4689,60 @@ foo:    nop
        fi
        ;;
     esac
+    case $target_os in
+       darwin2[[0-9]]* | darwin19*)
+        gcc_GAS_CHECK_FEATURE([llvm assembler x86-pad-for-align option],
+          gcc_cv_as_mllvm_x86_pad_for_align,
+          [-mllvm -x86-pad-for-align=false], [.text],,
+          [AC_DEFINE(HAVE_AS_MLLVM_X86_PAD_FOR_ALIGN, 1,
+           [Define if your Mac OS X assembler supports -mllvm -x86-pad-for-align=false.])])
+       ;;
+    esac
 
-    gcc_GAS_CHECK_FEATURE([-xbrace_comment], gcc_cv_as_ix86_xbrace_comment,,
+    gcc_GAS_CHECK_FEATURE([-xbrace_comment], gcc_cv_as_ix86_xbrace_comment,
       [-xbrace_comment=no], [.text],,
       [AC_DEFINE(HAVE_AS_XBRACE_COMMENT_OPTION, 1,
                [Define if your assembler supports -xbrace_comment option.])])
 
     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
-       gcc_cv_as_ix86_filds,,,
+       gcc_cv_as_ix86_filds,,
        [filds (%ebp); fists (%ebp)],,
        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
          [Define if your assembler uses filds and fists mnemonics.])])
 
     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
-       gcc_cv_as_ix86_fildq,,,
+       gcc_cv_as_ix86_fildq,,
        [fildq (%ebp); fistpq (%ebp)],,
        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
          [Define if your assembler uses fildq and fistq mnemonics.])])
 
     gcc_GAS_CHECK_FEATURE([cmov syntax],
-      gcc_cv_as_ix86_cmov_sun_syntax,,,
+      gcc_cv_as_ix86_cmov_sun_syntax,,
       [cmovl.l %edx, %eax],,
       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
         [Define if your assembler supports the Sun syntax for cmov.])])
 
     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
-      gcc_cv_as_ix86_ffreep,,,
+      gcc_cv_as_ix86_ffreep,,
       [ffreep %st(1)],,
       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
         [Define if your assembler supports the ffreep mnemonic.])])
 
     gcc_GAS_CHECK_FEATURE([.quad directive],
-      gcc_cv_as_ix86_quad,,,
+      gcc_cv_as_ix86_quad,,
       [.quad 0],,
       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
         [Define if your assembler supports the .quad directive.])])
 
     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
-      gcc_cv_as_ix86_sahf,,,
+      gcc_cv_as_ix86_sahf,,
       [.code64
        sahf],,
       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
 
     gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
-      gcc_cv_as_ix86_interunit_movq,,,
+      gcc_cv_as_ix86_interunit_movq,,
       [.code64
        movq %mm0, %rax
        movq %rax, %xmm0])
@@ -4731,19 +4751,19 @@ foo:    nop
       [Define if your assembler supports interunit movq mnemonic.])
 
     gcc_GAS_CHECK_FEATURE([hle prefixes],
-      gcc_cv_as_ix86_hle,,,
+      gcc_cv_as_ix86_hle,,
       [lock xacquire cmpxchg %esi, (%ecx)],,
       [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
         [Define if your assembler supports HLE prefixes.])])
 
     gcc_GAS_CHECK_FEATURE([swap suffix],
-      gcc_cv_as_ix86_swap,,,
+      gcc_cv_as_ix86_swap,,
       [movl.s %esp, %ebp],,
       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
         [Define if your assembler supports the swap suffix.])])
 
     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
-      gcc_cv_as_ix86_diff_sect_delta,,,
+      gcc_cv_as_ix86_diff_sect_delta,,
       [.section .rodata
 .L1:
         .long .L2-.L1
@@ -4755,7 +4775,7 @@ foo:      nop
         [Define if your assembler supports the subtraction of symbols in different sections.])])
 
     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
-        gcc_cv_as_ix86_rep_lock_prefix,,,
+        gcc_cv_as_ix86_rep_lock_prefix,,
        [rep movsl
         rep ret
         rep nop
@@ -4767,7 +4787,7 @@ foo:      nop
           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
 
     gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
-       gcc_cv_as_ix86_ud2,,,
+       gcc_cv_as_ix86_ud2,,
        [ud2],,
       [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
        [Define if your assembler supports the 'ud2' mnemonic.])])
@@ -4785,7 +4805,7 @@ foo:      nop
     fi
 
     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
-        gcc_cv_as_ix86_tlsgdplt,,
+        gcc_cv_as_ix86_tlsgdplt,
        [$as_ix86_gas_32_opt],
        [call    tls_gd@tlsgdplt],
        [if test x$gcc_cv_ld != x \
@@ -4803,7 +4823,7 @@ tls_ld:
         call    tls_ld@tlsldmplt'
 
     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
-        gcc_cv_as_ix86_tlsldmplt,,
+        gcc_cv_as_ix86_tlsldmplt,
        [$as_ix86_gas_32_opt],
        [$conftest_s],
        [if test x$gcc_cv_ld != x \
@@ -4827,7 +4847,7 @@ _start:
         .type  value, @object
 value:'
     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
-        gcc_cv_as_ix86_tlsldm,,
+        gcc_cv_as_ix86_tlsldm,
        [$as_ix86_gas_32_opt],
        [$conftest_s],
        [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
@@ -4852,7 +4872,7 @@ _start:
         cmpl $0, bar@GOT
         jmp *_start@GOT'
     gcc_GAS_CHECK_FEATURE([R_386_GOT32X reloc],
-        gcc_cv_as_ix86_got32x,,
+        gcc_cv_as_ix86_got32x,
        [$as_ix86_gas_32_opt],
        [$conftest_s],
        [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
@@ -4873,7 +4893,7 @@ _start:
       [Define 0/1 if your assembler and linker support @GOT.])
 
     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
-      gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
+      gcc_cv_as_ix86_gotoff_in_data,
       [$as_ix86_gas_32_opt],
 [      .text
 .L0:
@@ -4903,7 +4923,7 @@ ld:
 gd:
        .byte 0'
     gcc_GAS_CHECK_FEATURE([calling ___tls_get_addr via GOT],
-        gcc_cv_as_ix86_tls_get_addr_via_got,,
+        gcc_cv_as_ix86_tls_get_addr_via_got,
        [$as_ix86_gas_32_opt],
        [$conftest_s],
        [if test x$gcc_cv_ld != x \
@@ -4918,7 +4938,7 @@ gd:
 
   ia64*-*-*)
     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
-       gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
+       gcc_cv_as_ia64_ltoffx_ldxmov_relocs,,
 [      .text
        addl r15 = @ltoffx(x#), gp
        ;;
@@ -4934,7 +4954,7 @@ gd:
     case $target in
       *-*-darwin*)
        gcc_GAS_CHECK_FEATURE([.machine directive support],
-         gcc_cv_as_machine_directive,,,
+         gcc_cv_as_machine_directive,,
          [     .machine ppc7400])
        if test x$gcc_cv_as_machine_directive != xyes; then
          echo "*** This target requires an assembler supporting \".machine\"" >&2
@@ -4956,7 +4976,7 @@ gd:
     esac
 
     gcc_GAS_CHECK_FEATURE([mfcr field support],
-      gcc_cv_as_powerpc_mfcrf, [2,14,0],,
+      gcc_cv_as_powerpc_mfcrf,,
       [$conftest_s],,
       [AC_DEFINE(HAVE_AS_MFCRF, 1,
          [Define if your assembler supports mfcr field.])])
@@ -4975,7 +4995,7 @@ LCF0:
     esac
 
     gcc_GAS_CHECK_FEATURE([rel16 relocs],
-      gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
+      gcc_cv_as_powerpc_rel16, -a32,
       [$conftest_s],,
       [AC_DEFINE(HAVE_AS_REL16, 1,
          [Define if your assembler supports R_PPC_REL16 relocs.])])
@@ -4990,25 +5010,25 @@ LCF0:
     esac
 
     gcc_GAS_CHECK_FEATURE([vector-scalar support],
-      gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
+      gcc_cv_as_powerpc_vsx, -a32,
       [$conftest_s],,
       [AC_DEFINE(HAVE_AS_VSX, 1,
          [Define if your assembler supports VSX instructions.])])
 
     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
-      gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
+      gcc_cv_as_powerpc_gnu_attribute,,
       [.gnu_attribute 4,1],,
       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
          [Define if your assembler supports .gnu_attribute.])])
 
     gcc_GAS_CHECK_FEATURE([prologue entry point marker support],
-      gcc_cv_as_powerpc_entry_markers, [2,26,0],-a64 --fatal-warnings,
+      gcc_cv_as_powerpc_entry_markers,-a64 --fatal-warnings,
       [ .reloc .,R_PPC64_ENTRY; nop],,
       [AC_DEFINE(HAVE_AS_ENTRY_MARKERS, 1,
          [Define if your assembler supports the R_PPC64_ENTRY relocation.])])
 
     gcc_GAS_CHECK_FEATURE([plt sequence marker support],
-      gcc_cv_as_powerpc_pltseq_markers, [2,31,0],-a32 --fatal-warnings,
+      gcc_cv_as_powerpc_pltseq_markers,-a32 --fatal-warnings,
       [ .reloc .,R_PPC_PLTSEQ; nop],,
       [AC_DEFINE(HAVE_AS_PLTSEQ, 1,
          [Define if your assembler supports R_PPC*_PLTSEQ relocations.])])
@@ -5016,7 +5036,7 @@ LCF0:
     case $target in
       *-*-aix*)
        gcc_GAS_CHECK_FEATURE([AIX .ref support],
-         gcc_cv_as_aix_ref, [2,21,0],,
+         gcc_cv_as_aix_ref,,
          [     .csect stuff[[rw]]
             stuff:
                .long 1
@@ -5027,7 +5047,7 @@ LCF0:
            [Define if your assembler supports .ref])])
 
        gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
-         gcc_cv_as_aix_dwloc, [2,21,0],,
+         gcc_cv_as_aix_dwloc,,
          [     .dwsect 0xA0000
        Lframe..0:
                .vbyte 4,Lframe..0
@@ -5040,7 +5060,7 @@ LCF0:
 
   mips*-*-*)
     gcc_GAS_CHECK_FEATURE([explicit relocation support],
-      gcc_cv_as_mips_explicit_relocs, [2,14,0],,
+      gcc_cv_as_mips_explicit_relocs,,
 [      lw $4,%gp_rel(foo)($4)],,
       [if test x$target_cpu_default = x
        then target_cpu_default=MASK_EXPLICIT_RELOCS
@@ -5048,18 +5068,18 @@ LCF0:
        fi])
 
     gcc_GAS_CHECK_FEATURE([-mno-shared support],
-      gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
+      gcc_cv_as_mips_no_shared,[-mno-shared], [nop],,
       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
                 [Define if the assembler understands -mno-shared.])])
 
     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
-      gcc_cv_as_mips_gnu_attribute, [2,18,0],,
+      gcc_cv_as_mips_gnu_attribute,,
       [.gnu_attribute 4,1],,
       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
          [Define if your assembler supports .gnu_attribute.])])
 
     gcc_GAS_CHECK_FEATURE([.module support],
-      gcc_cv_as_mips_dot_module,,[-32],
+      gcc_cv_as_mips_dot_module,[-32],
       [.module mips2
        .module fp=xx],,
       [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
@@ -5071,13 +5091,13 @@ LCF0:
     fi
 
     gcc_GAS_CHECK_FEATURE([.micromips support],
-      gcc_cv_as_micromips_support,,[--fatal-warnings],
+      gcc_cv_as_micromips_support,[--fatal-warnings],
       [.set micromips],,
       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
           [Define if your assembler supports the .set micromips directive])])
 
     gcc_GAS_CHECK_FEATURE([.dtprelword support],
-      gcc_cv_as_mips_dtprelword, [2,18,0],,
+      gcc_cv_as_mips_dtprelword,,
       [.section .tdata,"awT",@progbits
 x:
        .word 2
@@ -5087,7 +5107,7 @@ x:
          [Define if your assembler supports .dtprelword.])])
 
     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
-      gcc_cv_as_mips_dspr1_mult,,,
+      gcc_cv_as_mips_dspr1_mult,,
 [      .set    mips32r2
        .set    nodspr2
        .set    dsp
@@ -5182,7 +5202,7 @@ pointers into PC-relative form.])
     fi
 
     gcc_GAS_CHECK_FEATURE([-mnan= support],
-      gcc_cv_as_mips_nan,,
+      gcc_cv_as_mips_nan,
       [-mnan=2008],,,
       [AC_DEFINE(HAVE_AS_NAN, 1,
                 [Define if the assembler understands -mnan=.])])
@@ -5196,12 +5216,12 @@ pointers into PC-relative form.])
     # Earlier GAS versions generically support .gnu_attribute, but the
     # msp430 assembler will not do anything with it.
     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
-      gcc_cv_as_msp430_gnu_attribute, [2,33,50],,
+      gcc_cv_as_msp430_gnu_attribute,,
       [.gnu_attribute 4,1],,
       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
          [Define if your assembler supports .gnu_attribute.])])
     gcc_GAS_CHECK_FEATURE([.mspabi_attribute support],
-      gcc_cv_as_msp430_mspabi_attribute, [2,33,50],,
+      gcc_cv_as_msp430_mspabi_attribute,,
       [.mspabi_attribute 4,2],,
       [AC_DEFINE(HAVE_AS_MSPABI_ATTRIBUTE, 1,
          [Define if your assembler supports .mspabi_attribute.])])
@@ -5214,7 +5234,7 @@ configured with --enable-newlib-nano-formatted-io.])
     # Versions 2.33 and earlier lacked support for the %gotoff relocation
     # syntax that is documented in the ABI specification.
     gcc_GAS_CHECK_FEATURE([support for %gotoff relocations in constant data],
-      gcc_cv_as_nios2_gotoff_relocation,,,
+      gcc_cv_as_nios2_gotoff_relocation,,
 [      .extern foo
        .data
        .long %gotoff(foo)],,
@@ -5223,29 +5243,29 @@ configured with --enable-newlib-nano-formatted-io.])
     ;;
     riscv*-*-*)
     gcc_GAS_CHECK_FEATURE([.attribute support],
-      gcc_cv_as_riscv_attribute, [2,32,0],,
+      gcc_cv_as_riscv_attribute,,
       [.attribute stack_align,4],,
       [AC_DEFINE(HAVE_AS_RISCV_ATTRIBUTE, 1,
          [Define if your assembler supports .attribute.])])
     gcc_GAS_CHECK_FEATURE([-misa-spec= support],
-      gcc_cv_as_riscv_isa_spec,,
+      gcc_cv_as_riscv_isa_spec,
       [-misa-spec=2.2],,,
       [AC_DEFINE(HAVE_AS_MISA_SPEC, 1,
                 [Define if the assembler understands -misa-spec=.])])
     gcc_GAS_CHECK_FEATURE([-march=rv32i_zifencei support],
-      gcc_cv_as_riscv_march_zifencei,,
+      gcc_cv_as_riscv_march_zifencei,
       [-march=rv32i_zifencei],,,
       [AC_DEFINE(HAVE_AS_MARCH_ZIFENCEI, 1,
                 [Define if the assembler understands -march=rv*_zifencei.])])
     ;;
     s390*-*-*)
     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
-      gcc_cv_as_s390_gnu_attribute, [2,18,0],,
+      gcc_cv_as_s390_gnu_attribute,,
       [.gnu_attribute 8,1],,
       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
          [Define if your assembler supports .gnu_attribute.])])
     gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
-      gcc_cv_as_s390_machine_machinemode, [2,24,0],,
+      gcc_cv_as_s390_machine_machinemode,,
       [        .machinemode push
        .machinemode pop
        .machine push
@@ -5253,17 +5273,17 @@ configured with --enable-newlib-nano-formatted-io.])
       [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
          [Define if your assembler supports .machine and .machinemode.])])
     gcc_GAS_CHECK_FEATURE([architecture modifiers support],
-      gcc_cv_as_s390_architecture_modifiers, [2,26,0],,
+      gcc_cv_as_s390_architecture_modifiers,,
       [        .machine z13+vx ],,
       [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
          [Define if your assembler supports architecture modifiers.])])
     gcc_GAS_CHECK_FEATURE([vector load/store alignment hints],
-      gcc_cv_as_s390_vector_loadstore_alignment_hints, [2,31,0],,
+      gcc_cv_as_s390_vector_loadstore_alignment_hints,,
       [        vl %v24,0(%r15),3 ],,
       [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS, 1,
          [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument.])])
     gcc_GAS_CHECK_FEATURE([vector load/store alignment hints on z13],
-      gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13,, [-mzarch -march=z13],
+      gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13, [-mzarch -march=z13],
       [        vl %v24,0(%r15),3 ],,
       [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13, 1,
          [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument on z13.])])
@@ -5288,6 +5308,57 @@ case "$target" in
     ;;
 esac
 
+# This tests if the assembler supports two registers for global_load functions
+# (like in LLVM versions <12) or one register (like in LLVM 12).
+case "$target" in
+  amdgcn-* | gcn-*)
+    AC_MSG_CHECKING(assembler fix for global_load functions)
+    gcc_cv_as_gcn_global_load_fixed=yes
+    if test x$gcc_cv_as != x; then
+      cat > conftest.s <<EOF
+       global_store_dwordx2    v[[1:2]], v[[4:5]], s[[14:15]]
+EOF
+      if $gcc_cv_as -triple=amdgcn--amdhsa -filetype=obj -mcpu=gfx900 -o conftest.o conftest.s > /dev/null 2>&1; then
+        gcc_cv_as_gcn_global_load_fixed=no
+      fi
+      rm -f conftest.s conftest.o conftest
+    fi
+    global_load_fixed=`if test x$gcc_cv_as_gcn_global_load_fixed = xyes; then echo 1; else echo 0; fi`
+    AC_DEFINE_UNQUOTED(HAVE_GCN_ASM_GLOBAL_LOAD_FIXED, $global_load_fixed,
+      [Define if your assembler has fixed global_load functions.])
+    AC_MSG_RESULT($gcc_cv_as_gcn_global_load_fixed)
+    ;;
+esac
+
+case "$target" in
+  amdgcn-* | gcn-*)
+    gcc_GAS_CHECK_FEATURE([assembler accepts -mattr=+sram-ecc for fiji],
+      gcc_cv_as_gcn_sram_ecc_fiji,
+      [-triple=amdgcn--amdhsa -mcpu=fiji -mattr=-xnack -mattr=+sram-ecc],
+      [.amdgcn_target "amdgcn-unknown-amdhsa--gfx803+sram-ecc"],,
+      [AC_DEFINE(HAVE_GCN_SRAM_ECC_FIJI, 1,
+       [Define if your assembler allows -mattr=+sram-ecc for fiji.])])
+    gcc_GAS_CHECK_FEATURE([assembler accepts -mattr=+sram-ecc for gfx900],
+      gcc_cv_as_gcn_sram_ecc_gfx900,
+      [-triple=amdgcn--amdhsa -mcpu=gfx900 -mattr=-xnack -mattr=+sram-ecc],
+      [.amdgcn_target "amdgcn-unknown-amdhsa--gfx900+sram-ecc"],,
+      [AC_DEFINE(HAVE_GCN_SRAM_ECC_GFX900, 1,
+       [Define if your assembler allows -mattr=+sram-ecc for gfx900.])])
+    gcc_GAS_CHECK_FEATURE([assembler accepts -mattr=+sram-ecc for gfx906],
+      gcc_cv_as_gcn_sram_ecc_gfx906,
+      [-triple=amdgcn--amdhsa -mcpu=gfx906 -mattr=-xnack -mattr=+sram-ecc],
+      [.amdgcn_target "amdgcn-unknown-amdhsa--gfx906+sram-ecc"],,
+      [AC_DEFINE(HAVE_GCN_SRAM_ECC_GFX906, 1,
+       [Define if your assembler allows -mattr=+sram-ecc for gfx906.])])
+    gcc_GAS_CHECK_FEATURE([assembler accepts -mattr=+sram-ecc for gfx908],
+      gcc_cv_as_gcn_sram_ecc_gfx908,
+      [-triple=amdgcn--amdhsa -mcpu=gfx908 -mattr=-xnack -mattr=+sram-ecc],
+      [.amdgcn_target "amdgcn-unknown-amdhsa--gfx908+sram-ecc"],,
+      [AC_DEFINE(HAVE_GCN_SRAM_ECC_GFX908, 1,
+       [Define if your assembler allows -mattr=+sram-ecc for gfx908.])])
+    ;;
+esac
+
 # ??? Not all targets support dwarf2 debug_line, even within a version
 # of gas.  Moreover, we need to emit a valid instruction to trigger any
 # info to the output file.  So, as supported targets are added to gas 2.11,
@@ -5313,8 +5384,8 @@ if test x"$insn" != x; then
        .loc 1 3 0
        $insn"
  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
-  gcc_cv_as_dwarf2_debug_line,
-  [elf,2,11,0],, [$conftest_s],
+  gcc_cv_as_dwarf2_debug_line,,
+  [$conftest_s],
   [if test x$gcc_cv_objdump != x \
    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
       | grep debug_line > /dev/null 2>&1; then
@@ -5330,7 +5401,7 @@ if test x"$insn" != x; then
 # by DW_AT_decl_file.  Approximate this test by testing if
 # the assembler bitches if the same index is assigned twice.
  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
-  gcc_cv_as_dwarf2_file_buggy,,,
+  gcc_cv_as_dwarf2_file_buggy,,
 [      .file 1 "foo.s"
        .file 1 "bar.s"])
 
@@ -5350,8 +5421,8 @@ if test x"$insn" != x; then
        .uleb128 .LVU1
 "
        gcc_GAS_CHECK_FEATURE([dwarf2 debug_view support],
-         gcc_cv_as_dwarf2_debug_view,
-         [elf,2,27,0],,[$conftest_s],,
+         gcc_cv_as_dwarf2_debug_view,,
+         [$conftest_s],,
          [AC_DEFINE(HAVE_AS_DWARF2_DEBUG_VIEW, 1,
   [Define if your assembler supports views in dwarf2 .loc directives.])])
     fi
@@ -5359,16 +5430,30 @@ if test x"$insn" != x; then
 
  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
   gcc_cv_as_gdwarf2_flag,
-  [elf,2,11,0], [--gdwarf2], [$insn],,
+  [--gdwarf2], [$insn],,
   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
 [Define if your assembler supports the --gdwarf2 option.])])
 
  gcc_GAS_CHECK_FEATURE([--gdwarf-5 option],
   gcc_cv_as_gdwarf_5_flag,
-  [elf,2,36,0], [--gdwarf-5], [$insn],,
-  [AC_DEFINE(HAVE_AS_GDWARF_5_DEBUG_FLAG, 1,
+  [--gdwarf-5], [$insn],
+  [if test x$gcc_cv_objdump != x \
+      && $gcc_cv_objdump -Wi conftest.o 2>&1 \
+        | grep DW_TAG_compile_unit > /dev/null 2>&1; then
+     gcc_cv_as_gdwarf_5_flag=yes;
+   fi],[AC_DEFINE(HAVE_AS_GDWARF_5_DEBUG_FLAG, 1,
 [Define if your assembler supports the --gdwarf-5 option.])])
 
+ case $target_os in
+   win32 | pe | cygwin* | mingw32*)
+     section_flags=\"dr\"
+     function_type=".def foo; .scl 2; .type 32; .endef"
+     function_size="";;
+   *)
+     section_flags=\"\",%progbits
+     function_type=".type foo, %function"
+     function_size=".size foo, .-foo";;
+ esac
  dwarf4_debug_info_size=0x46
  dwarf4_high_pc_form=7
  dwarf4_debug_aranges_size=0x2c
@@ -5380,16 +5465,16 @@ if test x"$insn" != x; then
 .Ltext0:
        .p2align 4
        .globl  foo
-       .type   foo, %function
+       $function_type
 foo:
 .LFB0:
 .LM1:
        $insn
 .LM2:
 .LFE0:
-       .size   foo, .-foo
+       $function_size
 .Letext0:
-       .section        .debug_info,\"\",%progbits
+       .section        .debug_info,$section_flags
 .Ldebug_info0:
        .4byte  $dwarf4_debug_info_size
        .2byte  0x4
@@ -5413,7 +5498,7 @@ foo:
        .byte   0x1
        .byte   0x9c
        .byte   0
-       .section        .debug_abbrev,\"\",%progbits
+       .section        .debug_abbrev,$section_flags
 .Ldebug_abbrev0:
        .byte   0x1
        .byte   0x11
@@ -5456,7 +5541,7 @@ foo:
        .byte   0
        .byte   0
        .byte   0
-       .section        .debug_aranges,\"\",%progbits
+       .section        .debug_aranges,$section_flags
        .4byte  $dwarf4_debug_aranges_size
        .2byte  0x2
        .4byte  .Ldebug_info0
@@ -5468,7 +5553,7 @@ foo:
        .${dwarf4_addr_size}byte        .Letext0-.Ltext0
        .${dwarf4_addr_size}byte        0
        .${dwarf4_addr_size}byte        0
-       .section        .debug_line,\"\",%progbits
+       .section        .debug_line,$section_flags
 .Ldebug_line0:
        .4byte  .LELT0-.LSLT0
 .LSLT0:
@@ -5522,26 +5607,26 @@ foo:
        .byte   0x1
        .byte   0x1
 .LELT0:
-       .section        .debug_str,\"\",%progbits
+       .section        .debug_str,$section_flags
        .ident  \"GCC\"
 "
    dwarf4_success=no
    if test $dwarf4_addr_size = 4; then
      gcc_GAS_CHECK_FEATURE([assembly of compiler generated 32-bit .debug_line],
-      gcc_cv_as_debug_line_32_flag,
-      [elf,2,36,0], [], [$conftest_s],,
+      gcc_cv_as_debug_line_32_flag,,
+      [$conftest_s],,
       [dwarf4_success=yes])
    else
      gcc_GAS_CHECK_FEATURE([assembly of compiler generated 64-bit .debug_line],
-      gcc_cv_as_debug_line_64_flag,
-      [elf,2,36,0], [], [$conftest_s],,
+      gcc_cv_as_debug_line_64_flag,,
+      [$conftest_s],,
       [dwarf4_success=yes])
    fi
    if test $dwarf4_success = yes; then
      dwarf4_success=no
      gcc_GAS_CHECK_FEATURE([--gdwarf-4 not refusing compiler generated .debug_line],
       gcc_cv_as_dwarf_4_debug_line_flag,
-      [elf,2,36,0], [--gdwarf-4], [$conftest_s],,
+      [--gdwarf-4], [$conftest_s],,
       [dwarf4_success=yes])
      break
    fi
@@ -5570,7 +5655,7 @@ foo:
 "
    dwarf4_success=no
    gcc_GAS_CHECK_FEATURE([--gdwarf-4 with the APP marker],
-     gcc_cv_as_dwarf_4_app_flag,,
+     gcc_cv_as_dwarf_4_app_flag,
      [--gdwarf-4], [$conftest_s],, [dwarf4_success=yes])
  fi
 
@@ -5578,19 +5663,19 @@ foo:
    conftest_s="\
        .text
        .globl  foo
-       .type   foo, %function
+       $function_type
 foo:
        $insn
-       .size   foo, .-foo
+       $function_size
        .file   1 \"foo.c\"
 "
    gcc_GAS_CHECK_FEATURE([working --gdwarf-4/--gdwarf-5 for all sources],
-     gcc_cv_as_working_gdwarf_n_flag,,
+     gcc_cv_as_working_gdwarf_n_flag,
      [--gdwarf-4],
      [$conftest_s],
      [changequote(,)dnl
-      if test x$gcc_cv_readelf != x \
-        && $gcc_cv_readelf -w conftest.o 2>&1 \
+      if test x$gcc_cv_objdump != x \
+        && $gcc_cv_objdump -W conftest.o 2>&1 \
                | grep conftest.s > /dev/null 2>&1; then
        gcc_cv_as_working_gdwarf_n_flag=no
       else
@@ -5606,19 +5691,19 @@ foo:
 
  gcc_GAS_CHECK_FEATURE([--gstabs option],
   gcc_cv_as_gstabs_flag,
-  [elf,2,11,0], [--gstabs], [$insn],,
+  [--gstabs], [$insn],,
   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
 [Define if your assembler supports the --gstabs option.])])
 
  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
   gcc_cv_as_debug_prefix_map_flag,
-  [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
+  [--debug-prefix-map /a=/b], [$insn],,
   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
 [Define if your assembler supports the --debug-prefix-map option.])])
 fi
 
 gcc_GAS_CHECK_FEATURE([compressed debug sections],
-  gcc_cv_as_compress_debug,,,,
+  gcc_cv_as_compress_debug,,,
   [# gas compiled without zlib cannot compress debug sections and warns
    # about it, but still exits successfully.  So check for this, too.
    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
@@ -5648,8 +5733,7 @@ AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
 [Define to the assembler option to disable compressed debug sections.])
 
-gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
- ,,
+gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,,
 [.lcomm bar,4,16],,
 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
   [Define if your assembler supports .lcomm with an alignment field.])])
@@ -5694,8 +5778,7 @@ AC_ARG_ENABLE(gnu-unique-object,
     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
 Valid choices are 'yes' and 'no'.]) ;;
   esac],
- [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
-   [elf,2,19,52],,
+ [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,,
    [.type foo, '$target_type_format_char'gnu_unique_object],,
 # We need to unquote above to to use the definition from config.gcc.
 # Also check for ld.so support, i.e. glibc 2.11 or higher.
@@ -5709,9 +5792,7 @@ fi
 AC_CACHE_CHECK([assembler for tolerance to line number 0],
  [gcc_cv_as_line_zero],
  [gcc_cv_as_line_zero=no
-  if test $in_tree_gas = yes; then
-    gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
-  elif test "x$gcc_cv_as" != x; then
+  if test "x$gcc_cv_as" != x; then
     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
        test "x`cat conftest.out`" = x
@@ -6135,6 +6216,88 @@ if test x"$ld64_flag" = x"yes"; then
   [Define to 1 if ld64 supports '-export_dynamic'.])
 fi
 
+if test x"$dsymutil_flag" = x"yes"; then
+
+    # If the user specified a dsymutil path, then we will already have the
+    # version string, otherwise, pick it up.
+    if test x"$gcc_cv_dsymutil" = x; then
+        AC_MSG_WARN([dsymutil is a required tool for this system, but not found])
+        dsymutil_vers="tool unspecified"
+    elif test x"$dsymutil_vers" = x; then
+       dsymutil_vers=`$gcc_cv_dsymutil -v /dev/null 2>&1`
+    fi
+
+    dsymutil_temp=`echo $dsymutil_vers | sed 1q`
+    AC_MSG_CHECKING(dsymutil version "$dsymutil_temp")
+    if echo $dsymutil_temp | grep dwarfutils- > /dev/null; then
+      dsymutil_kind=DWARFUTILS
+      dsymutil_vers=`echo $dsymutil_temp | sed 's/.*dwarfutils-\([[0-9\.]]*\).*/\1/'`
+    elif echo $dsymutil_temp | grep clang- > /dev/null; then
+      dsymutil_kind=CLANG
+      dsymutil_vers=`echo $dsymutil_temp | sed 's/.*clang-\([[0-9\.]]*\).*/\1/'`
+    elif echo $dsymutil_temp | grep 'LLVM version ' > /dev/null; then
+      dsymutil_kind=LLVM
+      dsymutil_vers=`echo $dsymutil_temp | sed 's/.*LLVM\ version\ \([[0-9\.]]*\).*/\1/'`
+    else
+      dsymutil_kind=UNKNOWN
+      dsymutil_vers="0.0"
+    fi
+    dsymutil_major=`expr "$dsymutil_vers" : '\([[0-9]]*\)'`
+    dsymutil_minor=`expr "$dsymutil_vers" : '[[0-9]]*\.\([[0-9]]*\)'`
+    dsymutil_tiny=`expr "$dsymutil_vers" : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
+    if test x"${dsymutil_minor}" = x; then
+      dsymutil_minor=0
+    fi
+    if test x"${dsymutil_tiny}" = x; then
+      dsymutil_tiny=0
+    fi
+    AC_DEFINE_UNQUOTED(DSYMUTIL_VERSION, [$dsymutil_kind,${dsymutil_major},${dsymutil_minor},${dsymutil_tiny}],
+        [Define to the dsymutil version.])
+    AC_MSG_RESULT($dsymutil_vers : $dsymutil_kind ${dsymutil_major} ${dsymutil_minor} ${dsymutil_tiny} )
+fi
+
+case $target_os in
+  win32 | pe | cygwin* | mingw32*)
+    AC_MSG_CHECKING(broken PE linker dwarf5 support)
+    gcc_cv_ld_broken_pe_dwarf5=yes
+    if test $in_tree_ld = yes ; then
+      if grep -q '\.debug_loclists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
+          $gcc_cv_ld_gld_srcdir/scripttempl/pe*.sc \
+        && grep -q '\.debug_rnglists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
+             $gcc_cv_ld_gld_srcdir/scripttempl/pe*.sc; then
+       gcc_cv_ld_broken_pe_dwarf5=no
+      fi
+    else
+      if $gcc_cv_ld --verbose 2>&1 | grep -q '\.debug_loclists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
+        && $gcc_cv_ld --verbose 2>&1 | grep -q '\.debug_rnglists.*BLOCK.*__section_alignment__.*NOLOAD.*:'; then
+       gcc_cv_ld_broken_pe_dwarf5=no
+      fi
+    fi
+    if test x$gcc_cv_ld_broken_pe_dwarf5 = xyes; then
+      AC_DEFINE(HAVE_LD_BROKEN_PE_DWARF5, 1,
+               [Define if the PE linker has broken DWARF 5 support.])
+    fi
+    AC_MSG_RESULT($gcc_cv_ld_broken_pe_dwarf5)
+
+    AC_MSG_CHECKING(PE linker --disable-dynamicbase support)
+    gcc_cv_ld_disable_dynamicbase=no
+    if test $in_tree_ld = yes; then
+      if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 36 -o "$gcc_cv_gld_major_version" -gt 2; then \
+        gcc_cv_ld_disable_dynamicbase=yes
+      fi
+    else
+      if $gcc_cv_ld --help 2>&1 | grep -q 'disable\-]dynamicbase' > /dev/null; then
+        gcc_cv_ld_disable_dynamicbase=yes
+      fi
+    fi
+    if test x"$gcc_cv_ld_disable_dynamicbase" = xyes; then
+      AC_DEFINE(HAVE_LD_PE_DISABLE_DYNAMICBASE, 1,
+                [Define if the PE linker supports --disable-dynamicbase option.])
+    fi
+    AC_MSG_RESULT($gcc_cv_ld_disable_dynamicbase)
+    ;;
+esac
+
 # --------
 # UNSORTED
 # --------
@@ -6924,7 +7087,12 @@ changequote([,])dnl
        $ok || continue
 
        all_lang_configurefrags="$all_lang_configurefrags \$(srcdir)/$gcc_subdir/config-lang.in"
-       all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
+       if test "x$language" = xc && test -n "$all_lang_makefrags"; then
+           # Put c/Make-lang.in fragment first to match serialization languages order.
+           all_lang_makefrags="\$(srcdir)/$gcc_subdir/Make-lang.in $all_lang_makefrags"
+       else
+           all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
+       fi
        if test -f $srcdir/$gcc_subdir/lang.opt; then
            lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
            all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
@@ -7096,6 +7264,8 @@ AC_SUBST(float_h_file)
 AC_SUBST(gcc_config_arguments)
 AC_SUBST(gcc_gxx_include_dir)
 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
+AC_SUBST(gcc_gxx_libcxx_include_dir)
+AC_SUBST(gcc_gxx_libcxx_include_dir_add_sysroot)
 AC_SUBST(host_exeext)
 AC_SUBST(host_xm_file_list)
 AC_SUBST(host_xm_include_list)
@@ -7394,7 +7564,8 @@ case $target in
       # cross build. are target headers available?
       # carefully coerce the build-system compiler to use target headers
       saved_CXXFLAGS="$CXXFLAGS"
-      CROSS_TEST_CXXFLAGS="-nostdinc ${XGCC_FLAGS_FOR_TARGET//-B/-idirafter/}"
+      fixed_XGCC_FLAGS_FOR_TARGET=`echo "$XGCC_FLAGS_FOR_TARGET" | sed 's/-B/-idirafter/g'`
+      CROSS_TEST_CXXFLAGS="-nostdinc $fixed_XGCC_FLAGS_FOR_TARGET"
       CXXFLAGS="$CROSS_TEST_CXXFLAGS"
       AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #include <math.h>