-dnl Copyright (C) 2005, 2006, 2007, 2008, 2011, 2012
-dnl Free Software Foundation, Inc.
+dnl Copyright (C) 2005-2021 Free Software Foundation, Inc.
dnl
dnl This file is part of GCC.
dnl
AC_SUBST(INSTALL_DATA)dnl
])
-# mmap(2) blacklisting. Some platforms provide the mmap library routine
-# but don't support all of the features we need from it.
-AC_DEFUN([gcc_AC_FUNC_MMAP_BLACKLIST],
-[
-AC_CHECK_HEADER([sys/mman.h],
- [gcc_header_sys_mman_h=yes], [gcc_header_sys_mman_h=no])
-AC_CHECK_FUNC([mmap], [gcc_func_mmap=yes], [gcc_func_mmap=no])
-if test "$gcc_header_sys_mman_h" != yes \
- || test "$gcc_func_mmap" != yes; then
- gcc_cv_func_mmap_file=no
- gcc_cv_func_mmap_dev_zero=no
- gcc_cv_func_mmap_anon=no
-else
- AC_CACHE_CHECK([whether read-only mmap of a plain file works],
- gcc_cv_func_mmap_file,
- [# Add a system to this blacklist if
- # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a
- # memory area containing the same data that you'd get if you applied
- # read() to the same fd. The only system known to have a problem here
- # is VMS, where text files have record structure.
- case "$host_os" in
- vms* | ultrix*)
- gcc_cv_func_mmap_file=no ;;
- *)
- gcc_cv_func_mmap_file=yes;;
- esac])
- AC_CACHE_CHECK([whether mmap from /dev/zero works],
- gcc_cv_func_mmap_dev_zero,
- [# Add a system to this blacklist if it has mmap() but /dev/zero
- # does not exist, or if mmapping /dev/zero does not give anonymous
- # zeroed pages with both the following properties:
- # 1. If you map N consecutive pages in with one call, and then
- # unmap any subset of those pages, the pages that were not
- # explicitly unmapped remain accessible.
- # 2. If you map two adjacent blocks of memory and then unmap them
- # both at once, they must both go away.
- # Systems known to be in this category are Windows (all variants),
- # VMS, and Darwin.
- case "$host_os" in
- vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00)
- gcc_cv_func_mmap_dev_zero=no ;;
- *)
- gcc_cv_func_mmap_dev_zero=yes;;
- esac])
-
- # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for.
- AC_CACHE_CHECK([for MAP_ANON(YMOUS)], gcc_cv_decl_map_anon,
- [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-[#include <sys/types.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#ifndef MAP_ANONYMOUS
-#define MAP_ANONYMOUS MAP_ANON
-#endif
-],
-[int n = MAP_ANONYMOUS;])],
- gcc_cv_decl_map_anon=yes,
- gcc_cv_decl_map_anon=no)])
-
- if test $gcc_cv_decl_map_anon = no; then
- gcc_cv_func_mmap_anon=no
- else
- AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works],
- gcc_cv_func_mmap_anon,
- [# Add a system to this blacklist if it has mmap() and MAP_ANON or
- # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
- # doesn't give anonymous zeroed pages with the same properties listed
- # above for use of /dev/zero.
- # Systems known to be in this category are Windows, VMS, and SCO Unix.
- case "$host_os" in
- vms* | cygwin* | pe | mingw* | sco* | udk* )
- gcc_cv_func_mmap_anon=no ;;
- *)
- gcc_cv_func_mmap_anon=yes;;
- esac])
- fi
-fi
-
-if test $gcc_cv_func_mmap_file = yes; then
- AC_DEFINE(HAVE_MMAP_FILE, 1,
- [Define if read-only mmap of a plain file works.])
-fi
-if test $gcc_cv_func_mmap_dev_zero = yes; then
- AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1,
- [Define if mmap of /dev/zero works.])
-fi
-if test $gcc_cv_func_mmap_anon = yes; then
- AC_DEFINE(HAVE_MMAP_ANON, 1,
- [Define if mmap with MAP_ANON(YMOUS) works.])
-fi
-])
-
dnl Determine if enumerated bitfields are unsigned. ISO C says they can
dnl be either signed or unsigned.
dnl
fi])
AC_DEFUN([gcc_AC_INITFINI_ARRAY],
-[AC_REQUIRE([gcc_SUN_LD_VERSION])dnl
-AC_ARG_ENABLE(initfini-array,
+[AC_ARG_ENABLE(initfini-array,
[ --enable-initfini-array use .init_array/.fini_array sections],
[], [
AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
gcc_cv_initfini_array=yes
fi
elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
- cat > conftest.s <<\EOF
-.section .dtors,"a",%progbits
+ case $target:$gas in
+ *:yes)
+ sh_flags='"a"'
+ sh_type='%progbits'
+ ;;
+ i?86-*-solaris2*:no | x86_64-*-solaris2*:no)
+ sh_flags='"a"'
+ sh_type='@progbits'
+ ;;
+ sparc*-*-solaris2*:no)
+ sh_flags='#alloc'
+ sh_type='#progbits'
+ sh_quote='"'
+ ;;
+ esac
+ case "$target:$gnu_ld" in
+ *:yes)
+ cat > conftest.s <<EOF
+.section .dtors,$sh_flags,$sh_type
.balign 4
.byte 'A', 'A', 'A', 'A'
-.section .ctors,"a",%progbits
+.section .ctors,$sh_flags,$sh_type
.balign 4
.byte 'B', 'B', 'B', 'B'
-.section .fini_array.65530,"a",%progbits
+.section .fini_array.65530,$sh_flags,$sh_type
.balign 4
.byte 'C', 'C', 'C', 'C'
-.section .init_array.65530,"a",%progbits
+.section .init_array.65530,$sh_flags,$sh_type
.balign 4
.byte 'D', 'D', 'D', 'D'
-.section .dtors.64528,"a",%progbits
+.section .dtors.64528,$sh_flags,$sh_type
.balign 4
.byte 'E', 'E', 'E', 'E'
-.section .ctors.64528,"a",%progbits
+.section .ctors.64528,$sh_flags,$sh_type
.balign 4
.byte 'F', 'F', 'F', 'F'
-.section .fini_array.01005,"a",%progbits
+.section .fini_array.01005,$sh_flags,$sh_type
.balign 4
.byte 'G', 'G', 'G', 'G'
-.section .init_array.01005,"a",%progbits
+.section .init_array.01005,$sh_flags,$sh_type
.balign 4
.byte 'H', 'H', 'H', 'H'
.text
.globl _start
_start:
EOF
- if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
- && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \
- && $gcc_cv_objdump -s -j .init_array conftest \
- | grep HHHHFFFFDDDDBBBB > /dev/null 2>&1 \
- && $gcc_cv_objdump -s -j .fini_array conftest \
- | grep GGGGEEEECCCCAAAA > /dev/null 2>&1; then
- gcc_cv_initfini_array=yes
- fi
+ if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
+ && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \
+ && $gcc_cv_objdump -s -j .init_array conftest \
+ | grep HHHHFFFFDDDDBBBB > /dev/null 2>&1 \
+ && $gcc_cv_objdump -s -j .fini_array conftest \
+ | grep GGGGEEEECCCCAAAA > /dev/null 2>&1; then
+ gcc_cv_initfini_array=yes
+ fi
+ ;;
+ *-*-solaris2*:no)
+ # When Solaris ld added constructor priority support, it was
+ # decided to only handle .init_array.N/.fini_array.N since
+ # there was no need for backwards compatibility with
+ # .ctors.N/.dtors.N. .ctors/.dtors remain as separate
+ # sections with correct execution order resp. to
+ # .init_array/.fini_array, while gld merges them into
+ # .init_array/.fini_array.
+ cat > conftest.s <<EOF
+.section $sh_quote.fini_array.65530$sh_quote,$sh_flags,$sh_type
+.align 4
+.byte 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C'
+.section $sh_quote.init_array.65530$sh_quote,$sh_flags,$sh_type
+.align 4
+.byte 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D'
+.section $sh_quote.fini_array.01005$sh_quote,$sh_flags,$sh_type
+.align 4
+.byte 'G', 'G', 'G', 'G', 'G', 'G', 'G', 'G'
+.section $sh_quote.init_array.01005$sh_quote,$sh_flags,$sh_type
+.align 4
+.byte 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H'
+.text
+.globl _start
+_start:
+EOF
+ if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
+ && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \
+ && $gcc_cv_objdump -s -j .init_array conftest \
+ | grep HHHHHHHHDDDDDDDD > /dev/null 2>&1 \
+ && $gcc_cv_objdump -s -j .fini_array conftest \
+ | grep GGGGGGGGCCCCCCCC > /dev/null 2>&1; then
+ gcc_cv_initfini_array=yes
+ fi
+ ;;
+ esac
changequote(,)dnl
rm -f conftest conftest.*
changequote([,])dnl
# error The C library not known to support .init_array/.fini_array
# endif
#endif
-])],[
- case "${target}" in
- *-*-solaris2.8*)
- # .init_array/.fini_array support was introduced in Solaris 8
- # patches 109147-08 (sparc) and 109148-08 (x86). Since ld.so.1 and
- # ld are guaranteed to be updated in lockstep, we can check ld -V
- # instead. Unfortunately, proper ld version numbers were only
- # introduced in rev. -14, so we check for that.
- if test "$gcc_cv_sun_ld_vers_minor" -lt 272; then
- gcc_cv_initfini_array=no
- fi
- ;;
- *-*-solaris2.9* | *-*-solaris2.1[[0-9]]*)
- # .init_array/.fini_array support is present since Solaris 9 FCS.
- ;;
- esac
-], [gcc_cv_initfini_array=no]);;
+])],, [gcc_cv_initfini_array=no]);;
esac
else
- AC_MSG_CHECKING(cross compile... guessing)
- gcc_cv_initfini_array=no
+ case "${target}" in
+ aarch64*-linux-gnu*)
+ # AArch64 postdates glibc support for .init_array/.fini_array,
+ # so we don't need the preprocessor test above.
+ gcc_cv_initfini_array=yes
+ ;;
+
+ *)
+ AC_MSG_CHECKING(cross compile... guessing)
+ gcc_cv_initfini_array=no
+ ;;
+ esac
fi])
enable_initfini_array=$gcc_cv_initfini_array
])
-if test $enable_initfini_array = yes; then
- AC_DEFINE(HAVE_INITFINI_ARRAY_SUPPORT, 1,
- [Define .init_array/.fini_array sections are available and working.])
-fi])
-
-dnl # _gcc_COMPUTE_GAS_VERSION
-dnl # Used by gcc_GAS_VERSION_GTE_IFELSE
-dnl #
-dnl # WARNING:
-dnl # gcc_cv_as_gas_srcdir must be defined before this.
-dnl # This gross requirement will go away eventually.
-AC_DEFUN([_gcc_COMPUTE_GAS_VERSION],
-[gcc_cv_as_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
-for f in $gcc_cv_as_bfd_srcdir/configure \
- $gcc_cv_as_gas_srcdir/configure \
- $gcc_cv_as_gas_srcdir/configure.in \
- $gcc_cv_as_gas_srcdir/Makefile.in ; do
- gcc_cv_gas_version=`sed -n -e 's/^[[ ]]*\(VERSION=[[0-9]]*\.[[0-9]]*.*\)/\1/p' < $f`
- if test x$gcc_cv_gas_version != x; then
- break
- fi
-done
-gcc_cv_gas_major_version=`expr "$gcc_cv_gas_version" : "VERSION=\([[0-9]]*\)"`
-gcc_cv_gas_minor_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.\([[0-9]]*\)"`
-gcc_cv_gas_patch_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)"`
-case $gcc_cv_gas_patch_version in
- "") gcc_cv_gas_patch_version="0" ;;
-esac
-gcc_cv_gas_vers=`expr \( \( $gcc_cv_gas_major_version \* 1000 \) \
- + $gcc_cv_gas_minor_version \) \* 1000 \
- + $gcc_cv_gas_patch_version`
-]) []dnl # _gcc_COMPUTE_GAS_VERSION
-
-dnl # gcc_GAS_VERSION_GTE_IFELSE([elf,] major, minor, patchlevel,
-dnl # [command_if_true = :], [command_if_false = :])
-dnl # Check to see if the version of GAS is greater than or
-dnl # equal to the specified version.
-dnl #
-dnl # The first ifelse() shortens the shell code if the patchlevel
-dnl # is unimportant (the usual case). The others handle missing
-dnl # commands. Note that the tests are structured so that the most
-dnl # common version number cases are tested first.
-AC_DEFUN([_gcc_GAS_VERSION_GTE_IFELSE],
-[ifelse([$1], elf,
- [if test $in_tree_gas_is_elf = yes \
- &&],
- [if]) test $gcc_cv_gas_vers -ge `expr \( \( $2 \* 1000 \) + $3 \) \* 1000 + $4`
- then dnl
-ifelse([$5],,:,[$5])[]dnl
-ifelse([$6],,,[
- else $6])
-fi])
-
-AC_DEFUN([gcc_GAS_VERSION_GTE_IFELSE],
-[AC_REQUIRE([_gcc_COMPUTE_GAS_VERSION])dnl
-ifelse([$1], elf, [_gcc_GAS_VERSION_GTE_IFELSE($@)],
- [_gcc_GAS_VERSION_GTE_IFELSE(,$@)])])
+AC_DEFINE_UNQUOTED(HAVE_INITFINI_ARRAY_SUPPORT,
+ [`if test $enable_initfini_array = yes; then echo 1; else echo 0; fi`],
+ [Define 0/1 if .init_array/.fini_array sections are available and working.])
+])
dnl # gcc_GAS_FLAGS
dnl # Used by gcc_GAS_CHECK_FEATURE
[AC_CACHE_CHECK([assembler flags], gcc_cv_as_flags,
[ case "$target" in
i[[34567]]86-*-linux*)
- dnl Always pass --32 to ia32 Linux assembler.
- gcc_cv_as_flags="--32"
+ dnl Override the default, which may be incompatible.
+ gcc_cv_as_flags=--32
+ ;;
+ x86_64-*-linux-gnux32)
+ dnl Override the default, which may be incompatible.
+ gcc_cv_as_flags=--x32
+ ;;
+ x86_64-*-linux*)
+ dnl Override the default, which may be incompatible.
+ gcc_cv_as_flags=--64
;;
powerpc*-*-darwin*)
dnl Always pass -arch ppc to assembler.
esac])
])
-dnl gcc_GAS_CHECK_FEATURE(description, cv, [[elf,]major,minor,patchlevel],
+dnl gcc_GAS_CHECK_FEATURE(description, cv,
dnl [extra switches to as], [assembler input],
dnl [extra testing logic], [command if feature available])
dnl
-dnl Checks for an assembler feature. If we are building an in-tree
-dnl gas, the feature is available if the associated assembler version
-dnl is greater than or equal to major.minor.patchlevel. If not, then
+dnl Checks for an assembler feature.
dnl ASSEMBLER INPUT is fed to the assembler and the feature is available
dnl if assembly succeeds. If EXTRA TESTING LOGIC is not the empty string,
dnl then it is run instead of simply setting CV to "yes" - it is responsible
[AC_REQUIRE([gcc_GAS_FLAGS])dnl
AC_CACHE_CHECK([assembler for $1], [$2],
[[$2]=no
- ifelse([$3],,,[dnl
- if test $in_tree_gas = yes; then
- gcc_GAS_VERSION_GTE_IFELSE($3, [[$2]=yes])
- el])if test x$gcc_cv_as != x; then
- AS_ECHO([ifelse(m4_substr([$5],0,1),[$], "[$5]", '[$5]')]) > conftest.s
- if AC_TRY_COMMAND([$gcc_cv_as $gcc_cv_as_flags $4 -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD])
+ if test x$gcc_cv_as != x; then
+ AS_ECHO([ifelse(m4_substr([$4],0,1),[$], "[$4]", '[$4]')]) > conftest.s
+ if AC_TRY_COMMAND([$gcc_cv_as $gcc_cv_as_flags $3 -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD])
then
- ifelse([$6],, [$2]=yes, [$6])
+ ifelse([$5],, [$2]=yes, [$5])
else
echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
cat conftest.s >&AS_MESSAGE_LOG_FD
fi
rm -f conftest.o conftest.s
fi])
-ifelse([$7],,,[dnl
+ifelse([$6],,,[dnl
if test $[$2] = yes; then
+ $6
+fi])
+ifelse([$7],,,[dnl
+if test $[$2] != yes; then
$7
fi])])
-dnl gcc_SUN_LD_VERSION
-dnl
-dnl Determines Sun linker version numbers, setting gcc_cv_sun_ld_vers to
-dnl the complete version number and gcc_cv_sun_ld_vers_{major, minor} to
-dnl the corresponding fields.
-dnl
-dnl ld and ld.so.1 are guaranteed to be updated in lockstep, so ld version
-dnl numbers can be used in ld.so.1 feature checks even if a different
-dnl linker is configured.
-dnl
-AC_DEFUN([gcc_SUN_LD_VERSION],
-[changequote(,)dnl
-if test "x${build}" = "x${target}" && test "x${build}" = "x${host}"; then
- case "${target}" in
- *-*-solaris2*)
- #
- # Solaris 2 ld -V output looks like this for a regular version:
- #
- # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
- #
- # but test versions add stuff at the end:
- #
- # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
- #
- gcc_cv_sun_ld_ver=`/usr/ccs/bin/ld -V 2>&1`
- if echo "$gcc_cv_sun_ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
- gcc_cv_sun_ld_vers=`echo $gcc_cv_sun_ld_ver | sed -n \
- -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
- gcc_cv_sun_ld_vers_major=`expr "$gcc_cv_sun_ld_vers" : '\([0-9]*\)'`
- gcc_cv_sun_ld_vers_minor=`expr "$gcc_cv_sun_ld_vers" : '[0-9]*\.\([0-9]*\)'`
- fi
- ;;
- esac
-fi
-changequote([,])dnl
-])
-
dnl GCC_TARGET_TEMPLATE(KEY)
dnl ------------------------
dnl Define KEY as a valid configure key on the target machine.
AC_DEFUN([gcc_AC_BUILD_EXEEXT], [
ac_executable_extensions="$build_exeext"])
+dnl GCC_GLIBC_VERSION_GTE_IFELSE(MAJOR, MINOR, IF-TRUE, IF-FALSE)
+dnl -------------------------------------------------------------
+dnl If the target glibc version ($glibc_version_major.$glibc_version_minor)
+dnl is at least MAJOR.MINOR, call IF-TRUE, otherwise call IF-FALSE.
+AC_DEFUN([GCC_GLIBC_VERSION_GTE_IFELSE],
+[
+AS_IF([test $glibc_version_major -gt $1 \
+ || ( test $glibc_version_major -eq $1 && test $glibc_version_minor -ge $2 )],
+[$3], [$4])])
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