Update GCC to autoconf 2.69, automake 1.15.1 (PR bootstrap/82856).

[thirdparty/gcc.git] / libssp / configure.ac

diff --git a/libssp/configure.ac b/libssp/configure.ac
index 05c84f6f70ae196fbcdb221f60e632a7831ae8b0..24e805a1df31768c0a60e13a1cbd21fad3ffe712 100644 (file)
--- a/libssp/configure.ac
+++ b/libssp/configure.ac
@@ -1,12 +1,13 @@
 # Process this file with autoconf to produce a configure script, like so:
-# aclocal && autoconf && autoheader && automake
+# 
+# aclocal -I .. -I ../config && autoconf && autoheader && automake
 
-AC_PREREQ(2.59)
 AC_INIT(libssp, 1.0)
 AC_CONFIG_SRCDIR(ssp.c)
 AC_CANONICAL_SYSTEM
+ACX_NONCANONICAL_TARGET
 
-AM_INIT_AUTOMAKE
+AM_INIT_AUTOMAKE([no-dist])
 
 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
 AC_ARG_ENABLE(version-specific-runtime-libs,
@@ -20,7 +21,8 @@ AC_ARG_ENABLE(version-specific-runtime-libs,
 AC_MSG_RESULT($version_specific_libs)
 
 AM_MAINTAINER_MODE
-AC_EXEEXT
+
+GCC_NO_EXECUTABLES
 
 AM_ENABLE_MULTILIB(, ..)
 
@@ -38,7 +40,7 @@ AC_LANG_C
 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
 m4_define([_AC_ARG_VAR_PRECIOUS],[])
 AC_PROG_CC
-m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
+m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
 
 AC_SUBST(CFLAGS)
 
@@ -59,6 +61,11 @@ void __attribute__((noinline)) bar (char *x)
 [AC_MSG_RESULT(no)])
 CFLAGS="$save_CFLAGS"
 
+# Add CET specific flags if CET is enabled
+GCC_CET_FLAGS(CET_FLAGS)
+XCFLAGS="$XCFLAGS $CET_FLAGS"
+AC_SUBST(XCFLAGS)
+
 AC_MSG_CHECKING([whether hidden visibility is supported])
 AC_TRY_COMPILE([
 void __attribute__((visibility ("hidden"))) bar (void) {}],,
@@ -69,24 +76,61 @@ if test x$ssp_hidden = xyes; then
 fi
 
 AC_MSG_CHECKING([whether symbol versioning is supported])
-cat > conftest.map <<EOF
+AC_ARG_ENABLE(symvers,
+AS_HELP_STRING([--disable-symvers],
+  [disable symbol versioning for libssp]),
+ssp_use_symver=$enableval,
+ssp_use_symver=yes)
+if test "x$ssp_use_symver" != xno; then
+  if test x$gcc_no_link = xyes; then
+    # If we cannot link, we cannot build shared libraries, so do not use
+    # symbol versioning.
+    ssp_use_symver=no
+  else
+    save_LDFLAGS="$LDFLAGS"
+    LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
+    cat > conftest.map <<EOF
 FOO_1.0 {
   global: *foo*; bar; local: *;
 };
 EOF
-save_LDFLAGS="$LDFLAGS"
-LDFLAGS="$LDFLAGS -shared -Wl,--version-script,./conftest.map"
-AC_TRY_LINK([int foo;],[],[ssp_use_symver=yes],[ssp_use_symver=no])
-LDFLAGS="$save_LDFLAGS"
+    AC_TRY_LINK([int foo;],[],[ssp_use_symver=gnu],[ssp_use_symver=no])
+    if test x$ssp_use_symver = xno; then
+      case "$target_os" in
+        solaris2*)
+          LDFLAGS="$save_LDFLAGS"
+          LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
+          # Sun ld cannot handle wildcards and treats all entries as undefined.
+          cat > conftest.map <<EOF
+FOO_1.0 {
+  global: foo; local: *;
+};
+EOF
+          AC_TRY_LINK([int foo;],[],[ssp_use_symver=sun],[ssp_use_symver=no])
+         ;;
+      esac
+    fi
+    LDFLAGS="$save_LDFLAGS"
+  fi
+fi
 AC_MSG_RESULT($ssp_use_symver)
-AM_CONDITIONAL(LIBSSP_USE_SYMVER, [test "x$ssp_use_symver" = xyes])
+AM_CONDITIONAL(LIBSSP_USE_SYMVER, [test "x$ssp_use_symver" != xno])
+AM_CONDITIONAL(LIBSSP_USE_SYMVER_GNU, [test "x$ssp_use_symver" = xgnu])
+AM_CONDITIONAL(LIBSSP_USE_SYMVER_SUN, [test "x$ssp_use_symver" = xsun])
 
-AC_CHECK_HEADERS(alloca.h paths.h syslog.h string.h unistd.h fcntl.h stdio.h limits.h)
+AC_CHECK_HEADERS(alloca.h malloc.h paths.h syslog.h string.h unistd.h fcntl.h stdio.h limits.h)
 
-AC_CHECK_FUNCS(mempcpy strncpy strncat)
+if test x$gcc_no_link = xyes; then
+  # Presume the ISO C functions are available; add target-specific
+  # configuration here if required.
+  AC_DEFINE(HAVE_STRNCPY)
+  AC_DEFINE(HAVE_STRNCAT)
+else
+  AC_CHECK_FUNCS(memmove mempcpy strncpy strncat)
+fi
 
 AC_MSG_CHECKING([whether vsnprintf is usable])
-AC_RUN_IFELSE(AC_LANG_PROGRAM([
+AC_RUN_IFELSE([AC_LANG_PROGRAM([
 #include <stdarg.h>
 #include <string.h>
 #include <stdio.h>
@@ -102,7 +146,7 @@ int foo (char *buf, size_t n, const char *fmt, ...)
 [char buf@<:@8@:>@; memset (buf, 'A', sizeof (buf));
  if (foo (buf, 4, ".%s.", "CDEFG") != 7)
    return 1;
- return memcmp (buf, ".CD\0AAAA", sizeof (buf)) != 0;]),
+ return memcmp (buf, ".CD\0AAAA", sizeof (buf)) != 0;])],
 [ssp_have_usable_vsnprintf=define],
 [ssp_have_usable_vsnprintf=undef],
 [ssp_have_usable_vsnprintf=undef])
@@ -115,6 +159,7 @@ fi
 AC_SUBST(ssp_have_usable_vsnprintf)
 
 AM_PROG_LIBTOOL
+ACX_LT_HOST_FLAGS
 AC_SUBST(enable_shared)
 AC_SUBST(enable_static)
 
@@ -154,5 +199,8 @@ else
   multilib_arg=
 fi
 
+# Determine what GCC version number to use in filesystem paths.
+GCC_BASE_VER
+
 AC_CONFIG_FILES([Makefile ssp/ssp.h])
 AC_OUTPUT