Sort static functions in topological order.

[pf3gnuchains/gcc-fork.git] / gcc / configure.ac

diff --git a/gcc/configure.ac b/gcc/configure.ac
index 1676c40..74dd9a3 100644 (file)
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -1568,6 +1568,14 @@ AC_ARG_ENABLE(secureplt,
 [  --enable-secureplt      enable -msecure-plt by default for PowerPC],
 [], [])
 
+AC_ARG_ENABLE(leading-mingw64-underscores,
+  AS_HELP_STRING([--enable-leading-mingw64-underscores],
+                 [Enable leading underscores on 64 bit mingw targets]),
+  [],[])
+AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
+  [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
+    [Define if we should use leading underscore on 64 bit mingw targets])])
+
 AC_ARG_ENABLE(cld,
 [  --enable-cld            enable -mcld by default for 32bit x86], [],
 [enable_cld=no])
@@ -2217,6 +2225,8 @@ else
        gcc_cv_ld_hidden=yes
        ;;
       *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
+       # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
+       # .symbolic was only added in Solaris 9 12/02.
         gcc_cv_ld_hidden=yes
        ;;
       *)
@@ -2649,7 +2659,7 @@ foo:      .long   25
        ;;
   i[34567]86-*-*)
     case "$target" in
-      i[34567]86-*-solaris2.[89]*)
+      i[34567]86-*-solaris2.[56789]*)
        # TLS was introduced in the Solaris 9 4/04 release but
        # we do not enable it by default on Solaris 9 either.
        if test "x$enable_tls" = xyes ; then
@@ -3202,6 +3212,19 @@ foo:     nop
           rm -f conftest],
          [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
            [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
+       # Test if the assembler supports the extended form of the .section
+       # directive that specifies section alignment.  LTO support uses this,
+       # but normally only after installation, so we warn but don't fail the
+       # configure if LTO is enabled but the assembler does not support it.
+       gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
+         [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
+       if test x$gcc_cv_as_section_has_align != xyes; then
+         case ",$enable_languages," in
+           *,lto,*)
+             AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
+             ;;
+         esac
+       fi
        ;;
     esac
 
@@ -3253,7 +3276,7 @@ foo:      nop
       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
         [Define if your assembler supports the subtraction of symbols in different sections.])])
 
-    # This one is used unconditionally by i386.[ch]; it is to be defined
+    # These two are used unconditionally by i386.[ch]; it is to be defined
     # to 1 if the feature is present, 0 otherwise.
     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
@@ -3265,6 +3288,15 @@ foo:     nop
     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
       [Define true if the assembler supports '.long foo@GOTOFF'.])
+
+    gcc_GAS_CHECK_FEATURE([rep and lock prefix],
+        gcc_cv_as_ix86_rep_lock_prefix,,,
+       [rep movsl
+        lock orl $0, (%esp)])
+    AC_DEFINE_UNQUOTED(HAVE_AS_IX86_REP_LOCK_PREFIX,
+      [`if test $gcc_cv_as_ix86_rep_lock_prefix = yes; then echo 1; else echo 0; fi`],
+      [Define true if the assembler supports 'rep <insn>, lock <insn>'.])
+
     ;;
 
   ia64*-*-*)
@@ -3816,7 +3848,8 @@ EOF
     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
         | grep "gc-sections option ignored" > /dev/null; then
       gcc_cv_ld_eh_gc_sections=no
-    elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
+    elif $gcc_cv_objdump -h conftest 2> /dev/null \
+         | grep gcc_except_table > /dev/null; then
       gcc_cv_ld_eh_gc_sections=yes
       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
       if test x$gcc_cv_as_comdat_group != xyes; then
@@ -3843,7 +3876,8 @@ EOF
          if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
               | grep "gc-sections option ignored" > /dev/null; then
            gcc_cv_ld_eh_gc_sections=no
-         elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
+         elif $gcc_cv_objdump -h conftest 2> /dev/null \
+              | grep gcc_except_table > /dev/null; then
            gcc_cv_ld_eh_gc_sections=yes
          fi
        fi
@@ -4270,6 +4304,17 @@ changequote([,])dnl
                    AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
                    enable_lto=yes
                    AC_SUBST(enable_lto)
+                   # LTO needs to speak the platform's object file format, and has a
+                   # number of implementations of the required binary file access APIs.
+                   # ELF is the most common, and default.  We only link libelf if ELF
+                   # is indeed the selected format.
+                   LTO_BINARY_READER=${lto_binary_reader}
+                   LTO_USE_LIBELF=-lelf
+                   if test "x$lto_binary_reader" != "xlto-elf" ; then
+                     LTO_USE_LIBELF=
+                   fi
+                   AC_SUBST(LTO_BINARY_READER)
+                   AC_SUBST(LTO_USE_LIBELF)
                    ;;
                *) ;;
        esac