X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fconfigure.ac;h=74dd9a3f8eaab74ba0909838e9dc432b101759d7;hb=de2bc49318bb75a38a6fa668fd5553cd8d92f19d;hp=d256b62b1042de4b5da9a785fdbc34d5f5ca46ce;hpb=d68451393afcbe8f25b843d0dd8d30a5d9ea78d6;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/configure.ac b/gcc/configure.ac
index d256b62b104..74dd9a3f8ea 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -1034,8 +1034,8 @@ AC_CHECK_FUNCS(elf_getshdrstrndx,,
 int main()
 {
   return elf_getshstrndx (NULL, 0) == 0;
-}]]), AC_DEFINE(HAVE_ELF_GETSHSTRNDX_GABI, 1,
-        [Define if elf_getshstrndx has gABI conformant return values.])])])]
+}]])], AC_DEFINE(HAVE_ELF_GETSHSTRNDX_GABI, 1,
+        [Define if elf_getshstrndx has gABI conformant return values.]))])]
   )
 LIBS="$save_LIBS"
 CPPFLAGS="$save_CPPFLAGS"
@@ -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$lto_binary_reader" != "xlto-elf" ; then
+		      LTO_USE_LIBELF=
+		    fi
+		    AC_SUBST(LTO_BINARY_READER)
+		    AC_SUBST(LTO_USE_LIBELF)
 		    ;;
 		*) ;;
 	esac
@@ -4456,15 +4501,23 @@ enable_plugin=yes; default_plugin=yes)
 pluginlibs=
 if test x"$enable_plugin" = x"yes"; then
 
+  case "${host}" in
+    *-*-darwin*)
+      export_sym_check="$gcc_cv_nm -g"
+    ;;
+    *)
+      export_sym_check="$gcc_cv_objdump -T"
+    ;;
+  esac
   AC_MSG_CHECKING([for exported symbols])
   echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
   ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
-  if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
+  if $export_sym_check conftest | grep foobar > /dev/null; then
     : # No need to use a flag
   else
     AC_MSG_CHECKING([for -rdynamic])
     ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
-    if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
+    if $export_sym_check conftest | grep foobar > /dev/null; then
       plugin_rdynamic=yes
       pluginlibs="-rdynamic"
     else
@@ -4484,7 +4537,14 @@ if test x"$enable_plugin" = x"yes"; then
 
   # Check that we can build shared objects with -fPIC -shared
   saved_LDFLAGS="$LDFLAGS"
-  LDFLAGS="$LDFLAGS -fPIC -shared"
+  case "${host}" in
+    *-*-darwin*)
+      LDFLAGS="$LDFLAGS -fPIC -shared -undefined dynamic_lookup"
+    ;;
+    *)
+      LDFLAGS="$LDFLAGS -fPIC -shared"
+    ;;
+  esac
   AC_MSG_CHECKING([for -fPIC -shared])
   AC_TRY_LINK(
     [extern int X;],[return X == 0;],