X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=configure.ac;h=a721316d07b7df4770114c1a4acaa213bb953d8a;hb=41919a58ce12a0ed6230b2f3820c65ad980ca19e;hp=d16a27576896b777fcd5c49e11c3939a5fe32382;hpb=f6720b1cfe8f70ef5631b390780dfb53166e9ff2;p=deliverable%2Fbinutils-gdb.git

diff --git a/configure.ac b/configure.ac
index d16a275768..a721316d07 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,6 +23,7 @@ m4_include(config/acx.m4)
 m4_include(config/override.m4)
 m4_include(config/proginstall.m4)
 m4_include(config/elf.m4)
+m4_include(config/gcc-plugin.m4)
 m4_include([libtool.m4])
 m4_include([ltoptions.m4])
 m4_include([ltsugar.m4])
@@ -727,9 +728,6 @@ case "${target}" in
   arm-wince-pe)
     noconfigdirs="$noconfigdirs target-libffi"
     ;;
-  arm*-*-symbianelf*)
-    noconfigdirs="$noconfigdirs target-libffi"
-    ;;
   cris-*-* | crisv32-*-*)
     case "${target}" in
       *-*-linux*)
@@ -1374,6 +1372,65 @@ if test "$enable_bootstrap:$GXX" = "yes:yes"; then
   CXX="$CXX -std=gnu++98"
 fi
 
+AC_ARG_ENABLE([pgo-build],
+[AS_HELP_STRING([--enable-pgo-build[[=lto]]],
+		[enable the PGO build])],
+[enable_pgo_build=$enableval],
+[enable_pgo_build=no])
+
+# Issue errors and warnings for invalid/strange PGO build combinations.
+case "$have_compiler:$host:$target:$enable_pgo_build" in
+  *:*:*:no) ;;
+
+  # Allow the PGO build only if we aren't building a compiler and
+  # we are in a native configuration.
+  no:$build:$build:yes | no:$build:$build:lto) ;;
+
+  # Disallow the PGO bootstrap if we are building a compiler.
+  yes:*:*:yes | yes:*:*:lto)
+    AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
+
+  *)
+    AC_MSG_ERROR([invalid option for --enable-pgo-build])
+    ;;
+esac
+
+if test "$enable_pgo_build" != "no"; then
+  AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
+  old_CFLAGS="$CFLAGS"
+  PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
+  CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
+		    [PGO_BUILD_GEN_CFLAGS=])
+  CFLAGS="$old_CFLAGS"
+  if test -n "$PGO_BUILD_GEN_CFLAGS"; then
+    AC_MSG_RESULT([yes])
+    PGO_BUILD_USE_CFLAGS="-fprofile-use"
+  else
+    AC_MSG_RESULT([no])
+    AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
+  fi
+
+  if test "$enable_pgo_build" = "lto"; then
+    AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
+    old_CFLAGS="$CFLAGS"
+    PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
+    CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
+    AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
+		      [PGO_BUILD_LTO_CFLAGS=])
+    CFLAGS="$old_CFLAGS"
+    if test -n "$PGO_BUILD_LTO_CFLAGS"; then
+      AC_MSG_RESULT([yes])
+    else
+      AC_MSG_RESULT([no])
+      AC_MSG_WARN([LTO is disabled for the PGO build])
+    fi
+  fi
+fi
+AC_SUBST(PGO_BUILD_GEN_CFLAGS)
+AC_SUBST(PGO_BUILD_USE_CFLAGS)
+AC_SUBST(PGO_BUILD_LTO_CFLAGS)
+
 # Used for setting $lt_cv_objdir
 _LT_CHECK_OBJDIR
 
@@ -2846,6 +2903,12 @@ extrasub_target="$extrasub_target
 /^@unless /d
 /^@endunless /d"
 
+if test "$enable_pgo_build" != "no"; then
+  extrasub_build="$extrasub_build
+/^@if pgo-build\$/d
+/^@endif pgo-build\$/d"
+fi
+
 # Create the serialization dependencies.  This uses a temporary file.
 
 AC_ARG_ENABLE([serial-configure],
@@ -3376,6 +3439,24 @@ AC_SUBST(CXX)
 AC_SUBST(CFLAGS)
 AC_SUBST(CXXFLAGS)
 
+GCC_PLUGIN_OPTION(PLUGIN_OPTION)
+AR_PLUGIN_OPTION=
+RANLIB_PLUGIN_OPTION=
+if test -n "$PLUGIN_OPTION"; then
+  if $AR --help 2>&1 | grep -q "\--plugin"; then
+    AR_PLUGIN_OPTION="$PLUGIN_OPTION"
+  fi
+  if $RANLIB --help 2>&1 | grep -q "\--plugin"; then
+    RANLIB_PLUGIN_OPTION="$PLUGIN_OPTION"
+  fi
+else
+  if test "$enable_pgo_build" != "no"; then
+    AC_MSG_ERROR([AR with --plugin and rc is required for LTO build])
+  fi
+fi
+AC_SUBST(AR_PLUGIN_OPTION)
+AC_SUBST(RANLIB_PLUGIN_OPTION)
+
 # Target tools.
 AC_ARG_WITH([build-time-tools], 
   [AS_HELP_STRING([--with-build-time-tools=PATH],