path: root/gcc-4.7.0/piepatch/01_all_gcc47_configure.patch

2012-04-06	Magnus Granberg		<zorry@gentoo.org>

		* configure		Add --enable-esp.  Add-fno-stack-protector
		to stage1_cflags.
		* gcc/configure		Add --enable-esp and check if SSP works.
		Define ENABLE_ESP ENABLE_ESP_SSP.
		Check if we support crtbeginP and define ENABLE_CRTBEGINP.

--- a/configure	2011-12-22 21:51:34.700589641 +0100
+++ b/configure	2011-12-22 22:17:32.855636066 +0100
@@ -671,6 +671,7 @@ LDFLAGS
 CFLAGS
 CC
 EXTRA_CONFIGARGS_LIBJAVA
+enable_esp
 target_subdir
 host_subdir
 build_subdir
@@ -749,6 +750,7 @@ enable_ld
 enable_libquadmath
 enable_libquadmath_support
 enable_libada
+enable_esp
 enable_libssp
 enable_static_libjava
 enable_bootstrap
@@ -1467,6 +1469,11 @@ Optional Features:
   --disable-libquadmath-support
                           disable libquadmath support for Fortran
   --enable-libada         build libada directory
+  --enable-esp           Enable Stack protector, Position independent
+                          executable as default if we have suppot for it when
+                          compiling and link with -z relro and -z now as
+                          default. Linux targets supported i*86, x86_64,
+                          x86_x32, powerpc, powerpc64, ia64 and arm.
   --enable-libssp         build libssp directory
   --enable-static-libjava[=ARG]
                           build static libjava [default=no]
@@ -2985,6 +2992,24 @@ if test "${ENABLE_LIBADA}" != "yes" ; th
   noconfigdirs="$noconfigdirs gnattools"
 fi
 
+# Check whether --enable-esp was given and target have the support.
+# Check whether --enable-esp was given.
+if test "${enable_esp+set}" = set; then :
+  enableval=$enable_esp;
+  case $target in
+    i?86*-*-linux* | x86_??*-*-linux* | powerpc-*-linux* | powerpc64-*-linux* | arm*-*-linux* | ia64-*-linux*)
+      enable_esp=yes
+      ;;
+    *)
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: *** --enable-esp is not supported on this $target target." >&5
+$as_echo "$as_me: WARNING: *** --enable-esp is not supported on this $target target." >&2;}
+      ;;
+  esac
+
+fi
+
+
+
 # Check whether --enable-libssp was given.
 if test "${enable_libssp+set}" = set; then :
   enableval=$enable_libssp; ENABLE_LIBSSP=$enableval
@@ -14418,6 +14445,11 @@ rm -f core conftest.err conftest.$ac_obj
   CFLAGS="$saved_CFLAGS"
 fi
 
+# Disable -fstack-protector on stage1
+if test x$enable_esp = xyes; then
+  stage1_cflags="$stage1_cflags -fno-stack-protector"
+fi
+
 
 
 # Enable --enable-checking in stage1 of the compiler.
--- a/gcc/configure	2011-12-31 12:45:24.449810238 +0100
+++ b/gcc/configure	2011-12-31 00:43:40.000000000 +0100
@@ -600,6 +600,8 @@ ac_includes_default="\
 
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
+enable_esp
+enable_crtbeginP
 enable_plugin
 pluginlibs
 CLOOGINC
@@ -916,6 +917,7 @@ enable_version_specific_runtime_libs
 enable_plugin
 enable_libquadmath_support
 with_linker_hash_style
+enable_esp
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1629,6 +1631,11 @@ Optional Features:
   --enable-plugin         enable plugin support
   --disable-libquadmath-support
                           disable libquadmath support for Fortran
+  --enable-esp            Enable Stack protector, Position independent
+                          executable and Fortify_sources as default if we have
+                          suppot for it when compiling and link -z now as
+                          default. Linux targets supported i*86, x86_64,
+                          x86_x32, powerpc, powerpc64, ia64, mips and arm
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -27290,6 +27411,113 @@ _ACEOF
 
 fi
 
+# --------------
+# Esp checks
+# --------------
+
+# Check whether --enable-esp was given and target have the support.
+# Check whether --enable-esp was given.
+if test "${enable_esp+set}" = set; then :
+  enableval=$enable_esp; set_enable_esp=$enableval
+else
+  set_enable_esp=no
+fi
+
+if test $set_enable_esp = yes ; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $target support esp" >&5
+$as_echo_n "checking if $target support esp... " >&6; }
+if test $set_enable_esp = yes ; then
+  case "$target" in
+    i?86*-*-linux* | x86_??*-*-linux* | powerpc-*-linux* | powerpc64-*-linux* | arm*-*-linux* | ia64-*-linux* | mips*-*-linux*)
+      enable_esp=yes
+
+$as_echo "#define ENABLE_ESP 1" >>confdefs.h
+
+      ;;
+    *)
+      enable_esp=no
+      ;;
+  esac
+else
+ enable_esp=no
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_esp" >&5
+$as_echo "$enable_esp" >&6; }
+fi
+
+if test $enable_esp = yes ; then
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can default to use -fstack-protector" >&5
+$as_echo_n "checking if we can default to use -fstack-protector... " >&6; }
+  ssp_link_test=no
+  if test x$gcc_cv_libc_provides_ssp = xyes && test x$set_have_as_tls = xyes; then
+    if $EGREP '^ 	*#[ 	]*define[ 	]+__UCLIBC__[ 	]+1' \
+       $target_header_dir/features.h > /dev/null; then
+      if test -f $target_header_dir/bits/uClibc_config.h && \
+	 $EGREP '^ 	*#[ 	]*define[ 	]+__UCLIBC_SUBLEVEL__[ 	]+([3-9][2-9]|[4-9][0-9])' \
+	 $target_header_dir/bits/uClibc_config.h > /dev/null && \
+	 $EGREP '^ 	*#[ 	]*define[ 	]+__UCLIBC_HAS_TLS__[ 	]+1' \
+	 $target_header_dir/bits/uClibc_config.h > /dev/null; then
+	ssp_link_test=yes
+      fi
+    else
+      ssp_link_test=yes
+    fi
+  fi
+  if test x$ssp_link_test=xyes ; then
+    saved_CFLAGS="$CFLAGS"
+    CFLAGS="$CFLAGS -O2 -fstack-protector -Werror"
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; enable_esp_ssp=yes
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }; enable_esp_ssp=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+    CFLAGS="$saved_CFLAGS"
+  else
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+    enable_esp_ssp=no
+  fi
+  if test $enable_esp_ssp = yes ; then
+
+$as_echo "#define ENABLE_ESP_SSP 1" >>confdefs.h
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking checking for crtbeginP.o support" >&5
+$as_echo_n "checking checking for crtbeginP.o support... " >&6; }
+      case "$target" in
+	ia64*-*-linux*)
+          enable_crtbeginP=no ;;
+        *-*-linux*)
+          if test x$gcc_cv_ld_pie = xyes && test x$lt_cv_prog_compiler_static_works = xyes; then
+            enable_crtbeginP=yes
+
+$as_echo "#define ENABLE_CRTBEGINP 1" >>confdefs.h
+
+     	  fi
+          ;;
+  	*) enable_crtbeginP=no ;;
+      esac
+    fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_crtbeginP" >&5
+$as_echo "$enable_crtbeginP" >&6; }
+
+fi
+
 # Configure the subdirectories
 # AC_CONFIG_SUBDIRS($subdirs)