Add --enable-default-pie option to GCC configure

Add --enable-default-pie option to configure GCC to generate PIE by
default.

gcc/

	* Makefile.in (COMPILER): Add @NO_PIE_CFLAGS@.
	(BUILD_CFLAGS): Likewise.
	(BUILD_CXXFLAGS): Likewise.
	(LINKER): Add @NO_PIE_FLAG@.
	(BUILD_LDFLAGS): Likewise.
	(libgcc.mvars): Set NO_PIE_CFLAGS to -fno-PIE for
	--enable-default-pie.
	* common.opt (fPIE): Initialize to -1.
	(fpie): Likewise.
	(no-pie): New option.
	(pie): Replace "Negative(shared)" with "Negative(no-pie)".
	* configure.ac: Add --enable-default-pie.
	(NO_PIE_CFLAGS): New.  Check if -fno-PIE works.  AC_SUBST.
	(NO_PIE_FLAG): New.  Check if -no-pie works.  AC_SUBST.
	* defaults.h (DEFAULT_FLAG_PIE): New.  Default PIE to -fPIE.
	* gcc.c (NO_PIE_SPEC): New.
	(PIE_SPEC): Likewise.
	(NO_FPIE1_SPEC): Likewise.
	(FPIE1_SPEC): Likewise.
	(NO_FPIE2_SPEC): Likewise.
	(FPIE2_SPEC): Likewise.
	(NO_FPIE2_SPEC): Likewise.
	(FPIE_SPEC): Likewise.
	(NO_FPIE_SPEC): Likewise.
	(NO_FPIC1_SPEC): Likewise.
	(FPIC1_SPEC): Likewise.
	(NO_FPIC2_SPEC): Likewise.
	(FPIC2_SPEC): Likewise.
	(NO_FPIC2_SPEC): Likewise.
	(FPIC_SPEC): Likewise.
	(NO_FPIC_SPEC): Likewise.
	(NO_FPIE1_AND_FPIC1_SPEC): Likewise.
	(FPIE1_OR_FPIC1_SPEC): Likewise.
	(NO_FPIE2_AND_FPIC2_SPEC): Likewise.
	(FPIE2_OR_FPIC2_SPEC): Likewise.
	(NO_FPIE_AND_FPIC_SPEC): Likewise.
	(FPIE_OR_FPIC_SPEC): Likewise.
	(LD_PIE_SPEC): Likewise.
	(LINK_PIE_SPEC): Handle -no-pie.  Use PIE_SPEC and LD_PIE_SPEC.
	* opts.c (finish_options): Update opts->x_flag_pie if it is -1.
	* config/darwin.h (PIE_SPEC): Renamed to ...
	(DARWIN_PIE_SPEC): This.
	(LINK_SPEC): Replace PIE_SPEC with DARWIN_PIE_SPEC.
	* config/darwin9.h (PIE_SPEC): Renamed to ...
	(DARWIN_PIE_SPEC): This.
	* config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Use
	PIE_SPEC and NO_PIE_SPEC if HAVE_LD_PIE is defined.
	* config/openbsd.h (ASM_SPEC): Use FPIE1_OR_FPIC1_SPEC and
	FPIE2_OR_FPIC2_SPEC.
	* config/m68k/netbsd-elf.h (ASM_SPEC): Likewise.
	* config/m68k/openbsd.h (ASM_SPEC): Likewise.
	* gcc/config/sol2.h (ASM_PIC_SPEC): Likewise.
	* config/arm/freebsd.h (SUBTARGET_EXTRA_ASM_SPEC): Likewise.
	* config/arm/netbsd-elf.h (SUBTARGET_EXTRA_ASM_SPEC): Likewise.
	* config/arm/semi.h (SUBTARGET_EXTRA_ASM_SPEC): Likewise.
	* config/cris/linux.h (CRIS_ASM_SUBTARGET_SPEC): Likewise.
	* config/m32r/m32r.h (ASM_SPEC): Likewise.
	* config/m68k/uclinux.h (DRIVER_SELF_SPECS): Likewise.
	* config/rs6000/linux64.h (ASM_SPEC32): Likewise.
	* config/rs6000/sysv4.h (ASM_SPEC): Likewise.
	* config/sparc/freebsd.h (ASM_SPEC): Likewise.
	* config/sparc/linux.h (ASM_SPEC): Likewise.
	* config/sparc/linux64.h (ASM_SPEC): Likewise.
	* config/sparc/netbsd-elf.h (ASM_SPEC): Likewise.
	* config/sparc/openbsd64.h (ASM_SPEC): Likewise.
	* config/sparc/sp-elf.h (ASM_SPEC): Likewise.
	* config/sparc/sp64-elf.h (ASM_SPEC): Likewise.
	* config/sparc/sparc.h (ASM_SPEC): Likewise.
	* config/sparc/sysv4.h (ASM_SPEC): Likewise.
	* config/sparc/vxworks.h (ASM_SPEC): Likewise.
	* config/c6x/elf-common.h (ASM_SPEC): Use NO_FPIC2_SPEC,
	FPIC2_SPEC, FPIC1_SPEC and FPIC2_SPEC.
	* config/c6x/uclinux-elf.h (LINK_SPEC): Use FPIE_SPEC.
	* config/frv/frv.h (DRIVER_SELF_SPECS): Use FPIC_SPEC,
	NO_FPIC_SPEC and NO_FPIE1_AND_FPIC1_SPEC.
	(ASM_SPEC): Use FPIE1_OR_FPIC1_SPEC and FPIE2_OR_FPIC2_SPEC.
	* config/m68k/m68k.h (ASM_PCREL_SPEC): Use FPIC_SPEC and
	NO_FPIC_SPEC.
	* config/mips/gnu-user.h (NO_SHARED_SPECS): Use
	NO_FPIE_AND_FPIC_SPEC.
	* config/mips/vxworks.h (SUBTARGET_ASM_SPEC): Use FPIC_SPEC.
	* config/rs6000/freebsd64.h (ASM_SPEC32): Likewise.
	* config/rs6000/vxworks.h (ASM_SPEC): Likewise.
	* config/vax/linux.h (ASM_SPEC): Likewise.
	* doc/install.texi: Document --enable-default-pie.
	* doc/invoke.texi: Document -no-pie.
	* config.in: Regenerated.
	* configure: Likewise.

gcc/ada/

	* gcc-interface/Makefile.in (TOOLS_LIBS): Add @NO_PIE_FLAG@.

libgcc/

	* Makefile.in (CRTSTUFF_CFLAGS): Add $(NO_PIE_CFLAGS).

From-SVN: r223796

2 files changed, 5 insertions, 1 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index fb4d2ba..b4fc479d 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,7 @@
+2015-05-27  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* Makefile.in (CRTSTUFF_CFLAGS): Add $(NO_PIE_CFLAGS).
+
 2015-05-27  John Marino <gnugcc@marino.st>
 
 	* config.host (i[34567]86-*-freebsd*, x86_64-*-freebsd*): Set
diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index 1f2b806..527d87b 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -285,7 +285,7 @@ INTERNAL_CFLAGS = $(CFLAGS) $(LIBGCC2_CFLAGS) $(HOST_LIBGCC2_CFLAGS) \
 
 # Options to use when compiling crtbegin/end.
 CRTSTUFF_CFLAGS = -O2 $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -g0 \
-  -finhibit-size-directive -fno-inline -fno-exceptions \
+  $(NO_PIE_CFLAGS) -finhibit-size-directive -fno-inline -fno-exceptions \
   -fno-zero-initialized-in-bss -fno-toplevel-reorder -fno-tree-vectorize \
   -fbuilding-libgcc -fno-stack-protector $(FORCE_EXPLICIT_EH_REGISTRY) \
   $(INHIBIT_LIBC_CFLAGS)