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

1 files changed, 47 insertions, 2 deletions

diff --git a/gcc/gcc.c b/gcc/gcc.c
index 8f01e42..a8e9c8c 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -737,12 +737,57 @@ proper position among the other output files.  */
 #endif
 #endif
 
+#ifdef ENABLE_DEFAULT_PIE
+#define NO_PIE_SPEC		"no-pie|static"
+#define PIE_SPEC		NO_PIE_SPEC "|r|shared:;"
+#define NO_FPIE1_SPEC		"fno-pie"
+#define FPIE1_SPEC		NO_FPIE1_SPEC ":;"
+#define NO_FPIE2_SPEC		"fno-PIE"
+#define FPIE2_SPEC		NO_FPIE2_SPEC ":;"
+#define NO_FPIE_SPEC		NO_FPIE1_SPEC "|" NO_FPIE2_SPEC
+#define FPIE_SPEC		NO_FPIE_SPEC ":;"
+#define NO_FPIC1_SPEC		"fno-pic"
+#define FPIC1_SPEC		NO_FPIC1_SPEC ":;"
+#define NO_FPIC2_SPEC		"fno-PIC"
+#define FPIC2_SPEC		NO_FPIC2_SPEC ":;"
+#define NO_FPIC_SPEC		NO_FPIC1_SPEC "|" NO_FPIC2_SPEC
+#define FPIC_SPEC		NO_FPIC_SPEC ":;"
+#define NO_FPIE1_AND_FPIC1_SPEC	NO_FPIE1_SPEC "|" NO_FPIC1_SPEC
+#define FPIE1_OR_FPIC1_SPEC	NO_FPIE1_AND_FPIC1_SPEC ":;"
+#define NO_FPIE2_AND_FPIC2_SPEC	NO_FPIE2_SPEC "|" NO_FPIC2_SPEC
+#define FPIE2_OR_FPIC2_SPEC	NO_FPIE2_AND_FPIC2_SPEC ":;"
+#define NO_FPIE_AND_FPIC_SPEC	NO_FPIE_SPEC "|" NO_FPIC_SPEC
+#define FPIE_OR_FPIC_SPEC	NO_FPIE_AND_FPIC_SPEC ":;"
+#else
+#define PIE_SPEC		"pie"
+#define NO_PIE_SPEC		PIE_SPEC "|r|shared:;"
+#define FPIE1_SPEC		"fpie"
+#define NO_FPIE1_SPEC		FPIE1_SPEC ":;"
+#define FPIE2_SPEC		"fPIE"
+#define NO_FPIE2_SPEC		FPIE2_SPEC ":;"
+#define FPIE_SPEC		FPIE1_SPEC "|" FPIE2_SPEC
+#define NO_FPIE_SPEC		FPIE_SPEC ":;"
+#define FPIC1_SPEC		"fpic"
+#define NO_FPIC1_SPEC		FPIC1_SPEC ":;"
+#define FPIC2_SPEC		"fPIC"
+#define NO_FPIC2_SPEC		FPIC2_SPEC ":;"
+#define FPIC_SPEC		FPIC1_SPEC "|" FPIC2_SPEC
+#define NO_FPIC_SPEC		FPIC_SPEC ":;"
+#define FPIE1_OR_FPIC1_SPEC	FPIE1_SPEC "|" FPIC1_SPEC
+#define NO_FPIE1_AND_FPIC1_SPEC	FPIE1_OR_FPIC1_SPEC ":;"
+#define FPIE2_OR_FPIC2_SPEC	FPIE2_SPEC "|" FPIC2_SPEC
+#define NO_FPIE2_AND_FPIC2_SPEC	FPIE1_OR_FPIC2_SPEC ":;"
+#define FPIE_OR_FPIC_SPEC	FPIE_SPEC "|" FPIC_SPEC
+#define NO_FPIE_AND_FPIC_SPEC	FPIE_OR_FPIC_SPEC ":;"
+#endif
+
 #ifndef LINK_PIE_SPEC
 #ifdef HAVE_LD_PIE
-#define LINK_PIE_SPEC "%{pie:-pie} "
+#define LD_PIE_SPEC "-pie"
 #else
-#define LINK_PIE_SPEC "%{pie:} "
+#define LD_PIE_SPEC ""
 #endif
+#define LINK_PIE_SPEC "%{no-pie:} " "%{" PIE_SPEC ":" LD_PIE_SPEC "} "
 #endif
 
 #ifndef LINK_BUILDID_SPEC