unwind-dw2-fde-glibc.c: Define and use USE_PT_GNU_EH_FRAME.

2009-09-22  Loren J. Rittle  <ljrittle@acm.org>

	* unwind-dw2-fde-glibc.c: Define and use USE_PT_GNU_EH_FRAME.
	Enable a new case for __FreeBSD__ >= 7.
	* crtstuff.c:  Define USE_PT_GNU_EH_FRAME for __FreeBSD__ >= 7.
	* config/t-freebsd: Define LIB2ADDEH and LIB2ADDEHDEP.
	* config/freebsd-spec.h: Conditionally define LINK_EH_SPEC
	and USE_LD_AS_NEEDED.

From-SVN: r152027

gcc/ChangeLog

+2009-09-22  Loren J. Rittle  <ljrittle@acm.org>
+
+	* unwind-dw2-fde-glibc.c: Define and use USE_PT_GNU_EH_FRAME.
+	Enable a new case for __FreeBSD__ >= 7.
+	* crtstuff.c:  Define USE_PT_GNU_EH_FRAME for __FreeBSD__ >= 7.
+	* config/t-freebsd: Define LIB2ADDEH and LIB2ADDEHDEP.
+	* config/freebsd-spec.h: Conditionally define LINK_EH_SPEC
+	and USE_LD_AS_NEEDED.
+
 2009-09-22  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/41395

gcc/config/freebsd-spec.h

@@ -148,3 +148,12 @@ is built with the --enable-threads configure-time option.}		\
 #else
 #define FBSD_DYNAMIC_LINKER "/libexec/ld-elf.so.1"
 #endif
+
+#if defined(HAVE_LD_EH_FRAME_HDR)
+#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
+#endif
+
+/* Use --as-needed -lgcc_s for eh support.  */
+#ifdef HAVE_LD_AS_NEEDED
+#define USE_LD_AS_NEEDED 1
+#endif

gcc/config/t-freebsd

@@ -3,3 +3,8 @@ CRTSTUFF_T_CFLAGS_S = $(CRTSTUFF_T_CFLAGS) -fPIC
 
 # Compile libgcc.a with pic.
 TARGET_LIBGCC2_CFLAGS += -fPIC
+
+# Use unwind-dw2-fde-glibc
+LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-glibc.c \
+  $(srcdir)/unwind-sjlj.c $(srcdir)/gthr-gnat.c $(srcdir)/unwind-c.c
+LIB2ADDEHDEP = unwind.inc unwind-dw2-fde.h unwind-dw2-fde.c

gcc/crtstuff.c

@@ -83,6 +83,15 @@ call_ ## FUNC (void)					\
     && !defined(OBJECT_FORMAT_FLAT) \
     && defined(HAVE_LD_EH_FRAME_HDR) \
     && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
+    && defined(__FreeBSD__) && __FreeBSD__ >= 7
+#include <link.h>
+# define USE_PT_GNU_EH_FRAME
+#endif
+
+#if defined(OBJECT_FORMAT_ELF) \
+    && !defined(OBJECT_FORMAT_FLAT) \
+    && defined(HAVE_LD_EH_FRAME_HDR) \
+    && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
     && defined(__GLIBC__) && __GLIBC__ >= 2
 #include <link.h>
 /* uClibc pretends to be glibc 2.2 and DT_CONFIG is defined in its link.h.

gcc/unwind-dw2-fde-glibc.c

@@ -48,6 +48,16 @@
 #if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
     && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
 	|| (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
+# define USE_PT_GNU_EH_FRAME
+#endif
+
+#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
+    && defined(__FreeBSD__) && __FreeBSD__ >= 7
+# define ElfW __ElfN
+# define USE_PT_GNU_EH_FRAME
+#endif
+
+#if defined(USE_PT_GNU_EH_FRAME)
 
 #ifndef __RELOC_POINTER
 # define __RELOC_POINTER(ptr, base) ((ptr) + (base))