[RS6000] linux startfile/endfile

These need to match the gnu-user.h definitions to support
--enable-default-pie.  Otherwise we end up linking the wrong startup
files when defaulting to PIE.

	PR target/81170
	PR target/81295
	* config/rs6000/sysv4.h (STARTFILE_LINUX_SPEC): Upgrade to
	match gnu-user.h startfile.
	(ENDFILE_LINUX_SPEC): Similarly.

From-SVN: r251065

gcc/ChangeLog

+2017-08-12  Alan Modra  <amodra@gmail.com>
+
+	PR target/81170
+	PR target/81295
+	* config/rs6000/sysv4.h (STARTFILE_LINUX_SPEC): Upgrade to
+	match gnu-user.h startfile.
+	(ENDFILE_LINUX_SPEC): Similarly.
+
 2017-08-11  Thomas Schwinge  <thomas@codesourcery.com>
 
 	PR lto/81430

gcc/config/rs6000/sysv4.h

@@ -757,24 +757,34 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN)
 #define CRTOFFLOADEND ""
 #endif
 
-#ifdef HAVE_LD_PIE
-#define	STARTFILE_LINUX_SPEC "\
-%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \
-%{mnewlib:ecrti.o%s;:crti.o%s} \
-%{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s} \
-" CRTOFFLOADBEGIN
-#else
-#define	STARTFILE_LINUX_SPEC "\
-%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
-%{mnewlib:ecrti.o%s;:crti.o%s} \
-%{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s} \
-" CRTOFFLOADBEGIN
-#endif
-
-#define	ENDFILE_LINUX_SPEC "\
-%{shared|pie:crtendS.o%s;:crtend.o%s} \
-%{mnewlib:ecrtn.o%s;:crtn.o%s} \
-" CRTOFFLOADEND
+/* STARTFILE_LINUX_SPEC should be the same as GNU_USER_TARGET_STARTFILE_SPEC
+   but with the mnewlib ecrti.o%s selection substituted for crti.o%s.  */
+#define	STARTFILE_LINUX_SPEC \
+  "%{shared:; \
+     pg|p|profile:gcrt1.o%s; \
+     static:crt1.o%s; \
+     " PIE_SPEC ":Scrt1.o%s; \
+     :crt1.o%s} \
+   %{mnewlib:ecrti.o%s;:crti.o%s} \
+   %{static:crtbeginT.o%s; \
+     shared|" PIE_SPEC ":crtbeginS.o%s; \
+     :crtbegin.o%s} \
+   %{fvtable-verify=none:%s; \
+     fvtable-verify=preinit:vtv_start_preinit.o%s; \
+     fvtable-verify=std:vtv_start.o%s} \
+   " CRTOFFLOADBEGIN
+
+/* ENDFILE_LINUX_SPEC should be the same as GNU_USER_TARGET_ENDFILE_SPEC
+   but with the mnewlib ecrtn.o%s selection substituted for crtn.o%s.  */
+#define ENDFILE_LINUX_SPEC \
+  "%{fvtable-verify=none:%s; \
+     fvtable-verify=preinit:vtv_end_preinit.o%s; \
+     fvtable-verify=std:vtv_end.o%s} \
+   %{static:crtend.o%s; \
+     shared|" PIE_SPEC ":crtendS.o%s; \
+     :crtend.o%s} \
+   %{mnewlib:ecrtn.o%s;:crtn.o%s} \
+   " CRTOFFLOADEND
 
 #define LINK_START_LINUX_SPEC ""