gcc.c (init_gcc_specs): If HAVE_LD_AS_NEEDED, link with -lgcc --as-ne…

…eded -lgcc_s --no-as-needed by default.

	* gcc.c (init_gcc_specs): If HAVE_LD_AS_NEEDED, link with
	-lgcc --as-needed -lgcc_s --no-as-needed by default.
	* configure.ac (HAVE_LD_AS_NEEDED): Check for ld --as-needed.
	* configure: Rebuilt.
	* config.in: Rebuilt.
	* Makefile.in (stage1-start): Copy also libgcc_s*$(SHLIB_EXT).
	(stage2-start, stage3-start, stage4-start): Likewise.
	(stageprofile-start, stagefeedback-start): Likewise.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r80302

gcc/ChangeLog

@@ -1,3 +1,15 @@
+2004-04-01  Alan Modra  <amodra@bigpond.net.au>
+	    Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.c (init_gcc_specs): If HAVE_LD_AS_NEEDED, link with
+	-lgcc --as-needed -lgcc_s --no-as-needed by default.
+	* configure.ac (HAVE_LD_AS_NEEDED): Check for ld --as-needed.
+	* configure: Rebuilt.
+	* config.in: Rebuilt.
+	* Makefile.in (stage1-start): Copy also libgcc_s*$(SHLIB_EXT).
+	(stage2-start, stage3-start, stage4-start): Likewise.
+	(stageprofile-start, stagefeedback-start): Likewise.
+
 2004-04-01  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/sparc/sparc.h (DITF_CONVERSION_LIBFUNCS): Define to 0.

gcc/Makefile.in

@@ -3639,13 +3639,15 @@ stage1-start:
 	-if [ -f ld$(exeext) ] ; then (cd stage1 && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stage1 && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
 	-rm -f stage1/libgcc.a stage1/libgcc_eh.a stage1/libgcov.a
+	-rm -f stage1/libgcc_s*$(SHLIB_EXT)
 	-cp libgcc.a stage1
 	-$(RANLIB_FOR_TARGET) stage1/libgcc.a
 	-cp libgcov.a stage1
 	-$(RANLIB_FOR_TARGET) stage1/libgcov.a
 	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stage1; \
 	   $(RANLIB_FOR_TARGET) stage1/libgcc_eh.a; \
 	fi
+	-cp libgcc_s*$(SHLIB_EXT) stage1
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stage1/$${f} . ; \
 	else true; \
@@ -3672,13 +3674,15 @@ stage2-start:
 	-if [ -f ld$(exeext) ] ; then (cd stage2 && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stage2 && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
 	-rm -f stage2/libgcc.a stage2/libgcov.a stage2/libgcc_eh.a
+	-rm -f stage2/libgcc_s*$(SHLIB_EXT)
 	-cp libgcc.a stage2
 	-$(RANLIB_FOR_TARGET) stage2/libgcc.a
 	-cp libgcov.a stage2
 	-$(RANLIB_FOR_TARGET) stage2/libgcov.a
 	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stage2; \
 	   $(RANLIB_FOR_TARGET) stage2/libgcc_eh.a; \
 	fi
+	-cp libgcc_s*$(SHLIB_EXT) stage2
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stage2/$${f} . ; \
 	else true; \
@@ -3701,13 +3705,15 @@ stage3-start:
 	-if [ -f ld$(exeext) ] ; then (cd stage3 && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stage3 && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
 	-rm -f stage3/libgcc.a stage3/libgcov.a stage3/libgcc_eh.a
+	-rm -f stage3/libgcc_s*$(SHLIB_EXT)
 	-cp libgcc.a stage3
 	-$(RANLIB_FOR_TARGET) stage3/libgcc.a
 	-cp libgcov.a stage3
 	-$(RANLIB_FOR_TARGET) stage3/libgcov.a
 	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stage3; \
 	   $(RANLIB_FOR_TARGET) stage3/libgcc_eh.a; \
 	fi
+	-cp libgcc_s*$(SHLIB_EXT) stage3
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stage3/$${f} . ; \
 	else true; \
@@ -3730,13 +3736,15 @@ stage4-start:
 	-if [ -f ld$(exeext) ] ; then (cd stage4 && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stage4 && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
 	-rm -f stage4/libgcc.a stage4/libgcov.a stage4/libgcc_eh.a
+	-rm -f stage4/libgcc_s*$(SHLIB_EXT)
 	-cp libgcc.a stage4
 	-$(RANLIB_FOR_TARGET) stage4/libgcc.a
 	-cp libgcov.a stage4
 	-$(RANLIB_FOR_TARGET) stage4/libgcov.a
 	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stage4; \
 	   $(RANLIB_FOR_TARGET) stage4/libgcc_eh.a; \
 	fi
+	-cp libgcc_s*$(SHLIB_EXT) stage4
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stage4/$${f} . ; \
 	else true; \
@@ -3757,13 +3765,15 @@ stageprofile-start:
 	-if [ -f ld$(exeext) ] ; then (cd stageprofile && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stageprofile && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
 	-rm -f stageprofile/libgcc.a stageprofile/libgcov.a stageprofile/libgcc_eh.a
+	-rm -f stageprofile/libgcc_s*$(SHLIB_EXT)
 	-cp libgcc.a stageprofile
 	-$(RANLIB_FOR_TARGET) stageprofile/libgcc.a
 	-cp libgcov.a stageprofile
 	-$(RANLIB_FOR_TARGET) stageprofile/libgcov.a
 	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stageprofile; \
 	   $(RANLIB_FOR_TARGET) stageprofile/libgcc_eh.a; \
 	fi
+	-cp libgcc_s*$(SHLIB_EXT) stageprofile
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stageprofile/$${f} . ; \
 	else true; \
@@ -3784,6 +3794,7 @@ stagefeedback-start:
 	-if [ -f ld$(exeext) ] ; then (cd stagefeedback && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stagefeedback && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
 	-rm -f stagefeedback/libgcc.a stagefeedback/libgcov.a stagefeedback/libgcc_eh.a
+	-rm -f stagefeedback/libgcc_s*$(SHLIB_EXT)
 	-rm -f *.da
 	-for dir in fixinc po testsuite $(SUBDIRS); \
 	 do \
@@ -3796,6 +3807,7 @@ stagefeedback-start:
 	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stagefeedback; \
 	   $(RANLIB_FOR_TARGET) stagefeedback/libgcc_eh.a; \
 	fi
+	-cp libgcc_s*$(SHLIB_EXT) stagefeedback
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stagefeedback/$${f} . ; \
 	else true; \

gcc/config.in

@@ -306,6 +306,9 @@
 /* Define to 1 if you have the <ldfcn.h> header file. */
 #undef HAVE_LDFCN_H
 
+/* Define if your linker supports --as-needed and --no-as-needed options. */
+#undef HAVE_LD_AS_NEEDED
+
 /* Define if your linker supports --eh-frame-hdr option. */
 #undef HAVE_LD_EH_FRAME_HDR
 

gcc/configure

@@ -11916,6 +11916,30 @@ echo "${ECHO_T}$gcc_cv_ld_pie" >&6
 # UNSORTED
 # --------
 
+echo "$as_me:$LINENO: checking linker --as-needed support" >&5
+echo $ECHO_N "checking linker --as-needed support... $ECHO_C" >&6
+gcc_cv_ld_as_needed=no
+if test $in_tree_ld = yes ; then
+  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
+     && test $in_tree_ld_is_elf = yes; then
+    gcc_cv_ld_as_needed=yes
+  fi
+elif test x$gcc_cv_ld != x; then
+	# Check if linker supports --as-needed and --no-as-needed options
+	if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
+		gcc_cv_ld_as_needed=yes
+	fi
+fi
+if test x"$gcc_cv_ld_as_needed" = xyes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_LD_AS_NEEDED 1
+_ACEOF
+
+fi
+echo "$as_me:$LINENO: result: $gcc_cv_ld_as_needed" >&5
+echo "${ECHO_T}$gcc_cv_ld_as_needed" >&6
+
 if test x$with_sysroot = x && test x$host = x$target \
    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" ; then
 

gcc/configure.ac

@@ -2744,6 +2744,25 @@ AC_MSG_RESULT($gcc_cv_ld_pie)
 # UNSORTED
 # --------
 
+AC_MSG_CHECKING(linker --as-needed support)
+gcc_cv_ld_as_needed=no
+if test $in_tree_ld = yes ; then
+  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
+     && test $in_tree_ld_is_elf = yes; then
+    gcc_cv_ld_as_needed=yes
+  fi
+elif test x$gcc_cv_ld != x; then
+	# Check if linker supports --as-needed and --no-as-needed options
+	if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
+		gcc_cv_ld_as_needed=yes
+	fi
+fi
+if test x"$gcc_cv_ld_as_needed" = xyes; then
+	AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
+[Define if your linker supports --as-needed and --no-as-needed options.])
+fi
+AC_MSG_RESULT($gcc_cv_ld_as_needed)
+
 if test x$with_sysroot = x && test x$host = x$target \
    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" ; then
   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",

gcc/gcc.c

@@ -1533,6 +1533,12 @@ init_gcc_specs (struct obstack *obstack, const char *shared_name,
 
   buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name,
 		"}%{!static:%{!static-libgcc:",
+#ifdef HAVE_LD_AS_NEEDED
+		"%{!shared-libgcc:", static_name,
+		" --as-needed ", shared_name, " --no-as-needed}"
+		"%{shared-libgcc:", shared_name, "%{!shared: ", static_name,
+		"}",
+#else
 		"%{!shared:%{!shared-libgcc:", static_name, " ",
 		eh_name, "}%{shared-libgcc:", shared_name, " ",
 		static_name, "}}%{shared:",
@@ -1541,6 +1547,7 @@ init_gcc_specs (struct obstack *obstack, const char *shared_name,
 		"}%{!shared-libgcc:", static_name, "}",
 #else
 		shared_name,
+#endif
 #endif
 		"}}}", NULL);