config.gcc (*-*-freebsd*): Enable creation of libgcc_s.so.

* config.gcc (*-*-freebsd*): Enable creation of libgcc_s.so.
	* config/t-slibgcc-elf-ver (SHLIB_LC): Add macro and use it.
	No functional change except ...
	* config/t-slibgcc-nolc-override (SHLIB_LC): Override it.  New file.
	* doc/install.texi (*-*-freebsd*): Document port configuration.

From-SVN: r51574

gcc/ChangeLog

@@ -1,3 +1,11 @@
+2002-03-29  Loren J. Rittle  <ljrittle@acm.org>
+
+	* config.gcc (*-*-freebsd*): Enable creation of libgcc_s.so.
+	* config/t-slibgcc-elf-ver (SHLIB_LC): Add macro and use it.
+	No functional change except ...
+	* config/t-slibgcc-nolc-override (SHLIB_LC): Override it.  New file.
+	* doc/install.texi (*-*-freebsd*): Document port configuration.
+
 2002-03-29  Neil Booth  <neil@daikokuya.demon.co.uk>
 
 	* Makefile.in (convert.o, calls.o, expmed.o): Update.

gcc/config.gcc

@@ -363,7 +363,7 @@ case $machine in
 	*-*-freebsd6 | *-*-freebsd[6].*) fbsd_tm_file="freebsd6.h";;
 	*) echo 'Please update *-*-freebsd* in gcc/config.gcc'; exit 1;;
 	esac
-	tmake_file=t-freebsd
+	tmake_file="t-slibgcc-elf-ver t-freebsd"
 	xmake_file=none
 	xm_defines=POSIX
 	case x${enable_threads} in
@@ -371,6 +371,12 @@ case $machine in
 	x | xyes | xpthreads | xposix)
 		thread_file='posix'
 		tmake_file="${tmake_file} t-freebsd-thread"
+		# Before 5.0, FreeBSD can't bind shared libraries to -lc
+		# when "optionally" threaded via weak pthread_* checks.
+		case $machine in
+		*-*-freebsd[34] | *-*-freebsd[34].*)
+			tmake_file="${tmake_file} t-slibgcc-nolc-override";;
+		esac
 		;;
 	*) echo 'Unknown thread configuration for FreeBSD'; exit 1;;
 	esac

gcc/config/t-slibgcc-elf-ver

@@ -6,11 +6,12 @@ SHLIB_NAME = @shlib_base_name@.so
 SHLIB_SONAME = @shlib_base_name@.so.1
 SHLIB_MAP = @shlib_map_file@
 SHLIB_OBJS = @shlib_objs@
+SHLIB_LC = -lc
 
 SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \
 	-Wl,--soname=$(SHLIB_SONAME) \
 	-Wl,--version-script=$(SHLIB_MAP) \
-	-o $(SHLIB_NAME) @multilib_flags@ $(SHLIB_OBJS) -lc && \
+	-o $(SHLIB_NAME) @multilib_flags@ $(SHLIB_OBJS) $(SHLIB_LC) && \
 	rm -f $(SHLIB_SONAME) && \
 	$(LN_S) $(SHLIB_NAME) $(SHLIB_SONAME)
 # $(slibdir) double quoted to protect it from expansion while building

gcc/config/t-slibgcc-nolc-override

@@ -0,0 +1 @@
+SHLIB_LC =

gcc/doc/install.texi

@@ -2079,6 +2079,8 @@ should properly complete the bootstrap).  Other CPU architectures
 supported by FreeBSD will require additional configuration tuning in, at
 the very least, both boehm-gc and libffi.
 
+Shared @file{libgcc_s.so} is now built and installed by default.
+
 @html
 </p>
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