configure.in (enable-shared): New.

        * configure.in (enable-shared): New.
        * Makefile.in (LIBGCC_DEPS): Depend on EXTRA_PARTS as well.
        (libgcc.mk): Pass SHLIB_LINK, SHLIB_LIBS, SHLIB_MULTILIB to mklibgcc.
        * mklibgcc.in: Use them to link shared a libgcc.
        * config/t-linux (SHLIB_LINK, SHLIB_LIBS): New.
        * config/alpha/t-ieee (SHLIB_MULTILIB): New.
        * config/mips/t-iris6 (SHLIB_LINK, SHLIB_LIBS): New.
        * config/sparc/t-sol2 (SHLIB_LINK, SHLIB_LIBS): New.

        * configure.in (alpha-osf*): Use t-osf and x-osf.
        * config/alpha/t-osf: New file.
        * config/alpha/t-osf4: New file.
        * config/alpha/x-osf: New file.
        * config/alpha/x-alpha: Remove file.

From-SVN: r36715

gcc/ChangeLog

+2000-10-04  Richard Henderson  <rth@cygnus.com>
+
+	* configure.in (enable-shared): New.
+	* Makefile.in (LIBGCC_DEPS): Depend on EXTRA_PARTS as well.
+	(libgcc.mk): Pass SHLIB_LINK, SHLIB_LIBS, SHLIB_MULTILIB to mklibgcc.
+	* mklibgcc.in: Use them to link shared a libgcc.
+	* config/t-linux (SHLIB_LINK, SHLIB_LIBS): New.
+	* config/alpha/t-ieee (SHLIB_MULTILIB): New.
+	* config/mips/t-iris6 (SHLIB_LINK, SHLIB_LIBS): New.
+	* config/sparc/t-sol2 (SHLIB_LINK, SHLIB_LIBS): New.
+
+	* configure.in (alpha-osf*): Use t-osf and x-osf.
+	* config/alpha/t-osf: New file.
+	* config/alpha/t-osf4: New file.
+	* config/alpha/x-osf: New file.
+	* config/alpha/x-alpha: Remove file.
+
 2000-10-04  Will Cohen  <wcohen@redhat.com>
 
 	* c-typeck.c (process_init_element): Added warning for zero-length

gcc/Makefile.in

@@ -969,6 +969,9 @@ libgcc.mk: config.status Makefile mklibgcc $(LIB2ADD) xgcc$(exeext)
 	DPBIT_FUNCS='$(DPBIT_FUNCS)' \
 	MULTILIBS=`$(GCC_FOR_TARGET) --print-multi-lib` \
 	EXTRA_MULTILIB_PARTS='$(EXTRA_MULTILIB_PARTS)' \
+	SHLIB_LINK='$(SHLIB_LINK)' \
+	SHLIB_LIBS='$(SHLIB_LIBS)' \
+	SHLIB_MULTILIB='$(SHLIB_MULTILIB)' \
 	  $(SHELL) mklibgcc > tmp-libgcc.mk
 	mv tmp-libgcc.mk libgcc.mk
 
@@ -976,7 +979,7 @@ libgcc.mk: config.status Makefile mklibgcc $(LIB2ADD) xgcc$(exeext)
 LIBGCC_DEPS = $(GCC_PASSES) $(LANGUAGES) stmp-int-hdrs $(STMP_FIXPROTO) \
 	libgcc.mk $(srcdir)/libgcc1.c $(srcdir)/libgcc2.c $(CONFIG_H) \
 	$(MACHMODE_H) longlong.h frame.h gbl-ctors.h config.status \
-	stmp-int-hdrs tsystem.h $(FPBIT) $(DPBIT) $(LIB2ADD)
+	stmp-int-hdrs tsystem.h $(FPBIT) $(DPBIT) $(LIB2ADD) $(EXTRA_PARTS)
 
 libgcc.a: $(LIBGCC_DEPS)
 	$(MAKE) GCC_FOR_TARGET="$(GCC_FOR_TARGET)" \

gcc/config/alpha/t-ieee

 # All alphas get an IEEE complaint set of libraries.
 MULTILIB_OPTIONS = mieee
 MULTILIB_DIRNAMES = ieee
+SHLIB_MULTILIB = ieee
 
 LIBGCC = stmp-multilib
 INSTALL_LIBGCC = install-multilib

gcc/config/alpha/t-osf

+# Do not build libgcc1. Let gcc generate those functions.
+LIBGCC1 = 
+CROSS_LIBGCC1 =
+LIBGCC1_TEST =
+
+EXTRA_HEADERS = $(srcdir)/config/alpha/va_list.h

gcc/config/alpha/t-osf4

+# Compile crtbeginS.o and crtendS.o with pic.
+CRTSTUFF_T_CFLAGS_S = -fPIC
+
+# Compile libgcc2.a with pic.
+TARGET_LIBGCC2_CFLAGS = -fPIC
+
+# Build a shared libgcc library.
+SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \
+	-Wl,-msym -Wl,-set_version,gcc.3 -Wl,-soname,@shlib_base_name@.so.0
+SHLIB_LIBS = -lc

gcc/config/alpha/x-alpha → gcc/config/alpha/x-osf

 CLIB=-lmld -lexc
-EXTRA_HEADERS = $(srcdir)/config/alpha/va_list.h

gcc/config/mips/t-iris6

@@ -18,3 +18,8 @@ INSTALL_LIBGCC = install-multilib
 
 EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o
 CRTSTUFF_T_CFLAGS=-g1
+
+# Build a shared libgcc library.
+SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \
+        -Wl,-soname,@shlib_base_name@.so.0
+SHLIB_LIBS = -lc

gcc/config/sparc/t-sol2

@@ -28,3 +28,8 @@ $(T)gcrt1.o: $(srcdir)/config/sparc/sol2-c1.asm $(GCC_PASSES)
 
 CRTSTUFF_T_CFLAGS = -fPIC
 TARGET_LIBGCC2_CFLAGS = -fPIC
+
+# Build a shared libgcc library.
+SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \
+	-Wl,-h,@shlib_base_name@.so.0 -Wl,-z,text -Wl,-z,defs
+SHLIB_LIBS = -lc

gcc/config/t-linux

@@ -8,6 +8,13 @@ INSTALL_ASSERT_H =
 CRTSTUFF_T_CFLAGS_S = -fPIC
 # Compile libgcc2.a with pic.
 TARGET_LIBGCC2_CFLAGS = -fPIC
+# Build a shared libgcc library.
+SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \
+	-Wl,--soname=@shlib_base_name@.so.0
+# ??? Do versioning later -- need to figure out how to post-process
+# the script and allow for target-specific additions.
+# -Wl,--version-script=$(srcdir)/config/ver-glibc.map
+SHLIB_LIBS = -lc
 
 # Do not build libgcc1. Let gcc generate those functions. The GNU/Linux
 # C library can handle them.

gcc/configure.in

@@ -319,6 +319,11 @@ AC_ARG_WITH(dwarf2,
 dwarf2="$with_dwarf2",
 dwarf2=no)
 
+AC_ARG_ENABLE(shared,
+[  --disable-shared       don't provide a shared libgcc.],
+[], [enable_shared=yes])
+AC_SUBST(enable_shared)
+
 # Determine the host, build, and target systems
 AC_CANONICAL_SYSTEM
 
@@ -812,7 +817,8 @@ changequote([,])dnl
 			extra_passes="mips-tfile mips-tdump"
 		fi
 		use_collect2=yes
-		tmake_file="alpha/t-alpha alpha/t-ieee"
+		tmake_file="alpha/t-alpha alpha/t-ieee alpha/t-osf"
+		xmake_file=alpha/x-osf
 		case $machine in
 		  *-*-osf1*)
 		    tm_file="${tm_file} alpha/osf.h alpha/osf12.h alpha/osf2or3.h"
@@ -824,12 +830,14 @@ changequote([,])dnl
 		    ;;
 		  *-*-osf4*)
 		    tm_file="${tm_file} alpha/osf.h"
+		    tmake_file="$tmake_file alpha/t-osf4"
 		    # Some versions of OSF4 (specifically X4.0-9 296.7) have
 		    # a broken tar, so we use cpio instead.
 		    install_headers_dir=install-headers-cpio
 		    ;;
 		  *-*-osf5*)
 		    tm_file="${tm_file} alpha/osf.h alpha/osf5.h"
+		    tmake_file="$tmake_file alpha/t-osf4"
 		    ;;
 		esac
 		case $machine in

gcc/mklibgcc.in

@@ -23,6 +23,9 @@
 # LIBGCC
 # MULTILIBS
 # EXTRA_MULTILIB_PARTS
+# SHLIB_LINK
+# SHLIB_LIBS
+# SHLIB_MULTILIB
 
 # Make needs VPATH to be literal.
 echo 'srcdir = @srcdir@'
@@ -49,6 +52,10 @@ EOF
   rm -f $tmp
 fi
 
+# Disable SHLIB_LINK if shared libgcc not enabled.
+if [ "@enable_shared@" = "no" ]; then
+  SHLIB_LINK=""
+fi
 
 # Build lines.
 
@@ -258,6 +265,7 @@ done
 
 for ml in $MULTILIBS; do
   dir=`echo ${ml} | sed -e 's/;.*$//' -e 's/=/$(EQ)/g'`
+  flags=`echo ${ml} | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`;
 
   libgcc_objs=""
   for o in $libgcc1_objs; do
@@ -278,6 +286,24 @@ for ml in $MULTILIBS; do
   echo '	if $(RANLIB_TEST_FOR_TARGET) ; then' \\
   echo '	  $(RANLIB_FOR_TARGET)' ${dir}/libgcc.a ';' \\
   echo '	else true; fi;'
+
+  if [ "$SHLIB_LINK" ]; then
+    if [ -z "$SHLIB_MULTILIB" ]; then
+      if [ "$dir" = "." ]; then
+	shlib_base_name="libgcc_s";
+      else
+	shlib_base_name=libgcc_s_`echo $dir | sed s,/,_,g`
+      fi
+      echo ""
+      echo "${dir}/${shlib_base_name}.so: $libgcc_objs"
+      echo "	$SHLIB_LINK $flags -o ${shlib_base_name}.so $libgcc_objs $SHLIB_LIBS" | sed "s/@shlib_base_name@/$shlib_base_name/g"
+    elif [ "$SHLIB_MULTILIB" = "$dir" ]; then
+      shlib_base_name="libgcc_s";
+      echo ""
+      echo "${shlib_base_name}.so: $libgcc_objs"
+      echo "	$SHLIB_LINK $flags -o ${shlib_base_name}.so $libgcc_objs $SHLIB_LIBS" | sed "s/@shlib_base_name@/$shlib_base_name/g"
+    fi
+  fi
 done
 
 dirs=libgcc
@@ -306,6 +332,23 @@ for ml in $MULTILIBS; do
     dirs="$dirs ${dir} libgcc/${dir}"
   fi
   all="$all ${dir}/libgcc.a"
+  if [ "$SHLIB_LINK" ]; then
+    if [ -z "$SHLIB_MULTILIB" ]; then
+      if [ "$dir" = "." ]; then
+	suff="";
+      else
+	suff=_`echo $dir | sed s,/,_,g`
+      fi
+      all="$all ${dir}/libgcc_s${suff}.so"
+    elif [ "$SHLIB_MULTILIB" = "$dir" ]; then
+      all="$all libgcc_s.so"
+    fi
+      if [ "$dir" = "." ]; then
+	suff="";
+      else
+	suff=_`echo $dir | sed s,/,_,g`
+      fi
+  fi
 done
 
 echo 'stmp-dirs: force'