re PR libgcj/6158 (libgcj won't bootstrap on sparc-sun-solaris2.8 if already installed)

	* configure.in: Disallow configuring libgcj when it is already
	installed and we're using Solaris 2.8 linker.  Do enable libgcj on
	Solaris 2.8 by default.  For PR libgcj/6158.

From-SVN: r52497

ChangeLog

+2002-04-18  Tom Tromey  <tromey@redhat.com>
+
+	* configure.in: Disallow configuring libgcj when it is already
+	installed and we're using Solaris 2.8 linker.  Do enable libgcj on
+	Solaris 2.8 by default.  For PR libgcj/6158.
+
 2002-04-17  Nathanael Nerode  <neroden@twcny.rr.com>
 
 	* configure.in:  Move default CC setting out of config/mh-* fragments

configure.in

@@ -1046,15 +1046,6 @@ case "${target}" in
     fi
     ;;
   sparc-*-solaris*)
-    case "${host}" in
-    sparc-*-solaris2.8)
-      # According to Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>, libjava
-      # won't build correctly on Solaris 8 if there's a
-      # previously-installed version of GCC in the configured prefix.
-      # This problem does not show up on earlier versions of Solaris.
-      noconfigdirs="$noconfigdirs ${libgcj}"
-      ;;
-    esac
     ;;
   v810-*-*)
     noconfigdirs="$noconfigdirs bfd binutils gas gcc gdb ld ${libstdcxx_version} opcodes target-libgloss ${libgcj}"
@@ -1428,6 +1419,33 @@ case "${host}" in
   ;;
 esac
 
+# If we're building libgcj and we're using the Solaris 2.8 linker,
+# then we check for a known problem.
+if test "x${libgcj}" = x && test "${with_gnu_ld}" != yes \
+   && test "${is_cross_compiler}" = no; then
+
+   case "${host}" in
+    sparc-*-solaris2.8)
+       if test "$libdir" = '${exec_prefix}/lib';then
+	  if test "$exec_prefix" = '$(prefix)'; then
+	     tlibdir="$prefix/lib"
+	  else
+	     tlibdir="$exec_prefix/lib"
+	  fi
+       else
+	  tlibdir="$libdir"
+       fi
+       if test -f $tlibdir/libgcj.la; then
+	  echo "*** You've already installed libgcj in $tlibdir." 1>&2
+	  echo "    This causes problems when rebuilding libgcj with the Solaris 2.8 linker." 1>&2
+	  echo "    Either disable the libgcj build, or remove the" 1>&2
+	  echo "    already-installed libgcj files." 1>&2
+	  exit 1
+       fi
+       ;;
+   esac
+fi
+
 # If --enable-shared was set, we must set LD_LIBRARY_PATH so that the
 # binutils tools will find libbfd.so.
 if [ "${shared}" = "yes" ]; then