Add check for GNU or not GNU ld, needed to pick the right export_dynamic

flags for Solaris.  The test itself is straight from libtool.

aclocal.m4

-dnl $Header: /cvsroot/pgsql/aclocal.m4,v 1.9 2000/09/25 22:22:52 petere Exp $
+dnl $Header: /cvsroot/pgsql/aclocal.m4,v 1.10 2000/10/20 23:57:32 petere Exp $
 builtin([include], [config/ac_func_accept_argtypes.m4])
 builtin([include], [config/c-compiler.m4])
 builtin([include], [config/c-library.m4])
 builtin([include], [config/cxx.m4])
 builtin([include], [config/general.m4])
+builtin([include], [config/libtool.m4])
 builtin([include], [config/programs.m4])
 builtin([include], [config/python.m4])
 builtin([include], [config/tcl.m4])

config/libtool.m4

+## libtool.m4 - Configure libtool for the host system. -*-Shell-script-*-
+## Copyright (C) 1996-1999,2000 Free Software Foundation, Inc.
+## Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+##
+## As a special exception to the GNU General Public License, if you
+## distribute this file as part of a program that contains a
+## configuration script generated by Autoconf, you may include it under
+## the same distribution terms that you use for the rest of that program.
+
+# No, PostgreSQL doesn't use libtool (yet), we just borrow stuff from it.
+# This file was taken on 2000-10-20 from the multi-language branch (since
+# that is the branch that PostgreSQL would most likely adopt anyway).
+# --petere
+
+# ... bunch of stuff removed here ...
+
+# AC_PROG_LD - find the path to the GNU or non-GNU linker
+AC_DEFUN(AC_PROG_LD,
+[AC_ARG_WITH(gnu-ld,
+[  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
+test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
+AC_REQUIRE([AC_PROG_CC])dnl
+AC_REQUIRE([AC_CANONICAL_HOST])dnl
+dnl ###not for PostgreSQL### AC_REQUIRE([AC_CANONICAL_BUILD])dnl
+ac_prog=ld
+if test "$ac_cv_prog_gcc" = yes; then
+  # Check if gcc -print-prog-name=ld gives a path.
+  AC_MSG_CHECKING([for ld used by GCC])
+  case $host in
+  *-*-mingw*)
+    # gcc leaves a trailing carriage return which upsets mingw
+    ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+  *)
+    ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
+  esac
+  case "$ac_prog" in
+    # Accept absolute paths.
+changequote(,)dnl
+    [\\/]* | [A-Za-z]:[\\/]*)
+      re_direlt='/[^/][^/]*/\.\./'
+changequote([,])dnl
+      # Canonicalize the path of ld
+      ac_prog=`echo $ac_prog| sed 's%\\\\%/%g'`
+      while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
+	ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
+      done
+      test -z "$LD" && LD="$ac_prog"
+      ;;
+  "")
+    # If it fails, then pretend we aren't using GCC.
+    ac_prog=ld
+    ;;
+  *)
+    # If it is relative, then search for the first ld in PATH.
+    with_gnu_ld=unknown
+    ;;
+  esac
+elif test "$with_gnu_ld" = yes; then
+  AC_MSG_CHECKING([for GNU ld])
+else
+  AC_MSG_CHECKING([for non-GNU ld])
+fi
+AC_CACHE_VAL(ac_cv_path_LD,
+[if test -z "$LD"; then
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+      ac_cv_path_LD="$ac_dir/$ac_prog"
+      # Check to see if the program is GNU ld.  I'd rather use --version,
+      # but apparently some GNU ld's only accept -v.
+      # Break only if it was the GNU/non-GNU ld that we prefer.
+      if "$ac_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
+	test "$with_gnu_ld" != no && break
+      else
+	test "$with_gnu_ld" != yes && break
+      fi
+    fi
+  done
+  IFS="$ac_save_ifs"
+else
+  ac_cv_path_LD="$LD" # Let the user override the test with a path.
+fi])
+LD="$ac_cv_path_LD"
+if test -n "$LD"; then
+  AC_MSG_RESULT($LD)
+else
+  AC_MSG_RESULT(no)
+fi
+test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
+AC_PROG_LD_GNU
+])
+
+AC_DEFUN(AC_PROG_LD_GNU,
+[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], ac_cv_prog_gnu_ld,
+[# I'd rather use --version here, but apparently some GNU ld's only accept -v.
+if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
+  ac_cv_prog_gnu_ld=yes
+else
+  ac_cv_prog_gnu_ld=no
+fi])
+with_gnu_ld=$ac_cv_prog_gnu_ld
+])
+
+# ... more stuff removed ...
+
+# ... added:
+AC_SUBST(LD)
+AC_SUBST(with_gnu_ld)

configure.in

@@ -592,6 +592,7 @@ AC_SUBST(INSTALL_SHLIB)
 AC_PROG_AWK
 PGAC_PATH_FLEX
 AC_PROG_LN_S
+AC_PROG_LD
 AC_PROG_RANLIB
 AC_CHECK_PROGS(LORDER, lorder)
 AC_PATH_PROG(TAR, tar)

src/Makefile.global.in

 # -*-makefile-*-
-# $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.101 2000/10/20 21:03:38 petere Exp $
+# $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.102 2000/10/20 23:57:33 petere Exp $
 
 #------------------------------------------------------------------------------
 # All PostgreSQL makefiles include this file and use the variables it sets,
@@ -160,6 +160,8 @@ FLEXFLAGS = @FLEXFLAGS@ $(LFLAGS)
 
 AROPT = @AROPT@
 LIBS = @LIBS@
+LD = @LD@
+with_gnu_ld = @with_gnu_ld@
 LDFLAGS = @LDFLAGS@ $(LIBS)
 KRB_LIBS = @KRB_LIBS@
 LDREL = -r

src/makefiles/Makefile.solaris

-# $Header: /cvsroot/pgsql/src/makefiles/Makefile.solaris,v 1.1 2000/10/10 21:22:28 petere Exp $
+# $Header: /cvsroot/pgsql/src/makefiles/Makefile.solaris,v 1.2 2000/10/20 23:57:34 petere Exp $
+
+ifeq ($(with_gnu_ld), yes)
+export_dynamic = -Wl,-E
+endif
 
 %.so: %.o
 	$(LD) -G -Bdynamic -o $@ $<