[committed] ADAC removal part 3

[neroden at twcny dot rr dot com (Nathanael Nerode)]

This does the trick, although I'd like to clean it up a little more.
Tested on i686-pc-linux-gnu, committed.

	* aclocal.m4 (gcc_AC_PROG_GNAT): Rewrite to account for removal
	of ADAC.
	* configure: Regenerate.

Index: aclocal.m4
===================================================================
RCS file: /cvs/gcc/gcc/gcc/aclocal.m4,v
retrieving revision 1.81
diff -u -r1.81 aclocal.m4
--- aclocal.m4	1 Nov 2003 02:34:58 -0000	1.81
+++ aclocal.m4	26 Nov 2003 19:13:14 -0000
@@ -318,46 +318,33 @@
 
 dnl Test for GNAT.
 dnl We require the gnatbind program, and a compiler driver that
-dnl understands Ada.  The user may set the driver name explicitly
-dnl with ADAC; also, the user's CC setting is tried.  Failing that,
-dnl we try gcc and cc, then a sampling of names known to be used for
-dnl the Ada driver on various systems.
+dnl understands Ada.  We use the user's CC setting, already found.
 dnl
 dnl Sets the shell variable have_gnat to yes or no as appropriate, and
-dnl substitutes GNATBIND and ADAC.
+dnl substitutes GNATBIND.
 AC_DEFUN([gcc_AC_PROG_GNAT],
 [AC_REQUIRE([AC_CHECK_TOOL_PREFIX])
+AC_REQUIRE([AC_PROG_CC])
 AC_CHECK_TOOL(GNATBIND, gnatbind, no)
-AC_CACHE_CHECK([for compiler driver that understands Ada],
-		 gcc_cv_prog_adac,
+AC_CACHE_CHECK([whether compiler driver understands Ada],
+		 gcc_cv_cc_supports_ada,
 [cat >conftest.adb <<EOF
 procedure conftest is begin null; end conftest;
 EOF
-gcc_cv_prog_adac=no
-# Have to do ac_tool_prefix and user overrides by hand.
-for cand in ${ADAC+"$ADAC"} ${CC+"$CC"}	\
-	    ${ac_tool_prefix}gcc	gcc		\
-	    ${ac_tool_prefix}cc		cc		\
-	    ${ac_tool_prefix}gnatgcc	gnatgcc		\
-	    ${ac_tool_prefix}gnatcc	gnatcc		\
-	    ${ac_tool_prefix}adagcc	adagcc		\
-	    ${ac_tool_prefix}adacc	adacc		; do
-  # There is a bug in all released versions of GCC which causes the
-  # driver to exit successfully when the appropriate language module
-  # has not been installed.  This is fixed in 2.95.4, 3.0.2, and 3.1.
-  # Therefore we must check for the error message as well as an
-  # unsuccessful exit.
-  errors=`($cand -c conftest.adb) 2>&1 || echo failure`
-  if test x"$errors" = x; then
-    gcc_cv_prog_adac=$cand
-    break
-  fi
-done
+gcc_cv_cc_supports_ada=no
+# There is a bug in old released versions of GCC which causes the
+# driver to exit successfully when the appropriate language module
+# has not been installed.  This is fixed in 2.95.4, 3.0.2, and 3.1.
+# Therefore we must check for the error message as well as an
+# unsuccessful exit.
+errors=`(${CC} -c conftest.adb) 2>&1 || echo failure`
+if test x"$errors" = x; then
+  gcc_cv_cc_supports_ada=yes
+  break
+fi
 rm -f conftest.*])
-ADAC=$gcc_cv_prog_adac
-AC_SUBST(ADAC)
 
-if test x$GNATBIND != xno && test x$ADAC != xno; then
+if test x$GNATBIND != xno && test x$gcc_cv_supports_ada != xno; then
   have_gnat=yes
 else
   have_gnat=no

-- 
Nathanael Nerode  <neroden at gcc.gnu.org>
http://home.twcny.rr.com/nerode/neroden/fdl.html