unified gcc and src config.if

[Alexandre Oliva <aoliva at redhat dot com>]

Now that GCC's config.if no longer sets gcc_version_trigger
unconditionally, it is possible to replace src's very outdated version
with that from GCC.  DJ, you may want to add this file to the list of
files you monitor and keep in sync between the two repositories, if
you want.

Index: ChangeLog
from  Alexandre Oliva  <aoliva@redhat.com>

	* config.if: Copy from GCC.

Index: config.if
===================================================================
RCS file: /cvs/src/src/config.if,v
retrieving revision 1.3
diff -u -p -r1.3 config.if
--- config.if 14 May 2001 16:40:49 -0000 1.3
+++ config.if 30 Jan 2003 11:54:46 -0000
@@ -2,9 +2,8 @@
 # Don't call it directly. This shell script fragment is called to
 # determine:
 #
-#	1. libstcxx_interface: the interface name for libstdc++.
-#	2. cxx_interface: the interface name for c++.
-#	3. libc_interface: the interface name for libc.
+#	1. libstcxx_incdir: the interface name for libstdc++.
+#	2. libc_interface: the interface name for libc.
 #
 
 # Get the top level src dir.
@@ -21,25 +20,21 @@ else
   if_topsrcdir=${top_srcdir}
 fi
 
-if [ "${enable_libstdcxx_v3}" = "yes" ] ; then
-  libstdcxx_srcdir=${if_topsrcdir}/libstdc++-v3
-else
-  libstdcxx_srcdir=${if_topsrcdir}/libstdc++
-fi
-
-if [ -f ${libstdcxx_srcdir}/Makefile.in ]; then
-# We check libstdc++ for libstdcxx_interface.
-libstdcxx_interface=`grep "^INTERFACE" ${libstdcxx_srcdir}/Makefile.in | sed 's/INTERFACE[ 	]*=[ 	]*\(.*\)/\1/'`
-else
-libstdcxx_interface=
-fi
-
-if [ -f ${if_topsrcdir}/gcc/cp/Makefile.in ]; then
-# We check gcc/cp for cxx_interface.
-cxx_interface=`grep "^INTERFACE" ${if_topsrcdir}/gcc/cp/Makefile.in | sed 's/INTERFACE[ 	]*=[ 	]*\(.*\)/\1/'`
-else
-cxx_interface=
+# Set libstdcxx_incdir.
+# This is the same as gcc/configure.in and libstdc++-v3/acinclude.m4. 
+if test -z "$gcc_version"; then
+  if test -z "${gcc_version_trigger}" \
+     && test -f ${if_topsrcdir}/gcc/version.c; then
+    gcc_version_trigger=${if_topsrcdir}/gcc/version.c
+  fi    
+  if test -f "${gcc_version_trigger}"; then
+    gcc_version_full=`grep version_string "${gcc_version_trigger}" | sed -e 's/.*"\([^"]*\)".*/\1/'`
+  else
+    gcc_version_full=`$CC -v 2>&1 | sed -n 's/^gcc version //p'`
+  fi
+  gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
 fi
+libstdcxx_incdir=c++/${gcc_version}
 
 # The trickiest part is libc_interface.
 if [ -z "${libc_interface}" ]
@@ -82,8 +77,8 @@ EOF
 	exit 1
       fi
     else
-      # Cross compiling. Assume glibc 2.2.
-      libc_interface=-libc6.2-
+      # Cross compiling. Assume glibc 2.1.
+      libc_interface=-libc6.1-
     fi
     ;;
   *)
-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist                Professional serial bug killer