Sync config-ml.in from GCC.

[Ralf Wildenhues]

I pushed this to maint in Ian's name, to sync the script from GCC.

Cheers,
Ralf

2010-11-19  Ian Lance Taylor  <address@hidden

        Sync config-ml.in from GCC.
        * config-ml.in: Add Go support: treat GOC and GOCFLAGS like other
        compiler/flag environment variables.

diff --git a/lib/config-ml.in b/lib/config-ml.in
index f2497ad..2dd0d51 100644
--- a/lib/config-ml.in
+++ b/lib/config-ml.in
@@ -2,7 +2,7 @@
 # wanting multilib support.
 #
 # Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
-# 2005, 2006, 2007  Free Software Foundation, Inc.
+# 2005, 2006, 2007, 2008, 2010  Free Software Foundation, Inc.
 #
 # This file is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -517,6 +517,7 @@ multi-do:
                                prefix="$(prefix)" \
                                exec_prefix="$(exec_prefix)" \
                                GCJFLAGS="$(GCJFLAGS) $${flags}" \
+                               GOCFLAGS="$(GOCFLAGS) $${flags}" \
                                CXXFLAGS="$(CXXFLAGS) $${flags}" \
                                LIBCFLAGS="$(LIBCFLAGS) $${flags}" \
                                LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" \
@@ -750,7 +751,7 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
         break
       fi
     done
-    ml_config_env='CC="${CC_}$flags" CXX="${CXX_}$flags" F77="${F77_}$flags" 
GCJ="${GCJ_}$flags" GFORTRAN="${GFORTRAN_}$flags"'
+    ml_config_env='CC="${CC_}$flags" CXX="${CXX_}$flags" F77="${F77_}$flags" 
GCJ="${GCJ_}$flags" GFORTRAN="${GFORTRAN_}$flags" GOC="${GOC_}$flags"'
 
     if [ "${with_target_subdir}" = "." ]; then
        CC_=$CC' '
@@ -758,6 +759,7 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
        F77_=$F77' '
        GCJ_=$GCJ' '
        GFORTRAN_=$GFORTRAN' '
+       GOC_=$GOC' '
     else
        # Create a regular expression that matches any string as long
        # as ML_POPDIR.
@@ -822,6 +824,18 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; 
then
          esac
        done
 
+       GOC_=
+       for arg in ${GOC}; do
+         case $arg in
+         -[BIL]"${ML_POPDIR}"/*)
+           GOC_="${GOC_}"`echo "X${arg}" | sed -n 
"s/X\\(-[BIL]${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n 
"s/X-[BIL]${popdir_rx}\\(.*\\)/\\1/p"`' ' ;;
+         "${ML_POPDIR}"/*)
+           GOC_="${GOC_}"`echo "X${arg}" | sed -n 
"s/X\\(${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n 
"s/X${popdir_rx}\\(.*\\)/\\1/p"`' ' ;;
+         *)
+           GOC_="${GOC_}${arg} " ;;
+         esac
+       done
+
        if test "x${LD_LIBRARY_PATH+set}" = xset; then
          LD_LIBRARY_PATH_=
          for arg in `echo "$LD_LIBRARY_PATH" | tr ':' ' '`; do