[gnome-games] build: Declare GUILE and GUILE_CONFIG as precious

[Christian Persch <chpe src gnome org>]

commit eeca6b05ce04db345e366a90c6005a6e4f7cd396
Author: Christian Persch <chpe gnome org>
Date:   Sun Jul 12 15:06:56 2009 +0200

    build: Declare GUILE and GUILE_CONFIG as precious
    
    This allows to set the GUILE and GUILE_CONFIG env vars and have
    configure pick them up, so one can install both guile 1.6 and 1.8 and
    choose which to use.

 configure.in |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/configure.in b/configure.in
index 841a680..8a0ec50 100644
--- a/configure.in
+++ b/configure.in
@@ -899,19 +899,23 @@ AC_SUBST([GNOME_GAMES_GGZ_INTLTOOL_ROOM_RULE])
 have_guile=no
 have_guile_1_8=no
 if test "$need_guile" = "yes"; then
-  AC_PATH_PROG([GUILE],[guile])
+  AC_ARG_VAR([GUILE],[path to guile])
+  if test "$ac_cv_env_GUILE_set" != "set"; then
+    AC_PATH_TOOL([GUILE],[guile])
+  fi
+
   if test -z "$GUILE" ; then
     AC_MSG_ERROR([guile not found; install guile development headers or use --enable-omitgames=aisleriot])
   fi
 
-  AC_PATH_PROG([GUILE_CONFIG],[guile-config])
+  AC_ARG_VAR([GUILE_CONFIG],[path to guile-config])
+  if test "$ac_cv_env_GUILE_CONFIG_set" != "set"; then
+    AC_PATH_TOOL([GUILE_CONFIG],[guile-config])
+  fi
   if test -z "$GUILE_CONFIG"; then
     AC_MSG_ERROR([guile not found; install guile development headers or use --enable-omitgames=aisleriot])
   fi
 
-  AC_SUBST([GUILE])
-  AC_SUBST([GUILE_CONFIG])
-
   GUILE_CFLAGS=`$GUILE_CONFIG compile`
   GUILE_LIBS=`$GUILE_CONFIG link`
   AC_SUBST([GUILE_CFLAGS])