Add a safety precausion

[simgear.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 6c9ff9abc84a093329e10a08e8e8dbd267854985..7c8408ee8714da5e00ad234c60be60f012cfb4c6 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -42,19 +42,24 @@ dnl set the $host variable based on local machine/os
 AC_CANONICAL_HOST
 
 dnl Used on the Irix platform
-AR="ar"
-ARFLAGS="cru"
 case "${host}" in
 *-*-irix*)
-    if test "$CXX" = "CC"; then
-        AR="CC -ar"
+    if test "x$CXX" = "xCC" -o "x$CXX" = "xccache CC"; then
+        AR="$CXX -ar"
         ARFLAGS="-o"
         CXXFLAGS="$CXXFLAGS -I$(top_srcdir)/simgear/compatibility"
+        compatibility_DIR="compatibility"
     fi
     ;;
+*)
+    AR="ar"
+    ARFLAGS="cru"
+    compatibility_DIR=
+    ;;
 esac
 AC_SUBST(AR)
 AC_SUBST(ARFLAGS)
+AC_SUBST(compatibility_DIR)
 
 if echo $includedir | egrep "simgear$" > /dev/null; then
     echo "includedir is" $includedir "libdir is" $libdir
@@ -178,7 +183,6 @@ dnl check for some default libraries
 AC_SEARCH_LIBS(cos, m)
 
 base_LIBS="$LIBS"
-LIBS=""
 
 dnl check for glut location
 AC_CHECK_HEADER(GL/glut.h)