Improve C++ header location detection (bug 13966)

1 files changed, 4 insertions, 6 deletions

diff --git a/configure b/configure
index 6718bee0da..d159ce0e7b 100755
--- a/configure
+++ b/configure
@@ -5345,13 +5345,11 @@ if test -n "$sysheaders"; then
     CXX_SYSINCLUDES=
     cxxversion=`$CXX -dumpversion 2>&5` &&
     cxxmachine=`$CXX -dumpmachine 2>&5` &&
-    for d in include "$cxxmachine/include"; do
-      i=../../../../$d/c++/$cxxversion
-      cxxheaders=`$CXX -print-file-name="$i"` &&
-      test "x$cxxheaders" != x && test "x$i" != "x$cxxheaders" &&
-      CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders \
+    cxxplus=`$CXX -print-prog-name=cc1plus`
+    cxxheaders=`$cxxplus -v /dev/null 2>&1 | sed -n '/ \//{p;q;}' | sed 's/ //'`
+    test "x$cxxheaders" != x && test "x$i" != "x$cxxheaders" &&
+    CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders \
 -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
-    done
   fi
 fi