Do a configure test whether or not to include -I/usr/local/include in

wx-config --c*flags instead of never doing it for gcc.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@25817 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -1347,6 +1347,18 @@ AC_PROG_CXX
 
 AC_LANG_RESTORE
 
+dnl check if compiler includes /usr/local/include in
+dnl default include files search path.
+AC_MSG_CHECKING([for /usr/local/include in default include path])
+GCC_SEARCHES_USR_LOCAL_INCLUDE="no"
+if test "$GCC" = "yes" ; then
+  echo | gcc -v -x c++ -E - 2>&1 | sed -n '/^#include </,$p' | \
+  	sed -n '1,/End of search list\./p' | \
+        grep '^ */usr/local/include$' 2>&1 /dev/null \
+  && GCC_SEARCHES_USR_LOCAL_INCLUDE="yes"
+fi
+AC_MSG_RESULT([$GCC_SEARCHES_USR_LOCAL_INCLUDE])
+
 dnl ranlib command
 dnl   defines RANLIB with the appropriate command
 AC_PROG_RANLIB
@@ -6021,6 +6033,7 @@ AC_SUBST(MACRESWXCONFIG)
 
 dnl other tools
 AC_SUBST(GCC)
+AC_SUBST(GCC_SEARCHES_USR_LOCAL_INCLUDE)
 AC_SUBST(DLLTOOL)
 AC_SUBST(AS)
 AC_SUBST(NM)