From bc3775389acb53c519aaab707e8c99efe8e64bb2 Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Wed, 18 Jan 2012 08:33:37 +0100
Subject: [PATCH] dynconfig/config.m4: disallow --prefix=/usr and
 --prefix=/usr/local without --enable-fhs

This matches the waf configure behavior and catches the case where old build
scripts try '--with-fhs' instead of '--enable-fhs'.

metze
(cherry picked from commit ae037670b83557d8591c633896186a3634de30cc)
---
 dynconfig/config.m4 |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dynconfig/config.m4 b/dynconfig/config.m4
index 842a960..6b5dfdb 100644
--- a/dynconfig/config.m4
+++ b/dynconfig/config.m4
@@ -19,6 +19,10 @@ AC_ARG_ENABLE(fhs,
 [AS_HELP_STRING([--enable-fhs], [Turn on FHS support (default=no)])])
 
 if test x$enable_fhs != xyes; then
+	if test x"$prefix" = x"/usr" -o x"$prefix" = x"/usr/local"; then
+		AC_MSG_WARN([Don't install directly under /usr or /usr/local without using the FHS option (--enable-fhs)])
+		AC_MSG_ERROR([invalid --prefix=$prefix])
+	fi
 	MODULESDIR="${libdir}"
 	INCLUDEDIR="${includedir}"
 	SETUPDIR="${datadir}/setup"
-- 
1.7.9.5