configure: Fail if Lua was enabled, but not found

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/configure.ac b/configure.ac
index d573c94c38c367e740bf43f21e6c2f7b08344b9a..7fb97317d2ca49a67e99ec1e9b878a2d29fabf23 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -192,10 +192,8 @@ PKG_CHECK_MODULES([PYTHON], [python-${PYTHON_VERSION}])
 AC_ARG_ENABLE(lua,
        AS_HELP_STRING([--disable-lua], [do not build the Lua modules]), [], [enable_lua=yes])
 
-AM_CONDITIONAL(ENABLE_LUA, [test "x$enable_lua" = "xyes"])
-
 AS_IF(
-       [test "$enable_lua" = "yes"], [
+       [test "x$enable_lua" = "xyes"], [
                for lua in lua lua5.4 lua5.3 lua5.2 lua5.1; do
                        PKG_CHECK_MODULES([LUA], [${lua}], [break], [true])
                done
@@ -208,9 +206,16 @@ AS_IF(
                AC_SUBST(LUA_INSTALL_LMOD)
                LUA_INSTALL_CMOD=$($PKG_CONFIG --define-variable=prefix=${prefix} --variable=INSTALL_CMOD ${lua})
                AC_SUBST(LUA_INSTALL_CMOD)
+
+               # Fail if we could not find anything to link against
+               if test "x${LUA_VERSION}" = "x"; then
+                       AC_MSG_ERROR([Could not find Lua])
+               fi
        ],
 )
 
+AM_CONDITIONAL(ENABLE_LUA, [test "x$enable_lua" = "xyes"])
+
 # Perl
 AC_PATH_PROG(PERL, perl, no)
 AC_SUBST(PERL)