build: fix Lua build

Each of Lua's major versions are incompatible with each other. Ubuntu,
at least, does not provide a single liblua.so or /usr/include/lua; all
SOs and headers are versioned, e.g. liblua5.3.so and
/usr/include/lua5.3. There's already an m4 macro in the GNU collection
to handle this situation, so let's use that.

This allows building with Lua enabled to work on platforms other than
Fedora.

* Move lib/lua.[ch] -> lib/frrlua.[ch] to prevent path conflicts
* Fix configure.ac search for proper CPP and linker flags
* Add Lua include path to AM_CPPFLAGS
* Update vtysh/extract.pl.in

Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/configure.ac b/configure.ac
index 86168a848..b7ddf87b4 100755
--- a/configure.ac
+++ b/configure.ac
@@ -222,9 +222,12 @@ elif test "x${enable_dev_build}" = "xyes"; then
       AC_C_FLAG([-O0])
    fi
    if test "x${enable_lua}" = "xyes"; then
-      AC_CHECK_LIB([lua], [lua_newstate],
-      [LIBS="$LIBS -llua"])
-      AC_DEFINE([HAVE_LUA], [1], [Lua enabled for development])
+      AX_PROG_LUA([5.3])
+      AX_LUA_HEADERS
+      AX_LUA_LIBS([
+         AC_DEFINE([HAVE_LUA], [1], [Have support for Lua interpreter])
+         LIBS="$LIBS $LUA_LIB"
+      ])
    fi
 else
    if test "x${enable_lua}" = "xyes"; then