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-rw-r--r--m4/pdns_with_lua.m462
1 files changed, 62 insertions, 0 deletions
diff --git a/m4/pdns_with_lua.m4 b/m4/pdns_with_lua.m4
new file mode 100644
index 0000000..e280c1b
--- /dev/null
+++ b/m4/pdns_with_lua.m4
@@ -0,0 +1,62 @@
+AC_DEFUN([PDNS_WITH_LUA],[
+ AC_PROG_GREP()dnl Ensure we have grep
+ AC_MSG_CHECKING([which Lua implementation to use])
+ AC_ARG_WITH([lua],
+ [AS_HELP_STRING([--with-lua], [select Lua implementation @<:@default=auto@:>@])
+ ], [
+ with_lua=$withval
+ ], [
+ with_lua=auto
+ ])
+
+ AS_IF([test "x$with_lua" = "xyes"], [
+ dnl --with-lua was passed, make it auto
+ with_lua=auto
+ ])
+
+ AC_MSG_RESULT([$with_lua])
+
+ AS_IF([test "x$with_lua" = "xno" -a "$1" = "mandatory"], [
+ AC_MSG_ERROR([--without-lua specified, but Lua is not optional])
+ ])
+
+ LUAPC=""
+ luajit_min_version='2.0.2'
+ lua_min_version='5.1'
+
+ AS_IF([test "x$with_lua" != "xno"], [
+ AS_IF([test "x$with_lua" != "xauto"], [
+ with_lua_version=${lua_min_version}
+ AS_IF([echo "x$with_lua" | ${GREP} 'jit' >/dev/null 2>&1], [with_lua_version=${luajit_min_version}])
+ PKG_CHECK_MODULES([LUA], $with_lua >= $with_lua_version, [
+ AC_DEFINE([HAVE_LUA], [1], [Define to 1 if you have Lua])
+ LUAPC=$with_lua
+ ], [
+ AC_MSG_ERROR([Selected Lua ($with_lua) not found])
+ ])
+ ], [
+ PKG_CHECK_MODULES([LUA], [luajit >= ${luajit_min_version}], [
+ LUAPC=luajit
+ AC_DEFINE([HAVE_LUA], [1], [Define to 1 if you have Lua])
+ ], [ : ])
+ AS_IF([test -z "$LUAPC"], [
+ found_lua=n
+ m4_foreach_w([luapc], [lua5.3 lua-5.3 lua53 lua5.2 lua-5.2 lua52 lua5.1 lua-5.1 lua51 lua], [
+ AS_IF([test "$found_lua" != "y"], [
+ PKG_CHECK_MODULES([LUA], [luapc >= ${lua_min_version}], [
+ AC_DEFINE([HAVE_LUA], [1], [Define to 1 if you have lua])
+ found_lua=y
+ LUAPC=luapc
+ ], [ : ])
+ ])
+ ])
+ ])
+ ])
+ ])
+
+ AS_IF([test -z "$LUAPC" -a "$1" = "mandatory"], [
+ AC_MSG_ERROR([No Lua not found, but is mandatory])
+ ])
+
+ AM_CONDITIONAL([LUA], [test -n "x$LUAPC"])
+])