Add a generic lluadash tag

Adds a generic lluadash tag that used in conjunction with a lua version
tag uses liblua-X.Y as the library name.

README.md

@@ -27,7 +27,7 @@ If you want to statically link to liblua.a you can do that with `-tags luaa`. Lu
 specifying `-tags luajit`.
 
 The library uses lua5.1 by default but also supports lua5.2 by specifying `-tags lua52`, lua5.3 by
-specifying `-tags lua53`, and lua5.4 by specifying `-tags lua54`.
+specifying `-tags lua53`, and lua5.4 by specifying `-tags lua54`. If the library installed on your system has a dash, for example it is called `liblua-5.4` use the `lluadash` tag: `go build -tags lua54,lluadash ...`.
 
 QUICK START
 ---------------------

lua/lua.go

@@ -15,26 +15,29 @@ package lua
 #cgo luaa LDFLAGS: -llua -lm -ldl
 #cgo luajit LDFLAGS: -lluajit-5.1
 #cgo lluadash5.1 LDFLAGS: -llua-5.1
-
-#cgo linux,!lua52,!lua53,!lua54,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua5.1
-#cgo linux,lua52,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua5.2
-#cgo linux,lua53,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua5.3
-#cgo linux,lua54,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua5.4 -lm
-
-#cgo darwin,!lua52,!lua53,!lua54,!llua,!luaa,!luajit,!lluadash5.1 pkg-config: lua5.1
-#cgo darwin,lua52,!llua,!luaa,!luajit,!lluadash5.1 pkg-config: lua5.2
-#cgo darwin,lua53,!llua,!luaa,!luajit,!lluadash5.1 pkg-config: lua5.3
-#cgo darwin,lua54,!llua,!luaa,!luajit,!lluadash5.1 pkg-config: lua5.4 m
-
-#cgo freebsd,!lua52,!lua53,!lua54,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua-5.1
-#cgo freebsd,lua52,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua-5.2
-#cgo freebsd,lua53,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua-5.3
-#cgo freebsd,lua54,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua-5.4 -lm
-
-#cgo windows,!lua52,!lua53,!lua54,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -L${SRCDIR} -llua -lmingwex -lmingw32
-#cgo windows,lua52,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua52
-#cgo windows,lua53,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua53
-#cgo windows,lua54,!llua,!luaa,!luajit,!lluadash5.1 LDFLAGS: -llua54
+#cgo lua52,lluadash LDFLAGS: -llua-5.4
+#cgo lua53,lluadash LDFLAGS: -llua-5.3
+#cgo lua54,lluadash LDFLAGS: -llua-5.4 -lm
+
+#cgo linux,!lua52,!lua53,!lua54,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua5.1
+#cgo linux,lua52,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua5.2
+#cgo linux,lua53,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua5.3
+#cgo linux,lua54,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua5.4 -lm
+
+#cgo darwin,!lua52,!lua53,!lua54,!llua,!luaa,!luajit,!lluadash5.1,!lluadash pkg-config: lua5.1
+#cgo darwin,lua52,!llua,!luaa,!luajit,!lluadash5.1,!lluadash pkg-config: lua5.2
+#cgo darwin,lua53,!llua,!luaa,!luajit,!lluadash5.1,!lluadash pkg-config: lua5.3
+#cgo darwin,lua54,!llua,!luaa,!luajit,!lluadash5.1,!lluadash pkg-config: lua5.4 m
+
+#cgo freebsd,!lua52,!lua53,!lua54,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua-5.1
+#cgo freebsd,lua52,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua-5.2
+#cgo freebsd,lua53,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua-5.3
+#cgo freebsd,lua54,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua-5.4 -lm
+
+#cgo windows,!lua52,!lua53,!lua54,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -L${SRCDIR} -llua -lmingwex -lmingw32
+#cgo windows,lua52,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua52
+#cgo windows,lua53,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua53
+#cgo windows,lua54,!llua,!luaa,!luajit,!lluadash5.1,!lluadash LDFLAGS: -llua54
 
 #include <lua.h>
 #include <stdlib.h>