libxkbcommon: import from homebrew/x11.

Formula/libxkbcommon.rb

@@ -0,0 +1,50 @@
+class Libxkbcommon < Formula
+  desc "Keyboard handling library"
+  homepage "https://xkbcommon.org/"
+  url "https://xkbcommon.org/download/libxkbcommon-0.7.1.tar.xz"
+  sha256 "ba59305d2e19e47c27ea065c2e0df96ebac6a3c6e97e28ae5620073b6084e68b"
+
+  head do
+    url "https://github.com/xkbcommon/libxkbcommon.git"
+
+    depends_on "autoconf" => :build
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
+  end
+
+  depends_on :x11
+  depends_on "bison" => :build
+  depends_on "pkg-config" => :build
+
+  def install
+    system "./autogen.sh" if build.head?
+    inreplace "configure" do |s|
+      s.gsub! "-version-script $output_objdir/$libname.ver", ""
+      s.gsub! "$wl-version-script", ""
+    end
+    inreplace %w[Makefile.in Makefile.am] do |s|
+      s.gsub! "-Wl,--version-script=${srcdir}/xkbcommon.map", ""
+      s.gsub! "-Wl,--version-script=${srcdir}/xkbcommon-x11.map", ""
+    end
+
+    system "./configure", "--disable-dependency-tracking",
+                          "--disable-silent-rules",
+                          "--prefix=#{prefix}"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.c").write <<-EOS.undent
+    #include <stdlib.h>
+    #include <xkbcommon/xkbcommon.h>
+    int main() {
+      return (xkb_context_new(XKB_CONTEXT_NO_FLAGS) == NULL)
+        ? EXIT_FAILURE
+        : EXIT_SUCCESS;
+    }
+    EOS
+    system ENV.cc, "test.c", "-I#{include}", "-L#{lib}", "-lxkbcommon",
+                   "-o", "test"
+    system "./test"
+  end
+end