libepoxy: add test

src/libepoxy-test.c

@@ -0,0 +1,10 @@
+/*
+ * This file is part of MXE. See LICENSE.md for licensing information.
+ */
+
+#include <epoxy/gl.h>
+
+int main() {
+    glGetString(GL_SHADING_LANGUAGE_VERSION);
+    return 0;
+}

src/libepoxy.mk

@@ -26,4 +26,10 @@ define $(PKG)_BUILD
     $(MAKE) -C '$(1)' -j '$(JOBS)' install $(MXE_DISABLE_CRUFT)
     $(SED) 's/Cflags:/Cflags: -DEPOXY_$(if $(BUILD_STATIC),STATIC,SHARED)/' \
         -i '$(PREFIX)/$(TARGET)/lib/pkgconfig/epoxy.pc'
+
+    # compile test
+    '$(TARGET)-gcc' \
+        -W -Wall -Werror -ansi -pedantic \
+        '$(TEST_FILE)' -o '$(PREFIX)/$(TARGET)/bin/test-$(PKG).exe' \
+        `'$(TARGET)-pkg-config' epoxy --cflags --libs`
 endef