cgif: add package (#3818)

* add cgif

* fix windows shared

* limit plat

packages/c/cgif/xmake.lua

@@ -0,0 +1,36 @@
+package("cgif")
+    set_homepage("https://github.com/dloebl/cgif")
+    set_description("GIF encoder written in C")
+    set_license("MIT")
+
+    add_urls("https://github.com/dloebl/cgif/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/dloebl/cgif.git")
+
+    add_versions("v0.4.0", "130ff8a604f047449e81ddddf818bd0e03826b5f468e989b02726b16b7d4742e")
+
+    if is_plat("linux") then
+        add_extsources("apt::libcgif-dev", "pacman::libcgif")
+    elseif is_plat("macosx") then
+        add_extsources("brew::cgif")
+    end
+
+    add_deps("meson", "ninja")
+
+    on_install("windows", "linux", "macosx", "bsd", "mingw", "msys", "iphoneos", "cross", function (package)
+        local opt = {}
+        if package:is_plat("windows") and package:config("shared") then
+            io.replace("inc/cgif.h", "CGIF* cgif_newgif", "LIBRARY_API CGIF* cgif_newgif", {plain = true})
+            io.replace("inc/cgif.h", "int   cgif_addframe", "LIBRARY_API int cgif_addframe", {plain = true})
+            io.replace("inc/cgif.h", "int   cgif_close", "LIBRARY_API int cgif_close", {plain = true})
+            opt.cxflags = "-DLIBRARY_API=__declspec(dllexport)"
+            package:add("defines", "LIBRARY_API=__declspec(dllimport)")
+        end
+
+        local configs = {"-Dexamples=false", "-Dtests=false"}
+        table.insert(configs, "-Ddefault_library=" .. (package:config("shared") and "shared" or "static"))
+        import("package.tools.meson").install(package, configs, opt)
+    end)
+
+    on_test(function (package)
+        assert(package:has_cfuncs("cgif_newgif", {includes = "cgif.h"}))
+    end)