make glib optional for cairo (#3022)

* make glib optional for cairo

* not asserting libiconv on linux clang

packages/c/cairo/xmake.lua

@@ -15,9 +15,10 @@ package("cairo")
     add_configs("freetype",   {description = "Enable freetype support.", default = true, type = "boolean"})
     add_configs("fontconfig", {description = "Enable fontconfig support.", default = true, type = "boolean"})
     add_configs("xlib",       {description = "Enable x11 surface backend.", default = is_plat("linux"), type = "boolean"})
+    add_configs("glib",       {description = "Enable glib dependency.", default = false, type = "boolean"})
 
     add_deps("meson", "ninja")
-    add_deps("libpng", "pixman", "zlib", "glib")
+    add_deps("libpng", "pixman", "zlib")
     if is_plat("windows") then
         add_deps("pkgconf", "libintl")
     elseif is_plat("macosx") then
@@ -51,6 +52,9 @@ package("cairo")
         if package:config("xlib") then
             package:add("deps", "libx11", "libxrender", "libxext")
         end
+        if package:config("glib") then
+            package:add("deps", "glib")
+        end
     end)
 
     on_install("windows|x64", "windows|x86", "macosx", "linux", function (package)
@@ -63,12 +67,12 @@ package("cairo")
             "-Dgtk2-utils=disabled",
             "-Dpng=enabled",
             "-Dzlib=enabled",
-            "-Dglib=enabled"
         }
         table.insert(configs, "-Ddefault_library=" .. (package:config("shared") and "shared" or "static"))
         table.insert(configs, "-Dfreetype=" .. (package:config("freetype") and "enabled" or "disabled"))
         table.insert(configs, "-Dfontconfig=" .. (package:config("fontconfig") and "enabled" or "disabled"))
         table.insert(configs, "-Dxlib=" .. (package:config("xlib") and "enabled" or "disabled"))
+        table.insert(configs, "-Dglib=" .. (package:config("glib") and "enabled" or "disabled"))
         io.replace("meson.build", "subdir('fuzzing')", "", {plain = true})
         io.replace("meson.build", "subdir('docs')", "", {plain = true})
         io.replace("meson.build", "'CoreFoundation'", "'CoreFoundation', 'Foundation'", {plain = true})

packages/g/gtk4/xmake.lua

@@ -24,8 +24,8 @@ package("gtk4")
     end
 
     add_deps("meson", "ninja")
-    add_deps("glib", "pango", "cairo", "gdk-pixbuf", "libepoxy", "graphene", "fribidi", "pcre2")
-    add_deps("harfbuzz", {configs = {glib = true}})
+    add_deps("glib", "pango", "gdk-pixbuf", "libepoxy", "graphene", "fribidi", "pcre2")
+    add_deps("harfbuzz", "cairo", {configs = {glib = true}})
     if is_plat("linux") then
         add_deps("libdrm")
         add_deps("libiconv")

packages/l/libiconv/xmake.lua

@@ -21,7 +21,7 @@ package("libiconv")
 
     on_fetch("macosx", "linux", function (package, opt)
         if opt.system then
-            if package:is_plat("linux") then
+            if package:is_plat("linux") and package:has_tool("cc", "gcc", "gxx") then
                 return {} -- on linux libiconv is already a part of glibc
             else
                 return package:find_package("system::iconv", {includes = "iconv.h"})

packages/p/pango/xmake.lua

@@ -10,8 +10,8 @@ package("pango")
     add_versions("1.50.3", "4a8b0cf33d5f9ecaa9cd99dd72703d5c4c53bc58df64dd9538493bb4356ab691")
 
     add_deps("meson", "ninja")
-    add_deps("fontconfig", "freetype", "fribidi", "cairo", "glib", "pcre2")
-    add_deps("harfbuzz", {configs = {glib = true}})
+    add_deps("fontconfig", "freetype", "fribidi", "glib", "pcre2")
+    add_deps("harfbuzz", "cairo", {configs = {glib = true}})
     if is_plat("windows") then
         add_deps("libintl")
     elseif is_plat("macosx") then