fix: fix android build, by correctly setting some defines

Author: Totto16

platforms/android/app/jni/Application.mk

@@ -11,3 +11,7 @@ APP_PLATFORM := android-35
 # support 16KB page sizes:
 # see: https://developer.android.com/guide/practices/page-sizes 
 APP_SUPPORT_FLEXIBLE_PAGE_SIZES := true
+
+# support weak api defs:
+# see https://developer.android.com/ndk/guides/using-newer-apis
+APP_WEAK_API_DEFS := true

tools/dependencies/meson.build

@@ -384,7 +384,14 @@ if build_application
         curl_cpp_wrapper = dependency(
             'cpr',
             required: true,
-            default_options: {'tests': 'disabled'},
+            default_options: {
+                'tests': 'disabled',
+                'curl:tests': 'disabled',
+                'curl:unittests': 'disabled',
+                'curl:bearer-auth': 'enabled',
+                'curl:brotli': 'enabled',
+                'curl:libz': 'enabled',
+            },
         )
 
         graphics_lib += {

tools/options/meson.build

@@ -34,6 +34,42 @@ if meson.is_cross_build() and host_machine.system() == 'serenity'
     ]
     core_lib += {'compile_args': temp}
     temp = 0
+elif meson.is_cross_build() and host_machine.system() == 'android'
+    cpp = meson.get_compiler('cpp')
+    target_android_api = '35'
+
+    android_api = cpp.get_define(
+        '__ANDROID_API__',
+        prefix: '#include <features.h>',
+    ).strip('"')
+    assert(
+        android_api != '',
+        'failed to get android_api version',
+    )
+
+    android_compile_args = []
+    android_link_args = []
+
+    # APP_SUPPORT_FLEXIBLE_PAGE_SIZES
+    android_link_args += '-Wl,-z,max-page-size=16384'
+
+    if android_api != target_android_api
+        android_compile_args += ('-D__ANDROID_API__=' + target_android_api)
+    endif
+
+    android_compile_args += [
+        '-D__ANDROID_UNAVAILABLE_SYMBOLS_ARE_WEAK__',
+        '-Werror=unguarded-availability',
+    ]
+
+    if not meson.is_subproject()
+        add_global_link_arguments(android_link_args, language: ['cpp'])
+        add_global_arguments(android_compile_args, language: ['cpp'])
+    else
+        add_project_link_arguments(android_link_args, language: ['cpp'])
+        add_project_arguments(android_compile_args, language: ['cpp'])
+
+    endif
 endif
 
 cpp = meson.get_compiler('cpp')