How to set CLANG_ENABLE_MODULES = NO for pod generated project? - ios

Question

I'm trying to integrate ccache on my project which doesn't support clang modules. So I disabled clang modules in my main xcode project like below.
But for cocoapods generated project files, clang modules are enabled by default. Even if I change this setting, cocoapods will change it back on next pod update.
Is there anyway to let pod know that I want to fall back to the old behavior before apple introduced clang modules? Turn off CLANG_ENABLE_MODULES, and link system frameworks used by other pod generated static library for me in my main project automatically, like AVFoundation, MapKit, etc

Answer 1

Are you a Chinese developer? Have you seen this article before?
https://zhuanlan.zhihu.com/p/27584726
It's a tutorial of using ccache to speed up Xcode build process.It also provide the config of cocoapods.
I copied the code here, to let others who don't know Chinese and encounter the same problem know how to solve this problem.
post_install do |installer_representation|
installer_representation.pods_project.targets.each do |target|
target.build_configurations.each do |config|
#关闭 Enable Modules (Translation:Close Enable Modules)
config.build_settings['CLANG_ENABLE_MODULES'] = 'NO'
# 在生成的 Pods 项目文件中加入 CC 参数，路径的值根据你自己的项目来修改(Translation: Add CC parameter to pods project. You can change the path to whatever you want.)
config.build_settings['CC'] = '$(PODS_ROOT)/../ccache-clang'
end
end
end
but this configuration only turn off CLANG_ENABLE_MODULES.
As far as I know, there is no way to link system frameworks when using ccache and cocoapods.
Hope it helps.

Answer 2

If you are creating a custom pod, in your podspec file, write something like this,
Pod::Spec.new do |s|
# some configuration
s.pod_target_xcconfig = {
'OTHER_LDFLAGS' => '-lObjC', # if you created a category for a class from other lib
'CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES' => 'YES',
'CLANG_ENABLE_MODULES' => 'NO', # here is what you want
'CLANG_WARN_DOCUMENTATION_COMMENTS' => 'NO',
'GCC_C_LANGUAGE_STANDARD' => 'gnu17'
}
end