Can't set Pods project SDK_ROOT with post_install

[kevinkirkup]

I'm having an issue setting the SDKROOT (BaseSDK) in the top level Pods Project configuration.
I've tried using a post_install script and this seems to work for the SDKROOT of each of the targets but not the project level setting.

In Xcode, the Base SDK is listed as No SDK (Latest OS X) but I'm build for iOS and this causes the build to fail with this warning:

Pods was rejected as an implicit dependency for 'libPods.a' because its architectures
'arm64' didn't contain all required architectures 'armv7 arm64'

which leads to this error:

ld: library not found for -lPods-CocoaLumberjack

Here is the podfile that I'm using:

platform :ios, '8.3'

pod 'CocoaLumberjack', '~> 1.8'
pod 'TRSDialScrollView', '>= 1.0'

# Only add Kiwi to Unit Test projects
target :UnderPressureTests, :exclusive => true do
  pod 'Specta', '~> 0.5'
  pod 'Expecta', '~> 0.4'
  pod 'OCMock', '~> 3.1.2'
end

post_install do |installer|
  installer.project.targets.each do |target|
    p target.name
    target.build_configurations.each do |config|
      config.build_settings['SDKROOT'] = 'iphoneos'
    end
  end
end

I've compared the Pods/Pods.xcodeproj/project.pbxproj before and after the change and it looks like SDKROOT is not present for the Project target listed in the project.pbxproj file before I manually change it in Xcode.

Any ideas?

[kevinkirkup]

Update
I was able to use the latest version of xcodeproj to modify the project file and include the base SDK.

require 'xcodeproj'

project = Xcodeproj::Project.open("MyProject.xcodeproj")
project.build_configurations.each { |c| c.build_settings['SDKROOT'] = 'iphoneos' }
project.save

So this looks like I'm trying to modify the wrong build_configurations in the post_install.
Still not sure why the Base SDK is not being set by default.

[fatuhoku]

+1 This hasn't really worked for me. What's the best way to edit the Pod.xcodeproj?

[segiddins]

The best way to edit Pods.xcodeproj is using the Podfile post-install hook.

@kevinkirkup you never shared a project that exhibits this issue, and given I've never encountered it myself, I'm going to have to close the issue for now. If it persists, however, I'll re-open.

[revolter]

In Xcode 14, this Pods project warning started showing up:

**Project 'Pods' - Enable Dead Code Stripping
Enabling dead code stripping is recommended. This will update the DEAD_CODE_STRIPPING setting.

We wanted to get rid of this warning, and noticed that DEAD_CODE_STRIPPING is YES by default on iOS, but NO on macOS.

So we successfully used this workaround in `Podfile:

post_install do |installer|
    installer.pods_project.build_configurations.each do |build_configuration|
        build_configuration.build_settings['SDKROOT'] = 'iphoneos'
    end
end