There is a problem at the linking stage of my React Native project. The library libRCTMapboxGL.a is causing this problem.
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can't locate file for: -lPods-RCTMapboxGL
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lPods-RCTMapboxGL is not an object file (not allowed in a library)
The file libRCTMapboxGL.a is not being created in /Users/user/Developer/RNProject/ios/build/Build/Products/Debug-iphonesimulator/ as consequence of the error with -lPods-RCTMapboxGL. However, the files seem to exist:
/Users/user/Developer/RNProject/node_modules/react-native-mapbox-gl/ios/Pods/Target Support Files/Pods-RCTMapboxGL/Pods-RCTMapboxGL.debug.xcconfig
/Users/user/Developer/RNProject/node_modules/react-native-mapbox-gl/ios/Pods/Target Support Files/Pods-RCTMapboxGL/Pods-RCTMapboxGL.release.xcconfig
Pods-RCTMapboxGL is not an object file looks strange in the error message, the content of the files is:
GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
HEADER_SEARCH_PATHS = $(inherited) "${PODS_ROOT}/Headers/Public"
OTHER_CFLAGS = $(inherited) -isystem "${PODS_ROOT}/Headers/Public"
OTHER_LDFLAGS = $(inherited) -ObjC
PODS_BUILD_DIR = $BUILD_DIR
PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
PODS_ROOT = ${SRCROOT}/Pods
The setup was done according this tutorial. Firstly using CocoaPods and then I manually verified if all the settings and files are in place.
Full error log:
Libtool /Users/user/Developer/RNProject/ios/build/Build/Products/Debug-iphonesimulator/libRCTMapboxGL.a normal x86_64
cd /Users/user/Developer/RNProject/node_modules/react-native-mapbox-gl/ios
export IPHONEOS_DEPLOYMENT_TARGET=8.0
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool -static -arch_only x86_64 -syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk -L/Users/user/Developer/RNProject/ios/build/Build/Products/Debug-iphonesimulator -L/Users/bobby/Downloads/mapbox-gl-ios-0.2.17 -L/Users/user/Developer/RNProject/node_modules/react-native-mapbox-gl/ios/RCTMapboxGL -filelist /Users/user/Developer/RNProject/ios/build/Build/Intermediates/RCTMapboxGL.build/Debug-iphonesimulator/RCTMapboxGL.build/Objects-normal/x86_64/RCTMapboxGL.LinkFileList -lPods-RCTMapboxGL -o /Users/user/Developer/RNProject/ios/build/Build/Products/Debug-iphonesimulator/libRCTMapboxGL.a
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can't locate file for: -lPods-RCTMapboxGL
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lPods-RCTMapboxGL is not an object file (not allowed in a library)
The problem was that I used pod init inside the MapboxGL directory, which created the extra files. Removing the generated files solved the problem.