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POCombining ARC and non-ARC files not working
 

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  1. POCombining ARC and non-ARC files not working
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    <p>Once I add the -fno-objc-arc flag to one or more individual files in Build Phases, my MyProject-Prefix.pch file is thrown into non-ARC mode, causing 150 warnings like "warning: no 'assign', 'retain', or 'copy' attribute is specified - 'assign' is assumed" to be thrown.</p> <p>Here's the clang log output from compiling MyProject-Prefix.pch. As you can see, the -fobjc-arc flag appears, but later on, -no-fobjc-arc is added, which I'm assuming overrides ARC. This only happens if I add -fno-objc-arc to a single .m source file in Build Phases (the standard advice that everyone gets to mix ARC and non-ARC files).</p> <p>Any ideas?</p> <pre><code>/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x objective-c-header -arch i386 -fmessage-length=0 -std=gnu99 -fobjc-arc -Wno-trigraphs -fpascal-strings -O0 -Wno-missing-field-initializers -Wno-missing-prototypes -Wreturn-type -Wno-implicit-atomic-properties -Wformat -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wno-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-sign-compare -Wno-shorten-64-to-32 -Wpointer-sign -Wno-newline-eof -Wno-selector -Wno-strict-selector-match -Wno-undeclared-selector -Wno-deprecated-implementations -DDEBUG -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk -fexceptions -fasm-blocks -Wprotocol -Wdeprecated-declarations -mmacosx-version-min=10.6 -g -Wno-conversion -Wno-sign-conversion -fobjc-abi-version=2 -fobjc-legacy-dispatch "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -D__IPHONE_OS_VERSION_MIN_REQUIRED=50100 -iquote /Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/MyProject.build/Debug-iphonesimulator/MyProject.build/MyProject-generated-files.hmap -I/Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/MyProject.build/Debug-iphonesimulator/MyProject.build/MyProject-own-target-headers.hmap -I/Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/MyProject.build/Debug-iphonesimulator/MyProject.build/MyProject-all-target-headers.hmap -iquote /Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/MyProject.build/Debug-iphonesimulator/MyProject.build/MyProject-project-headers.hmap -iquoteOAuth2Client -iquoteOAuth2Client/Sources -iquoteOAuth2Client/Sources/OAuth2Client -I/Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Products/Debug-iphonesimulator/include -I../../Source/facebook-ios-sdk/src -I/Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Products/Debug-iphonesimulator/../three20 -I/Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Products/Debug-iphonesimulator/../../three20 -I../../Source/three20/Build/Products/three20 -I/Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/MyProject.build/Debug-iphonesimulator/MyProject.build/DerivedSources/i386 -I/Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/MyProject.build/Debug-iphonesimulator/MyProject.build/DerivedSources -F/Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Products/Debug-iphonesimulator -F/Users/steve/Desktop/MyProject/YelpAPI/Frameworks -fno-objc-arc --serialize-diagnostics /Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/PrecompiledHeaders/MyProject-Prefix-eouuweehlrhtjxdsrgwseamnhnna/MyProject-Prefix.pch.dia -c /Users/steve/Desktop/MyProject/MyProject/MyProject-Prefix.pch -o /Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/PrecompiledHeaders/MyProject-Prefix-eouuweehlrhtjxdsrgwseamnhnna/MyProject-Prefix.pch.pth -MMD -MT dependencies -MF /Users/steve/Library/Developer/Xcode/DerivedData/MyProject-ajtusdfivjqtabgvzfuzqifdjuis/Build/Intermediates/PrecompiledHeaders/MyProject-Prefix-eouuweehlrhtjxdsrgwseamnhnna/MyProject-Prefix.pch.d </code></pre>
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    1. USSteve Simitzis
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      1. USAndreas Zollmann
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    1. COdid you turn on arc ? Objective-C automatic reference Counting variables set to YES??
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    2. COWhich files are u setting non arc on them?
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      1. POCombining ARC and non-ARC files not working
      1. USOmar Abdelhafith
    3. COBring up the target's build settings and show "Levels". This way you'll see on a target basis whether any funny settings are overriding ARC at some point. `-fno-obj-arc` should only override the final decision on a file basis.
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      1. USJesper
 

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