Bug 141912 – Weak symbol warning when linking TestWebKitAPI

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Brian Burg]

I started noticing this issue a while ago, I think it was before the full switch away from WebCore.exp.in but I'm not sure. I have done several full builds since then IIRC. Full output as follows:

=== BUILD TARGET TestWebKitAPI OF PROJECT TestWebKitAPI WITH CONFIGURATION Release ===

Check dependencies
DebugRelease.xcconfig line 23: Unable to find included file "../../../../Internal/Configurations/HaveInternalSDK.xcconfig"

Ld /Users/burg/repos/replay-staging/OpenSource/WebKitBuild/Release/TestWebKitAPI normal x86_64
    cd /Users/burg/repos/replay-staging/OpenSource/Tools/TestWebKitAPI
    export MACOSX_DEPLOYMENT_TARGET=10.10
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -L/Users/burg/repos/replay-staging/OpenSource/WebKitBuild/Release -F/Users/burg/repos/replay-staging/OpenSource/WebKitBuild/Release -F/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Quartz.framework/Frameworks -F/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks -F/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks -filelist /Users/burg/repos/replay-staging/OpenSource/WebKitBuild/TestWebKitAPI.build/Release/TestWebKitAPI.build/Objects-normal/x86_64/TestWebKitAPI.LinkFileList -Xlinker --no-demangle -mmacosx-version-min=10.10 -lgtest -force_load /Users/burg/repos/replay-staging/OpenSource/WebKitBuild/Release/libTestWebKitAPI.a -framework JavaScriptCore -framework WebKit -framework WebKit2 -framework Cocoa -framework Carbon -stdlib=libc++ -fobjc-link-runtime -Xlinker -dependency_info -Xlinker /Users/burg/repos/replay-staging/OpenSource/WebKitBuild/TestWebKitAPI.build/Release/TestWebKitAPI.build/Objects-normal/x86_64/TestWebKitAPI_dependency_info.dat -o /Users/burg/repos/replay-staging/OpenSource/WebKitBuild/Release/TestWebKitAPI
ld: warning: direct access in __GLOBAL__I_a to global weak symbol __ZN7testing4Test13SetUpTestCaseEv means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
ld: warning: direct access in __GLOBAL__I_a to global weak symbol __ZN7testing4Test16TearDownTestCaseEv means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.

[Alex Christensen]

I'm pretty sure that I did indeed cause this when I switched away from WebCore.exp.in.  This doesn't seem to be breaking any builds, but this should be fixed along with the final cleaning up from that switch.

[Alex Christensen]

Created attachment 247907 [details]
Patch

[David Kilzer (:ddkilzer)]

Comment on attachment 247907 [details]
Patch

r=me

[WebKit Commit Bot]

Comment on attachment 247907 [details]
Patch

Clearing flags on attachment: 247907

Committed r181054: <http://trac.webkit.org/changeset/181054>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[WebKit Commit Bot]

Re-opened since this is blocked by bug 142320

[Alex Christensen]

Created attachment 247978 [details]
Patch

[Alex Christensen]

The previous patch broke some API tests even though it compiled correctly.  I'm honestly not sure why.

This patch compiles correctly and doesn't break run-api-tests.

[David Kilzer (:ddkilzer)]

Comment on attachment 247978 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=247978&action=review

r=me

> Tools/TestWebKitAPI/Configurations/TestWebKitAPI.xcconfig:27
> +UNEXPORTED_SYMBOL_LDFLAGS = -Wl,-unexported_symbol -Wl,__ZN7testing4Test16TearDownTestCaseEv -Wl,-unexported_symbol -Wl,__ZN7testing4Test13SetUpTestCaseEv

If we have to add more of these symbols in the future, we should put them in an *.unexp file.  This is slightly ugly to maintain.

[WebKit Commit Bot]

Comment on attachment 247978 [details]
Patch

Clearing flags on attachment: 247978

Committed r181113: <http://trac.webkit.org/changeset/181113>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.