Dominik Montada via llvm-dev
2020-May-19 05:26 UTC
[llvm-dev] [libcxx-dev] "Unknown warning" error when trying to compile libcxx tests for remote, bare-metal target
CC'ing llvm-dev for more visibility. Original message below. Am 18.05.20 um 14:31 schrieb Dominik Montada via libcxx-dev:> Hi there, > > I'm trying to set up the libcxx tests to run on a remote, bare-metal > target and am running into some issues with an unknown warning error: > > error: unknown warning option '-Wno-aligned-allocation-unavailable'; > did you mean '-Wno-debug-compression-unavailable'? > [-Werror,-Wunknown-warning-option] > > It seems this flag should only get added to the compile options if it > is supported through line 673 in config.py: > > self.cxx.addWarningFlagIfSupported('-Wno-aligned-allocation-unavailable') > > So I'm wondering why I still get the error message then, if it is > apparently supported? > > I have created <Target>RemoteTI in target_info.py and call llvm-lit > with the following command line parameters from the libcxx root folder: > > -sv --param target_triple=<triple> --param compile_flags="<some > additional flags>" ./test > > My custom target info is also defining some target specific compile > flags. > > Some very shallow, initial digging around leads me to suspect the > -nostdinc flag that I'm setting in my target info. I need this flag > since our internal backend does not set any default include paths yet > and without it, clang tries to include my host system headers, which > then leads to an include error. However I am unsure if the > preprocessor triggers this error before clang checks for unknown > warning options, therefore hiding the actual problem. > > While I could circumvent the error by setting --param > enable_warnings=false I would prefer to not use this workaround and > instead fix the actual problem. > > Is there something that I'm missing here or is this a bug in the > regression test suite? > > Regards, > > Dominik > > > _______________________________________________ > libcxx-dev mailing list > libcxx-dev at lists.llvm.org > https://lists.llvm.org/cgi-bin/mailman/listinfo/libcxx-dev-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200519/626b4e42/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 5409 bytes Desc: not available URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200519/626b4e42/attachment.bin>