Author: yamaguchi Date: Fri Jun 16 11:01:13 2017 New Revision: 305561 URL: http://llvm.org/viewvc/llvm-project?rev=305561&view=rev Log: Fix a bug that warnings generated with -M or -MM flags
This is a patch for bug: https://bugs.llvm.org/show_bug.cgi?id=6817 Warnings should not be emitted with -M and -MM flags, because this mode is only used for generate MakeFiles. Modified: cfe/trunk/lib/Driver/ToolChains/Clang.cpp cfe/trunk/test/Driver/m_and_mm.c Modified: cfe/trunk/lib/Driver/ToolChains/Clang.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Clang.cpp?rev=305561&r1=305560&r2=305561&view=diff ============================================================================== --- cfe/trunk/lib/Driver/ToolChains/Clang.cpp (original) +++ cfe/trunk/lib/Driver/ToolChains/Clang.cpp Fri Jun 16 11:01:13 2017 @@ -980,6 +980,9 @@ void Clang::AddPreprocessingOptions(Comp DepTarget = Args.MakeArgString(llvm::sys::path::filename(P)); } + if (!A->getOption().matches(options::OPT_MD) && !A->getOption().matches(options::OPT_MMD)) { + CmdArgs.push_back("-w"); + } CmdArgs.push_back("-MT"); SmallString<128> Quoted; QuoteTarget(DepTarget, Quoted); Modified: cfe/trunk/test/Driver/m_and_mm.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/m_and_mm.c?rev=305561&r1=305560&r2=305561&view=diff ============================================================================== --- cfe/trunk/test/Driver/m_and_mm.c (original) +++ cfe/trunk/test/Driver/m_and_mm.c Fri Jun 16 11:01:13 2017 @@ -1,3 +1,15 @@ // RUN: %clang -### \ // RUN: -M -MM %s 2> %t // RUN: not grep '"-sys-header-deps"' %t + +// RUN: %clang -M -MM %s 2> %t +// RUN: not grep "warning" %t + +// RUN: %clang -MMD -MD %s 2> %t +// RUN: grep "warning" %t + +#warning "This warning shouldn't show up with -M and -MM" +int main (void) +{ + return 0; +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits