Weird. Ok. On Sat, Feb 16, 2019, 5:20 PM Petr Hosek via Phabricator < revi...@reviews.llvm.org> wrote:
> phosek created this revision. > phosek added reviewers: echristo, mcgrathr. > Herald added a project: clang. > Herald added a subscriber: cfe-commits. > > This can be used to disable libc linking. This flag is supported by > GCC since version 9 as well as some Clang target toolchains. > > > Repository: > rC Clang > > https://reviews.llvm.org/D58326 > > Files: > clang/lib/Driver/ToolChains/Gnu.cpp > clang/test/Driver/nodefaultlib.c > clang/test/Driver/nolibc.c > > > Index: clang/test/Driver/nolibc.c > =================================================================== > --- /dev/null > +++ clang/test/Driver/nolibc.c > @@ -0,0 +1,5 @@ > +// RUN: %clang -target i686-pc-linux-gnu -### -rtlib=libgcc -nolibc %s > 2>&1 | FileCheck %s > +// CHECK: crtbegin > +// CHECK: "-lgcc" > +// CHECK-NOT: "-lc" > +// CHECK: crtend > Index: clang/test/Driver/nodefaultlib.c > =================================================================== > --- clang/test/Driver/nodefaultlib.c > +++ clang/test/Driver/nodefaultlib.c > @@ -1,4 +1,4 @@ > -// RUN: %clang -target i686-pc-linux-gnu -### -nodefaultlibs %s 2>&1 | > FileCheck -check-prefix=TEST1 %s > +// RUN: %clang -target i686-pc-linux-gnu -### -rtlib=libgcc > -nodefaultlibs %s 2>&1 | FileCheck -check-prefix=TEST1 %s > // TEST1-NOT: start-group > // TEST1-NOT: "-lgcc" > // TEST1-NOT: "-lc" > Index: clang/lib/Driver/ToolChains/Gnu.cpp > =================================================================== > --- clang/lib/Driver/ToolChains/Gnu.cpp > +++ clang/lib/Driver/ToolChains/Gnu.cpp > @@ -518,7 +518,8 @@ > if (Args.hasArg(options::OPT_fsplit_stack)) > CmdArgs.push_back("--wrap=pthread_create"); > > - CmdArgs.push_back("-lc"); > + if (!Args.hasArg(options::OPT_nolibc)) > + CmdArgs.push_back("-lc"); > > // Add IAMCU specific libs, if needed. > if (IsIAMCU) > > >
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