[Driver][Gnu] Support -nolibc flag
This can be used to disable libc linking. This flag is supported by
GCC since version 9 as well as some Clang target toolchains.
Differential Revision: https://reviews.llvm.org/D58326
llvm-svn: 354210
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index e94a895..6eb8fe2 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/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)