================
@@ -851,6 +851,28 @@ static void InitializePredefinedMacros(const TargetInfo
&TI,
Twine(getClangFullCPPVersion()) + "\"");
// Initialize language-specific preprocessor defines.
+ if (LangOpts.getStdlibHardeningMode()) {
+ const char *StdlibHardeningStr;
+
+ switch (LangOpts.getStdlibHardeningMode()) {
+ case clang::LangOptions::STDLIB_HARDENING_MODE_NOT_SPECIFIED:
+ llvm_unreachable("Unexpected libc++ hardening mode value");
+ case clang::LangOptions::STDLIB_HARDENING_MODE_NONE:
+ StdlibHardeningStr = "_STDLIB_HARDENING_MODE_NONE";
----------------
ldionne wrote:
The macros used by libc++ are `_LIBCPP_HARDENING_MODE`,
`_LIBCPP_HARDENING_MODE_NONE` & al. While the naming of the clang option should
use the "any standard library" terminology, the actual macros we set must be
the libc++ ones. If libstdc++ had something similar in the future, we would
switch to:
```c++
if (LangOpts.getStdlibHardeningMode()) {
if (stdlib is libc++) {
set-macros-for-libcxx;
} else {
set-macros-for-libstdcxx;
}
}
```
https://github.com/llvm/llvm-project/pull/78763
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