[clang] OpenBSD does not support C11 atomics or threads.

llvm · Sep 4, 2021 · d8cd780 · d8cd780
1 parent c7f50a4
commit d8cd780
Show file tree

Hide file tree

Showing 2 changed files with 15 additions and 0 deletions.
diff --git a/clang/lib/Basic/Targets/OSTargets.h b/clang/lib/Basic/Targets/OSTargets.h
@@ -462,6 +462,11 @@ class LLVM_LIBRARY_VISIBILITY OpenBSDTargetInfo : public OSTargetInfo<Target> {
  Builder.defineMacro("__FLOAT128__");
  }
 
+ if (Opts.C11) {
+ Builder.defineMacro("__STDC_NO_ATOMICS__");
+ Builder.defineMacro("__STDC_NO_THREADS__");
+ }
+
 public:
  OpenBSDTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
  : OSTargetInfo<Target>(Triple, Opts) {

diff --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
@@ -1464,6 +1464,16 @@
 // OPENBSD:#define __WCHAR_TYPE__ int
 // OPENBSD:#define __WINT_TYPE__ int
 //
+// RUN: %clang_cc1 -x c -std=c11 -E -dM -ffreestanding -triple=amd64-unknown-openbsd < /dev/null | FileCheck -match-full-lines -check-prefix OPENBSD-STDC %s
+// RUN: %clang_cc1 -x c -std=gnu11 -E -dM -ffreestanding -triple=amd64-unknown-openbsd < /dev/null | FileCheck -match-full-lines -check-prefix OPENBSD-STDC %s
+// RUN: %clang_cc1 -x c -std=c17 -E -dM -ffreestanding -triple=amd64-unknown-openbsd < /dev/null | FileCheck -match-full-lines -check-prefix OPENBSD-STDC %s
+// OPENBSD-STDC:#define __STDC_NO_ATOMICS__ 1
+// OPENBSD-STDC:#define __STDC_NO_THREADS__ 1
+//
+// RUN: %clang_cc1 -x c -std=c99 -E -dM -ffreestanding -triple=amd64-unknown-openbsd < /dev/null | FileCheck -match-full-lines -check-prefix OPENBSD-STDC-N %s
+// OPENBSD-STDC-N-NOT:#define __STDC_NO_ATOMICS__ 1
+// OPENBSD-STDC-N-NOT:#define __STDC_NO_THREADS__ 1
+//
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=xcore-none-none < /dev/null | FileCheck -match-full-lines -check-prefix XCORE %s
 // XCORE:#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
 // XCORE:#define __LITTLE_ENDIAN__ 1