[llvm-branch-commits] [clang] b95cfa4 - [Driver] DragonFly does not support C11 threads (#154886)

[Tobias Hieta via llvm-branch-commits]

Author: Brad Smith
Date: 2025-08-25T16:32:43+02:00
New Revision: b95cfa4014702c49b2cd58cfe22987f22369ce58

URL: https://github.com/llvm/llvm-project/commit/b95cfa4014702c49b2cd58cfe22987f22369ce58
DIFF: https://github.com/llvm/llvm-project/commit/b95cfa4014702c49b2cd58cfe22987f22369ce58.diff

LOG: [Driver] DragonFly does not support C11 threads (#154886)

(cherry picked from commit 0fff4605922d137252875f072b3fb2973dbf9693)

Added: 
    

Modified: 
    clang/lib/Basic/Targets/OSTargets.h
    clang/test/Preprocessor/init.c

Removed: 
    


################################################################################
diff  --git a/clang/lib/Basic/Targets/OSTargets.h b/clang/lib/Basic/Targets/OSTargets.h
index 97b2caa22d8e4..c1a68f464e831 100644
--- a/clang/lib/Basic/Targets/OSTargets.h
+++ b/clang/lib/Basic/Targets/OSTargets.h
@@ -174,6 +174,9 @@ class LLVM_LIBRARY_VISIBILITY DragonFlyBSDTargetInfo
     DefineStd(Builder, "unix", Opts);
     if (this->HasFloat128)
       Builder.defineMacro("__FLOAT128__");
+
+    if (Opts.C11)
+      Builder.defineMacro("__STDC_NO_THREADS__");
   }
 
 public:

diff  --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
index bed39dc3e34dc..7e0df96141364 100644
--- a/clang/test/Preprocessor/init.c
+++ b/clang/test/Preprocessor/init.c
@@ -1622,6 +1622,14 @@
 // 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_THREADS__ 1
 //
+// RUN: %clang_cc1 -x c -std=c11 -E -dM -ffreestanding -triple=x86_64-unknown-dragonfly < /dev/null | FileCheck -match-full-lines -check-prefix DRAGONFLY-STDC %s
+// RUN: %clang_cc1 -x c -std=gnu11 -E -dM -ffreestanding -triple=x86_64-unknown-dragonfly < /dev/null | FileCheck -match-full-lines -check-prefix DRAGONFLY-STDC %s
+// RUN: %clang_cc1 -x c -std=c17 -E -dM -ffreestanding -triple=x86_64-unknown-dragonfly < /dev/null | FileCheck -match-full-lines -check-prefix DRAGONFLY-STDC %s
+// DRAGONFLY-STDC:#define __STDC_NO_THREADS__ 1
+//
+// RUN: %clang_cc1 -x c -std=c99 -E -dM -ffreestanding -triple=x86_64-unknown-dragonfly < /dev/null | FileCheck -match-full-lines -check-prefix DRAGONFLY-STDC-N %s
+// DRAGONFLY-STDC-N-NOT:#define __STDC_NO_THREADS__ 1
+//
 // RUN: %clang_cc1 -triple=aarch64-unknown-managarm-mlibc -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix MANAGARM %s
 // RUN: %clang_cc1 -triple=riscv64-unknown-managarm-mlibc -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix MANAGARM %s
 // RUN: %clang_cc1 -triple=x86_64-unknown-managarm-mlibc -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix MANAGARM %s