https://github.com/llvmbot created
https://github.com/llvm/llvm-project/pull/154897
Backport 0fff4605922d137252875f072b3fb2973dbf9693
Requested by: @brad0
>From 0fe516b9350e5a08ee24a2be318d0971c1b2b0b3 Mon Sep 17 00:00:00 2001
From: Brad Smith <b...@comstyle.com>
Date: Fri, 22 Aug 2025 02:02:52 -0400
Subject: [PATCH] [Driver] DragonFly does not support C11 threads (#154886)
(cherry picked from commit 0fff4605922d137252875f072b3fb2973dbf9693)
---
clang/lib/Basic/Targets/OSTargets.h | 3 +++
clang/test/Preprocessor/init.c | 8 ++++++++
2 files changed, 11 insertions(+)
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
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