| commit 2497d5aa7716a664c4f73df1980b026c906c7522 |
| Author: Manoj Gupta <manojgupta@google.com> |
| Date: Tue Oct 25 12:29:03 2022 -0700 |
| |
| Define _GNU_SOURCE for arm baremetal in C++ mode. |
| |
| This matches other C++ drivers e.g. Linux that define |
| _GNU_SOURCE. This lets clang compiler more code by default |
| without explicitly passing _GNU_SOURCE on command line. |
| |
| Reviewed By: MaskRay |
| |
| Differential Revision: https://reviews.llvm.org/D136712 |
| |
| diff --git a/clang/lib/Basic/Targets/ARM.cpp b/clang/lib/Basic/Targets/ARM.cpp |
| index f2db186aac4c..c38849058e13 100644 |
| --- a/clang/lib/Basic/Targets/ARM.cpp |
| +++ b/clang/lib/Basic/Targets/ARM.cpp |
| @@ -705,8 +705,11 @@ void ARMTargetInfo::getTargetDefines(const LangOptions &Opts, |
| // For bare-metal none-eabi. |
| if (getTriple().getOS() == llvm::Triple::UnknownOS && |
| (getTriple().getEnvironment() == llvm::Triple::EABI || |
| - getTriple().getEnvironment() == llvm::Triple::EABIHF)) |
| + getTriple().getEnvironment() == llvm::Triple::EABIHF)) { |
| Builder.defineMacro("__ELF__"); |
| + if (Opts.CPlusPlus) |
| + Builder.defineMacro("_GNU_SOURCE"); |
| + } |
| |
| // Target properties. |
| Builder.defineMacro("__REGISTER_PREFIX__", ""); |
| diff --git a/clang/test/Preprocessor/init-arm.c b/clang/test/Preprocessor/init-arm.c |
| index e317ffa67393..a55d0d63a79b 100644 |
| --- a/clang/test/Preprocessor/init-arm.c |
| +++ b/clang/test/Preprocessor/init-arm.c |
| @@ -1450,3 +1450,8 @@ |
| |
| // THUMB-MINGW:#define __ARM_DWARF_EH__ 1 |
| |
| +// RUN: %clang_cc1 -E -dM -ffreestanding -triple=thumbv6m-none-unknown-eabi < /dev/null | FileCheck -match-full-lines -check-prefix Thumbv6m-elf %s |
| +// Thumbv6m-elf: #define __ELF__ 1 |
| + |
| +// RUN: %clang_cc1 -x c++ -E -dM -ffreestanding -triple=thumbv6m-none-unknown-eabi < /dev/null | FileCheck -match-full-lines -check-prefix Thumbv6m-cxx %s |
| +// Thumbv6m-cxx: #define _GNU_SOURCE 1 |
