[llvm] 20b0e0a - [gn build] Stop defining GTEST_LANG_CXX11, pass /Zc:__cplusplus with msvc
Nico Weber via llvm-commits
llvm-commits at lists.llvm.org
Tue Nov 15 07:57:24 PST 2022
Author: Nico Weber
Date: 2022-11-15T10:56:53-05:00
New Revision: 20b0e0a71a333842e13f292c1d224877be6fe538
URL: https://github.com/llvm/llvm-project/commit/20b0e0a71a333842e13f292c1d224877be6fe538
DIFF: https://github.com/llvm/llvm-project/commit/20b0e0a71a333842e13f292c1d224877be6fe538.diff
LOG: [gn build] Stop defining GTEST_LANG_CXX11, pass /Zc:__cplusplus with msvc
Ports:
* https://reviews.llvm.org/D84023
* https://reviews.llvm.org/rG4f5ccc72f6a6e
(but see https://reviews.llvm.org/rG4901199f5b84b223)
No intended behavior change.
Added:
Modified:
llvm/utils/gn/build/BUILD.gn
llvm/utils/gn/secondary/third-party/unittest/BUILD.gn
Removed:
################################################################################
diff --git a/llvm/utils/gn/build/BUILD.gn b/llvm/utils/gn/build/BUILD.gn
index 522f54f734da5..827f382910e30 100644
--- a/llvm/utils/gn/build/BUILD.gn
+++ b/llvm/utils/gn/build/BUILD.gn
@@ -183,6 +183,12 @@ config("compiler_defaults") {
cflags += [ "/EHs-c-" ]
cflags_cc += [ "/std:c++17" ]
+ # cl.exe doesn't set __cplusplus correctly by default.
+ # clang-cl gets it right by default, so don't needlessly add the flag there.
+ if (!is_clang) {
+ cflags_cc += [ "/Zc:__cplusplus" ]
+ }
+
# The MSVC default value (1 MB) is not enough for parsing recursive C++
# templates in Clang.
ldflags += [ "/STACK:10000000" ]
diff --git a/llvm/utils/gn/secondary/third-party/unittest/BUILD.gn b/llvm/utils/gn/secondary/third-party/unittest/BUILD.gn
index 844e43c856f4f..d4efb45ec4b55 100644
--- a/llvm/utils/gn/secondary/third-party/unittest/BUILD.gn
+++ b/llvm/utils/gn/secondary/third-party/unittest/BUILD.gn
@@ -7,9 +7,7 @@ config("googletest_config") {
"googletest/include",
]
- # LLVM requires C++11 but gtest doesn't correctly detect the availability
- # of C++11 on MSVC, so we force it on.
- defines = [ "GTEST_LANG_CXX11" ]
+ defines = []
if (host_os == "win") {
defines += [ "GTEST_OS_WINDOWS" ]
}
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