caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[clang][Darwin] Always set the default C++ Standard Library to libc++

Browse Source 
Newer SDKs don't even provide libstdc++ headers, so it's effectively
never valid to build for libstdc++ unless the user explicitly asks
for it (in which case they will need to provide include paths and more).
This commit is contained in:
Louis Dionne
2022-08-03 14:20:02 -04:00
parent b3335e8ed7
commit c5ccb78ade
3 changed files with 8 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
clang/lib/Driver/ToolChains/Darwin.cpp
View File

@@ -896,12 +896,7 @@ types::ID MachO::LookupTypeForExtension(StringRef Ext) const {
bool MachO::HasNativeLLVMSupport() const { return true; }
ToolChain::CXXStdlibType Darwin::GetDefaultCXXStdlibType() const {
// Use libstdc++ on old targets (OSX < 10.9 and iOS < 7)
if ((isTargetMacOSBased() && isMacosxVersionLT(10, 9)) ||
(isTargetIOSBased() && isIPhoneOSVersionLT(7, 0)))
return ToolChain::CST_Libstdcxx;
// On all other targets, use libc++
// Always use libc++ by default
return ToolChain::CST_Libcxx;
}

2
clang/test/Driver/darwin-iphone-defaults.m
View File

@@ -1,4 +1,4 @@
// RUN: %clang -target i386-apple-darwin9 -miphoneos-version-min=3.0 -arch armv7 -stdlib=platform -flto -S -o - %s | FileCheck %s
// RUN: %clang -target i386-apple-darwin -miphoneos-version-min=5.0 -arch armv7 -stdlib=platform -flto -S -o - %s | FileCheck %s
// CHECK: @f0() [[F0:#[0-9]+]]
// CHECK: @__f0_block_invoke

15
clang/test/Driver/darwin-stdlib.cpp
View File

@@ -2,13 +2,10 @@
// than the platform default. (see https://llvm.org/bugs/show_bug.cgi?id=30548)
// XFAIL: default-cxx-stdlib-set
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -arch arm64 -miphoneos-version-min=7.0 %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LIBCXX
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -mmacosx-version-min=10.8 -Wno-stdlibcxx-not-found %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LIBSTDCXX
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -mmacosx-version-min=10.9 %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LIBCXX
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -arch armv7s -miphoneos-version-min=6.1 -Wno-stdlibcxx-not-found %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LIBSTDCXX
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -arch armv7s -miphoneos-version-min=7.0 %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LIBCXX
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -arch armv7k %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LIBCXX
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -arch arm64 -miphoneos-version-min=7.0 %s -### 2>&1 | FileCheck %s
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -mmacosx-version-min=10.9 %s -### 2>&1 | FileCheck %s
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -arch armv7s -miphoneos-version-min=7.0 %s -### 2>&1 | FileCheck %s
// RUN: %clang -target x86_64-apple-darwin -ccc-install-dir %S/Inputs/darwin_toolchain_tree/bin/ -arch armv7k %s -### 2>&1 | FileCheck %s
// CHECK-LIBCXX: "-stdlib=libc++"
// CHECK-LIBSTDCXX-NOT: -stdlib=libc++
// CHECK-LIBSTDCXX-NOT: -stdlib=libstdc++
// CHECK: "-stdlib=libc++"
// CHECK-NOT: "-stdlib=libstdc++"