[clang] [llvm] [Darwin][Driver][clang] apple-none-macho orders the resource directory after internal-externc-isystem when nostdlibinc is used (PR #120507)
Ian Anderson via llvm-commits
llvm-commits at lists.llvm.org
Thu Jan 2 17:11:54 PST 2025
https://github.com/ian-twilightcoder updated https://github.com/llvm/llvm-project/pull/120507
>From 637a7b3dafdfdba107f8d5c8193fb6e10403a1e8 Mon Sep 17 00:00:00 2001
From: Ian Anderson <iana at apple.com>
Date: Wed, 18 Dec 2024 16:31:19 -0800
Subject: [PATCH] [Darwin][Driver][clang] apple-none-macho orders the resource
directory after internal-externc-isystem when nostdlibinc is used
Embedded development often needs to use a different C standard library, replacing the existing one normally passed as -internal-externc-isystem. This works fine for an apple-macos target, but apple-none-macho doesn't work because the MachO driver doesn't implement AddClangSystemIncludeArgs to add the resource directory as -internal-isystem like most other drivers do. Move most of the search path logic from Darwin and DarwinClang down into an AppleMachO toolchain between the MachO and Darwin toolchains.
Also define __MACH__ for apple-none-macho, as Swift expects all MachO targets to have that defined.
---
clang/lib/Basic/Targets/OSTargets.cpp | 3 -
clang/lib/Driver/Driver.cpp | 2 +
clang/lib/Driver/ToolChains/Darwin.cpp | 116 ++++++++++--------
clang/lib/Driver/ToolChains/Darwin.h | 72 +++++++----
clang/lib/Frontend/InitPreprocessor.cpp | 5 +
clang/lib/Lex/InitHeaderSearch.cpp | 2 +-
.../MacOSX15.1.sdk/embedded/usr/include/.keep | 0
.../embedded/usr/local/include/.keep | 0
.../MacOSX15.1.sdk/usr/include/c++/v1/.keep | 0
.../MacOSX15.1.sdk/usr/local/include/.keep | 0
.../Driver/darwin-embedded-search-paths.c | 43 +++++++
.../Preprocessor/macho-embedded-predefines.c | 6 +-
llvm/include/llvm/TargetParser/Triple.h | 5 +
13 files changed, 170 insertions(+), 84 deletions(-)
create mode 100644 clang/test/Driver/Inputs/MacOSX15.1.sdk/embedded/usr/include/.keep
create mode 100644 clang/test/Driver/Inputs/MacOSX15.1.sdk/embedded/usr/local/include/.keep
create mode 100644 clang/test/Driver/Inputs/MacOSX15.1.sdk/usr/include/c++/v1/.keep
create mode 100644 clang/test/Driver/Inputs/MacOSX15.1.sdk/usr/local/include/.keep
create mode 100644 clang/test/Driver/darwin-embedded-search-paths.c
diff --git a/clang/lib/Basic/Targets/OSTargets.cpp b/clang/lib/Basic/Targets/OSTargets.cpp
index 88c054150ab224..6f98353fb8c2e4 100644
--- a/clang/lib/Basic/Targets/OSTargets.cpp
+++ b/clang/lib/Basic/Targets/OSTargets.cpp
@@ -114,9 +114,6 @@ void getDarwinDefines(MacroBuilder &Builder, const LangOptions &Opts,
assert(OsVersion.getMinor().value_or(0) < 100 &&
OsVersion.getSubminor().value_or(0) < 100 && "Invalid version!");
Builder.defineMacro("__ENVIRONMENT_OS_VERSION_MIN_REQUIRED__", Str);
-
- // Tell users about the kernel if there is one.
- Builder.defineMacro("__MACH__");
}
PlatformMinVersion = OsVersion;
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index dc84c1b9d1cc4e..01d987d3c0669e 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -6603,6 +6603,8 @@ const ToolChain &Driver::getToolChain(const ArgList &Args,
TC = std::make_unique<toolchains::BareMetal>(*this, Target, Args);
else if (Target.isOSBinFormatELF())
TC = std::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
+ else if (Target.isAppleMachO())
+ TC = std::make_unique<toolchains::AppleMachO>(*this, Target, Args);
else if (Target.isOSBinFormatMachO())
TC = std::make_unique<toolchains::MachO>(*this, Target, Args);
else
diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp
index 4105d38d15d7d8..fe5c092eead0c2 100644
--- a/clang/lib/Driver/ToolChains/Darwin.cpp
+++ b/clang/lib/Driver/ToolChains/Darwin.cpp
@@ -966,10 +966,14 @@ MachO::MachO(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
getProgramPaths().push_back(getDriver().Dir);
}
+AppleMachO::AppleMachO(const Driver &D, const llvm::Triple &Triple,
+ const ArgList &Args)
+ : MachO(D, Triple, Args), CudaInstallation(D, Triple, Args),
+ RocmInstallation(D, Triple, Args) {}
+
/// Darwin - Darwin tool chain for i386 and x86_64.
Darwin::Darwin(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
- : MachO(D, Triple, Args), TargetInitialized(false),
- CudaInstallation(D, Triple, Args), RocmInstallation(D, Triple, Args) {}
+ : AppleMachO(D, Triple, Args), TargetInitialized(false) {}
types::ID MachO::LookupTypeForExtension(StringRef Ext) const {
types::ID Ty = ToolChain::LookupTypeForExtension(Ext);
@@ -1018,13 +1022,13 @@ bool Darwin::hasBlocksRuntime() const {
}
}
-void Darwin::AddCudaIncludeArgs(const ArgList &DriverArgs,
- ArgStringList &CC1Args) const {
+void AppleMachO::AddCudaIncludeArgs(const ArgList &DriverArgs,
+ ArgStringList &CC1Args) const {
CudaInstallation->AddCudaIncludeArgs(DriverArgs, CC1Args);
}
-void Darwin::AddHIPIncludeArgs(const ArgList &DriverArgs,
- ArgStringList &CC1Args) const {
+void AppleMachO::AddHIPIncludeArgs(const ArgList &DriverArgs,
+ ArgStringList &CC1Args) const {
RocmInstallation->AddHIPIncludeArgs(DriverArgs, CC1Args);
}
@@ -1119,6 +1123,8 @@ VersionTuple MachO::getLinkerVersion(const llvm::opt::ArgList &Args) const {
Darwin::~Darwin() {}
+AppleMachO::~AppleMachO() {}
+
MachO::~MachO() {}
std::string Darwin::ComputeEffectiveClangTriple(const ArgList &Args,
@@ -2482,7 +2488,7 @@ static void AppendPlatformPrefix(SmallString<128> &Path,
// Returns the effective sysroot from either -isysroot or --sysroot, plus the
// platform prefix (if any).
llvm::SmallString<128>
-DarwinClang::GetEffectiveSysroot(const llvm::opt::ArgList &DriverArgs) const {
+AppleMachO::GetEffectiveSysroot(const llvm::opt::ArgList &DriverArgs) const {
llvm::SmallString<128> Path("/");
if (DriverArgs.hasArg(options::OPT_isysroot))
Path = DriverArgs.getLastArgValue(options::OPT_isysroot);
@@ -2495,8 +2501,9 @@ DarwinClang::GetEffectiveSysroot(const llvm::opt::ArgList &DriverArgs) const {
return Path;
}
-void DarwinClang::AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
- llvm::opt::ArgStringList &CC1Args) const {
+void AppleMachO::AddClangSystemIncludeArgs(
+ const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const {
const Driver &D = getDriver();
llvm::SmallString<128> Sysroot = GetEffectiveSysroot(DriverArgs);
@@ -2574,7 +2581,7 @@ bool DarwinClang::AddGnuCPlusPlusIncludePaths(const llvm::opt::ArgList &DriverAr
return getVFS().exists(Base);
}
-void DarwinClang::AddClangCXXStdlibIncludeArgs(
+void AppleMachO::AddClangCXXStdlibIncludeArgs(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const {
// The implementation from a base class will pass through the -stdlib to
@@ -2631,55 +2638,60 @@ void DarwinClang::AddClangCXXStdlibIncludeArgs(
}
case ToolChain::CST_Libstdcxx:
- llvm::SmallString<128> UsrIncludeCxx = Sysroot;
- llvm::sys::path::append(UsrIncludeCxx, "usr", "include", "c++");
-
- llvm::Triple::ArchType arch = getTriple().getArch();
- bool IsBaseFound = true;
- switch (arch) {
- default: break;
-
- case llvm::Triple::x86:
- case llvm::Triple::x86_64:
- IsBaseFound = AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args, UsrIncludeCxx,
- "4.2.1",
- "i686-apple-darwin10",
- arch == llvm::Triple::x86_64 ? "x86_64" : "");
- IsBaseFound |= AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args, UsrIncludeCxx,
- "4.0.0", "i686-apple-darwin8",
- "");
- break;
+ AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args);
+ break;
+ }
+}
- case llvm::Triple::arm:
- case llvm::Triple::thumb:
- IsBaseFound = AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args, UsrIncludeCxx,
- "4.2.1",
- "arm-apple-darwin10",
- "v7");
- IsBaseFound |= AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args, UsrIncludeCxx,
- "4.2.1",
- "arm-apple-darwin10",
- "v6");
- break;
+void AppleMachO::AddGnuCPlusPlusIncludePaths(
+ const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const {}
- case llvm::Triple::aarch64:
- IsBaseFound = AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args, UsrIncludeCxx,
- "4.2.1",
- "arm64-apple-darwin10",
- "");
- break;
- }
+void DarwinClang::AddGnuCPlusPlusIncludePaths(
+ const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const {
+ llvm::SmallString<128> UsrIncludeCxx = GetEffectiveSysroot(DriverArgs);
+ llvm::sys::path::append(UsrIncludeCxx, "usr", "include", "c++");
- if (!IsBaseFound) {
- getDriver().Diag(diag::warn_drv_libstdcxx_not_found);
- }
+ llvm::Triple::ArchType arch = getTriple().getArch();
+ bool IsBaseFound = true;
+ switch (arch) {
+ default:
+ break;
+ case llvm::Triple::x86:
+ case llvm::Triple::x86_64:
+ IsBaseFound = AddGnuCPlusPlusIncludePaths(
+ DriverArgs, CC1Args, UsrIncludeCxx, "4.2.1", "i686-apple-darwin10",
+ arch == llvm::Triple::x86_64 ? "x86_64" : "");
+ IsBaseFound |= AddGnuCPlusPlusIncludePaths(
+ DriverArgs, CC1Args, UsrIncludeCxx, "4.0.0", "i686-apple-darwin8", "");
+ break;
+
+ case llvm::Triple::arm:
+ case llvm::Triple::thumb:
+ IsBaseFound =
+ AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args, UsrIncludeCxx, "4.2.1",
+ "arm-apple-darwin10", "v7");
+ IsBaseFound |=
+ AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args, UsrIncludeCxx, "4.2.1",
+ "arm-apple-darwin10", "v6");
+ break;
+
+ case llvm::Triple::aarch64:
+ IsBaseFound =
+ AddGnuCPlusPlusIncludePaths(DriverArgs, CC1Args, UsrIncludeCxx, "4.2.1",
+ "arm64-apple-darwin10", "");
break;
}
+
+ if (!IsBaseFound) {
+ getDriver().Diag(diag::warn_drv_libstdcxx_not_found);
+ }
}
-void DarwinClang::AddCXXStdlibLibArgs(const ArgList &Args,
- ArgStringList &CmdArgs) const {
+void AppleMachO::AddCXXStdlibLibArgs(const ArgList &Args,
+ ArgStringList &CmdArgs) const {
CXXStdlibType Type = GetCXXStdlibType(Args);
switch (Type) {
@@ -3615,7 +3627,7 @@ SanitizerMask Darwin::getSupportedSanitizers() const {
return Res;
}
-void Darwin::printVerboseInfo(raw_ostream &OS) const {
+void AppleMachO::printVerboseInfo(raw_ostream &OS) const {
CudaInstallation->print(OS);
RocmInstallation->print(OS);
}
diff --git a/clang/lib/Driver/ToolChains/Darwin.h b/clang/lib/Driver/ToolChains/Darwin.h
index 2e55b49682a7e9..576dad28c2bda2 100644
--- a/clang/lib/Driver/ToolChains/Darwin.h
+++ b/clang/lib/Driver/ToolChains/Darwin.h
@@ -290,8 +290,49 @@ class LLVM_LIBRARY_VISIBILITY MachO : public ToolChain {
/// }
};
+/// Apple specific MachO extensions
+class LLVM_LIBRARY_VISIBILITY AppleMachO : public MachO {
+public:
+ AppleMachO(const Driver &D, const llvm::Triple &Triple,
+ const llvm::opt::ArgList &Args);
+ ~AppleMachO() override;
+
+ /// }
+ /// @name Apple Specific ToolChain Implementation
+ /// {
+ void
+ AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const override;
+
+ void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const override;
+ void AddHIPIncludeArgs(const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const override;
+
+ void AddClangCXXStdlibIncludeArgs(
+ const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const override;
+ void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
+ llvm::opt::ArgStringList &CmdArgs) const override;
+
+ void printVerboseInfo(raw_ostream &OS) const override;
+ /// }
+
+ LazyDetector<CudaInstallationDetector> CudaInstallation;
+ LazyDetector<RocmInstallationDetector> RocmInstallation;
+
+protected:
+ llvm::SmallString<128>
+ GetEffectiveSysroot(const llvm::opt::ArgList &DriverArgs) const;
+
+private:
+ virtual void
+ AddGnuCPlusPlusIncludePaths(const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const;
+};
+
/// Darwin - The base Darwin tool chain.
-class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
+class LLVM_LIBRARY_VISIBILITY Darwin : public AppleMachO {
public:
/// Whether the information on the target has been initialized.
//
@@ -329,9 +370,6 @@ class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
/// The target variant triple that was specified (if any).
mutable std::optional<llvm::Triple> TargetVariantTriple;
- LazyDetector<CudaInstallationDetector> CudaInstallation;
- LazyDetector<RocmInstallationDetector> RocmInstallation;
-
private:
void AddDeploymentTarget(llvm::opt::DerivedArgList &Args) const;
@@ -343,7 +381,7 @@ class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args,
types::ID InputType) const override;
- /// @name Apple Specific Toolchain Implementation
+ /// @name Darwin Specific Toolchain Implementation
/// {
void addMinVersionArgs(const llvm::opt::ArgList &Args,
@@ -559,11 +597,6 @@ class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const override;
bool hasBlocksRuntime() const override;
- void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs,
- llvm::opt::ArgStringList &CC1Args) const override;
- void AddHIPIncludeArgs(const llvm::opt::ArgList &DriverArgs,
- llvm::opt::ArgStringList &CC1Args) const override;
-
bool UseObjCMixedDispatch() const override {
// This is only used with the non-fragile ABI and non-legacy dispatch.
@@ -594,8 +627,6 @@ class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
bool SupportsEmbeddedBitcode() const override;
SanitizerMask getSupportedSanitizers() const override;
-
- void printVerboseInfo(raw_ostream &OS) const override;
};
/// DarwinClang - The Darwin toolchain used by Clang.
@@ -613,16 +644,6 @@ class LLVM_LIBRARY_VISIBILITY DarwinClang : public Darwin {
llvm::opt::ArgStringList &CmdArgs,
bool ForceLinkBuiltinRT = false) const override;
- void AddClangCXXStdlibIncludeArgs(
- const llvm::opt::ArgList &DriverArgs,
- llvm::opt::ArgStringList &CC1Args) const override;
-
- void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
- llvm::opt::ArgStringList &CC1Args) const override;
-
- void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
- llvm::opt::ArgStringList &CmdArgs) const override;
-
void AddCCKextLibArgs(const llvm::opt::ArgList &Args,
llvm::opt::ArgStringList &CmdArgs) const override;
@@ -647,15 +668,16 @@ class LLVM_LIBRARY_VISIBILITY DarwinClang : public Darwin {
StringRef Sanitizer,
bool shared = true) const;
+ void
+ AddGnuCPlusPlusIncludePaths(const llvm::opt::ArgList &DriverArgs,
+ llvm::opt::ArgStringList &CC1Args) const override;
+
bool AddGnuCPlusPlusIncludePaths(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args,
llvm::SmallString<128> Base,
llvm::StringRef Version,
llvm::StringRef ArchDir,
llvm::StringRef BitDir) const;
-
- llvm::SmallString<128>
- GetEffectiveSysroot(const llvm::opt::ArgList &DriverArgs) const;
};
} // end namespace toolchains
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 29723b573e771a..8eba766f21a640 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -1507,6 +1507,11 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
// ELF targets define __ELF__
if (TI.getTriple().isOSBinFormatELF())
Builder.defineMacro("__ELF__");
+ else if (TI.getTriple().isAppleMachO())
+ // Apple MachO targets define __MACH__ even when not using DarwinTargetInfo.
+ // Hurd will also define this in some circumstances, but that's done in
+ // HurdTargetInfo. Windows targets don't define this.
+ Builder.defineMacro("__MACH__");
// Target OS macro definitions.
if (PPOpts.DefineTargetOSMacros) {
diff --git a/clang/lib/Lex/InitHeaderSearch.cpp b/clang/lib/Lex/InitHeaderSearch.cpp
index 67c9d92b849ea3..bb2a21356fa8fe 100644
--- a/clang/lib/Lex/InitHeaderSearch.cpp
+++ b/clang/lib/Lex/InitHeaderSearch.cpp
@@ -313,7 +313,7 @@ bool InitHeaderSearch::ShouldAddDefaultIncludePaths(
break;
case llvm::Triple::UnknownOS:
- if (triple.isWasm())
+ if (triple.isWasm() || triple.isAppleMachO())
return false;
break;
diff --git a/clang/test/Driver/Inputs/MacOSX15.1.sdk/embedded/usr/include/.keep b/clang/test/Driver/Inputs/MacOSX15.1.sdk/embedded/usr/include/.keep
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/clang/test/Driver/Inputs/MacOSX15.1.sdk/embedded/usr/local/include/.keep b/clang/test/Driver/Inputs/MacOSX15.1.sdk/embedded/usr/local/include/.keep
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/clang/test/Driver/Inputs/MacOSX15.1.sdk/usr/include/c++/v1/.keep b/clang/test/Driver/Inputs/MacOSX15.1.sdk/usr/include/c++/v1/.keep
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/clang/test/Driver/Inputs/MacOSX15.1.sdk/usr/local/include/.keep b/clang/test/Driver/Inputs/MacOSX15.1.sdk/usr/local/include/.keep
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/clang/test/Driver/darwin-embedded-search-paths.c b/clang/test/Driver/darwin-embedded-search-paths.c
new file mode 100644
index 00000000000000..d8b0139ababa3d
--- /dev/null
+++ b/clang/test/Driver/darwin-embedded-search-paths.c
@@ -0,0 +1,43 @@
+// UNSUPPORTED: system-windows
+// Windows is unsupported because we use the Unix path separator `/` in the test.
+
+// Unlike the Darwin driver, the MachO driver doesn't add any framework search paths,
+// only the normal header ones.
+// RUN: %clang -x c -target arm64-apple-none-macho -isysroot %S/Inputs/MacOSX15.1.sdk -### -c %s 2>&1 \
+// RUN: | FileCheck --check-prefixes=CC1,NO-CXX,ULI,CI,UI,NO-FW -DSDKROOT=%S/Inputs/MacOSX15.1.sdk %s
+
+// Unlike the Darwin driver, the MachO driver doesn't default to libc++
+// RUN: %clang -x c++ -target arm64-apple-none-macho -isysroot %S/Inputs/MacOSX15.1.sdk -### -c %s 2>&1 \
+// RUN: | FileCheck --check-prefixes=CC1,NO-CXX,ULI,CI,UI,NO-FW -DSDKROOT=%S/Inputs/MacOSX15.1.sdk %s
+
+// However, if the user requests libc++, the MachO driver should find the search path.
+// RUN: %clang -x c++ -stdlib=libc++ -target arm64-apple-none-macho -isysroot %S/Inputs/MacOSX15.1.sdk -### -c %s 2>&1 \
+// RUN: | FileCheck --check-prefixes=CC1,CXX,ULI,CI,UI,NO-FW -DSDKROOT=%S/Inputs/MacOSX15.1.sdk %s
+
+// Verify that embedded uses can swap in alternate usr/include and usr/local/include directories.
+// usr/local/include is specified in the driver as -internal-isystem, however, the driver generated
+// paths come before the paths in the driver arguments. In order to keep usr/local/include in the
+// same position, -isystem has to be used instead of -Xclang -internal-isystem. There isn't an
+// -externc-isystem, but it's ok to use -Xclang -internal-externc-isystem since the driver doesn't
+// use that if -nostdlibinc or -nostdinc is passed.
+// RUN: %clang -x c++ -stdlib=libc++ -target arm64-apple-none-macho -isysroot %S/Inputs/MacOSX15.1.sdk \
+// RUN: -nostdlibinc -isystem %S/Inputs/MacOSX15.1.sdk/embedded/usr/local/include \
+// RUN: -Xclang -internal-externc-isystem -Xclang %S/Inputs/MacOSX15.1.sdk/embedded/usr/include \
+// RUN: -### -c %s 2>&1 | FileCheck --check-prefixes=CC1,NO-CXX,EULI,CI,EUI,NO-FW -DSDKROOT=%S/Inputs/MacOSX15.1.sdk %s
+
+
+// The ordering of these flags doesn't matter, and so this test is a little
+// fragile. i.e. all of the -internal-isystem paths will be searched before the
+// -internal-externc-isystem ones, and their order on the command line doesn't
+// matter. The line order here is just the current order that the driver writes
+// the cc1 arguments.
+
+// CC1: "-cc1"
+// NO-CXX-NOT: "-internal-isystem" "[[SDKROOT]]/usr/include/c++/v1"
+// CXX-SAME: "-internal-isystem" "[[SDKROOT]]/usr/include/c++/v1"
+// ULI-SAME: "-internal-isystem" "[[SDKROOT]]/usr/local/include"
+// EULI-SAME: "-isystem" "[[SDKROOT]]/embedded/usr/local/include"
+// CI-SAME: "-internal-isystem" "{{.*}}/clang/{{[[:digit:].]*}}/include"
+// UI-SAME: "-internal-externc-isystem" "[[SDKROOT]]/usr/include"
+// EUI-SAME: "-internal-externc-isystem" "[[SDKROOT]]/embedded/usr/include"
+// NO-FW-NOT: "-internal-iframework"
diff --git a/clang/test/Preprocessor/macho-embedded-predefines.c b/clang/test/Preprocessor/macho-embedded-predefines.c
index 74f29199218c4b..a7e5777a89a980 100644
--- a/clang/test/Preprocessor/macho-embedded-predefines.c
+++ b/clang/test/Preprocessor/macho-embedded-predefines.c
@@ -3,18 +3,18 @@
// CHECK-7M: #define __APPLE_CC__
// CHECK-7M: #define __APPLE__
// CHECK-7M: #define __ARM_ARCH_7M__
-// CHECK-7M-NOT: #define __MACH__
+// CHECK-7M: #define __MACH__
// RUN: %clang_cc1 -E -dM -triple thumbv7em-apple-unknown-macho -target-cpu cortex-m4 %s | FileCheck %s -check-prefix CHECK-7EM
// CHECK-7EM: #define __APPLE_CC__
// CHECK-7EM: #define __APPLE__
// CHECK-7EM: #define __ARM_ARCH_7EM__
-// CHECK-7EM-NOT: #define __MACH__
+// CHECK-7EM: #define __MACH__
// RUN: %clang_cc1 -E -dM -triple thumbv6m-apple-unknown-macho -target-cpu cortex-m0 %s | FileCheck %s -check-prefix CHECK-6M
// CHECK-6M: #define __APPLE_CC__
// CHECK-6M: #define __APPLE__
// CHECK-6M: #define __ARM_ARCH_6M__
-// CHECK-6M-NOT: #define __MACH__
+// CHECK-6M: #define __MACH__
diff --git a/llvm/include/llvm/TargetParser/Triple.h b/llvm/include/llvm/TargetParser/Triple.h
index bd4051d00edbab..6688870870cdd1 100644
--- a/llvm/include/llvm/TargetParser/Triple.h
+++ b/llvm/include/llvm/TargetParser/Triple.h
@@ -564,6 +564,11 @@ class Triple {
bool isOSzOS() const { return getOS() == Triple::ZOS; }
+ /// Is this an Apple MachO triple.
+ bool isAppleMachO() const {
+ return (getVendor() == Triple::Apple) && isOSBinFormatMachO();
+ }
+
/// Is this a "Darwin" OS (macOS, iOS, tvOS, watchOS, XROS, or DriverKit).
bool isOSDarwin() const {
return isMacOSX() || isiOS() || isWatchOS() || isDriverKit() || isXROS();
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