================
@@ -0,0 +1,55 @@
+// UNSUPPORTED: system-windows
+// Windows is unsupported because we use the Unix path separator `/` in the
test.
+
+// Add default directories before running clang to check default
+// search paths.
+// RUN: rm -rf %t && mkdir -p %t
+// RUN: cp -R %S/Inputs/MacOSX15.1.sdk %t/
+// RUN: mkdir -p %t/MacOSX15.1.sdk/usr/include
+// RUN: mkdir -p %t/MacOSX15.1.sdk/usr/include/c++/v1
+// RUN: mkdir -p %t/MacOSX15.1.sdk/usr/local/include
+// RUN: mkdir -p %t/MacOSX15.1.sdk/embedded/usr/include
+// RUN: mkdir -p %t/MacOSX15.1.sdk/embedded/usr/local/include
+
+// Unlike the Darwin driver, the MachO driver doesn't add any framework search
paths,
+// only the normal header ones.
+// RUN: %clang -xc %s -target arm64-apple-none-macho -isysroot
%t/MacOSX15.1.sdk -E -v 2>&1 | FileCheck --check-prefix=CHECK-C %s
+//
+// CHECK-C: -isysroot [[SDKROOT:[^ ]*/MacOSX15.1.sdk]]
+// CHECK-C: #include <...> search starts here:
+// CHECK-C-NEXT: [[SDKROOT]]/usr/local/include
+// CHECK-C-NEXT: /clang/{{.*}}/include
+// CHECK-C-NEXT: [[SDKROOT]]/usr/include
+
+// Unlike the Darwin driver, the MachO driver doesn't default to libc++
+// RUN: %clang -xc++ %s -target arm64-apple-none-macho -isysroot
%t/MacOSX15.1.sdk -E -v 2>&1 | FileCheck --check-prefix=CHECK-CXX %s
+//
+// CHECK-CXX: -isysroot [[SDKROOT:[^ ]*/MacOSX15.1.sdk]]
+// CHECK-CXX: #include <...> search starts here:
+// CHECK-CXX-NEXT: [[SDKROOT]]/usr/local/include
+// CHECK-CXX-NEXT: /clang/{{.*}}/include
+// CHECK-CXX-NEXT: [[SDKROOT]]/usr/include
+
+// However, if the user requests libc++, the MachO driver should find the
search path.
+// RUN: %clang -xc++ -stdlib=libc++ %s -target arm64-apple-none-macho
-isysroot %t/MacOSX15.1.sdk -E -v 2>&1 | FileCheck --check-prefix=CHECK-LIBCXX
%s
+//
+// CHECK-LIBCXX: -isysroot [[SDKROOT:[^ ]*/MacOSX15.1.sdk]]
+// CHECK-LIBCXX: #include <...> search starts here:
+// CHECK-LIBCXX-NEXT: [[SDKROOT]]/usr/include/c++/v1
+// CHECK-LIBCXX-NEXT: [[SDKROOT]]/usr/local/include
+// CHECK-LIBCXX-NEXT: /clang/{{.*}}/include
+// CHECK-LIBCXX-NEXT: [[SDKROOT]]/usr/include
+
+// 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 -xc++ -stdlib=libc++ %s -target arm64-apple-none-macho
-isysroot %t/MacOSX15.1.sdk -nostdlibinc -isystem
%t/MacOSX15.1.sdk/embedded/usr/local/include -Xclang -internal-externc-isystem
-Xclang %t/MacOSX15.1.sdk/embedded/usr/include -E -v 2>&1 | FileCheck
--check-prefix=CHECK-EMBEDDED %s
+//
+// CHECK-EMBEDDED: -isysroot [[SDKROOT:[^ ]*/MacOSX15.1.sdk]]
----------------
ian-twilightcoder wrote:
Also copied but yeah let me change this in both places too :smiling
https://github.com/llvm/llvm-project/pull/120507
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