llvm-project/clang/test/Driver/cl-sysroot.cpp

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clang-cl: Invent a /winsysroot concept On non-Windows platforms, --sysroot can be used to make the compiler use a single, hermetic directory for all header and library files. This is useful, but difficult to do on Windows. After D95472 it's possible to achieve this with two flags: out/gn/bin/clang-cl win.c -fuse-ld=lld \ /vctoolsdir path/to/VC/Tools/MSVC/14.26.28801 \ /winsdkdir path/to/win_sdk But that's still cumbersome: It requires two flags instead of one, and it requires writing down the (changing) VC/Tools/MSVC version. This adds a new `/winsysroot <dir>` flag that's effectively an alias to these two flags. With this, building against a hermetic Windows toolchain only needs: out/gn/bin/clang-cl win.c -fuse-ld=lld /winsysroot path `/winsysroot <dir>` is the same as adding /vctoolsdir <dir>/VC/Tools/MSVC/<vctoolsver> /winsdkdir <dir>/Windows Kits/<winsdkmajorversion> `<vctoolsver>` is taken from `/vctoolsversion` if passed, or else it's the name of the directory in `<dir>/VC/Tools/MSVC` that's the highest numeric tuple. `<winsdkmajorversion>` is the major version in /winsdkversion if passed, else it's the name of the directory in `<dir>/Windows Kits` that's the highest number. So `/winsysroot <path>` requires this subfolder structure: path/ VC/ Tools/ MSVC/ 14.26.28801 (or another number) include/ ... Windows Kits/ 10/ Include/ 10.0.19041.0/ (or another number) um/ ... Lib/ 10.0.19041.0/ (or another number) um/ x64/ ... ... Differential Revision: https://reviews.llvm.org/D95534
2021-01-28 00:01:59 +08:00
// RUN: rm -rf %t
// RUN: split-file %s %t
// RUN: %clang_cl /winsysroot %t -### -- %t/foo.cpp 2>&1 | FileCheck %s
// RUN: %clang_cl /vctoolsdir %t/VC/Tools/MSVC/27.1828.18284 \
// RUN: /winsdkdir "%t/Windows Kits/10" \
// RUN: -### -- %t/foo.cpp 2>&1 | FileCheck %s
// CHECK: "-internal-isystem" "[[ROOT:[^"]*]]{{/|\\\\}}VC{{/|\\\\}}Tools{{/|\\\\}}MSVC{{/|\\\\}}27.1828.18284{{/|\\\\}}include"
// CHECK: "-internal-isystem" "[[ROOT]]{{/|\\\\}}VC{{/|\\\\}}Tools{{/|\\\\}}MSVC{{/|\\\\}}27.1828.18284{{/|\\\\}}atlmfc{{/|\\\\}}include"
// CHECK: "-internal-isystem" "[[ROOT]]{{/|\\\\}}Windows Kits{{/|\\\\}}10{{/|\\\\}}Include{{/|\\\\}}10.0.19041.0{{/|\\\\}}ucrt"
// CHECK: "-internal-isystem" "[[ROOT]]{{/|\\\\}}Windows Kits{{/|\\\\}}10{{/|\\\\}}Include{{/|\\\\}}10.0.19041.0{{/|\\\\}}shared"
// CHECK: "-internal-isystem" "[[ROOT]]{{/|\\\\}}Windows Kits{{/|\\\\}}10{{/|\\\\}}Include{{/|\\\\}}10.0.19041.0{{/|\\\\}}um"
// CHECK: "-internal-isystem" "[[ROOT]]{{/|\\\\}}Windows Kits{{/|\\\\}}10{{/|\\\\}}Include{{/|\\\\}}10.0.19041.0{{/|\\\\}}winrt"
#--- VC/Tools/MSVC/27.1828.18284/include/string
namespace std {
class mystring {
public:
bool empty();
};
}
#--- Windows Kits/10/Include/10.0.19041.0/ucrt/assert.h
#define myassert(X)
#--- foo.cpp
#include <assert.h>
#include <string>
void f() {
std::mystring s;
myassert(s.empty());
}