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[Support] Allow configuring the preferred type of slashes on Windows

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Default to preferring forward slashes when built for MinGW, as
many usecases, when e.g. Clang is used as a drop-in replacement
for GCC, requires the compiler to output paths with forward slashes.

Not all tests pass yet, if configuring to prefer forward slashes though.

Differential Revision: https://reviews.llvm.org/D112787
This commit is contained in:
Martin Storsjö 2021-10-13 12:18:32 +00:00
parent f4d83c56c9
commit df0ba47c36
3 changed files with 15 additions and 1 deletions
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8
llvm/CMakeLists.txt
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@ -359,6 +359,14 @@ endif()
option(LLVM_ENABLE_CRASH_DUMPS "Turn on memory dumps on crashes. Currently only implemented on Windows." OFF)
set(WINDOWS_PREFER_FORWARD_SLASH_DEFAULT OFF)
if (MINGW)
# Cygwin doesn't identify itself as Windows, and thus gets path::Style::posix
# as native path style, regardless of what this is set to.
set(WINDOWS_PREFER_FORWARD_SLASH_DEFAULT ON)
endif()
option(LLVM_WINDOWS_PREFER_FORWARD_SLASH "Prefer path names with forward slashes on Windows." ${WINDOWS_PREFER_FORWARD_SLASH_DEFAULT})
option(LLVM_ENABLE_FFI "Use libffi to call external functions from the interpreter" OFF)
set(FFI_LIBRARY_DIR "" CACHE PATH "Additional directory, where CMake should search for libffi.so")
set(FFI_INCLUDE_DIR "" CACHE PATH "Additional directory, where CMake should search for ffi.h or ffi/ffi.h")

4
llvm/include/llvm/Config/config.h.cmake
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@ -19,6 +19,10 @@
/* Define to 1 to enable crash memory dumps, and to 0 otherwise. */
#cmakedefine01 LLVM_ENABLE_CRASH_DUMPS
/* Define to 1 to prefer forward slashes on Windows, and to 0 prefer
backslashes. */
#cmakedefine01 LLVM_WINDOWS_PREFER_FORWARD_SLASH
/* Define to 1 if you have the `backtrace' function. */
#cmakedefine HAVE_BACKTRACE ${HAVE_BACKTRACE}

4
llvm/lib/Support/Path.cpp
View File

@ -12,6 +12,7 @@
#include "llvm/Support/Path.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Config/config.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Errc.h"
@ -41,7 +42,8 @@ namespace {
return style;
if (is_style_posix(style))
return Style::posix;
return Style::windows;
return LLVM_WINDOWS_PREFER_FORWARD_SLASH ? Style::windows_slash
: Style::windows_backslash;
}
inline const char *separators(Style style) {