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79 lines
3.7 KiB
Diff
79 lines
3.7 KiB
Diff
From e602ffe1785cef7f5502223e81345e6b9395fae1 Mon Sep 17 00:00:00 2001
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From: Mike Hommey <mh@glandium.org>
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Date: Fri, 11 Mar 2022 10:38:51 +0900
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Subject: [PATCH] Revert "[CMake][WinMsvc] Fix user passed compiler/linker
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flags"
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This reverts commit d6d3000a2f6d88ac73e5d4da4005ceadec788a9a
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because of bustage building 32-bits compiler-rt for Windows.
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See https://reviews.llvm.org/D116709#3374131
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---
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llvm/cmake/platforms/WinMsvc.cmake | 30 ++++++++++++++++++++++--------
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1 file changed, 22 insertions(+), 8 deletions(-)
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diff --git a/llvm/cmake/platforms/WinMsvc.cmake b/llvm/cmake/platforms/WinMsvc.cmake
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index d30701a31858..9a5078894182 100644
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--- a/llvm/cmake/platforms/WinMsvc.cmake
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+++ b/llvm/cmake/platforms/WinMsvc.cmake
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@@ -84,7 +84,6 @@
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# up a VFS overlay for the SDK headers and case-correcting symlinks for the
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# libraries when running on a case-sensitive filesystem.
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-include_guard(GLOBAL)
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# When configuring CMake with a toolchain file against a top-level CMakeLists.txt,
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# it will actually run CMake many times, once for each small test program used to
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@@ -252,8 +251,6 @@ list(APPEND _CTF_NATIVE_DEFAULT "-DCMAKE_ASM_COMPILER=${LLVM_NATIVE_TOOLCHAIN}/b
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list(APPEND _CTF_NATIVE_DEFAULT "-DCMAKE_C_COMPILER=${LLVM_NATIVE_TOOLCHAIN}/bin/clang")
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list(APPEND _CTF_NATIVE_DEFAULT "-DCMAKE_CXX_COMPILER=${LLVM_NATIVE_TOOLCHAIN}/bin/clang++")
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-# These flags are used during build time. So if CFLAGS/CXXFLAGS/LDFLAGS is set
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-# for the target, makes sure these are unset during build time.
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set(CROSS_TOOLCHAIN_FLAGS_NATIVE "${_CTF_NATIVE_DEFAULT}" CACHE STRING "")
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set(COMPILE_FLAGS
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@@ -280,8 +277,18 @@ if(case_sensitive_filesystem)
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endif()
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string(REPLACE ";" " " COMPILE_FLAGS "${COMPILE_FLAGS}")
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-string(APPEND CMAKE_C_FLAGS_INIT " ${COMPILE_FLAGS}")
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-string(APPEND CMAKE_CXX_FLAGS_INIT " ${COMPILE_FLAGS}")
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+
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+# We need to preserve any flags that were passed in by the user. However, we
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+# can't append to CMAKE_C_FLAGS and friends directly, because toolchain files
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+# will be re-invoked on each reconfigure and therefore need to be idempotent.
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+# The assignments to the _INITIAL cache variables don't use FORCE, so they'll
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+# only be populated on the initial configure, and their values won't change
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+# afterward.
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+set(_CMAKE_C_FLAGS_INITIAL "${CMAKE_C_FLAGS}" CACHE STRING "")
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+set(CMAKE_C_FLAGS "${_CMAKE_C_FLAGS_INITIAL} ${COMPILE_FLAGS}" CACHE STRING "" FORCE)
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+
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+set(_CMAKE_CXX_FLAGS_INITIAL "${CMAKE_CXX_FLAGS}" CACHE STRING "")
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+set(CMAKE_CXX_FLAGS "${_CMAKE_CXX_FLAGS_INITIAL} ${COMPILE_FLAGS}" CACHE STRING "" FORCE)
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set(LINK_FLAGS
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# Prevent CMake from attempting to invoke mt.exe. It only recognizes the slashed form and not the dashed form.
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@@ -305,9 +312,16 @@ if(case_sensitive_filesystem)
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endif()
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string(REPLACE ";" " " LINK_FLAGS "${LINK_FLAGS}")
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-string(APPEND CMAKE_EXE_LINKER_FLAGS_INIT " ${LINK_FLAGS}")
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-string(APPEND CMAKE_MODULE_LINKER_FLAGS_INIT " ${LINK_FLAGS}")
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-string(APPEND CMAKE_SHARED_LINKER_FLAGS_INIT " ${LINK_FLAGS}")
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+
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+# See explanation for compiler flags above for the _INITIAL variables.
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+set(_CMAKE_EXE_LINKER_FLAGS_INITIAL "${CMAKE_EXE_LINKER_FLAGS}" CACHE STRING "")
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+set(CMAKE_EXE_LINKER_FLAGS "${_CMAKE_EXE_LINKER_FLAGS_INITIAL} ${LINK_FLAGS}" CACHE STRING "" FORCE)
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+
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+set(_CMAKE_MODULE_LINKER_FLAGS_INITIAL "${CMAKE_MODULE_LINKER_FLAGS}" CACHE STRING "")
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+set(CMAKE_MODULE_LINKER_FLAGS "${_CMAKE_MODULE_LINKER_FLAGS_INITIAL} ${LINK_FLAGS}" CACHE STRING "" FORCE)
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+
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+set(_CMAKE_SHARED_LINKER_FLAGS_INITIAL "${CMAKE_SHARED_LINKER_FLAGS}" CACHE STRING "")
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+set(CMAKE_SHARED_LINKER_FLAGS "${_CMAKE_SHARED_LINKER_FLAGS_INITIAL} ${LINK_FLAGS}" CACHE STRING "" FORCE)
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# CMake populates these with a bunch of unnecessary libraries, which requires
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# extra case-correcting symlinks and what not. Instead, let projects explicitly
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--
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2.35.0.1.g829a698654
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