cbaa3597aa
This reverts commit d763c6e5e2d0a6b34097aa7dabca31e9aff9b0b6. Adds the patch by @hans from https://github.com/llvm/llvm-project/issues/62719 This patch fixes the Windows build. d763c6e5e2d0a6b34097aa7dabca31e9aff9b0b6 reverted the reviews D144509 [CMake] Bumps minimum version to 3.20.0. This partly undoes D137724. This change has been discussed on discourse https://discourse.llvm.org/t/rfc-upgrading-llvms-minimum-required-cmake-version/66193 Note this does not remove work-arounds for older CMake versions, that will be done in followup patches. D150532 [OpenMP] Compile assembly files as ASM, not C Since CMake 3.20, CMake explicitly passes "-x c" (or equivalent) when compiling a file which has been set as having the language C. This behaviour change only takes place if "cmake_minimum_required" is set to 3.20 or newer, or if the policy CMP0119 is set to new. Attempting to compile assembly files with "-x c" fails, however this is workarounded in many cases, as OpenMP overrides this with "-x assembler-with-cpp", however this is only added for non-Windows targets. Thus, after increasing cmake_minimum_required to 3.20, this breaks compiling the GNU assembly for Windows targets; the GNU assembly is used for ARM and AArch64 Windows targets when building with Clang. This patch unbreaks that. D150688 [cmake] Set CMP0091 to fix Windows builds after the cmake_minimum_required bump The build uses other mechanism to select the runtime. Fixes #62719 Reviewed By: #libc, Mordante Differential Revision: https://reviews.llvm.org/D151344
33 lines
1008 B
CMake
33 lines
1008 B
CMake
project(exec C)
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cmake_minimum_required(VERSION 3.20.0)
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include(CheckCCompilerFlag)
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check_c_compiler_flag("-std=c99" C99_SUPPORTED)
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if (C99_SUPPORTED)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99")
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endif()
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include(CheckFunctionExists)
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include(CheckSymbolExists)
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add_definitions(-D_GNU_SOURCE)
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list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
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check_function_exists(execve HAVE_EXECVE)
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check_function_exists(execv HAVE_EXECV)
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check_function_exists(execvpe HAVE_EXECVPE)
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check_function_exists(execvp HAVE_EXECVP)
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check_function_exists(execvP HAVE_EXECVP2)
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check_function_exists(exect HAVE_EXECT)
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check_function_exists(execl HAVE_EXECL)
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check_function_exists(execlp HAVE_EXECLP)
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check_function_exists(execle HAVE_EXECLE)
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check_function_exists(posix_spawn HAVE_POSIX_SPAWN)
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check_function_exists(posix_spawnp HAVE_POSIX_SPAWNP)
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configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.h.in ${CMAKE_CURRENT_BINARY_DIR}/config.h)
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include_directories(${CMAKE_CURRENT_BINARY_DIR})
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add_executable(exec main.c)
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