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115 lines
2.8 KiB
CMake
115 lines
2.8 KiB
CMake
# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
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# SPDX-License-Identifier: Apache-2.0.
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include(CheckCSourceRuns)
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option(USE_CPU_EXTENSIONS "Whenever possible, use functions optimized for CPUs with specific extensions (ex: SSE, AVX)." ON)
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# In the current (11/2/21) state of mingw64, the packaged gcc is not capable of emitting properly aligned avx2 instructions under certain circumstances.
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# This leads to crashes for windows builds using mingw64 when invoking the avx2-enabled versions of certain functions. Until we can find a better
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# work-around, disable avx2 (and all other extensions) in mingw builds.
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#
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54412
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#
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if (MINGW)
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message(STATUS "MINGW detected! Disabling avx2 and other CPU extensions")
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set(USE_CPU_EXTENSIONS OFF)
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endif()
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if(NOT CMAKE_CROSSCOMPILING)
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check_c_source_runs("
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#include <stdbool.h>
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bool foo(int a, int b, int *c) {
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return __builtin_mul_overflow(a, b, c);
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}
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int main() {
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int out;
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if (foo(1, 2, &out)) {
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return 0;
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}
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return 0;
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}" AWS_HAVE_GCC_OVERFLOW_MATH_EXTENSIONS)
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if (USE_CPU_EXTENSIONS)
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check_c_source_runs("
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int main() {
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int foo = 42;
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_mulx_u32(1, 2, &foo);
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return foo != 2;
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}" AWS_HAVE_MSVC_MULX)
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endif()
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endif()
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check_c_source_compiles("
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#include <Windows.h>
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#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
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int main() {
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return 0;
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}
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#else
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it's not windows desktop
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#endif
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" AWS_HAVE_WINAPI_DESKTOP)
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check_c_source_compiles("
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int main() {
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#if !(defined(__x86_64__) || defined(__i386__) || defined(_M_X64) || defined(_M_IX86))
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# error \"not intel\"
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#endif
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return 0;
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}
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" AWS_ARCH_INTEL)
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check_c_source_compiles("
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int main() {
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#if !(defined(__aarch64__) || defined(_M_ARM64))
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# error \"not arm64\"
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#endif
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return 0;
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}
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" AWS_ARCH_ARM64)
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check_c_source_compiles("
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int main() {
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#if !(defined(__arm__) || defined(_M_ARM))
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# error \"not arm\"
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#endif
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return 0;
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}
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" AWS_ARCH_ARM32)
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check_c_source_compiles("
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int main() {
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int foo = 42, bar = 24;
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__asm__ __volatile__(\"\":\"=r\"(foo):\"r\"(bar):\"memory\");
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}" AWS_HAVE_GCC_INLINE_ASM)
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check_c_source_compiles("
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#include <sys/auxv.h>
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int main() {
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#ifdef __linux__
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getauxval(AT_HWCAP);
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getauxval(AT_HWCAP2);
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#endif
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return 0;
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}" AWS_HAVE_AUXV)
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string(REGEX MATCH "^(aarch64|arm)" ARM_CPU "${CMAKE_SYSTEM_PROCESSOR}")
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if(NOT LEGACY_COMPILER_SUPPORT OR ARM_CPU)
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check_c_source_compiles("
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#include <execinfo.h>
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int main() {
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backtrace(NULL, 0);
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return 0;
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}" AWS_HAVE_EXECINFO)
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endif()
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check_c_source_compiles("
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#include <linux/if_link.h>
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int main() {
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return 1;
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}" AWS_HAVE_LINUX_IF_LINK_H)
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