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Fix detection of AVX512 capable compilers in getarch 

21eda8b5 introduced a check in getarch.c to test if the compiler is capable of
AVX512. This check currently fails, since the used __AVX2__ macro is only
defined if getarch itself was compiled with AVX2/AVX512 support. Make sure this
is the case by building getarch with -march=native on x86_64. It is only
supposed to run on the build host anyway.
This commit is contained in:
Michael Lass 2019-05-03 21:07:14 +02:00
parent 27649b9543
commit 7a9a4dbc4f
2 changed files with 14 additions and 0 deletions
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9
Makefile.system
View File

@ -9,6 +9,11 @@ ifndef TOPDIR
TOPDIR = .
endif
# If ARCH is not set, we use the host system's architecture.
ifndef ARCH
ARCH := $(shell uname -m)
endif
# Catch conflicting usage of ARCH in some BSD environments
ifeq ($(ARCH), amd64)
override ARCH=x86_64
@ -137,6 +142,10 @@ endif
endif
# On x86_64 build getarch with march=native. This is required to detect AVX512 support in getarch.
ifeq ($(ARCH), x86_64)
GETARCH_FLAGS += -march=native
endif
ifdef INTERFACE64

5
cmake/system.cmake
View File

@ -65,6 +65,11 @@ if (DEFINED TARGET)
set(GETARCH_FLAGS "-DFORCE_${TARGET}")
endif ()
# On x86_64 build getarch with march=native. This is required to detect AVX512 support in getarch.
if (X86_64)
set(GETARCH_FLAGS "${GETARCH_FLAGS} -march=native")
endif ()
if (INTERFACE64)
message(STATUS "Using 64-bit integers.")
set(GETARCH_FLAGS "${GETARCH_FLAGS} -DUSE64BITINT")