[gmx-users] avx2 with gcc 4.8.3

[Harry Mark Greenblatt]

BS"D

Dear Mark,

  Here is where it fails:

-- Try C++ compiler AVX2 flag = [-mavx2]
-- Performing Test CXX_FLAG_mavx2
-- Performing Test CXX_FLAG_mavx2 - Success
-- Performing Test CXX_SIMD_COMPILES_FLAG_mavx2
-- Performing Test CXX_SIMD_COMPILES_FLAG_mavx2 - Failed
-- Try C++ compiler AVX2 flag = [/arch:AVX]
-- Performing Test CXX_FLAG_arch_AVX
-- Performing Test CXX_FLAG_arch_AVX - Failed
-- Try C++ compiler AVX2 flag = [-hgnu]
-- Performing Test CXX_FLAG_hgnu
-- Performing Test CXX_FLAG_hgnu - Failed
-- Try C++ compiler AVX2 flag = []
-- Performing Test CXX_FLAG_
-- Performing Test CXX_FLAG_ - Success
-- Performing Test CXX_SIMD_COMPILES_FLAG_
-- Performing Test CXX_SIMD_COMPILES_FLAG_ - Failed
CMake Error at cmake/gmxTestSimd.cmake:244 (message):
  Cannot find AVX2 compiler flag.  Use a newer compiler, or choose AVX SIMD
  (slower).
Call Stack (most recent call first):
  CMakeLists.txt:716 (gmx_test_simd)



Well, which ones fail? Inspecting the compiler output (e.g. using cmake
--debug-trycompile and poking around it its output) is probably the only
way to find that problem.

Mark




-------------------------------------------------------------------------

Harry M. Greenblatt

Associate Staff Scientist

Dept of Structural Biology

Weizmann Institute of Science        Phone:  972-8-934-3625

234 Herzl St.                        Facsimile:   972-8-934-4159

Rehovot, 76100

Israel


Harry.Greenblatt at weizmann.ac.il<mailto:Harry.Greenblatt at weizmann.ac.il>