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Hi I am trying to compile using mingw the open source backgammon game gnu backgammon.
I have followed all the instructions on the website but on build, I get the error:
in file included from inputs.c
Error "SSE instruction set not enabled"
and then "in function baseInputs"
8 errors of unknown type name '__m128 not enabled'
anyone know what this means, and how i can get around it, or deal with it because I obviously didnt write this code, im just trying to learn from it.
Thanks
Alex
I think Google knows the answer, but as an R&D bod I'm sure you've already looked at it, tried the solution it presents and then posted here because the purported answer was lacking?
Do you have a processor with SSE instructions in your local machine?
i386 and x86-64 Options - Using the GNU Compiler Collection (GCC)
The "out of the box" default for gcc is likely to be pretty conservative, to allow most of the code to run on the widest range of platforms.
Yeah Ive googled it. Google tells me that SSE is a technique for processing 4 32bit integers or 2 64 bit integers in one cycle. As far as I can tell its all about efficiency. As GNU BG is written under GNU, and it was their compilation instructions I didnt think there would have been an issue.
I didnt expect it not to compie considering the website suggests the method I used. I wanted to see how the authors had written such a clever piece of software especially as I play against GNUBG alot, and on its hardest mode can never beat it, so I wanted to see what changes it makes for different levels of hardness.
Salem, if you specifically mean what processor do I have, I have:
Intel Core i3 2120 3.3GHz Socket 1155 3MB L3 Cache
so are you saying when i run the build i should add an argument to also include compilation for SSE? That makes sense i suppose...
Ive not had to change these properties of GCC before, could you give me a hint? i have a .bat file with some make commands in, and according to the link you posted,
-mfpmath=sse would turn on sse units, however it is set as default for "x86-64" compiler.
So do I add that to the .bat file? and how do I know if my processor has SSE instructions?
http://ark.intel.com/products/53426/...he-3_30-GHz%29
It seems you have a 64-bit processor with SSE enabled.
> -mfpmath=sse would turn on sse units, however it is set as default for "x86-64" compiler.
> So do I add that to the .bat file?
Yes, something like that.
Do you see something like
CFLAGS=
anywhere?
This is the expected symbol for setting compile flags in makefiles.
If it's a really simple batch file with just a single 'gcc' line to compile and link everything, then try putting that flag somewhere on the gcc command line.
Hi Salem, this is the .bat file:
I tried putting it at the end of the set line, it seemed to make no difference there and at the end of the mingw32-make line where pmath-sse was not recognised. Notice the mf is missing - that is not a typo...Code:@echo off
call misc\setupvars
rem set COMPOPT=-Werror -Wall -g -O2 -mms-bitfields -fno-strict-aliasing
rem set COMPOPT=-Werror -Wall -g -O2 -mms-bitfields -ansi -pedantic -Wno-overlength-strings
set COMPOPT=-Wall -g -O2 -mms-bitfields -fno-strict-aliasing
cd %GNUSRC%
mingw32-make -fmakefile.w32
if ERRORLEVEL 1 goto builderr
if NOT EXIST %GNUBIN%\gnubg.exe goto builderr
cd %ORGDIR%
"run gnubg.bat"
:builderr
echo ** Build failed **
pause
Perhaps I would try one of
set COMPOPT=-Wall -g -O2 -mms-bitfields -fno-strict-aliasing -march=core2 -mfpmath=sse
set COMPOPT=-Wall -g -O2 -mms-bitfields -fno-strict-aliasing -msse -mfpmath=sse
set COMPOPT=-Wall -g -O2 -mms-bitfields -fno-strict-aliasing -march=native -mfpmath=sse
awesome Salem. The first one worked. Thanks alot for your help.