compile for Linux : adjust Makefile

[tissatussa]

hi,
i guess your default is AVX2 processors, but my laptop does not support that.
to compile on Linux (Xubuntu 20.04.2) i had to adjust the makefile by removing the NFLAGS, so the CXXFLAGS code line becomes like this :

CXXFLAGS = $(BFLAGS) $(WFLAGS)

[SamuraiDangyo]

Hello!
My bad. I added a comment in Makefile.
Yes,yYou need avx2 for current make.
Your modification works fine.
But I suggest this for older CPUs: NFLAGS = -DUSE_SSE -msse

[tissatussa]

thanks ! could your code be adjusted to auto-detect the hardware architecture and compile accordingly ? i think some other engines do this, but i'm not sure ..

[SamuraiDangyo]

Thanks for the feedback!
I added simple make oldcpu in Makefile
That should work 99%+ of the time if make fails.
For older CPUs g++ is better than clang++ IIRC

[tissatussa]

i also had to change that new MakeFile while default clang++ compiling gives an invalid executable on my Xubuntu 20.04.2, although the compilation was without errors .. using g++ gives me a valid binary .. i think your MakeFile is too simple .. some other engine programmers use some smart hardware detection or they test the made clang binary and when it's invalid they re-compile with g++ .. i guess this is how their "auto script" works .. example is the Halogen engine, see https://github.com/KierenP/Halogen .. thanks anyway for this new v4.1 version despite my bit of handcraft :-)