PS: SOLVED but can't delete this post.

Hi

I try to compile a makefile based project and get:

/usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libSDL.a when searching for -lSDL
/usr/bin/ld: cannot find -lSDL
/usr/bin/ld: cannot find -lSOIL32
/usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libGL.so when searching for -lGL
/usr/bin/ld: cannot find -lGL
/usr/bin/ld: cannot find -lluajit-5.1

I guess I need to tell to compile for x64? Probably I need to change this line below?

# release options
RELEASE_CXXFLAGS=-O3 -ffast-math -march=i686 -msse
RELEASE_LNFLAGS=

Thanks

For the benefit of those who come after, those who search for their answer in Google and end up here:

What was your solution?

I only needed to change those two settings. Sorry I hardly ever used makefiles before:

# release options
RELEASE_CXXFLAGS=-O3 -ffast-math -march=x86-64 -msse

ifneq ($(BUILD_64),yes)
#CXXFLAGS+=-m32
#LNFLAGS+=-m32 -L/usr/lib32
CXXFLAGS+=-m64
LNFLAGS+=-m64 -L/usr/lib/x86_64-linux-gnu/
endif