On Solaris, where both 32 and 64-bit executables are built, it is necessary to
use the -m64 flag to gcc/g++/gfortran to build 64-bit binaries. On some code I
see people as:
LDFLAGS=-m64
before building the code. My understanding is that LDFLAGS is passed to the
linker. Neither the GNU or Sun linkers have -m64 as an option (the Sun linker
supports -64, but not -m64). So I can't understand how this does not generate an
error message. Not only does if fail to generate an error, but some code will
simply not build without having -m64 in LDFLAGS.
Can anyone explain this to me please?
It is always safe to add -m64 to LDFLAGS code when building 64-bit versions of
it? In the Sage maths project, some code has it, and some does not. I don't know
if it sage to simply add it to all packages that build 64-bit code.
Yours, totally confused,
Dave
