So I'm trying to build a cross-compiler toolchain off of the latest GCC (gcc-5.1.0). GCC requires GMP and so I downloaded GNU MP 6.0 (gmp-6.0.0).
Instructions for building GMP suggest (for my purpose) to pass the parameter --enable-mpbsd which is documented as follows:
The meaning of the new configure options:
--enable-cxxThis parameter enables C++ support
--enable-mpbsdThis builds the Berkeley MP compatibility library
However, when I fun configure, it warns me:
configure: WARNING: unrecognized options: --enable-mpbsd
Which suggests that the option was introduced in 5.x and deprecated again in 6.x or replaced by something else ...?!
The exact command line I use is (just for completeness):
./configure --prefix=$PREFIX --enable-shared --enable-static --enable-mpbsd --enable-fft --enable-cxx --host=x86_64-pc-freebsd6
PS: for now I intend to disregard this warning and proceed anyway. I'll report back whether this still turns out as a functional toolchain.
--enable-mpbsdThis builds the Berkeley MP compatibility library
This was potentially useful 20 years ago, but it hasn't been for a long time, which is why it was removed from GMP. Linux From Scratch is wrong to recommend the use of that option, it was never required (though it didn't hurt). Please contact them so they can update their instructions.
By the way, you do not need --enable-shared --enable-static --enable-fft, they are the default.