[Gsmmap] Problems compiling osmocom-bb -- with solutions :)

[Dave Schmidt]

Hi list,

Looks like the "suggested" at http://srlabs.de/gsm-map-tutorial/ ARM compiler did not fully work for me: 

~/cell_logger/osmocom-bb/src$ make
cd shared/libosmocore/build-target && ../configure \
(...output skipped...)
configure: error: in `(..)/cell_logger/osmocom-bb/src/shared/libosmocore/build-target':
configure: error: C compiler cannot create executables
See `config.log' for more details
make: *** [shared/libosmocore/build-target/Makefile] Error 77

Investigation shows that the provided arm-elf-gcc invokes a wrong assembler: it looks for "as", not "arm-elf-as".

Probably the right way would be to correctly build arm-elf tools, but I wanted to use exactly same tools as in the instructions, so went a really quick and dirty way:

1) built the host binaries without arm-elf tools in the PATH:

export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
make nofirmware

2) built the target binaries with "as" substituted by "arm-elf-as":

cd ~/cell_logger/gnuqrm-3.4.2/bin
ln -s arm-elf-as as

cd ~/cell_logger/osmocom-bb/src