The compilation failure message may be seen when using the gnu compiler, gfortran, on MacOS X when compiling drhook.c.
To compile OpenIFS correctly on a mac requires a small change to the configuration files to add a pre-processor symbol. In addition, please be aware that the FCM command will hang if more than one thread is being used (see below).
For the required compiler/build option, make a copy of the configuration. e.g. assuming the use of the GNU compilers:
cd cfg
cp gnu-opt.cfg mac-opt.cfg
Edit mac_gnu-opt.cfg
and find the line which defines the pre-processor symbols for the C compiler (gcc):
$OIFS_CCDEFS{?} = BLAS LITTLE LINUX INTEGER_IS_INT _ABI64
add 'DARWIN'
to this line:
$OIFS_CCDEFS{?} = BLAS LITTLE LINUX INTEGER_IS_INT _ABI64 DARWIN
and save the file.
To compile OpenIFS with this new configuration file set:
export OIFS_COMP=mac
export OIFS_BUILD=opt
which tells the build system to use the file: mac-opt.cfg. The same change can be made to the un-optimized compilation configuration: gnu-noopt.cfg.