If you want to use the
libmass.a scalar library for some
functions and the normal math library
libm.a for other functions,
follow this procedure to compile and link your program:
- Create an export list (this can be a flat text file) containing
the names of the wanted functions. For example,
to select only the fast tangent function from libmass.a for
use with the C program sample.c,
create a file called fasttan.exp with the following line:
tan
- Create a shared object from the export list with the ld command,
linking with the libmass.a library. For example:
ld -bexport:fasttan.exp -o fasttan.o -bnoentry -lmass -bmodtype:SRE
- Archive the shared object into a library with the ar command.
For example:
ar -q libfasttan.a fasttan.o
- Create the final executable using xlc, specifying the object
file containing the MASS functions before the standard math
library, libm.a. This links only the functions
specified in the object file (in this example, the tan function)
and the remainder of the math functions from the standard math library.
For example:
xlc sample.c -o sample -Ldir_containing_libfasttan -lfasttan -lm
Notes: - The MASS sincos function is automatically linked
if you export MASS cosisin;
- The MASS cos function is automatically linked
if you export MASS sin;
- The MASS atan2 is automatically linked if you
export MASS atan.
Related external information - ar and ld in the AIX® Commands
Reference, Volumes 1 - 6