A quick stab at changing... specific__exp_r16 = exp (parm)
to specific__exp_r16 = expl (parm) ...in gcc/libgfortran/generated/_exp_r16.F90 produced the followimg compilation error on Darwin PPC... ../../../gcc-4.2-20070526/libgfortran/generated/_exp_r16.F90:47.23: specific__exp_r16 = expl (parm) 1 Error: Function reference to 'expl' at (1) is to a non-PURE procedure within a PURE procedure make[3]: *** [_exp_r16.lo] Error 1 make[2]: *** [all] Error 2 make[1]: *** [all-target-libgfortran] Error 2 make: *** [all] Error 2 Which led me to take a look at gcc/libgfortran/c99_protos.h. There I noticed we have no mention of expl() despite it being listed as a valid C99 function... http://en.wikibooks.org/wiki/C_Programming/Further_math Again, is it possible that Darwin PPC simply is exposing the fact that we are missing valid C99 functions that should be used in the generated *.F90 routines for r10 and r16? Jack