All, I have a Powerbook G4 running Leopard that I want to install and run the gromacs application under Macports. I am trying to set up gromacs on a G4 powerbook 1.25 GB RAM, 60 MB Drive, I have upgraded to OS X 10.5. I am using the Darwinports installer. As instructed, I have installed XCode tools, X11 SDK. I got xmgrace to work, however, gwyddion, rasmol and gromacs error on compilation. For gromacs, I get the following error: ---> Building gromacs with target all

Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports .org_release_ports_science_gromacs/work/gromacs-3.3.1" && make all " returned error 2 Command output: nb_kernel010_ppc_altivec.c:145: error: 'Vvdw6' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:146: error: 'Vvdw12' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:150: error: 'fs' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:159: error: 'tmp1' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:159: error: 'tmp2' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:159: error: 'tmp3' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:159: error: 'tmp4' undeclared (first use in this function) nb_kernel010_ppc_altivec.c: In function 'nb_kernel010nf_ppc_altivec': nb_kernel010_ppc_altivec.c:293: error: 'vector' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:293: error: syntax error before 'float' nb_kernel010_ppc_altivec.c:312: error: 'nul' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:331: error: 'shvec' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:334: error: 'ix' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:335: error: 'Vvdwtot' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:339: error: 'iy' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:339: error: 'iz' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:353: error: 'dx' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:353: error: 'dy' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:353: error: 'dz' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:357: error: 'rsq' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:360: error: 'rinvsq' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:361: error: 'rinvsix' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:367: error: 'c6' undeclared (first use in this function) nb_kernel010_ppc_altivec.c:367: error: 'c12' undeclared (first use in this function) make[5]: *** [nb_kernel010_ppc_altivec.lo] Error 1 make[4]: *** [all-recursive] Error 1 make[3]: *** [all-recursive] Error 1 make[2]: *** [all-recursive] Error 1 make[1]: *** [all] Error 2 make: *** [all-recursive] Error 1

The response I got back from the Gromacs help site was: This may mean that you have to change some compiler flags, since Leopard comes with a new version of gcc. Previously one had to use -faltive. Maybe you can read the gcc manual (man gcc) and the rerun make CFLAGS="-faltivec" or similar new flags. But I cannot find the right options right now. Has anyone had a similar experience? How did you address this. I am a novice to Macports. Is this the case that I need to compile with altivec? If so, how do I change the CFLAGS ? -- Carl E. Bonner, Jr., Norfolk State University, 700 Park Avenue, Norfolk, VA 23504 (757) 823-2097 (voice) (757) 823-0033 (fax), http://vigyan.nsu.edu/~cmr/cebonner.htm