With Mac OS X 10.4.4, I'm having problems compiling Open-MPI 1.0.1 with Myrinet-MX support. It works fine with Myrinet-GM drivers. 

I configured with the following:

./configure --prefix=/hpc/mpis/ompi101 --with-mx=/opt/mx

I'm getting the following error when I run make:

/../.. -I../../../.. -I../../../../include -I../../../../opal -I../../../../orte -I../../../../ompi -D_REENTRANT -O3 -DNDEBUG -fno-strict-aliasing -MT btl_mx_component.lo -MD -MP -MF .deps/btl_mx_component.Tpo -c btl_mx_component.c  -fno-common -DPIC -o .libs/btl_mx_component.o
btl_mx_component.c: In function 'mca_btl_mx_component_open':
btl_mx_component.c:108: warning: pointer targets in passing argument 7 of 'mca_base_param_reg_int' differ in signedness
btl_mx_component.c:111: error: 'mca_btl_mx_component_t' has no member named 'mx_timeout'
btl_mx_component.c:117: warning: pointer targets in passing argument 7 of 'mca_base_param_reg_int' differ in signedness
make[4]: *** [btl_mx_component.lo] Error 1
make[3]: *** [all-recursive] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1

Warner Yuen
Research Computing Consultant
Apple Computer
email: wyuen@apple.com
Tel: 408.718.2859
Fax: 408.715.0133