This is the alpha release of the gdb port to MIPS-based machines. Only the (little-endian) DECstation3100 has been tested. Here I will try to list known problems: Calling a function in the debugger (as in 'print f(x)') normally works correctly. One known exception is if you pass a structure argument whose sizeof > 4. Currently, gdb will align it on an 8-byte boundary, while the compiler while depend on the alignment needed by the fields. (Unfortunately, the distributed varargs.h and stdarg.h are inconsistent with mips' compiler!) Fortran debugging could be made nicer, but a lot of that is a problem with the implementation-independent gdb. Code in include files is handled poorly (missing line numbers). Lots of testing is needed. E.g. is IN_SIGTRAMP (in infrun.c) correct?