[cvs-nhc98] patch applied (hat): Permit all components to build with gcc.

[Malcolm Wallace]

Mon Jun  4 08:10:29 PDT 2001  malcolm
  * Permit all components to build with gcc.
  
  There are several changes to the build system in this update.
  
      * Use .z.o as the suffix for time profiling, to avoid conflicts
        in Windows between .T.o and .t.o.
  
      * Keep -t flag for time profiling, but permit -z as a synonym.
  
      * Now generate separate .c files for each `way':
           ordinary:  .hc
           heap prof: .p.c
           time prof: .z.c
           tracing:   .T.c
        and cause a build with 'gcc' to use these.  (Improves build speed
        enormously!)
  
      * A new 'default' top-level Makefile target = basic + tracer.

    M ./Makefile.inc -2 +26
    M ./src/compiler98/Makefile -13 +13