Patch rtems-rc-19991123-rc-2.diff from Ralf Corsepius

    <corsepiu@faw.uni-ulm.de> which implements automake support for some
    score/cpu/<RTEMS_CPU> subdirectories and fixes a few minor configuration
    bugs.


    To apply:

        rm -rf c/src/exec/score/cpu/a29k/wrap
        rm -rf c/src/exec/score/cpu/hppa1.1/wrap
        rm -rf c/src/exec/score/cpu/i386/wrap
        rm -rf c/src/exec/score/cpu/mips64orion/wrap
        rm -rf c/src/exec/score/cpu/no_cpu/wrap
        patch -p1 < rtems-rc-19991123-rc-2.diff.gz

    Notes:

    * I don't see a possiblity to convert the powerpc subdirectory in its
      current layout to automake the time being.

    * Besides the fact that this subdirectory is not in single-tree building
      layout, the actual showstopper is the ifeq $(RTEMS_CPU_MODEL),mpc750)
      gmake-conditional in powerpc/Makefile.in, which automake (correctly)
      refuses to handle.

    * The problem is *not* specific to the powerpc. Other CPUs basically
      have similar problems (SH:sh7032 vs sh7045, SPARC: erc32.h in
      score/cpu/sparc), but have been lucky to get around real issues (cf.
      configuration files below score/cpu/sh/).

    * From a configuration focused POV this problem boils down to a
      file/subdirectory selection problem:
         ppc: 1 or others
         sh: 1 out of 2
         sparc: 1 out of 1
      Automake's means to implement such behavior is using conditionals to be
      evaluated at configuration-time. The old configuration scheme however
      used make-time conditionals. The SH port was lucky to get around this
      issue because it applies a selection from a limited set of possible
      selections, the powerpc however applies a selection from an unlimited
      set, based on data not being available at configuration time.

    * Currently I only see two general solutions:
       1) make RTEMS_CPU_MODEL available at configuration time, ie. replace
          make-time configuration by configuration-time configuration
       2) Perform the selection at build-time, i.e. always install all files,
          but use #ifdef #else #endif in source files. This is what the m68k has
          exploited at other locations inside of the source-tree.

    => This directory is the last one remaining not using automake below the
       whole exec/ hierarchy.

0 files changed, 0 insertions, 0 deletions