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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-12-01 15:05:26 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-12-01 15:05:26 +0000 |
commit | 955a9ba74c6f0e5ad3787d149c56bc90c22ee045 (patch) | |
tree | d2ac7086a3620c021e8da794e69e1cf5bbd00795 /c/src/exec/score/cpu/Makefile.in | |
parent | Patch rtems-rc-19991123-rc-2.diff from Ralf Corsepius (diff) | |
download | rtems-955a9ba74c6f0e5ad3787d149c56bc90c22ee045.tar.bz2 |
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.
Diffstat (limited to 'c/src/exec/score/cpu/Makefile.in')
0 files changed, 0 insertions, 0 deletions