On Sat, 21 Jun 2025 11:03:19 +0200
Richard Biener <[email protected]> wrote:
> > A comparison of the mentions of "fixinclude" in config.{status,log}
> > of two directories, bootstrap and non-bootstrap, shows no
> > difference.
> >
> > What should I be looking for?
>
> For why fixinclude isn?t built - the config.log therein might show
> something.
Thanks, Richard. As I said, both bootstrap and nonboostrap builds
leave identical traces of fixinclude in config.log:
$ grep fixi build/config.log | nl
1 build_configdirs=' libiberty libcpp fixincludes'
2 configdirs=' libiberty zlib libbacktrace libcpp libcody
libdecnumber fixincludes gcc libcc1 c++tools'
At Iain's suggestion, I tried an out-of-body experience, and that
worked. So, now we know something we didn't before. Let me explain.
I normally create a build directory off the root. According to
gccinstall.info, that is a supported arrangement.
"... building where OBJDIR is a subdirectory of SRCDIR should
work as well; building where OBJDIR == SRCDIR is unsupported."
I take that to mean that, wherever one builds, one must be free to run
"rm -rf" on the build tree.
So I normally have:
$ pwd && ls -d $(git rev-parse --show-toplevel) build
/home/jklowden/projects/3rd/gcc/parser
/home/jklowden/projects/3rd/gcc/parser build
In that topology, for a bootstrap build only, build/fixinclude is
empty.
Today I created a build directory in /tmp, and the bootstrap build
succeeded:
$ head config.log | grep /configure
$ /home/jklowden/projects/3rd/gcc/cobol-stage/configure
--prefix=/usr/local/gcc-cobol --disable-multilib --enable-checking
--enable-languages=c,cobol
$ ls fixincludes/ config.cache fixfixes.o
fixlib.o Makefile server.o config.h fixincl
fixopts.o mkheaders stamp-hconfig.log fixincl.o
fixtests.o mkheaders.almost config.status fixinc.sh full-stamp
procopen.o
To recap:
1. For --disable-bootstrap, ../OBJDIR == SRCDIR works.
2. For --enable-bootstrap, if ../OBJDIR == SRCDIR, OBJDIR/fixinclude
is an empty directory. The build succeeds, but "make install" fails.
3. For --enable-bootstrap, if ../OBJDIR != SRCDIR, "make install"
succeeds.
4. gccinstall doesn't define "should work" for #2.
I don't know what purpose fixinclude serves. My problem is solved
insofar as I have a working solution. If I may, I would suggest to the
folks who know what fixinclude does that it be made to work for
case #2 above. If that's infeasible, we should update the
documentation to say so.
--jkl
