Hi Herbert,
On 23.02.2012 14:49, Herbert Duerr wrote:
For a long time the old build system had the problem that build
dependencies between modules had to be set manually and this was quite
fragile, of course. It can result in obvious trouble like compile or
link failures and what is more troubling are subtle problems, like
struct changes going unnoticed by a source file depending on it. The
result are hard to debug and "interesting" artifacts.
The dependencies for files are now global (see e.g.
trunk\main\solver\340\wntmsci12\workdir\Dep\CxxObject\svx\source\svdraw\svdobj.d
in a built win environment), it's not like in the old in-house build
system. This is because MKDEPENDSOLVER=TRUE is the default now (I ofteh
set that var since I needed glopal deps for incompatible builds from svx
which happened often to me).
Thus, for building incompatible you do not need to remove the output
trees, I use it and it works pretty well.
For changed configure options it may be pretty different, thus when
changing the configuration for an already built trunk you still have to
know what you are doing.
Still, I would not make it a default to remove all output trees on
default when using bootstrap.
The gbuild process has many benefits one of which is its automatic
handling of dependencies. Volunteers are very welcome to migrate the
remaining modules. In the meantime we have to deal with the dual
gbuild/oldbuild process which complicates the dependency problem more.
The manually set dependencies of the old build system where also not
perfectly debugged which showed when the build order was changed, e.g.
by doing a highly parallel builds on beefy buildbots. Fixing all to the
the old-build dependencies would help too, volunteers are very welcome.
Looking for a solution that works reliably for the very near future I'm
considering to add a "clean output trees" to the bootstrap step. It
would make sure that all is rebuilt when the configuration gets changed.
Of course you could prevent that (by setting an environment variable
DO_KEEP_OUTPUT_TREES) but the default should be to go the "better safe
than sorry" way.
--- a/main/bootstrap.1
+++ b/main/bootstrap.1
@@ -22,3 +22,11 @@ if [ "$DO_FETCH_TARBALLS" = "yes" ]; then
$SRC_ROOT/fetch_tarballs.sh $SRC_ROOT/ooo.lst
fi
+# remove all output trees
+# TODO: this is no longer needed when all dependencies are perfect
+# or when the switch to the gbuild system is complete
+if [[ -n "$DO_KEEP_OUTPUT_TREES" && -n $INPATH && -n $OUTDIR ]]; then
+ echo Removing the output trees
+ rm -rf "*/${INPATH}" "${OUTDIR}"
+fi
+
Herbert
