On Thu, 24 Jul 2014, Bert Wesarg wrote:
On 07/24/2014 02:52 PM, Peter Breitenlohner wrote:
This typically occurs when you try to create a file (symlink) in a nonexistent directory. In such situations the make rules must ensure that such directories exist, e.g., via some_target: Some_prerequisite $(MKDIR_P) hooks $(LN_S) $(srcdir)/hooks/vt_unify_hooks_base.cc hooks/vt_unify_hooks_base.ccBut the dep rules should already ensure this, as it creates the .deps directory at the end of configure. Though if this is not guaranteed to happen (maybe it depends on the used compiler) than we would need to ensure it in the makefile itself.
perhaps true, and I actually don't know where the 'ln -s' comes from.
Does someone know the details from autoconf about this?
at least part of the problem comes from the Automake option 'subdir-objects'
together with the *_SOURCES defined in Makefile.common in the directories
openmpi-1.8.1/ompi/contrib/vt/vt/tools/{vtunify,vtfilter}/
defining source files as, e.g.,
$(VTUNIFYSRCDIR)/hooks/vt_unify_hooks_aevents.cc
together with
VTUNIFYSRCDIR = $(srcdir)
It was never required (nor recommended) to specify explicitly that sources
are in the source tree, Automake-generated rules always try to find the file
first in the build tree and then in the source tree.
Together with 'subdir-objects' and Automake 1.14.1 this has disastrous effects:
foo_SOURCES = foo.c ${srcdir}/sub/foosub.c
creates the dependency file
'${srcdir}'/sub/.deps/foosub.Po
in the build tree but needs
${srcdir}/sub/.deps/foosub.Po
and therefore fails. SIMILARLY
foo_SOURCES = foo.c $(srcdir)/sub/foosub.c
creates
'$(srcdir)'/sub/.deps/foosub.Po
but needs
$(srcdir)/sub/.deps/foosub.Po
and fails. Finally
foo_SOURCES = foo.c @srcdir@/sub/foosub.c
tries to create
sub/foosub.o
sub/.deps
and succeeds if the source tree is writable but 'make distcheck' with its
read-only source tree fails as demonstrated by the attached tiny tarball. Part of all that is due to a bug in Automake 1.14.1 that will probably be fixed in 1.14.2, but one should certainly not say explicitly that source files are in the source tree. Regards Peter
foo-1.0.tar.gz
Description: Binary data
