Be more careful than just exporting CPPFLAGS (or not) to sub-
configure scripts. This fixes a bug in which --enable-visibility
would cause PRRTE's configure to fail, because the top-level
configure added -Wmissing-prototypes to CPPFLAGS and then
the subconfigure added -Werror at one point. In general,
blindly exporting all the CPPFLAGS OMPI adds was a bad idea, so
we instead only export precious variables if they were
set in the calling environment, on the command line of the
top-level configure, or explicitly added to the sub-
configure environment (like CPPFLAGS for PMIx/PRRTE).
Add some envirnoment scrubbing/saving/restore wrappers and
modify PAC_CONFIG_SUBDIR_ARGS to play a little nicer with
precious variables so that this all works.
Signed-off-by: Brian Barrett <bbarrett@amazon.com>
In reworking the 3rd-party package support for Libevent and HWLOC,
it appears that we missed exporting the opal_<package>_CPPFLAGS
variable (despite documentation). Fix that shortcoming.
Signed-off-by: Brian Barrett <bbarrett@amazon.com>
With Open MPI 5.0, the decision was made to stop building
3rd-party packages, such as Libevent, HWLOC, PMIx, and PRRTE as
MCA components and instead 1) start relying on external libraries
whenever possible and 2) Open MPI builds the 3rd party
libraries (if needed) as independent libraries, rather than
linked into libopen-pal.
This patch moves libevent from an MCA framework to a stand-alone
library built outside of OPAL. A wrapper in opal/util is provided
to minimize the unnecessary changes in the rest of the code. When
using the internal Libevent, it will be installed as a stand-alone
libevent.a, instead of bundled in OPAL. Any pre-installed version
of Libevent at or after 2.0.21 is preferred over the internal
version.
Signed-off-by: Brian Barrett <bbarrett@amazon.com>
