BUILD: support new automake

new automake requires subdirs-object directive, to resolve this:

09:43:37 automake: warning: possible forward-incompatibility.
09:43:37 automake: At least a source file is in a subdirectory, but the 'subdir-objects'
09:43:37 automake: automake option hasn't been enabled.  For now, the corresponding output
09:43:37 automake: object file(s) will be placed in the top-level directory.  However,
09:43:37 automake: this behaviour will change in future Automake versions: they will
09:43:37 automake: unconditionally cause object files to be placed in the same subdirectory
09:43:37 automake: of the corresponding sources.
09:43:37 automake: You are advised to start using 'subdir-objects' option throughout your
09:43:37 automake: project, to avoid future incompatibilities.
09:43:37 tools/otfmerge/Makefile.common:13: warning: source file '$(OTFMERGESRCDIR)/otfmerge.c' is in a subdirectory,
09:43:37 tools/otfmerge/Makefile.common:13: but option 'subdir-objects' is disabled

cmr=v1.8.2:reviewer=ompi-rm1.8

This commit was SVN r32225.

contrib/build-mca-comps-outside-of-tree/configure.ac

@@ -25,7 +25,7 @@ AC_INIT([openmpi_btl_tcp2], [1.0.0],
 AC_CONFIG_AUX_DIR(config)
 AC_CONFIG_MACRO_DIR(config)
 
-AM_INIT_AUTOMAKE([foreign dist-bzip2 no-define 1.11])
+AM_INIT_AUTOMAKE([foreign dist-bzip2 no-define 1.11 subdir-objects])
 AM_SILENT_RULES([yes])
 
 AC_LANG([C])

ompi/contrib/vt/vt/configure.ac

@@ -5,7 +5,7 @@ AC_PREREQ(2.60)
 AC_INIT([VampirTrace], [m4_normalize(esyscmd([cat VERSION]))], [vampirsupport@zih.tu-dresden.de], [VampirTrace])
 AC_CONFIG_AUX_DIR(config)
 AC_CONFIG_MACRO_DIR(config/m4)
-AM_INIT_AUTOMAKE([foreign])
+AM_INIT_AUTOMAKE([foreign subdir-objects])
 AC_CONFIG_HEADERS(config.h)
 
 # If Automake supports silent rules, enable them.

ompi/contrib/vt/vt/extlib/otf/configure.ac

@@ -8,7 +8,7 @@ AC_INIT([OTF],
 AC_CONFIG_AUX_DIR(config)
 AC_CONFIG_MACRO_DIR(config/m4)
 AC_CANONICAL_SYSTEM
-AM_INIT_AUTOMAKE([foreign])
+AM_INIT_AUTOMAKE([foreign subdir-objects])
 AC_CONFIG_HEADERS([config.h])
 
 # If Automake supports silent rules, enable them.

opal/mca/event/libevent2021/libevent/configure.ac

@@ -13,7 +13,7 @@ AC_INIT([libevent], [2.0.21-stable], [http://libevent.org], [libevent])
 AC_CONFIG_MACRO_DIR([m4])
 
 # Open MPI: changed to one 1 arg AM INIT_AUTOMAKE
-AM_INIT_AUTOMAKE([foreign])
+AM_INIT_AUTOMAKE([foreign subdir-objects])
 # Open MPI: changed AM CONFIG_HEADER to AC CONFIG_HEADERS
 AC_CONFIG_HEADERS(config.h)
 AC_DEFINE(NUMERIC_VERSION, 0x02001500, [Numeric representation of the version])