I submited a patch to simplify / clear the build by removing entirely the archs not targeted: https://gerrit.osmocom.org/7146
However, there's still an issue during make maintainer-clean (it's different one now):
rm -rf ./.deps
rm -f Makefile
make[1]: Leaving directory '/home/pespin/dev/sysmocom/build/new/tmpdir/osmo-trx/GSM'
Making maintainer-clean in Transceiver52M
make[1]: Entering directory '/home/pespin/dev/sysmocom/build/new/tmpdir/osmo-trx/Transceiver52M'
Making maintainer-clean in x86
make[2]: Entering directory '/home/pespin/dev/sysmocom/build/new/tmpdir/osmo-trx/Transceiver52M/x86'
rm -rf .libs _libs
rm -rf ../common/.libs ../common/_libs
test -z "libarch.la libarch_sse_3.la libarch_sse_4_1.la" || rm -f libarch.la libarch_sse_3.la libarch_sse_4_1.la
rm -f ./so_locations
rm -f *.o
rm -f ../common/*.o
rm -f ../common/*.lo
rm -f *.lo
rm -f *.tab.c
test -z "" || rm -f
test . = "/home/pespin/dev/sysmocom/git/osmo-trx/Transceiver52M/x86" || test -z "" || rm -f
rm -f ../common/.deps/.dirstamp
rm -f ../common/.dirstamp
rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
This command is intended for maintainers to use
it deletes files that may require special tools to rebuild.
rm -rf ../common/.deps ./.deps
rm -f Makefile
make[2]: Leaving directory '/home/pespin/dev/sysmocom/build/new/tmpdir/osmo-trx/Transceiver52M/x86'
Making maintainer-clean in arm
/bin/sh: line 20: cd: arm: No such file or directory
make[1]: *** [Makefile:804: maintainer-clean-recursive] Error 1
make[1]: Leaving directory '/home/pespin/dev/sysmocom/build/new/tmpdir/osmo-trx/Transceiver52M'
make: *** [Makefile:506: maintainer-clean-recursive] Error 1
Strangely enough, no "arm" dir is shown during configure/make output, but grepping for "arm" on the builddir shows:
Transceiver52M/Makefile
319:DIST_SUBDIRS = x86 arm
508:#ARCH_LA = $(top_builddir)/Transceiver52M/arm/libarch.la
514:#SUBDIRS = arm
so it seems DIST_SBUDIRS is being set to use arm by default (it checks all subdirs by default?). It may be worth reading the docs for that variable and see if setting it manually helps.
Also, next steps: have a look at config.log and config.status.
