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autoreconf v2.69 with subdir-objects: ./configure creates directory 'src


From: Neels Hofmeyr
Subject: autoreconf v2.69 with subdir-objects: ./configure creates directory 'src/tests/\$(top_srcdir)'
Date: Thu, 14 Jan 2016 14:40:38 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

Dear autoconf,

I am observing a bug with `autoreconf -i`.
To my/our knowledge, this is not due to an error in
our configuration but a genuine bug from 'subdir-objects'.

The symptom: after running ./configure, I find a directory
  src/tests/\$(top_srcdir)

(The string that looks like a variable that is to be expanded is written to the
file system in verbatim, as the directory name.)

The weird dir contains only a .deps dir with dependency files for the src/*
files (not for src/tests/* files as one might expect).

If I remove 'subdir-objects' from configure.ac, the weird dir is not created.


Reproduction recipe on debian stable:

▶ autoreconf --version
autoreconf (GNU Autoconf) 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David J. MacKenzie and Akim Demaille.


▶ git clone git://git.osmocom.org/osmo-iuh
Cloning into 'osmo-iuh'...
remote: Counting objects: 5945, done.
remote: Compressing objects: 100% (2661/2661), done.
remote: Total 5945 (delta 4991), reused 3757 (delta 3228)
Receiving objects: 100% (5945/5945), 12.11 MiB | 8.97 MiB/s, done.
Resolving deltas: 100% (4991/4991), done.
Checking connectivity... done.

▶ cd osmo-iuh/

▶ sed -i 's/^PKG_/dnl &/' configure.ac

▶ autoreconf -i
aclocal: warning: couldn't open directory 'm4': No such file or directory
libtoolize: putting auxiliary files in `.'.
libtoolize: copying file `./ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIR, `m4'.
libtoolize: copying file `m4/libtool.m4'
libtoolize: copying file `m4/ltoptions.m4'
libtoolize: copying file `m4/ltsugar.m4'
libtoolize: copying file `m4/ltversion.m4'
libtoolize: copying file `m4/lt~obsolete.m4'
libtoolize: Consider adding `-I m4' to ACLOCAL_AMFLAGS in Makefile.am.
configure.ac:5: installing './compile'
configure.ac:5: installing './config.guess'
configure.ac:5: installing './config.sub'
configure.ac:7: installing './install-sh'
configure.ac:7: installing './missing'
src/Makefile.am: installing './depcomp'

▶ ./configure
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking how to print strings... printf
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether gcc understands -c and -o together... yes
checking for a sed that does not truncate output... /bin/sed
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for fgrep... /bin/grep -F
checking for ld used by gcc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking how to convert x86_64-unknown-linux-gnu file names to 
x86_64-unknown-linux-gnu format... func_convert_file_noop
checking how to convert x86_64-unknown-linux-gnu file names to toolchain 
format... func_convert_file_noop
checking for /usr/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... @
checking for strip... strip
checking for ranlib... ranlib
checking for gawk... no
checking for mawk... mawk
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for sysroot... no
checking for mt... mt
checking if mt is a manifest tool... no
checking how to run the C preprocessor... gcc -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC -DPIC
checking if gcc PIC flag -fPIC -DPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.o... (cached) yes
checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared 
libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking whether make sets $(MAKE)... yes
checking for style of include used by make... GNU
checking whether make supports nested variables... yes
checking dependency style of gcc... gcc3
checking whether make supports nested variables... (cached) yes
checking whether make sets $(MAKE)... (cached) yes
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking whether gcc understands -c and -o together... (cached) yes
checking for ANSI C header files... (cached) yes
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating libosmo-ranap.pc
config.status: creating src/Makefile
config.status: creating src/hnbap/Makefile
config.status: creating src/ranap/Makefile
config.status: creating src/rua/Makefile
config.status: creating src/tests/Makefile
config.status: creating Makefile
config.status: creating include/Makefile
config.status: creating include/osmocom/Makefile
config.status: creating include/osmocom/hnbap/Makefile
config.status: creating include/osmocom/ranap/Makefile
config.status: creating include/osmocom/rua/Makefile
config.status: executing libtool commands
config.status: executing depfiles commands
config.status: executing src/tests/atconfig commands

▶ ls -F src/tests/
atconfig        Makefile       test_common.h    test-hnbap.ok  $(top_srcdir)/
dummy_cn_sua.c  Makefile.am    test-helpers.c   test-ranap.c
hnb-test.c      Makefile.in    test-helpers.ok  test-ranap.ok
hnb-test.h      test_common.c  test-hnbap.c     testsuite.at


Observe '$(top_srcdir)/' in file listing.


▶ ls -aR src/tests/\$\(top_srcdir\)/
src/tests/$(top_srcdir)/:
./  ../  src/

src/tests/$(top_srcdir)/src:
./  ../  .deps/

src/tests/$(top_srcdir)/src/.deps:
./   hnbap_common.Po   hnbap_encoder.Po  rua_decoder.Po  rua_msg_factory.Po
../  hnbap_decoder.Po  rua_common.Po     rua_encoder.Po



Please excuse my not trying to verify the bug with the latest sources. To my
knowledge, this bug applies to the latest released version (2.69) and I hope it
will not be an effort to you if the bug is already known to be fixed.

Thank you for your time!

~Neels

(I am not subscribed to any autoconf ML, hence a Cc to my sender address is
appreciated)

-- 
- Neels Hofmeyr <address@hidden>          http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschäftsführer / Managing Directors: Holger Freyther, Harald Welte

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