[PATCH] openbsc[master]: Remove dependency to autoconf-archive

Harald Welte gerrit-no-reply at lists.osmocom.org
Tue Jan 31 18:55:24 UTC 2017

Hello Jenkins Builder,

I'd like you to reexamine a change.  Please visit


to look at the new patch set (#2).

Remove dependency to autoconf-archive

It is generally not a good idea to add more and more external
dependencies unless absolutely needed.  autoconf-archive is a good
example of that, as we need to update all build machines, and older
OpenEmbedded versions do not appear to have (the right?)
autoconf-archive recipe. Provide local copy of necessary m4 files to fix
the build there.

The dependency to autoconf-archive was introduced in Change-Id

Change-Id: Iacc1958b471ec3fc65307259039e1d496845f528
M openbsc/configure.ac
A openbsc/m4/README
A openbsc/m4/ax_check_compile_flag.m4
3 files changed, 80 insertions(+), 0 deletions(-)

  git pull ssh://gerrit.osmocom.org:29418/openbsc refs/changes/92/1692/2

diff --git a/openbsc/configure.ac b/openbsc/configure.ac
index 7e244bc..6d373a5 100644
--- a/openbsc/configure.ac
+++ b/openbsc/configure.ac
@@ -9,6 +9,9 @@
+dnl FIXME: Remove this once we do not need local macro copies anymore (after upgrade to newer OE?)
 dnl kernel style compile messages
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
diff --git a/openbsc/m4/README b/openbsc/m4/README
new file mode 100644
index 0000000..92eb30b
--- /dev/null
+++ b/openbsc/m4/README
@@ -0,0 +1,3 @@
+We want to avoid creating too many external build-time dependencies
+like this one to autoconf-archive.  This directory provides a local
+copy of required m4 rules.
diff --git a/openbsc/m4/ax_check_compile_flag.m4 b/openbsc/m4/ax_check_compile_flag.m4
new file mode 100644
index 0000000..ca36397
--- /dev/null
+++ b/openbsc/m4/ax_check_compile_flag.m4
@@ -0,0 +1,74 @@
+# ===========================================================================
+#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+# ===========================================================================
+#   Check whether the given FLAG works with the current language's compiler
+#   or gives an error.  (Warnings, however, are ignored)
+#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+#   success/failure.
+#   If EXTRA-FLAGS is defined, it is added to the current language's default
+#   flags (e.g. CFLAGS) when the check is done.  The check is thus made with
+#   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
+#   force the compiler to issue an error when a bad flag is given.
+#   INPUT gives an alternative input source to AC_COMPILE_IFELSE.
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+#   macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
+#   Copyright (c) 2008 Guido U. Draheim <guidod at gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans at gmail.com>
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   Public License for more details.
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+#serial 4
+[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
+AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
+  ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
+  AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
+    [AS_VAR_SET(CACHEVAR,[yes])],
+    [AS_VAR_SET(CACHEVAR,[no])])
+  _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
+  [m4_default([$2], :)],
+  [m4_default([$3], :)])

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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Iacc1958b471ec3fc65307259039e1d496845f528
Gerrit-PatchSet: 2
Gerrit-Project: openbsc
Gerrit-Branch: master
Gerrit-Owner: Max <msuraev at sysmocom.de>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Holger Freyther <holger at freyther.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: daniel <dwillmann at sysmocom.de>

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