path: root/openbsc/m4
diff options
authorMax <msuraev@sysmocom.de>2017-01-26 16:03:54 +0100
committerHarald Welte <laforge@gnumonks.org>2017-01-31 19:54:58 +0100
commitdac5867af5ff90d4beb70fc30a5743f60f159e3a (patch)
tree13a9cfce85b704595745cba9f2a22b171c12b99c /openbsc/m4
parent3f940fc9eea40873185a240e68992e70a3e8abb4 (diff)
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 Ied9c950dafa65f324cf31298b13b590f56139700 Change-Id: Iacc1958b471ec3fc65307259039e1d496845f528
Diffstat (limited to 'openbsc/m4')
2 files changed, 77 insertions, 0 deletions
diff --git a/openbsc/m4/README b/openbsc/m4/README
new file mode 100644
index 000000000..92eb30ba4
--- /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 000000000..ca3639715
--- /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@gmx.de>
+# Copyright (c) 2011 Maarten Bosmans <mkbosmans@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([$5],[AC_LANG_PROGRAM()])],
+ _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
+ [m4_default([$2], :)],
+ [m4_default([$3], :)])