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build: only add 'serial-tests' for automake >= 1.12

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Earlier versions of automake complain if they get a configuration
parameter which they don't understand.  The error is:

configure.ac:19: option `serial-tests' not recognized

Use some m4 hackery to work around this.

Stolen from here by jklimes:
https://www.redhat.com/archives/libguestfs/2013-February/msg00102.html
This commit is contained in:
Jiří Klimeš 2013-07-30 12:17:17 +02:00
parent b502b6cd58
commit 4aa56de14c
1 changed files with 14 additions and 1 deletions
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15
configure.ac
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@ -16,7 +16,20 @@ AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_AUX_DIR([build-aux])
AM_INIT_AUTOMAKE([1.11 serial-tests tar-ustar no-dist-gzip dist-bzip2 -Wno-portability])
dnl Initialize automake. automake < 1.12 didn't have serial-tests and
dnl gives an error if it sees this, but for automake >= 1.13
dnl serial-tests is required so we have to include it. Solution is to
dnl test for the version of automake (by running an external command)
dnl and provide it if necessary. Note we have to do this entirely using
dnl m4 macros since automake queries this macro by running
dnl 'autoconf --trace ...'.
m4_define([serial_tests], [
m4_esyscmd([automake --version |
head -1 |
awk '{split ($NF,a,"."); if (a[1] == 1 && a[2] >= 12) { print "serial-tests" }}'
])
])
AM_INIT_AUTOMAKE(1.11 serial_tests tar-ustar no-dist-gzip dist-bzip2 -Wno-portability) dnl NB: Do not [quote] this parameter.
AM_MAINTAINER_MODE([enable])
AM_SILENT_RULES([yes])