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configure: provide advice if PKG_PROG_PKG_CONFIG unavailable 

These are the misleading error messages that this change prevents:
configure.ac:13: error: possibly undefined macro: AC_MSG_WARN
  If this token and others are legitimate, please use m4_pattern_allow.
  See the Autoconf documentation.
configure.ac:48: error: possibly undefined macro: AC_DEFINE
configure.ac:342: error: possibly undefined macro: AC_MSG_ERROR
configure.ac:608: error: possibly undefined macro: AC_MSG_NOTICE

Change-Id: I21bcc7715eeac0f3d0bcc60bba6801e6a895cdd0
Signed-off-by: R. Diez <rdiezmail-openocd@yahoo.de>
Reviewed-on: https://review.openocd.org/c/openocd/+/7035
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
R. Diez 2022-06-18 16:23:00 +02:00 committed by Antonio Borneo
parent a70bab9e51
commit c7bdce33e2
1 changed files with 6 additions and 0 deletions
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6
configure.ac
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@ -24,6 +24,12 @@ AC_PROG_CC
m4_version_prereq([2.70],[],[AC_PROG_CC_C99])
AM_PROG_CC_C_O
AC_PROG_RANLIB
# If macro PKG_PROG_PKG_CONFIG is not available, Autoconf generates a misleading error message,
# so check for existence first, and otherwise provide helpful advice.
m4_ifndef([PKG_PROG_PKG_CONFIG], [m4_fatal(m4_normalize([
Macro PKG_PROG_PKG_CONFIG is not available.
It is usually defined in file pkg.m4 provided by package pkg-config.]))])
PKG_PROG_PKG_CONFIG([0.23])
dnl disable checks for C++, Fortran and GNU Java Compiler