configure.ac

   1 # SPDX-License-Identifier: GPL-3.0-only
   2
   3 AC_PREREQ([2.61])
   4 # only for configure -h, see Makefile
   5 AC_INIT([software], [packages])
   6 AC_CONFIG_HEADERS([config.h])
   7 AC_CONFIG_FILES([config.mak])
   8 AC_USE_SYSTEM_EXTENSIONS
   9 AC_PROG_CC
  10 AC_PROG_CPP
  11
  12 AC_DEFUN([REQUIRE_EXECUTABLE], [
  13         AC_PATH_PROG(m4_toupper([$1]), [$1])
  14         test -z "$m4_toupper([$1])" && AC_MSG_ERROR([$1 is required])
  15 ])
  16 REQUIRE_EXECUTABLE([m4])
  17 REQUIRE_EXECUTABLE([flex])
  18 REQUIRE_EXECUTABLE([bison])
  19
  20 HAVE_LOPSUB=yes
  21 AC_CHECK_HEADER(lopsub.h, [], [HAVE_LOPSUB=no])
  22 AC_CHECK_LIB([lopsub], [lls_merge], [], [HAVE_LOPSUB=no])
  23 if test $HAVE_LOPSUB == no; then AC_MSG_ERROR([
  24         The lopsub library is required to build this software, but
  25         the above checks indicate it is not installed on your system.
  26
  27         On Debian/Ubuntu systems you mny install the liblopsub-dev package.
  28         Alternatively, run the following command to download a copy.
  29                 git clone https://git.tuebingen.mpg.de/lopsub.git
  30         Install the library, then run this configure script again.
  31
  32         If you installed lopsub at a non-standard location, make sure to set
  33         PATH, CPPFLAGS and LDFLAGS accordingly. For example:
  34
  35                 pfx=/prefix/where/lopsub/is/installed
  36                 export PATH=\$pfx/bin:\$PATH
  37                 export CPPFLAGS=-I\$pfx/include
  38                 export LDFLAGS=-L\$pfx/lib
  39 ])
  40 fi
  41 REQUIRE_EXECUTABLE([lopsubgen])
  42 AC_OUTPUT