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dnl Copyright (C) 2010 Monty Taylor
dnl Copyright (C) 2010 Hartmut Holzgraefe
dnl This file is free software; Monty Taylor and Hartmut Holzgraefe
dnl give unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([_PANDORA_SEARCH_BISON],[
dnl --------------------------------------------------------------------
dnl Check for bison
dnl --------------------------------------------------------------------
AC_CHECK_PROGS([YACC], ['bison -y'], [:])
AS_IF([test "x$YACC" = "x:"],[
pandora_have_bison=no
YACC='if test -f "$@"; then echo "WARNING: no proper bison binary found, ignoring changes to $<"; exit 0; else echo "ERROR: no proper bison binary found"; exit 1; fi;'
],[
pandora_have_bison=yes
])
AM_CONDITIONAL(HAVE_BISON, [test "x${pandora_have_bison}" = "xyes"])
])
AC_DEFUN([PANDORA_HAVE_BISON],[
AC_REQUIRE([_PANDORA_SEARCH_BISON])
])
AC_DEFUN([PANDORA_REQUIRE_BISON],[
AC_REQUIRE([PANDORA_HAVE_BISON])
AS_IF([test "x${pandora_have_bison}" = "xno" -a "$pandora_building_from_bzr" = "yes"],
AC_MSG_ERROR(["bison is required for ${PACKAGE} to build from a bzr branch"])
)
])
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