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