1 AC_DEFUN([GST_BISON_CHECK],
3 dnl FIXME: check if AC_PROG_YACC is suitable here
4 dnl FIXME: make precious
5 AC_PATH_PROG(BISON_PATH, bison, no)
6 if test x$BISON_PATH = xno; then
7 AC_MSG_ERROR(Could not find bison)
10 dnl check bison version
11 bison_min_version=1.35
12 bison_version=`$BISON_PATH --version | head -n 1 | sed 's/^.*) //' | sed 's/[[a-zA-Z]]*$//' | cut -d' ' -f1`
13 AC_MSG_CHECKING([bison version $bison_version >= $bison_min_version])
16 exit ($bison_version < $bison_min_version) ? 0 : 1;
22 AC_MSG_ERROR([Your bison version is too old, $bison_min_version or later is required.])
26 AC_DEFUN([GST_FLEX_CHECK],
28 dnl we require flex for building the parser
29 dnl FIXME: check if AC_PROG_LEX is suitable here
30 AC_PATH_PROG(FLEX_PATH, flex, no)
31 if test x$FLEX_PATH = xno; then
32 AC_MSG_ERROR(Could not find flex)
35 dnl check flex version
36 flex_min_version=2.5.6
37 flex_version=`$FLEX_PATH --version | head -n 1 | sed 's/^.* //' | sed 's/[[a-zA-Z]]*$//' | cut -d' ' -f1`
38 AC_MSG_CHECKING([flex version $flex_version >= $flex_min_version])
40 (\$min_version_major, \$min_version_minor, \$min_version_micro ) = "$flex_min_version" =~ /(\d+)\.(\d+)\.(\d+)/;
41 (\$flex_version_major, \$flex_version_minor, \$flex_version_micro ) = "$flex_version" =~ /(\d+)\.(\d+)\.(\d+)/;
42 exit (((\$flex_version_major > \$min_version_major) ||
43 ((\$flex_version_major == \$min_version_major) &&
44 (\$flex_version_minor >= \$min_version_minor)) ||
45 ((\$flex_version_major == \$min_version_major) &&
46 (\$flex_version_minor >= \$min_version_minor) &&
47 (\$flex_version_micro >= \$min_version_micro)))
52 AC_DEFINE(HAVE_MT_SAVE_FLEX, 1,
53 [Defined if we have recent enough flex, which is MT save])