Commit c22b0a7f authored by Stefan Kost's avatar Stefan Kost

m4/gst-parser.m4: check for bison and flex

Original commit message from CVS:
* m4/gst-parser.m4:
check for bison and flex
parent 53ecdc0c
2006-07-21 Stefan Kost <ensonic@users.sf.net>
* m4/gst-parser.m4:
check for bison and flex
2006-07-13 Thomas Vander Stichele <thomas at apestaart dot org>
* m4/gst-plugin-docs.m4:
......
AC_DEFUN([GST_BISON_CHECK],
[
dnl FIXME: check if AC_PROG_YACC is suitable here
dnl FIXME: make precious
AC_PATH_PROG(BISON_PATH, bison, no)
if test x$BISON_PATH = xno; then
AC_MSG_ERROR(Could not find bison)
fi
dnl check bison version
bison_min_version=1.35
bison_version=`$BISON_PATH --version | head -n 1 | sed 's/^.*) //'|cut -d' ' -f1`
AC_MSG_CHECKING([bison version $bison_version >= $bison_min_version])
if perl -w <<EOF
exit ($bison_version < $bison_min_version) ? 0 : 1;
EOF
then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
AC_MSG_ERROR([Your bison version is too old, $bison_min_version or later is required.])
fi
])
AC_DEFUN([GST_FLEX_CHECK],
[
dnl we require flex for building the parser
dnl FIXME: check if AC_PROG_LEX is suitable here
AC_PATH_PROG(FLEX_PATH, flex, no)
if test x$FLEX_PATH = xno; then
AC_MSG_ERROR(Could not find flex)
fi
dnl check flex version
flex_min_version=2.5.6
flex_version=`$FLEX_PATH --version | head -n 1 | sed 's/^.* //'|cut -d' ' -f1`
AC_MSG_CHECKING([flex version $flex_version >= $flex_min_version])
if perl -w <<EOF
(\$min_version_major, \$min_version_minor, \$min_version_micro ) = "$flex_min_version" =~ /(\d+)\.(\d+)\.(\d+)/;
(\$flex_version_major, \$flex_version_minor, \$flex_version_micro ) = "$flex_version" =~ /(\d+)\.(\d+)\.(\d+)/;
exit (((\$flex_version_major > \$min_version_major) ||
((\$flex_version_major == \$min_version_major) &&
(\$flex_version_minor >= \$min_version_minor)) ||
((\$flex_version_major == \$min_version_major) &&
(\$flex_version_minor >= \$min_version_minor) &&
(\$flex_version_micro >= \$min_version_micro)))
? 0 : 1);
EOF
then
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_MT_SAVE_FLEX, 1,
[Defined if we have recent enough flex, which is MT save])
else
AC_MSG_RESULT(no)
fi
])
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