1 AC_DEFUN([AG_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$BISON_PATH = xno; then
7 AC_MSG_ERROR(Could not find bison)
10 dnl check bison version
11 dnl we need version >= 1.875 for the reentrancy support
13 dnl First lines observed: 'bison (GNU Bison) 2.3' or 'GNU Bison version 1.28'
14 bison_min_version=1.875
15 bison_version=`$BISON_PATH --version | head -n 1 | sed 's/^[[^0-9]]*//' | sed 's/[[^0-9]]*$//' | cut -d' ' -f1`
16 AC_MSG_CHECKING([bison version $bison_version >= $bison_min_version])
19 exit ($bison_version < $bison_min_version) ? 0 : 1;
28 AC_DEFUN([AG_GST_FLEX_CHECK],
30 dnl we require flex for building the parser
31 AC_PATH_PROG(FLEX_PATH, flex, no)
32 if test x$FLEX_PATH = xno; then
33 AC_MSG_ERROR(Could not find flex)
36 dnl check flex version
37 dnl we need version >= 2.5.31 for the reentrancy support
39 flex_min_version=2.5.31
40 flex_version=`$FLEX_PATH --version | head -n 1 | sed 's/^.* //' | sed 's/[[a-zA-Z]]*$//' | cut -d' ' -f1`
41 AC_MSG_CHECKING([flex version $flex_version >= $flex_min_version])
43 (\$min_version_major, \$min_version_minor, \$min_version_micro ) = "$flex_min_version" =~ /(\d+)\.(\d+)\.(\d+)/;
44 (\$flex_version_major, \$flex_version_minor, \$flex_version_micro ) = "$flex_version" =~ /(\d+)\.(\d+)\.(\d+)/;
45 exit (((\$flex_version_major > \$min_version_major) ||
46 ((\$flex_version_major == \$min_version_major) &&
47 (\$flex_version_minor > \$min_version_minor)) ||
48 ((\$flex_version_major == \$min_version_major) &&
49 (\$flex_version_minor == \$min_version_minor) &&
50 (\$flex_version_micro >= \$min_version_micro)))