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 >= $bison_min_version])
18 if perl -we "exit ((v$bison_version ge v$bison_min_version) ? 0 : 1)"; then
25 AC_DEFUN([AG_GST_FLEX_CHECK],
27 dnl we require flex for building the parser
28 AC_PATH_PROG(FLEX_PATH, flex, no)
29 if test x$FLEX_PATH = xno; then
30 AC_MSG_ERROR(Could not find flex)
33 dnl check flex version
34 dnl we need version >= 2.5.31 for the reentrancy support
36 flex_min_version=2.5.31
37 flex_version=`$FLEX_PATH --version | head -n 1 | awk '{print $2}'`
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)))