Makes sure that flex version is greater or equal to the version indicated. If true the shell commands in ACTION-IF-TRUE are executed. If not the shell commands in commands in ACTION-IF-TRUE are executed. If not the shell commands in ACTION-IF-FALSE are run. Note if $FLEX is not set (for example by running AC_CHECK_PROG or AC_PATH_PROG) the macro will fail.
AC_PATH_PROG([FLEX],[flex]) AX_PROG_FLEX_VERSION([2.5.39],[ ... ],[ ... ])
This will check to make sure that the flex you have is at least version 2.5.39 or greater.
NOTE: This macro uses the $FLEX variable to perform the check.
Download the latest version of ax_prog_flex_version.m4 or browse the macro’s revision history.
Copyright © 2015 Jonathan Rajotte-Julien email@example.com
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