X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=configure.ac;h=b7af59a10f7597f28a9b6f6879bdd2b3c87f6f0a;hp=b274ead5ac3c10f488630780aeae58eef1865fec;hb=ea70e63479617a9fe92c9f370e43e842a31d0489;hpb=926c87acbc722208f46ac43f3a837c994af88763

diff --git a/configure.ac b/configure.ac
index b274ead5a..b7af59a10 100644
--- a/configure.ac
+++ b/configure.ac
@@ -455,6 +455,10 @@ if test ! -f "$srcdir/src/lib/lttng-ctl/filter/filter-lexer.c"; then
 		AC_MSG_ERROR([[flex not found and is required when building from git.
 		Please install flex]])
 	fi
+	AC_PATH_PROG([FLEX],[flex])
+	AX_PROG_FLEX_VERSION([2.5.35], [],[
+		AC_MSG_ERROR([[Flex >= 2.5.35 is required when building from git]])
+	])
 fi
 
 CFLAGS="-Wall $CFLAGS -g -fno-strict-aliasing"