X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=configure.ac;h=33c54fc079ecf5f2d418495f9c89bfe42581b41e;hp=9d93791bfb7012950ab65139404fdd5025abb0e1;hb=6ed497142ebad501c6c6ec277a0b60db22ccaef3;hpb=a54047ecf126f260785dc2f88e8969b3b0a0577c

diff --git a/configure.ac b/configure.ac
index 9d93791bf..33c54fc07 100644
--- a/configure.ac
+++ b/configure.ac
@@ -287,7 +287,19 @@ LT_INIT
 AC_PROG_YACC
 AC_PROG_LEX
 
-AC_DEFUN([AC_PROG_BISON], [AC_CHECK_PROGS(BISON, bison, bison)])
+if test ! -f "$srcdir/src/lib/lttng-ctl/filter/filter-parser.h"; then
+	if test x"$YACC" != "xbison -y"; then
+		AC_MSG_ERROR([[bison not found and is required when building from git.
+		Please install bison]])
+	fi
+fi
+
+if test ! -f "$srcdir/src/lib/lttng-ctl/filter/filter-lexer.c"; then
+	if test x"$LEX" != "xflex"; then
+		AC_MSG_ERROR([[flex not found and is required when building from git.
+		Please install flex]])
+	fi
+fi
 
 CFLAGS="-Wall $CFLAGS -g -fno-strict-aliasing"