From: Yannick Brosseau <yannick.brosseau@gmail.com>
Date: Wed, 17 Jul 2013 18:00:34 +0000 (-0400)
Subject: Test for presence of bison and flex when building from git
X-Git-Tag: v2.3.0-rc1~3
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=6ed497142ebad501c6c6ec277a0b60db22ccaef3

Test for presence of bison and flex when building from git

[ Update by Mathieu Desnoyers: handle VPATH build from tarball
  by prefixing path with $srcdir. ]

Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

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"