Test for presence of bison and flex when building from git

Fixes #74

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 a22b1b93a4cea225c228e61df84af070792fee8f..2b9cc0de5deadca83a22446cee0ee97c2ac91c38 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -23,7 +23,20 @@ LT_INIT
 AC_PROG_YACC
 AC_PROG_LEX
 
-AC_DEFUN([AC_PROG_BISON], [AC_CHECK_PROGS(BISON, bison, bison)]) 
+if test ! -f "$srcdir/formats/ctf/metadata/ctf-parser.h"; then
+        if test x"$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 "$srcdir/formats/ctf/metadata/ctf-lexer.c"; then
+        if test x"$LEX" != "xflex"; then
+                AC_MSG_ERROR([[flex not found and is required when building from git.
+                Please install flex]])
+        fi
+fi
+
 
 AM_PATH_GLIB_2_0(2.22.0, ,AC_MSG_ERROR([glib is required in order to compile BabelTrace - download it from ftp://ftp.gtk.org/pub/gtk]) , gmodule)