configure: Make autoconf fail if libtool is not installed.

Otherwise users get an error later like: ./configure: line 5093: syntax error near unexpected token `disable-shared' ./configure: line 5093: `LT_INIT(disable-shared)' It's probably friendlier to make configuration fail earlier. Signed-off-by: Ben Pfaff <[email protected]>
aleeee · Jan 10, 2014 · 32015a3 · 32015a3
1 parent b49c106
commit 32015a3
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/configure.ac b/configure.ac
@@ -41,6 +41,8 @@ AC_C_BIGENDIAN
 AC_SYS_LARGEFILE
 
 LT_INIT([disable-shared])
+m4_pattern_forbid([LT_INIT]) dnl Make autoconf fail if libtool is missing.
+
 AC_SEARCH_LIBS([pow], [m])
 AC_SEARCH_LIBS([clock_gettime], [rt])
 AC_SEARCH_LIBS([timer_create], [rt])