configure.ac: fix bashisms

diff --git a/configure.ac b/configure.ac
index 3ba3028..0c8eb76 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -40,9 +40,9 @@ case $host in
        AC_MSG_ERROR([unsupported operating system])
 esac
 
-AM_CONDITIONAL([OS_LINUX], [test "x$backend" == "xlinux"])
-AM_CONDITIONAL([OS_DARWIN], [test "x$backend" == "xdarwin"])
-AM_CONDITIONAL([THREADS_POSIX], [test "x$threads" == "xposix"])
+AM_CONDITIONAL([OS_LINUX], [test "x$backend" = "xlinux"])
+AM_CONDITIONAL([OS_DARWIN], [test "x$backend" = "xdarwin"])
+AM_CONDITIONAL([THREADS_POSIX], [test "x$threads" = "xposix"])
 
 # Library versioning
 lt_major="0"