# Define NO_OPENSSL environment variable if you do not have OpenSSL.
# This also implies BLK_SHA1.
#
-# Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
-# able to use Perl-compatible regular expressions.
+# Define USE_LIBPCRE if you have and want to use libpcre. Various
+# commands such as log and grep offer runtime options to use
+# Perl-compatible regular expressions instead of standard or extended
+# POSIX regular expressions.
#
# Define LIBPCREDIR=/foo/bar if your libpcre header and library files are in
# /foo/bar/include and /foo/bar/lib directories.
LIB_OBJS += refs.o
LIB_OBJS += refs/files-backend.o
LIB_OBJS += refs/iterator.o
+LIB_OBJS += refs/ref-cache.o
LIB_OBJS += ref-filter.o
LIB_OBJS += remote.o
LIB_OBJS += replace_object.o