When lz4 was compiled before, dovecot will use it as optional dependency:
$ output/host/usr/bin/i586-buildroot-linux-uclibc-readelf -a output/target/usr/lib/dovecot/lib30_imap_zlib_plugin.so | grep NEEDED
0x00000001 (NEEDED) Shared library: [libz.so.1]
0x00000001 (NEEDED) Shared library: [liblzma.so.5]
0x00000001 (NEEDED) Shared library: [liblz4.so.1]
0x00000001 (NEEDED) Shared library: [libc.so.1]
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
DOVECOT_CONF_OPTS += --without-sqlite
endif
+ifeq ($(BR2_PACKAGE_LZ4),y)
+DOVECOT_CONF_OPTS += --with-lz4
+DOVECOT_DEPENDENCIES += lz4
+else
+DOVECOT_CONF_OPTS += --without-lz4
+endif
+
ifeq ($(BR2_PACKAGE_XZ),y)
DOVECOT_CONF_OPTS += --with-lzma
DOVECOT_DEPENDENCIES += xz