Makefile: don't error out under DC_SHA1_EXTERNAL if DC_SHA1_SUBMODULE=auto

diff --git a/Makefile b/Makefile
index e53750ca01afbd7d777e62aa221f6861f66b0703..aa680269e895aed59e6e431e39fead05f50141b2 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1497,7 +1497,9 @@ else
        LIB_OBJS += sha1dc_git.o
 ifdef DC_SHA1_EXTERNAL
        ifdef DC_SHA1_SUBMODULE
+               ifneq ($(DC_SHA1_SUBMODULE),auto)
 $(error Only set DC_SHA1_EXTERNAL or DC_SHA1_SUBMODULE, not both)
+               endif
        endif
        BASIC_CFLAGS += -DDC_SHA1_EXTERNAL
        EXTLIBS += -lsha1detectcoll