build - simplify registration with macros

Author: jeremylt

Makefile

@@ -655,7 +655,7 @@ endif
 # ------------------------------------------------------------
 
 FORCE:
-$(OBJDIR)/backends/ceed-backend-list.o: FORCE
+$(OBJDIR)/backends/ceed-backend-register.o: FORCE
 
 libceed.o = $(libceed.c:%.c=$(OBJDIR)/%.o) $(libceed.cpp:%.cpp=$(OBJDIR)/%.o) $(libceed.cu:%.cu=$(OBJDIR)/%.o) $(libceed.hip:%.hip.cpp=$(OBJDIR)/%.o) $(libceed.sycl:%.sycl.cpp=$(OBJDIR)/%.o)
 $(filter %fortran.o,$(libceed.o)) : CPPFLAGS += $(if $(filter 1,$(UNDERSCORE)),-DUNDERSCORE)

backends/ceed-backend-init.h

@@ -9,6 +9,6 @@
 #include <ceed/backend.h>
 
 #undef CEED_BACKEND
-#define CEED_BACKEND(name) CEED_INTERN int CeedInit_##name(const char *resource, Ceed ceed);
+#define CEED_BACKEND(name, ...) CEED_INTERN int CeedInit_##name(const char *resource, Ceed ceed);
 #include "../backends/ceed-backend-list.h"
 #undef CEED_BACKEND