split off and compile util.c separately

Makefile

@@ -19,10 +19,11 @@ $(1).shared.o: $(2)
 $(1).static.o: $(2)
 endef
 
+SOURCES = libuci.c file.c ucimap.c util.c
 
 all: uci libuci.$(SHLIB_EXT) uci-static ucimap-example
 
-$(eval $(call add_dep,libuci,history.c list.c util.c uci.h uci_config.h uci_internal.h))
+$(eval $(call add_dep,libuci,history.c list.c uci.h uci_config.h uci_internal.h))
 $(eval $(call add_dep,ucimap,uci.h uci_config.h ucimap.h))
 
 cli.o: cli.c uci.h uci_config.h
@@ -56,12 +57,12 @@ uci-static: cli.o libuci.a
 
 ucimap.c: ucimap.h uci.h
 
-libuci.a: libuci.static.o ucimap.static.o file.static.o
+libuci.a: $(patsubst %.c,%.static.o, $(SOURCES))
 	rm -f $@
 	$(AR) rc $@ $^
 	$(RANLIB) $@
 
-libuci.$(SHLIB_EXT): libuci.shared.o file.shared.o ucimap.shared.o
+libuci.$(SHLIB_EXT): $(patsubst %.c,%.shared.o, $(SOURCES))
 	$(LINK) $(SHLIB_FLAGS) -o $(SHLIB_FILE) $^ $(LIBS)
 	ln -sf $(SHLIB_FILE) $@
 

libuci.c

@@ -43,7 +43,6 @@ static const char *uci_errstr[] = {
 static void uci_unload_plugin(struct uci_context *ctx, struct uci_plugin *p);
 
 #include "uci_internal.h"
-#include "util.c"
 #include "list.c"
 #include "history.c"
 

list.c

@@ -127,6 +127,22 @@ uci_alloc_list(struct uci_section *s, const char *name)
 	return o;
 }
 
+/* Based on an efficient hash function published by D. J. Bernstein */
+static unsigned int djbhash(unsigned int hash, char *str)
+{
+	int len = strlen(str);
+	int i;
+
+	/* initial value */
+	if (hash == ~0)
+		hash = 5381;
+
+	for(i = 0; i < len; i++) {
+		hash = ((hash << 5) + hash) + str[i];
+	}
+	return (hash & 0x7FFFFFFF);
+}
+
 /* fix up an unnamed section, e.g. after adding options to it */
 __private void uci_fixup_section(struct uci_context *ctx, struct uci_section *s)
 {

util.c

@@ -16,6 +16,7 @@
  * This file contains misc utility functions and wrappers to standard
  * functions, which throw exceptions upon failure.
  */
+#define _GNU_SOURCE
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/file.h>
@@ -24,6 +25,11 @@
 #include <ctype.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "uci.h"
+#include "uci_internal.h"
 
 __plugin void *uci_malloc(struct uci_context *ctx, size_t size)
 {
@@ -57,22 +63,6 @@ __plugin char *uci_strdup(struct uci_context *ctx, const char *str)
 	return ptr;
 }
 
-/* Based on an efficient hash function published by D. J. Bernstein */
-static unsigned int djbhash(unsigned int hash, char *str)
-{
-	int len = strlen(str);
-	int i;
-
-	/* initial value */
-	if (hash == ~0)
-		hash = 5381;
-
-	for(i = 0; i < len; i++) {
-		hash = ((hash << 5) + hash) + str[i];
-	}
-	return (hash & 0x7FFFFFFF);
-}
-
 /*
  * validate strings for names and types, reject special characters
  * for names, only alphanum and _ is allowed (shell compatibility)