[core] silence compiler warnings if !HAVE_FORK

silence compiler warnings if HAVE_FORK is not set

However, if HAVE_FORK is not set, then -Werror was probably passed to
./configure, which is currently a mistake.  lighttpd can successfully
compiles src/ with -Werror on many platforms, but ./configure tests
should not be run with -Werror. [gstrauss]

github: closes #81

x-ref:
   "Fix warnings"
   https://github.com/lighttpd/lighttpd1.4/pull/81

src/mod_fastcgi.c

@@ -348,6 +348,7 @@ typedef struct {
 /* ok, we need a prototype */
 static handler_t fcgi_handle_fdevent(server *srv, void *ctx, int revents);
 
+#ifdef HAVE_FORK
 static void reset_signals(void) {
 #ifdef SIGTTOU
 	signal(SIGTTOU, SIG_DFL);
@@ -362,6 +363,7 @@ static void reset_signals(void) {
 	signal(SIGPIPE, SIG_DFL);
 	signal(SIGUSR1, SIG_DFL);
 }
+#endif /* HAVE_FORK */
 
 static void fastcgi_status_copy_procname(buffer *b, fcgi_extension_host *host, fcgi_proc *proc) {
 	buffer_copy_string_len(b, CONST_STR_LEN("fastcgi.backend."));
@@ -824,6 +826,7 @@ FREE_FUNC(mod_fastcgi_free) {
 	return HANDLER_GO_ON;
 }
 
+#ifdef HAVE_FORK
 static int env_add(char_array *env, const char *key, size_t key_len, const char *val, size_t val_len) {
 	char *dst;
 	size_t i;
@@ -913,6 +916,7 @@ static int parse_binpath(char_array *env, buffer *b) {
 
 	return 0;
 }
+#endif /* HAVE_FORK */
 
 #if !defined(HAVE_FORK)
 static int fcgi_spawn_connection(server *srv,

src/mod_rrdtool.c

@@ -79,12 +79,11 @@ FREE_FUNC(mod_rrd_free) {
 	free(p->config_storage);
 
 	if (p->rrdtool_pid) {
-		int status;
 		close(p->read_fd);
 		close(p->write_fd);
 #ifdef HAVE_FORK
 		/* collect status */
-		while (-1 == waitpid(p->rrdtool_pid, &status, 0) && errno == EINTR) ;
+		while (-1 == waitpid(p->rrdtool_pid, NULL, 0) && errno == EINTR) ;
 #endif
 	}
 
@@ -181,6 +180,8 @@ static int mod_rrd_create_pipe(server *srv, plugin_data *p) {
 
 	return 0;
 #else
+	UNUSED(srv);
+	UNUSED(p);
 	return -1;
 #endif
 }

src/mod_scgi.c

@@ -327,6 +327,7 @@ static handler_t scgi_handle_fdevent(server *srv, void *ctx, int revents);
 
 int scgi_proclist_sort_down(server *srv, scgi_extension_host *host, scgi_proc *proc);
 
+#ifdef HAVE_FORK
 static void reset_signals(void) {
 #ifdef SIGTTOU
 	signal(SIGTTOU, SIG_DFL);
@@ -341,6 +342,7 @@ static void reset_signals(void) {
 	signal(SIGPIPE, SIG_DFL);
 	signal(SIGUSR1, SIG_DFL);
 }
+#endif /* HAVE_FORK */
 
 static handler_ctx * handler_ctx_init(void) {
 	handler_ctx * hctx;
@@ -647,6 +649,7 @@ FREE_FUNC(mod_scgi_free) {
 	return HANDLER_GO_ON;
 }
 
+#ifdef HAVE_FORK
 static int env_add(char_array *env, const char *key, size_t key_len, const char *val, size_t val_len) {
 	char *dst;
 	size_t i;
@@ -683,6 +686,7 @@ static int env_add(char_array *env, const char *key, size_t key_len, const char
 
 	return 0;
 }
+#endif /* HAVE_FORK */
 
 #if !defined(HAVE_FORK)
 static int scgi_spawn_connection(server *srv,

src/mod_webdav.c

@@ -14,6 +14,7 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>

src/server.c

@@ -837,7 +837,9 @@ static int server_main (server * const srv, int argc, char **argv) {
 	int test_config = 0;
 	int i_am_root = 0;
 	int o;
+#ifdef HAVE_FORK
 	int num_childs = 0;
+#endif
 	int fd;
 	size_t i;
 	time_t idle_limit = 0, last_active_ts = time(NULL);

src/stat_cache.c

@@ -107,10 +107,13 @@ typedef struct stat_cache {
 	buffer *hash_key;  /* temp-store for the hash-key */
 } stat_cache;
 
+#ifdef HAVE_FAM_H
 static handler_t stat_cache_handle_fdevent(server *srv, void *_fce, int revent);
+#endif
 
 stat_cache *stat_cache_init(server *srv) {
 	stat_cache *sc = NULL;
+	UNUSED(srv);
 
 	sc = calloc(1, sizeof(*sc));
 	force_assert(NULL != sc);