Fix warnings introduced by prior commit

include/stringop.h

@@ -2,6 +2,11 @@
 #define _SWAY_STRINGOP_H
 #include "list.h"
 
+#if !HAVE_DECL_SETENV
+// Not sure why we need to provide this
+extern int setenv(const char *, const char *, int);
+#endif
+
 // array of whitespace characters to use for delims
 extern const char *whitespace;
 

sway/commands.c

@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <string.h>
+#include <strings.h>
 #include <unistd.h>
 #include <ctype.h>
 #include <sys/types.h>

sway/container.c

@@ -1,7 +1,9 @@
 #include <stdlib.h>
 #include <stdbool.h>
 #include <strings.h>
+#include <string.h>
 #include "config.h"
+#include "stringop.h"
 #include "container.h"
 #include "workspace.h"
 #include "focus.h"

sway/log.c

@@ -80,9 +80,7 @@ void sway_log_errno(log_importance_t verbosity, char* format, ...) {
 		va_end(args);
 
 		fprintf(stderr, ": ");
-		char error[256];
-		strerror_r(errno, error, sizeof(error));
-		fprintf(stderr, "%s", error);
+		fprintf(stderr, "%s", strerror(errno));
 
 		if (colored && isatty(STDERR_FILENO)) {
 			fprintf(stderr, "\x1B[0m");

sway/main.c

@@ -7,6 +7,7 @@
 #include <signal.h>
 #include <getopt.h>
 #include "layout.h"
+#include "stringop.h"
 #include "config.h"
 #include "log.h"
 #include "readline.h"

sway/stringop.c

@@ -311,3 +311,11 @@ char *join_list(list_t *list, char *separator) {
 
 	return res;
 }
+
+char *strdup(const char *str) {
+	char *dup = malloc(strlen(str) + 1);
+	if (dup) {
+		strcpy(dup, str);
+	}
+	return dup;
+}

sway/workspace.c

@@ -2,6 +2,7 @@
 #include <stdbool.h>
 #include <wlc/wlc.h>
 #include <string.h>
+#include <strings.h>
 #include "workspace.h"
 #include "layout.h"
 #include "list.h"