diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9ed45830..edf486ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,7 +66,10 @@ find_package(GdkPixbuf)
 find_package(PAM)
 
 find_package(LibInput REQUIRED)
-find_package(Libcap REQUIRED)
+
+if (CMAKE_SYSTEM_NAME STREQUAL Linux)
+	find_package(Libcap REQUIRED)
+endif (CMAKE_SYSTEM_NAME STREQUAL Linux)
 
 if (CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
 	find_package(EpollShim REQUIRED)
diff --git a/common/log.c b/common/log.c
index 61937495..af1bdc3f 100644
--- a/common/log.c
+++ b/common/log.c
@@ -1,4 +1,4 @@
-#define _POSIX_C_SOURCE 1
+#define _POSIX_C_SOURCE 199506L
 #include <errno.h>
 #include <libgen.h>
 #include <signal.h>
diff --git a/common/stringop.c b/common/stringop.c
index 99e9636d..4a37543d 100644
--- a/common/stringop.c
+++ b/common/stringop.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/common/util.c b/common/util.c
index 34bb5ec1..d6369853 100644
--- a/common/util.c
+++ b/common/util.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
diff --git a/sway/border.c b/sway/border.c
index 10ad92c2..df0022ce 100644
--- a/sway/border.c
+++ b/sway/border.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <wlc/wlc-render.h>
 #include <cairo/cairo.h>
 #include <pango/pangocairo.h>
diff --git a/sway/commands.c b/sway/commands.c
index 509fd1a8..34218491 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <xkbcommon/xkbcommon.h>
 #include <xkbcommon/xkbcommon-names.h>
 #include <wlc/wlc.h>
diff --git a/sway/commands/assign.c b/sway/commands/assign.c
index ec262bb8..c3b03bbc 100644
--- a/sway/commands/assign.c
+++ b/sway/commands/assign.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <stdio.h>
 #include <string.h>
 #include "sway/commands.h"
@@ -55,4 +55,3 @@ struct cmd_results *cmd_assign(int argc, char **argv) {
 	}
 	return error ? error : cmd_results_new(CMD_SUCCESS, NULL, NULL);
 }
-
diff --git a/sway/commands/set.c b/sway/commands/set.c
index 1d6bce04..e3d08dd3 100644
--- a/sway/commands/set.c
+++ b/sway/commands/set.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <stdio.h>
 #include <string.h>
 #include <strings.h>
diff --git a/sway/config.c b/sway/config.c
index 19b1882f..85823953 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -1,5 +1,5 @@
 #define _POSIX_C_SOURCE 200809L
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <stdio.h>
 #include <stdbool.h>
 #include <stdlib.h>
@@ -527,7 +527,7 @@ bool load_main_config(const char *file, bool is_active) {
 	list_add(config->config_chain, path);
 
 	config->reading = true;
-	
+
 	// Read security configs
 	bool success = true;
 	DIR *dir = opendir(SYSCONFDIR "/sway/security.d");
diff --git a/sway/criteria.c b/sway/criteria.c
index 1ea8311e..04683f66 100644
--- a/sway/criteria.c
+++ b/sway/criteria.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/sway/input.c b/sway/input.c
index 4f1ef760..6263f79f 100644
--- a/sway/input.c
+++ b/sway/input.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <ctype.h>
 #include <float.h>
 #include <limits.h>
@@ -60,7 +60,7 @@ char *libinput_dev_unique_id(struct libinput_device *device) {
 	}
 
 	const char *fmt = "%d:%d:%s";
-	snprintf(identifier, len, fmt, vendor, product, name); 
+	snprintf(identifier, len, fmt, vendor, product, name);
 	free(name);
 	return identifier;
 }
diff --git a/sway/main.c b/sway/main.c
index 819788b1..82375e0b 100644
--- a/sway/main.c
+++ b/sway/main.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #define _POSIX_C_SOURCE 200112L
 #include <stdio.h>
 #include <stdlib.h>
@@ -433,4 +433,3 @@ int main(int argc, char **argv) {
 
 	return exit_value;
 }
-
diff --git a/sway/security.c b/sway/security.c
index 8eab6126..92de06c1 100644
--- a/sway/security.c
+++ b/sway/security.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <string.h>
diff --git a/swaygrab/json.c b/swaygrab/json.c
index 563b8ba3..80dae299 100644
--- a/swaygrab/json.c
+++ b/swaygrab/json.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #include <string.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/swaygrab/main.c b/swaygrab/main.c
index f901d318..413de1fa 100644
--- a/swaygrab/main.c
+++ b/swaygrab/main.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
 #define _POSIX_C_SOURCE 199309L
 #include <stdio.h>
 #include <stdbool.h>