Fix building with compilers that dont support __has_include

glfw/backend_utils.h

@@ -29,10 +29,15 @@
 #include <unistd.h>
 #include <stdbool.h>
 
+#ifdef __has_include
 #if __has_include(<sys/eventfd.h>)
 #define HAS_EVENT_FD
 #include <sys/eventfd.h>
 #endif
+#else
+#define HAS_EVENT_FD
+#include <sys/eventfd.h>
+#endif
 
 typedef unsigned long long id_type;
 typedef void(*watch_callback_func)(int, int, void*);

glfw/wl_init.c

@@ -41,11 +41,15 @@
 #include <fcntl.h>
 #include <wayland-client.h>
 // Needed for the BTN_* defines
+#ifdef __has_include
 #if __has_include(<linux/input.h>)
 #include <linux/input.h>
 #elif __has_include(<dev/evdev/input.h>)
 #include <dev/evdev/input.h>
 #endif
+#else
+#include <linux/input.h>
+#endif
 
 
 static inline int min(int n1, int n2)

kitty/loop-utils.h

@@ -10,6 +10,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 
+#ifdef __has_include
 #if __has_include(<sys/signalfd.h>)
 #define HAS_SIGNAL_FD
 #include <sys/signalfd.h>
@@ -19,6 +20,12 @@
 #define HAS_EVENT_FD
 #include <sys/eventfd.h>
 #endif
+#else
+#define HAS_SIGNAL_FD
+#include <sys/signalfd.h>
+#define HAS_EVENT_FD
+#include <sys/eventfd.h>
+#endif
 
 typedef struct {
 #ifndef HAS_EVENT_FD