glfw: reduce compilation units to bring iteration time down to ~90ms

This consistently shaves off about 40ms (~130ms -> ~90ms, 30% reduction) from build times when iterating.

On Windows, I suspect the result will be much greater due to slow filesystem perf there and the fact
that this reduces the # of files read.

This was originally brought to my attention as a possibility by @meshula in hexops/dawn#2, the way this
works is by reducing compilation units so that C headers only need to be read/parsed/interpreted once
rather than once per individual C source file we are compiling.

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

glfw/src/Window.zig

@@ -293,7 +293,6 @@ pub const Hints = struct {
                 else => unreachable,
             };
         }
-
     }
 };
 

glfw/src/sources_all.c

@@ -0,0 +1,9 @@
+// General sources
+#include "monitor.c"
+#include "init.c"
+#include "vulkan.c"
+#include "input.c"
+#include "osmesa_context.c"
+#include "egl_context.c"
+#include "context.c"
+#include "window.c"

glfw/src/sources_linux.c

@@ -0,0 +1,6 @@
+#include "sources_all.c"
+
+// General Linux-like sources
+#include "posix_time.c"
+#include "posix_thread.c"
+#include "linux_joystick.c"

glfw/src/sources_linux_wayland.c

@@ -0,0 +1,4 @@
+// General Linux-like sources
+#include "wl_monitor.c"
+#include "wl_window.c"
+#include "wl_init.c"

glfw/src/sources_linux_x11.c

@@ -0,0 +1,6 @@
+// General Linux-like sources
+#include "x11_init.c"
+#include "x11_window.c"
+#include "x11_monitor.c"
+#include "xkb_unicode.c"
+#include "glx_context.c"

glfw/src/sources_macos.c

@@ -0,0 +1,5 @@
+#include "sources_all.c"
+
+// MacOS-specific sources
+#include "cocoa_time.c"
+#include "posix_thread.c"

glfw/src/sources_macos.m

@@ -0,0 +1,6 @@
+// MacOS-specific sources
+#include "cocoa_joystick.m"
+#include "cocoa_init.m"
+#include "cocoa_window.m"
+#include "cocoa_monitor.m"
+#include "nsgl_context.m"

glfw/src/sources_windows.c

@@ -0,0 +1,10 @@
+#include "sources_all.c"
+
+// Windows-specific sources
+#include "win32_thread.c"
+#include "wgl_context.c"
+#include "win32_init.c"
+#include "win32_monitor.c"
+#include "win32_time.c"
+#include "win32_joystick.c"
+#include "win32_window.c"