From fa3aab97687bee086005f8c6e40a54f99cdfa836 Mon Sep 17 00:00:00 2001
From: q3cpma <hadrien.lacour@posteo.net>
Date: Thu, 30 Nov 2017 16:53:55 +0100
Subject: [PATCH] Fixes compilation on FreeBSD (and hopefully on other POSIX
 platforms)

---
 gfx/common/x11_common.c | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/gfx/common/x11_common.c b/gfx/common/x11_common.c
index 20eebf8da3..5189cb3792 100644
--- a/gfx/common/x11_common.c
+++ b/gfx/common/x11_common.c
@@ -21,6 +21,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
+#include <errno.h>
 #include <unistd.h>
 
 #include <X11/Xatom.h>
@@ -159,19 +160,27 @@ static void x11_set_window_class(Display *dpy, Window win)
 
 static void x11_set_window_pid(Display *dpy, Window win)
 {
+    long scret;
+    char *hostname;
     pid_t pid = getpid();
-    char hostname[HOST_NAME_MAX + 1];
 
-	XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_PID", False),
-		XA_CARDINAL, 32, PropModeReplace, (unsigned char *)&pid, 1);
+    XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_PID", False),
+        XA_CARDINAL, 32, PropModeReplace, (unsigned char *)&pid, 1);
 
-	if(gethostname(hostname, HOST_NAME_MAX + 1) == -1)
-		RARCH_WARN("Failed to get hostname.\n");
-	else
-	{
-		XChangeProperty(dpy, win, XA_WM_CLIENT_MACHINE, XA_STRING, 8,
-			PropModeReplace, (unsigned char *)hostname, strlen(hostname));
-	}
+    errno = 0;
+    if((scret = sysconf(_SC_HOST_NAME_MAX)) == -1 && errno)
+        return;
+    if((hostname = malloc(scret + 1)) == NULL)
+        return;
+
+    if(gethostname(hostname, HOST_NAME_MAX + 1) == -1)
+        RARCH_WARN("Failed to get hostname.\n");
+    else
+    {
+        XChangeProperty(dpy, win, XA_WM_CLIENT_MACHINE, XA_STRING, 8,
+            PropModeReplace, (unsigned char *)hostname, strlen(hostname));
+    }
+    free(hostname);
 }
 
 void x11_set_window_attr(Display *dpy, Window win)