Just copy-paste the initial definition to avoid recursion.

We need -std=c99 to be passed through to the build process.

 They have been flawed ever since nxagent came up, as they were Xfree
 (non-capital f) always, but should have been XFree (capital F, defined
 in Xlibint.h and part of libNX_X11).
 .
 Probably this all should be free() all over the code (bearing in mind,
 that XFree() returns int, not void. But still...

 Fixes ArcticaProject/nx-libs#553.

 Picked from this X.org commit:

 commit b0dd6be2c8703f7062d45ac9fd646550c7d54e3b
 Author: Jamey Sharp <jamey@minilop.net>
 Date:   Thu Oct 8 13:38:44 2009 +1100

    Cast small-int values through intptr_t when passed as pointers

    On 64-bit systems, int and pointers don't have the same size, so GCC gives
    warnings about casts between int and pointer types. However, in the cases
    covered by this patch, it's always a value that fits in int being stored
    temporarily as a pointer and then converted back later, which is safe.
    Casting through the pointer-sized integer type intptr_t convinces the
    compiler that this is OK.
Signed-off-by: Jamey Sharp <jamey@minilop.net>
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
 (Only appropriate location for backporting: Xserver/GL/glx/glxcmds.c).

 Xrm.c: In function 'PutEntry':
 Xrm.c:900:15: warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses]
     !quarks[2] != table->leaf)
               ^~

 commit 63ccaec2c39f4b5742383472c951ee2cd35c9e14
 Author: Adam Jackson <ajax@redhat.com>
 Date:   Tue Oct 19 11:59:23 2010 -0400

    render2.c: In function ‘__glXDisp_Map2d’:
    render2.c:127: warning: ‘u1’ may be used uninitialized in this function
    render2.c: In function ‘__glXDisp_Map1d’:
    render2.c:90: warning: ‘u1’ may be used uninitialized in this function

    Remove unnecessary test, and change memcpy to memmove as all users were
    doing overlapping copies.
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

 glxfb.c: In function '__glXFBMemSwapBuffers':
 glxfb.c:117:5: warning: pointer targets in passing argument 10 of 'pGC->ops->PutImage' differ in signedness [-Wpointer-sign]
      buf);
      ^~~
 glxfb.c:117:5: note: expected 'char *' but argument is of type 'GLubyte * {aka unsigned char *}'

 Events.c: In function 'nxagentDumpInputDevicesState':
 Events.c:4662:58: warning: format '%p' expects argument of type 'void *', but argument 3 has type 'DeviceIntPtr {aka struct _DeviceIntRec *}' [-Wformat=]
    fprintf(stderr, "\nKeyboard device state: \n\tdevice [%p]\n\tlast grab time [%lu]"
                                                           ^
 Events.c:4662:82: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'CARD32 {aka unsigned int}' [-Wformat=]
    fprintf(stderr, "\nKeyboard device state: \n\tdevice [%p]\n\tlast grab time [%lu]"
                                                                                  ^
 Events.c:4662:19: warning: format '%p' expects argument of type 'void *', but argument 7 has type 'GrabPtr {aka struct _GrabRec *}' [-Wformat=]
    fprintf(stderr, "\nKeyboard device state: \n\tdevice [%p]\n\tlast grab time [%lu]"
                    ^
 Events.c:4675:66: warning: format '%p' expects argument of type 'void *', but argument 3 has type 'WindowPtr {aka struct _Window *}' [-Wformat=]
      fprintf(stderr, "\nKeyboard grab state: \n\twindow pointer [%p]"
                                                                   ^
 Events.c:4689:59: warning: format '%p' expects argument of type 'void *', but argument 3 has type 'DeviceIntPtr {aka struct _DeviceIntRec *}' [-Wformat=]
        fprintf(stderr, "\nPassive grab state: \n\tdevice [%p]\n\towner events flag [%s]"
                                                            ^
 Events.c:4689:23: warning: format '%lx' expects argument of type 'long unsigned int', but argument 10 has type 'Mask {aka unsigned int}' [-Wformat=]
        fprintf(stderr, "\nPassive grab state: \n\tdevice [%p]\n\towner events flag [%s]"
                        ^
 Events.c:4722:57: warning: format '%p' expects argument of type 'void *', but argument 3 has type 'DeviceIntPtr {aka struct _DeviceIntRec *}' [-Wformat=]
    fprintf(stderr, "\nPointer device state: \n\tdevice [%p]\n\tlast grab time [%lu]"
                                                          ^
 Events.c:4722:81: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'CARD32 {aka unsigned int}' [-Wformat=]
    fprintf(stderr, "\nPointer device state: \n\tdevice [%p]\n\tlast grab time [%lu]"
                                                                                  ^
 Events.c:4722:19: warning: format '%p' expects argument of type 'void *', but argument 7 has type 'GrabPtr {aka struct _GrabRec *}' [-Wformat=]
    fprintf(stderr, "\nPointer device state: \n\tdevice [%p]\n\tlast grab time [%lu]"
                    ^
 Events.c:4735:65: warning: format '%p' expects argument of type 'void *', but argument 3 has type 'WindowPtr {aka struct _Window *}' [-Wformat=]
      fprintf(stderr, "\nPointer grab state: \n\twindow pointer [%p]"
                                                                  ^
 Events.c:4750:61: warning: format '%p' expects argument of type 'void *', but argument 3 has type 'DeviceIntPtr {aka struct _DeviceIntRec *}' [-Wformat=]
          fprintf(stderr, "\nPassive grab state: \n\tdevice [%p]\n\towner events flag [%s]"
                                                              ^
 Events.c:4750:25: warning: format '%lx' expects argument of type 'long unsigned int', but argument 10 has type 'Mask {aka unsigned int}' [-Wformat=]
          fprintf(stderr, "\nPassive grab state: \n\tdevice [%p]\n\towner events flag [%s]"
                          ^

 NXxvdisp.c: In function 'ProcXvDispatch':
 NXxvdisp.c:96:9: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
          else
          ^~~~
 NXxvdisp.c:99:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
              break;
              ^~~~~
 NXxvdisp.c:104:9: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
          else
          ^~~~
 NXxvdisp.c:107:10: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
           break;
           ^~~~~
 NXxvdisp.c:118:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   else
   ^~~~
 NXxvdisp.c:121:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
              break;
              ^~~~~
 NXxvdisp.c:126:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   else
   ^~~~
 NXxvdisp.c:129:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
              break;
              ^~~~~
 NXxvdisp.c:137:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   else
   ^~~~
 NXxvdisp.c:140:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
              break;
              ^~~~~
 NXxvdisp.c:146:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   else
   ^~~~
 NXxvdisp.c:149:6: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
       break;
       ^~~~~

 NXdispatch.c: In function 'Dispatch':
 NXdispatch.c:309:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if (!(dispatchException & DE_TERMINATE))
     ^~
 NXdispatch.c:312:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
       while (!dispatchException)
       ^~~~~

 chgfctl.c: In function 'ChangeKbdFeedback':
 chgfctl.c:359:6: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
       else
       ^~~~
 chgfctl.c:361:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
    kctrl.autoRepeats[inx] =
    ^~~~~

nxagentInitKeyboardState -> nxagentInitXkbKeyboardState
nxagentHandleKeyboardEvent -> nxagentHandleXkbKeyboardStateEvent

If xorg upstream xkb gets extended one day the previous code would not
block new xkb calls even if they would change keyboard settings. So
only act on the currently known calls and throw an error for all
unknown calls.

Fixes ArcticaProject/nx-libs#257

This helps understanding the intention of the following code.

this ensures that randr updates its private structures

If -rrxinerama was specified xrandr handling was broken. Adding/using
a custom resolution via xrandr was not working anymore.

Fixes ArcticaProject/nx-libs#530

Code was here twice and could be simply merged.

Xserver/os/xprintf.c: Drop NoMachine's own implementation of Xvasprintf(). Use stock implementation instead.

 * Reason from NoMachine's NX CHANGELOG for having its own implementation
   of Xvasprintf() (from around nxagent 3.3.0):

    - Fixed TR06G02225. The implementation of Xvprintf() has been reviewed
      to work on more platforms. Previous implementation caused a failure
      in the build of keyboard map on some platform like Solaris 8 and 9.
    - Fixed TR03G02198. Reimplemented Xvprintf() in Xserver/os to handle
      the case in which vsnprintf returned -1.

 * Reason for removing it again:

    - Fixes segfaults in SetDefaultFontPath when launching nxagent.
    - All locations in Xserver/** using the code check for return value
      of -1.
    - Solaris 8 and 9 are beyond of our support scope.
    - Keep more in sync with X.org.
    - Good moment to drop more GPL-2 code from Xserver's code base.

nx-X11/programs/Xserver/os/xprintf.c: remove doubly-defined Xscnprintf function, add missing header includes.

Fix up for 1e3a9748, which has been
faulty in this regard.

Backported from X.org:

commit 5c2e2a164d615ab06be28a663734e782614b5cc7
Author: Daniel Kurtz <djkurtz@chromium.org>
Date:   Wed Apr 18 09:51:51 2012 +0000

    os/xprintf: add Xvscnprintf and Xscnprintf

    Normal snprintf() usually returns the number of bytes that would have been
    written into a buffer had the buffer been long enough.

    The scnprintf() variants return the actual number of bytes written,
    excluding the trailing '\0'.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Backported-to-NX-by: Mihai Moldovan <ionic@ionic.de>

Backported from X.org:

commit 1324b0ca9f8a7fdaf03b374c75eb3c9df407c2f1
Author: Colin Harrison <colin.harrison@virgin.net>
Date:   Fri Dec 10 00:08:24 2010 +0000

    Typo in xserver Xvasprintf()

    I needed this patch in the wrapper around vsnprintf() in os/xprintf.c
    (MinGW for Windows build) to correct various crashes.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Backported-to-NX-by: Mihai Moldovan <ionic@ionic.de>