[Buildroot] [PATCH v4 1/2] package/x11r7/xlib_libxshmfence: fix build on riscv32

[Thomas Devoogdt <thomas@devoogdt.com>]

In preparation to revert e39ad96136a8c340b3aea6b036024e28f14584f3,
and (partial) 26642e4cc09666110d5105e7867579a0e48cfa09.

xshmfence_futex.h: In function 'sys_futex':
xshmfence_futex.h:58:24: error: 'SYS_futex' undeclared (first use in this function); did you mean 'sys_futex'?
   58 |         return syscall(SYS_futex, addr1, op, val1, timeout, addr2, val3);
      |                        ^~~~~~~~~
      |                        sys_futex

Fixes:
 - https://gitlab.com/buildroot.org/buildroot/-/commit/e39ad96136a8c340b3aea6b036024e28f14584f3

Signed-off-by: Thomas Devoogdt <thomas@devoogdt.com>
---
v4: move xlib_libxshmfence to separate patch series
---
 ...tex.h-fix-build-on-32-bit-architectu.patch | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 package/x11r7/xlib_libxshmfence/0001-src-xshmfence_futex.h-fix-build-on-32-bit-architectu.patch

diff --git a/package/x11r7/xlib_libxshmfence/0001-src-xshmfence_futex.h-fix-build-on-32-bit-architectu.patch b/package/x11r7/xlib_libxshmfence/0001-src-xshmfence_futex.h-fix-build-on-32-bit-architectu.patch
new file mode 100644
index 0000000000..f4ef558615
--- /dev/null
+++ b/package/x11r7/xlib_libxshmfence/0001-src-xshmfence_futex.h-fix-build-on-32-bit-architectu.patch
@@ -0,0 +1,46 @@
+From 4fca45a71f08a5bebd12d39c85f49e0b0e4426bf Mon Sep 17 00:00:00 2001
+From: Thomas Devoogdt <thomas@devoogdt.com>
+Date: Fri, 5 Apr 2024 10:45:15 +0200
+Subject: [PATCH] src/xshmfence_futex.h: fix build on 32-bit architectures
+ using 64-bit time_t
+
+Fix the following build failure on 32-bit architectures using 64-bit
+time_t (e.g. riscv32):
+
+xshmfence_futex.h: In function 'sys_futex':
+xshmfence_futex.h:58:24: error: 'SYS_futex' undeclared (first use in this function); did you mean 'sys_futex'?
+   58 |         return syscall(SYS_futex, addr1, op, val1, timeout, addr2, val3);
+      |                        ^~~~~~~~~
+      |                        sys_futex
+
+Similar to:
+https://gitlab.freedesktop.org/mesa/mesa/-/commit/7d87478124061915582412ba410759afe863d679
+
+Fixes:
+https://gitlab.com/buildroot.org/buildroot/-/commit/e39ad96136a8c340b3aea6b036024e28f14584f3
+
+Signed-off-by: Thomas Devoogdt <thomas@devoogdt.com>
+Part-of: <https://gitlab.freedesktop.org/xorg/lib/libxshmfence/-/merge_requests/8>
+Upstream: https://gitlab.freedesktop.org/xorg/lib/libxshmfence/-/commit/4fca45a71f08a5bebd12d39c85f49e0b0e4426bf
+---
+ src/xshmfence_futex.h | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/src/xshmfence_futex.h b/src/xshmfence_futex.h
+index 673ac0e..4476038 100644
+--- a/src/xshmfence_futex.h
++++ b/src/xshmfence_futex.h
+@@ -53,6 +53,10 @@ static inline int futex_wait(int32_t *addr, int32_t value) {
+ #include <sys/time.h>
+ #include <sys/syscall.h>
+ 
++#ifndef SYS_futex
++#define SYS_futex SYS_futex_time64
++#endif
++
+ static inline long sys_futex(void *addr1, int op, int val1, struct timespec *timeout, void *addr2, int val3)
+ {
+ 	return syscall(SYS_futex, addr1, op, val1, timeout, addr2, val3);
+-- 
+2.34.1
+
-- 
2.34.1

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