anv: Check if memfd_create is already defined.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103909
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

configure.ac

@@ -849,6 +849,7 @@ AC_CHECK_HEADER([sys/sysctl.h], [DEFINES="$DEFINES -DHAVE_SYS_SYSCTL_H"])
 AC_CHECK_FUNC([strtof], [DEFINES="$DEFINES -DHAVE_STRTOF"])
 AC_CHECK_FUNC([mkostemp], [DEFINES="$DEFINES -DHAVE_MKOSTEMP"])
 AC_CHECK_FUNC([timespec_get], [DEFINES="$DEFINES -DHAVE_TIMESPEC_GET"])
+AC_CHECK_FUNC([memfd_create], [DEFINES="$DEFINES -DHAVE_MEMFD_CREATE"])
 
 AC_MSG_CHECKING([whether strtod has locale support])
 AC_LINK_IFELSE([AC_LANG_SOURCE([[

meson.build

@@ -617,7 +617,7 @@ foreach h : ['xlocale.h', 'sys/sysctl.h', 'linux/futex.h']
   endif
 endforeach
 
-foreach f : ['strtof', 'mkostemp', 'posix_memalign', 'timespec_get']
+foreach f : ['strtof', 'mkostemp', 'posix_memalign', 'timespec_get', 'memfd_create']
   if cc.has_function(f)
     pre_args += '-DHAVE_@0@'.format(f.to_upper())
   endif

src/intel/vulkan/anv_allocator.c

@@ -109,11 +109,13 @@ struct anv_mmap_cleanup {
 
 #define ANV_MMAP_CLEANUP_INIT ((struct anv_mmap_cleanup){0})
 
+#ifndef HAVE_MEMFD_CREATE
 static inline int
 memfd_create(const char *name, unsigned int flags)
 {
    return syscall(SYS_memfd_create, name, flags);
 }
+#endif
 
 static inline uint32_t
 ilog2_round_up(uint32_t value)

src/intel/vulkan/anv_gem_stubs.c

@@ -27,11 +27,13 @@
 
 #include "anv_private.h"
 
+#ifndef HAVE_MEMFD_CREATE
 static inline int
 memfd_create(const char *name, unsigned int flags)
 {
    return syscall(SYS_memfd_create, name, flags);
 }
+#endif
 
 uint32_t
 anv_gem_create(struct anv_device *device, uint64_t size)