[build] check for preadv(), pwritev()

SConstruct

@@ -446,7 +446,9 @@ if 1:
 		'posix_fadvise',
 		'prctl',
 		'pread',
+		'preadv',
 		'pwrite',
+		'pwritev',
 		'select',
 		'send_file',
 		'sendfile',

configure.ac

@@ -1513,7 +1513,9 @@ AC_CHECK_FUNCS([\
   poll \
   port_create \
   pread \
+  preadv \
   pwrite \
+  pwritev \
   select \
   send_file \
   sendfile \

src/CMakeLists.txt

@@ -186,7 +186,9 @@ check_function_exists(poll HAVE_POLL)
 check_function_exists(port_create HAVE_PORT_CREATE)
 check_function_exists(prctl HAVE_PRCTL)
 check_function_exists(pread HAVE_PREAD)
+check_function_exists(preadv HAVE_PREADV)
 check_function_exists(pwrite HAVE_PWRITE)
+check_function_exists(pwritev HAVE_PWRITEV)
 check_function_exists(posix_fadvise HAVE_POSIX_FADVISE)
 check_function_exists(select HAVE_SELECT)
 check_function_exists(sendfile HAVE_SENDFILE)

src/config.h.cmake

@@ -140,7 +140,9 @@
 #cmakedefine  HAVE_PORT_CREATE
 #cmakedefine  HAVE_PRCTL
 #cmakedefine  HAVE_PREAD
+#cmakedefine  HAVE_PREADV
 #cmakedefine  HAVE_PWRITE
+#cmakedefine  HAVE_PWRITEV
 #cmakedefine  HAVE_POSIX_FADVISE
 #cmakedefine  HAVE_SELECT
 #cmakedefine  HAVE_SENDFILE

src/meson.build

@@ -140,7 +140,9 @@ conf_data.set('HAVE_PORT_CREATE', compiler.has_function('port_create', args: def
 conf_data.set('HAVE_POSIX_FADVISE', compiler.has_function('posix_fadvise', args: defs))
 conf_data.set('HAVE_PRCTL', compiler.has_function('prctl', args: defs))
 conf_data.set('HAVE_PREAD', compiler.has_function('pread', args: defs))
+conf_data.set('HAVE_PREADV', compiler.has_function('preadv', args: defs))
 conf_data.set('HAVE_PWRITE', compiler.has_function('pwrite', args: defs))
+conf_data.set('HAVE_PWRITEV', compiler.has_function('pwritev', args: defs))
 conf_data.set('HAVE_SELECT', compiler.has_function('select', args: defs))
 conf_data.set('HAVE_SENDFILE', compiler.has_function('sendfile', args: defs))
 conf_data.set('HAVE_SEND_FILE', compiler.has_function('send_file', args: defs))