Fix libffi build

libffi/libffi#764

linux/libraries/libffi.php

@@ -38,7 +38,7 @@ class Liblibffi extends Library
 
 Name: libffi
 Description: Library supporting Foreign Function Interfaces
-Version: 3.4.2
+Version: 3.4.4
 Libs: -L${toolexeclibdir} -lffi
 Cflags: -I${includedir}
 EOF
@@ -68,6 +68,59 @@ protected function build(): void
  throw new Exception("unsupported libc: {$this->config->libc->name}");
  }
 
+ // https://github.com/libffi/libffi/pull/764
+ $patch = <<<'PATCH'
+ From cbfb9b436ab13e4b4aba867d061e11d7f89a351c Mon Sep 17 00:00:00 2001
+ From: serge-sans-paille <sguelton@mozilla.com>
+ Date: Wed, 1 Feb 2023 18:09:25 +0100
+ Subject: [PATCH] Forward declare open_temp_exec_file
+
+ It's defined in closures.c and used in tramp.c.
+ Also declare it as an hidden symbol, as it should be.
+ ---
+ include/ffi_common.h | 4 ++++
+ src/tramp.c | 4 ++++
+ 2 files changed, 8 insertions(+)
+
+ diff --git a/include/ffi_common.h b/include/ffi_common.h
+ index 2bd31b03d..c53a79493 100644
+ --- a/include/ffi_common.h
+ +++ b/include/ffi_common.h
+ @@ -128,6 +128,10 @@ void *ffi_data_to_code_pointer (void *data) FFI_HIDDEN;
+ static trampoline. */
+ int ffi_tramp_is_present (void *closure) FFI_HIDDEN;
+
+ +/* Return a file descriptor of a temporary zero-sized file in a
+ + writable and executable filesystem. */
+ +int open_temp_exec_file(void) FFI_HIDDEN;
+ +
+ /* Extended cif, used in callback from assembly routine */
+ typedef struct
+ {
+ diff --git a/src/tramp.c b/src/tramp.c
+ index b9d273a1a..c3f4c9933 100644
+ --- a/src/tramp.c
+ +++ b/src/tramp.c
+ @@ -39,6 +39,10 @@
+ #ifdef __linux__
+ #define _GNU_SOURCE 1
+ #endif
+ +
+ +#include <ffi.h>
+ +#include <ffi_common.h>
+ +
+ #include <stdio.h>
+ #include <unistd.h>
+ #include <stdlib.h>
+ PATCH;
+ file_put_contents("{$this->sourceDir}/764.patch", $patch);
+ passthru(
+ "cd {$this->sourceDir} && " .
+ "patch -p1 < 764.patch",
+ $ret
+ );
+
+
  passthru(
  $this->config->setX . ' && ' .
  "cd {$this->sourceDir} && " .