Fix libffi 3.2.1 on 64-bit

libffi was broken on 64-bit, any c function returning a struct > 8 bytes and not a multiple of 16 will cause a segfault. This is because between 3.1 and 3.2 somebody changed (size != 1 || size != 2 || size != 4 || size != 8) into (size & (1 | 2 | 4 | 8) == 0), which is not the same.

patches/libffi/fix_return_size.patch

@@ -0,0 +1,50 @@
+--- src/libffi-3.2.1/src/x86/ffi.c.orig	2016-07-20 21:24:49.000771900 +0100
++++ src/libffi-3.2.1/src/x86/ffi.c	2016-07-20 21:25:09.918786700 +0100
+@@ -65,7 +65,8 @@
+   if ((ecif->cif->flags == FFI_TYPE_STRUCT
+        || ecif->cif->flags == FFI_TYPE_MS_STRUCT)
+ #ifdef X86_WIN64
+-      && ((ecif->cif->rtype->size & (1 | 2 | 4 | 8)) == 0)
++      && (ecif->cif->rtype->size != 1 && ecif->cif->rtype->size != 2
++          && ecif->cif->rtype->size != 4 && ecif->cif->rtype->size != 8)
+ #endif
+       )
+     {
+@@ -108,7 +109,7 @@
+ #ifdef X86_WIN64
+       if (z > FFI_SIZEOF_ARG
+           || ((*p_arg)->type == FFI_TYPE_STRUCT
+-              && (z & (1 | 2 | 4 | 8)) == 0)
++              && (z != 1 && z != 2 && z != 4 && z != 8))
+ #if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
+           || ((*p_arg)->type == FFI_TYPE_LONGDOUBLE)
+ #endif
+@@ -360,7 +361,8 @@
+ #ifdef X86_WIN64
+   if (rvalue == NULL
+       && cif->flags == FFI_TYPE_STRUCT
+-      && ((cif->rtype->size & (1 | 2 | 4 | 8)) == 0))
++      && cif->rtype->size != 1 && cif->rtype->size != 2
++      && cif->rtype->size != 4 && cif->rtype->size != 8)
+     {
+       ecif.rvalue = alloca((cif->rtype->size + 0xF) & ~0xF);
+     }
+@@ -545,7 +547,8 @@
+   if ((cif->flags == FFI_TYPE_STRUCT
+        || cif->flags == FFI_TYPE_MS_STRUCT)
+ #ifdef X86_WIN64
+-      && ((cif->rtype->size & (1 | 2 | 4 | 8)) == 0)
++      && ((cif->rtype->size != 1 && cif->rtype->size != 2
++           && cif->rtype->size != 4 && cif->rtype->size != 8))
+ #endif
+       )
+     {
+@@ -608,7 +611,7 @@
+ #ifdef X86_WIN64
+       if (z > FFI_SIZEOF_ARG
+           || ((*p_arg)->type == FFI_TYPE_STRUCT
+-              && (z & (1 | 2 | 4 | 8)) == 0)
++              && (z != 1 && z != 2 && z != 4 && z != 8))
+ #if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
+           || ((*p_arg)->type == FFI_TYPE_LONGDOUBLE)
+ #endif

scripts/libffi.sh

@@ -47,7 +47,9 @@ PKG_PRIORITY=extra
 
 #
 
-PKG_PATCHES=()
+PKG_PATCHES=(
+	libffi/fix_return_size.patch
+)
 
 #