libffi: Fix allocation of non-executable memory for functions.

Fixes #5109.

dev-libs/libffi/libffi-3.2.1.recipe

@@ -7,7 +7,7 @@ plugins."
 HOMEPAGE="http://sourceware.org/libffi"
 COPYRIGHT="1996-2013 Anthony Green, Red Hat, Inc and others."
 LICENSE="MIT"
-REVISION="5"
+REVISION="6"
 SOURCE_URI="ftp://sourceware.org/pub/libffi/libffi-$portVersion.tar.gz"
 CHECKSUM_SHA256="d06ebb8e1d9a22d19e38d63fdb83954253f39bedc5d46232a05645685722ca37"
 PATCHES="libffi-$portVersion.patchset"

dev-libs/libffi/patches/libffi-3.2.1.patchset

@@ -20,3 +20,29 @@ index 650ca69..02a1913 100644
 -- 
 1.8.3.4
 
+
+From 46ac95d3636b845de417cc97c426b98c89d9ea54 Mon Sep 17 00:00:00 2001
+From: Michael Lotz <mmlr@mlotz.ch>
+Date: Fri, 12 Jun 2020 13:14:57 +0000
+Subject: Mark Haiku as needing PROT_WRITE | PROTO_EXEC for allocations.
+
+It uses the heap as a fallback, but its areas are marked non-executable
+in Haiku so function calls into there will segfault with a permission
+denied error.
+
+diff --git a/configure b/configure
+index c6da467..d856e1a 100755
+--- a/configure
++++ b/configure
+@@ -18530,7 +18530,7 @@ case "$target" in
+ $as_echo "#define FFI_EXEC_TRAMPOLINE_TABLE 1" >>confdefs.h
+ 
+      ;;
+-     *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
++     *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris* | *-*-haiku*)
+ 
+ $as_echo "#define FFI_MMAP_EXEC_WRIT 1" >>confdefs.h
+ 
+-- 
+2.26.0
+