dev-libs/boost: add boost.compute patch

Bug: https://bugs.gentoo.org/940042
Signed-off-by: David Seifert <soap@gentoo.org>

dev-libs/boost/boost-1.86.0-r1.ebuild

@@ -52,6 +52,10 @@ PATCHES=(
 	"${FILESDIR}"/${PN}-1.79.0-build-auto_index-tool.patch
 	"${FILESDIR}"/${PN}-1.85.0-bcp-filesystem.patch
 	"${FILESDIR}"/${PN}-1.85.0-python-numpy-2.patch
+
+	# backports
+	# https://github.com/boostorg/compute/issues/889
+	"${FILESDIR}"/${PN}-1.86.0-uuid-compute-backport.patch
 )
 
 create_user-config.jam() {

dev-libs/boost/files/boost-1.86.0-uuid-compute-backport.patch

@@ -0,0 +1,30 @@
+From 4ab28f5b879c8a2335b851f5338b9012f4466dd0 Mon Sep 17 00:00:00 2001
+From: sehe <github@sehe.nl>
+Date: Mon, 19 Aug 2024 17:42:31 +0200
+Subject: [PATCH] Update sha1.hpp for breaking interface change in Boost.UUID
+
+see https://github.com/boostorg/uuid/commit/0f843137a1a479797004f195ec615fdc6ac1c219
+---
+ boost/compute/detail/sha1.hpp | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/boost/compute/detail/sha1.hpp b/boost/compute/detail/sha1.hpp
+index 5afe5f9c4..24fde3cd1 100644
+--- a/boost/compute/detail/sha1.hpp
++++ b/boost/compute/detail/sha1.hpp
+@@ -37,12 +37,12 @@ class sha1 {
+         }
+ 
+         operator std::string() {
+-            unsigned int digest[5];
++            unsigned char digest[20];
+             h.get_digest(digest);
+ 
+             std::ostringstream buf;
+-            for(int i = 0; i < 5; ++i)
+-                buf << std::hex << std::setfill('0') << std::setw(8) << digest[i];
++            for(int i = 0; i < 20; ++i)
++                buf << std::hex << std::setfill('0') << std::setw(2) << static_cast<int>(digest[i]);
+ 
+             return buf.str();
+         }