media-libs/kvazaar: fix AVX2 flags on GCC

On older CPUS without support for popcnt or lzcnt compilation of
kvazaar fails due to these instructions being used by the AVX2
code but the relevant flags to support them not being set by
the Makefile.

Upstream fixed this in commit
99423a825027c862bbfd50e112a1846a013b01a7

Backport this patch so compilation works again on systems
without CPU support for these instructions.

Closes: https://bugs.gentoo.org/739776
Bug: https://github.com/ultravideo/kvazaar/pull/301
Signed-off-by: Francisco Blas (klondike) Izquierdo Riera <klondike@gentoo.org>
Signed-off-by: Sam James <sam@gentoo.org>

3 files changed, 42 insertions, 1 deletions

diff --git a/media-libs/kvazaar/files/kvazaar-2.0.0-fix-avx2-flags.patch b/media-libs/kvazaar/files/kvazaar-2.0.0-fix-avx2-flags.patch
new file mode 100644
index 000000000000..f2ae8ae44150
--- /dev/null
+++ b/media-libs/kvazaar/files/kvazaar-2.0.0-fix-avx2-flags.patch
@@ -0,0 +1,33 @@
+From 99423a825027c862bbfd50e112a1846a013b01a7 Mon Sep 17 00:00:00 2001
+From: "Francisco Blas (klondike) Izquierdo Riera" <klondike@klondike.es>
+Date: Tue, 4 Oct 2022 10:03:44 +0200
+Subject: [PATCH] Enable -mpopcnt and -mlzcnt on AVX2
+
+When -mpopcnt or -mlzcnt are explicitly enabled or disabled
+(when using -march=native for example), kvazaar builds fail
+on older CPUs without support for these flags (see
+https://github.com/ultravideo/kvazaar/issues/228 and
+https://bugs.gentoo.org/739776 ).
+
+Ensuring these flags are on as done with the rest of AVX2 flags
+solves the compilation issues, although it may be a better
+approach to provide a configuration option so that only the
+specific version matching the build system supported flags is
+created in such cases.
+---
+ src/Makefile.am | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/Makefile.am b/src/Makefile.am
+index 79880a98..c972c5be 100644
+--- a/src/Makefile.am
++++ b/src/Makefile.am
+@@ -226,7 +226,7 @@ endif #HAVE_PPC
+ if HAVE_X86
+ 
+ if HAVE_AVX2_GCC
+-libavx2_la_CFLAGS = -mavx2 -mbmi -mabm -mbmi2
++libavx2_la_CFLAGS = -mavx2 -mbmi -mabm -mpopcnt -mlzcnt -mbmi2
+ endif
+ if HAVE_AVX2_CLANG
+ libavx2_la_CFLAGS = -mavx2 -mbmi -mpopcnt -mlzcnt -mbmi2
diff --git a/media-libs/kvazaar/kvazaar-2.0.0.ebuild b/media-libs/kvazaar/kvazaar-2.0.0.ebuild
index 34ceb7d503f6..6ef96802243d 100644
--- a/media-libs/kvazaar/kvazaar-2.0.0.ebuild
+++ b/media-libs/kvazaar/kvazaar-2.0.0.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2021 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -35,6 +35,10 @@ DEPEND="${RDEPEND}
 	abi_x86_64? ( ${ASM_DEP} )
 "
 
+PATCHES=(
+	"${FILESDIR}/${P}-fix-avx2-flags.patch"
+)
+
 src_prepare() {
 	default
 	sed -e "/^dist_doc_DATA/s/COPYING //" -i Makefile.am || die
diff --git a/media-libs/kvazaar/kvazaar-2.1.0.ebuild b/media-libs/kvazaar/kvazaar-2.1.0.ebuild
index a7e7e1cd5a73..1d013a574e78 100644
--- a/media-libs/kvazaar/kvazaar-2.1.0.ebuild
+++ b/media-libs/kvazaar/kvazaar-2.1.0.ebuild
@@ -35,6 +35,10 @@ DEPEND="${RDEPEND}
 	abi_x86_64? ( ${ASM_DEP} )
 "
 
+PATCHES=(
+	"${FILESDIR}/${PN}-2.0.0-fix-avx2-flags.patch"
+)
+
 src_prepare() {
 	default
 	sed -e "/^dist_doc_DATA/s/COPYING //" -i Makefile.am || die