community/openpgm: fix build with 32-bit mmx

Fix -Wimplicit-function-declaration error due to undefined
`_mm_cvtm64_si64` function.

```
checksum.c: In function 'do_csumcpy_mmx':
checksum.c:952:34: error: implicit declaration of function
'_mm_cvtm64_si64'; did you mean '_mm_cvtsi64_si32'?
[-Wimplicit-function-declaration]
  952 |                 *(int64_t*)dst = _mm_cvtm64_si64 (tmp);
      |                                  ^~~~~~~~~~~~~~~
      |                                  _mm_cvtsi64_si32
```

community/openpgm/32-bits-mmx.patch

+Source: https://github.com/steve-o/openpgm/pull/67.patch
+The paths were adjusted to the build directory path.
+--
+From b7fa865fa6b06d97d424c500fd1c4bc44c096359 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Sun, 1 Nov 2020 22:46:18 +0100
+Subject: [PATCH] openpgm/pgm/checksum.c: fix build with 32 bits MMX
+
+Build with i386-pentium-mmx or i686 is broken since version 5-3-128 and
+https://github.com/steve-o/openpgm/commit/b276dc15be5d4e6e1143b9de25d09f63f9c85135
+because _mm_cvtm64_si64 is undefined resulting in the following build
+failure for example on zeromq:
+
+/srv/storage/autobuild/run/instance-3/output-1/host/opt/ext-toolchain/bin/../lib/gcc/i586-buildroot-linux-musl/8.3.0/../../../../i586-buildroot-linux-musl/bin/ld: /srv/storage/autobuild/run/instance-3/output-1/host/i586-buildroot-linux-musl/sysroot/usr/lib32/libpgm-5.3.so.0: undefined reference to `_mm_cvtm64_si64'
+
+So use the fallback if __x86_64__ is not defined
+
+Fixes:
+ - http://autobuild.buildroot.org/results/01d9be37e8a743307128f53f41785654c9971e1a
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ openpgm/pgm/checksum.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/openpgm/pgm/checksum.c b/openpgm/pgm/checksum.c
+index fef89bce2..8d8dd3f32 100644
+--- a/checksum.c
++++ b/checksum.c
+@@ -948,7 +948,7 @@ do_csumcpy_mmx (
+ 
+ 		sum = _mm_add_pi32 (sum, lo);
+ 		sum = _mm_add_pi32 (sum, hi);
+-#if 1
++#if defined(__x86_64__)
+ 		*(int64_t*)dst = _mm_cvtm64_si64 (tmp);
+ #else		
+ 		((int*)dst)[1] = _mm_cvtsi64_si32 (tmp);

community/openpgm/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: Timo Teräs <timo.teras@iki.fi>
 pkgname=openpgm
 pkgver=5.3.128
-pkgrel=0
+pkgrel=1
 pkgdesc="Implementation of the PGM reliable multicast protocol"
 url="https://www.freshports.org/net/openpgm/"
 arch="all"
@@ -15,7 +15,9 @@ makedepends="
 	python3
 	"
 subpackages="$pkgname-dev"
-source="https://github.com/steve-o/openpgm/archive/refs/tags/release-${pkgver//./-}.tar.gz"
+source="https://github.com/steve-o/openpgm/archive/refs/tags/release-${pkgver//./-}.tar.gz
+	32-bits-mmx.patch
+	"
 builddir="$srcdir/openpgm-release-${pkgver//./-}/openpgm/pgm"
 options="!check" # no tests
 
@@ -41,4 +43,5 @@ package() {
 
 sha512sums="
 ad1148cb01d982be48ca35c027938e60fc86f2da3de14e994c3d390a6c5b13385893f2bd87d23c2d6cbd9015770ff72ef6fb1090b6ccf3bfd0812189e67fd3bd  release-5-3-128.tar.gz
+e28ef5cbea52209f0405fa50d479ed2c8cf7cc1fcd82d4aa44fa8857b6af91c7f352d7afefee216de7a5ce23af6ed190072c9f29b686021b61396bdcb86ac50d  32-bits-mmx.patch
 "