net-misc/memcached: tweak crc32c build on ia64, bug #718136

Closes: https://bugs.gentoo.org/718136
Package-Manager: Portage-2.3.99, Repoman-2.3.22
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/net-misc/memcached/files/memcached-1.6.5-ia64.patch b/net-misc/memcached/files/memcached-1.6.5-ia64.patch
new file mode 100644
index 000000000000..5a73913b92e6
--- /dev/null
+++ b/net-misc/memcached/files/memcached-1.6.5-ia64.patch
@@ -0,0 +1,51 @@
+https://github.com/memcached/memcached/commit/73633d31b22068dfda5ef969c08139c083d96d71.patch
+
+From 73633d31b22068dfda5ef969c08139c083d96d71 Mon Sep 17 00:00:00 2001
+From: Sergei Trofimovich <slyfox@gentoo.org>
+Date: Sun, 19 Apr 2020 10:08:19 +0100
+Subject: [PATCH] crc32c.c: don't attempt to enable hardware crc32 on ia64
+
+Itanium has no hardware crc32 implementation and build fails as:
+
+```
+ia64-unknown-linux-gnu-gcc -DHAVE_CONFIG_H -I.  -DNDEBUG   -g -O2 -pthread \
+    ... -c -o memcached-crc32c.o `test -f 'crc32c.c' || echo './'`crc32c.c
+crc32c.c: In function 'crc32c_init':
+crc32c.c:385:9: error: unknown register name '%edx' in 'asm'
+  385 |         __asm__("cpuid" \
+      |         ^~~~~~~
+```
+
+The change removes ia64 from crc32 paths.
+
+Bug: https://bugs.gentoo.org/718136
+Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
+---
+ crc32c.c | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+--- a/crc32c.c
++++ b/crc32c.c
+@@ -167,7 +167,7 @@ static uint32_t crc32c_hw_aarch64(uint32_t crc, const void* buf, size_t len)
+ #endif
+ 
+ /* Apply if the platform is intel */
+-#if defined(__X86_64__)||defined(__x86_64__)||defined(__ia64__)
++#if defined(__X86_64__)||defined(__x86_64__)
+ 
+ /* Multiply a matrix times a vector over the Galois field of two elements,
+    GF(2).  Each element is a bit in an unsigned integer.  mat must have at
+@@ -388,12 +388,11 @@ static uint32_t crc32c_hw(uint32_t crc, const void *buf, size_t len)
+                 : "%ebx", "%edx"); \
+         (have) = (ecx >> 20) & 1; \
+     } while (0)
+-
+ #endif
+ /* Compute a CRC-32C.  If the crc32 instruction is available, use the hardware
+    version.  Otherwise, use the software version. */
+ void crc32c_init(void) {
+-    #if defined(__X86_64__)||defined(__x86_64__)||defined(__ia64__)
++    #if defined(__X86_64__)||defined(__x86_64__)
+     int sse42;
+     SSE42(sse42);
+