From 197cfd104914780a949b700c155e5f8d1d1b1963 Mon Sep 17 00:00:00 2001
From: Volker Braun <vbraun.name@gmail.com>
Date: Sun, 2 Jun 2024 14:46:56 +0200
Subject: [PATCH] Fix building fflas, linbox on 32-bit by disabling SSE, AVX

---
 .../patches/disable-sse-avx-on-32-bit.patch   | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 build/pkgs/fflas_ffpack/patches/disable-sse-avx-on-32-bit.patch

diff --git a/build/pkgs/fflas_ffpack/patches/disable-sse-avx-on-32-bit.patch b/build/pkgs/fflas_ffpack/patches/disable-sse-avx-on-32-bit.patch
new file mode 100644
index 00000000000..629511f844e
--- /dev/null
+++ b/build/pkgs/fflas_ffpack/patches/disable-sse-avx-on-32-bit.patch
@@ -0,0 +1,48 @@
+commit 621a3b0825d7f7ad463e8ae175db51b0ec15bcd5 (HEAD -> master)
+Author: Volker Braun <vbraun.name@gmail.com>
+Date:   Sun Jun 2 14:42:31 2024 +0200
+
+    Disable sse41, sse42, avx, avx2 on 32-bit
+    
+    This can potentially be provided by the CPU, but will not compile
+    since simd128_int64.inl is 64-bit only. Probably also makes not much
+    sense to try to hardware-accelerate 64-bit on 32-bit OS.
+
+diff --git a/fflas-ffpack/fflas-ffpack-config.h b/fflas-ffpack/fflas-ffpack-config.h
+index a8e6cb0d..ff538bc6 100644
+--- a/fflas-ffpack/fflas-ffpack-config.h
++++ b/fflas-ffpack/fflas-ffpack-config.h
+@@ -121,13 +121,16 @@ namespace std _GLIBCXX_VISIBILITY(default)
+ #define __FFLASFFPACK_HAVE_SSE3_INSTRUCTIONS  1
+ #endif
+ 
+-/* Define if sse4.1 instructions are supported */
+-#ifdef __SSE4_1__
++/* Define if sse4.1 instructions are supported
++ * Technically, sse4.1 could be supported on 32-bit but if you want to
++ * accelerate 64-bit simd you should start by installing a 64-bit OS
++ */
++#if defined(__SSE4_1__) && defined(__x86_64__)
+ #define __FFLASFFPACK_HAVE_SSE4_1_INSTRUCTIONS  1
+ #endif
+ 
+ /* Define if sse4.2 instructions are supported */
+-#ifdef __SSE4_2__
++#if defined(__SSE4_2__) && defined(__x86_64__)
+ #define __FFLASFFPACK_HAVE_SSE4_2_INSTRUCTIONS  1
+ #endif
+ 
+@@ -137,12 +140,12 @@ namespace std _GLIBCXX_VISIBILITY(default)
+ #if not defined(__CYGWIN__) or not defined(__GNUC__)
+ 
+ /* Define if avx instructions are supported */
+-#ifdef __AVX__
++#if defined(__AVX__) && defined(__x86_64__)
+ #define __FFLASFFPACK_HAVE_AVX_INSTRUCTIONS  1
+ #endif
+ 
+ /* Define if avx2 instructions are supported */
+-#ifdef __AVX2__
++#if defined(__AVX2__) && defined(__x86_64__)
+ #define __FFLASFFPACK_HAVE_AVX2_INSTRUCTIONS  1
+ #endif