From c922a4f8903c70c75d23734efe3fa0f93a6dead4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niels=20M=C3=B6ller?= <nisse@lysator.liu.se>
Date: Wed, 2 Apr 2025 16:39:03 +0200
Subject: [PATCH] ppc64: Use assembly files only if __VSX__ is defined.
---
ChangeLog | 4 ++++
configure.ac | 10 ++++++++++
2 files changed, 14 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index 6ddde442..4470c32f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
2025-04-02 Niels Möller <nisse@lysator.liu.se>
+ Cherry-picked from branch nettle-3.10-fixes:
+ * configure.ac: For ppc64, check if __VSX__ is defined, and
+ disable use of assembly if it isn't.
+
* .gitlab-ci.yml: Fix native/fat to actually run make
check-fat-override. Add an EXTRA_CHECK_TARGET variable also for
the .cross-build template, use it for check-fat-override where
diff --git a/configure.ac b/configure.ac
index 3d41974b..53e9013c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -367,6 +367,16 @@ case "$host_cpu" in
]], [[]])], [], [
ELFV2_ABI=yes
])
+ if test "$enable_assembler" = yes ; then
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#if defined(__VSX__)
+#error VSX available
+#endif
+ ]], [[]])], [
+ AC_MSG_WARN([VSX instructions (Power7 or later) not available, disabling use of assembly.])
+ enable_assembler=no
+ ], [])
+ fi
fi
;;
aarch64*)
--
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