Temporarily disable chacha_core4 optimization on ppc64le

nettle.spec

@@ -15,7 +15,7 @@
 
 Name:           nettle
 Version:        3.7
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        A low-level cryptographic library
 
 License:        LGPLv3+ or GPLv2+
@@ -77,6 +77,11 @@ sed s/ggdb3/g/ -i configure
 sed 's/ecc-secp192r1.c//g' -i Makefile.in
 sed 's/ecc-secp224r1.c//g' -i Makefile.in
 
+# Temporarily disable chacha_core4 optimization on ppc64le:
+# https://lists.lysator.liu.se/pipermail/nettle-bugs/2021/009419.html
+rm powerpc64/p7/chacha-4core.asm
+rm powerpc64/fat/chacha-4core.asm
+
 %build
 autoreconf -ifv
 %configure --enable-shared --enable-fat
@@ -171,6 +176,9 @@ make check
 
 
 %changelog
+* Tue Feb  9 2021 Daiki Ueno <dueno@redhat.com> - 3.7-3
+- Temporarily disable chacha_core4 optimization on ppc64le
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 3.7-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild