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Description: Undefine count_leading_zeros and count_trailing_zeros in lonlong.h
The fallbacks at the end of the file are only defined when there is no
definition yet. When building SageMath it can happen that the symbols are already
defined in a givaro header. That lead to build failures on architectures that
are supposed to use the fallback here, like arm64 and ppc64el.
Author: Tobias Hansen <thansen@debian.org>
--- a/longlong.h
+++ b/longlong.h
@@ -32,6 +32,11 @@
extern "C" {
#endif
+/* Undefine to make the ifndef logic below for the fallback
+ work even if the symbols are already defined (e.g. by givaro). */
+#undef count_leading_zeros
+#undef count_trailing_zeros
+
/* x86 : 64 bit */
#if (GMP_LIMB_BITS == 64 && defined (__amd64__))
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