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fmaf: Document QEMU bug
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From: |
Bruno Haible |
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Subject: |
fmaf: Document QEMU bug |
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Date: |
Sun, 31 Jan 2021 13:31:14 +0100 |
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User-agent: |
KMail/5.1.3 (Linux/4.4.0-197-generic; KDE/5.18.0; x86_64; ; ) |
On my Alpine Linux 3.13/powerpcle system, the fmaf configure test is reported
as "checking whether fmaf works... no". As far as I can see, it's a QEMU bug.
Let me document it here.
2021-01-31 Bruno Haible <bruno@clisp.org>
fmaf: Document QEMU bug.
* doc/posix-functions/fmaf.texi: Add note about QEMU bug.
diff --git a/doc/posix-functions/fmaf.texi b/doc/posix-functions/fmaf.texi
index 1e0d34a..3551d19 100644
--- a/doc/posix-functions/fmaf.texi
+++ b/doc/posix-functions/fmaf.texi
@@ -18,4 +18,8 @@ glibc 2.11, Mac OS X 10.5, FreeBSD 6.4/x86, FreeBSD 12.2/arm,
Cygwin 1.5, mingw.
Portability problems not fixed by Gnulib:
@itemize
+@item
+This function produces wrong results on some platforms:
+musl libc/powerpc64le when emulated by QEMU 5.0.0.
+@c https://bugs.launchpad.net/qemu/+bug/1912934
@end itemize
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