pthread_sigmask: Work around Cygwin bug.

[gnulib.git] / doc / posix-functions / pthread_sigmask.texi

diff --git a/doc/posix-functions/pthread_sigmask.texi b/doc/posix-functions/pthread_sigmask.texi
index 62f0a76..58b6295 100644 (file)
--- a/doc/posix-functions/pthread_sigmask.texi
+++ b/doc/posix-functions/pthread_sigmask.texi
@@ -19,6 +19,10 @@ MacOS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6.
 This function does nothing and always returns 0 in programs that are not
 linked with @code{-lpthread} on some platforms:
 FreeBSD 6.4, HP-UX 11.31, Solaris 9.
+@item
+When it fails, this functions returns -1 instead of the error number on
+some platforms:
+Cygwin 1.7.5.
 @end itemize
 
 Portability problems not fixed by Gnulib: