pthread_sigmask: Work around Cygwin bug.

[pspp] / doc / posix-functions / putc.texi

diff --git a/doc/posix-functions/putc.texi b/doc/posix-functions/putc.texi
index d156461aced551ff73e690e746e85e796626b55d..c6a815e3eeb9631a8681022f87ddb9335104f87e 100644 (file)
--- a/doc/posix-functions/putc.texi
+++ b/doc/posix-functions/putc.texi
@@ -28,4 +28,8 @@ Portability problems not fixed by Gnulib:
 @item
 On Windows platforms (excluding Cygwin), this function does not set @code{errno}
 upon failure.
+@item
+On some platforms, this function does not set @code{errno} or the
+stream error indicator on attempts to write to a read-only stream:
+Cygwin 1.7.9.
 @end itemize