strchrnul: 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 b7011a01be91db502d97c32be151b972c572f670..d156461aced551ff73e690e746e85e796626b55d 100644 (file)
--- a/doc/posix-functions/putc.texi
+++ b/doc/posix-functions/putc.texi
@@ -4,9 +4,18 @@
 
 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/putc.html}
 
-Gnulib module: stdio, sigpipe
+Gnulib module: stdio, nonblocking, sigpipe
 
-Portability problems fixed by Gnulib:
+Portability problems fixed by Gnulib module @code{stdio}, together with module @code{nonblocking}:
+@itemize
+@item
+When writing to a non-blocking pipe whose buffer is full, this function fails
+with @code{errno} being set to @code{ENOSPC} instead of @code{EAGAIN} on some
+platforms:
+mingw.
+@end itemize
+
+Portability problems fixed by Gnulib module @code{stdio}, together with module @code{sigpipe}:
 @itemize
 @item
 When writing to a pipe with no readers, this function fails, instead of