gettimeofday: port recent C++ fix to Emacs

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

diff --git a/doc/posix-functions/alarm.texi b/doc/posix-functions/alarm.texi
index 79d2db1..2a6c4f2 100644 (file)
--- a/doc/posix-functions/alarm.texi
+++ b/doc/posix-functions/alarm.texi
@@ -13,6 +13,16 @@ Portability problems fixed by Gnulib:
 Portability problems not fixed by Gnulib:
 @itemize
 @item
+This function has no impact if <code>SIGALRM</code> is inherited as
+ignored; programs should use <code>signal (SIGALRM, SIG_DFL)</code> if
+it is important to ensure the alarm will fire.
+@item
+Use of this function in multi-threaded applications is not advised.
+@item
 This function is missing on some platforms:
-mingw, MSVC 9.
+mingw (2011), MSVC 9.
+@item
+This function is conditionally declared in the non-standard
+@code{<io.h>} header on some platforms:
+mingw (2012 or newer).
 @end itemize