doc: Improve doc regarding autopoint vs. gnulib.

[gnulib.git] / doc / posix-headers / signal.texi

diff --git a/doc/posix-headers/signal.texi b/doc/posix-headers/signal.texi
index 860a79d..77a5432 100644 (file)
--- a/doc/posix-headers/signal.texi
+++ b/doc/posix-headers/signal.texi
@@ -1,13 +1,17 @@
 @node signal.h
 @section @file{signal.h}
 
-POSIX specification: @url{http://www.opengroup.org/susv3xbd/signal.h.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html}
 
 Gnulib module: signal
 
 Portability problems fixed by Gnulib:
 @itemize
 @item
+@code{volatile sig_atomic_t} is rejected by older compilers on some
+platforms:
+AIX.
+@item
 @code{sigset_t} is only declared in <sys/types.h> on some platforms:
 mingw.
 @item
@@ -31,4 +35,12 @@ Portability problems not fixed by Gnulib:
 @item
 Many signals are not defined on some platforms:
 mingw.
+@item
+The macros @code{SIGRTMIN} and @code{SIGRTMAX} expand to an expression of type
+@code{long} instead of @code{int} on some platforms:
+OSF/1 5.1.
+@item
+The macro @code{SIGBUS} is set to the same value as @code{SIGSEGV},
+rather than being a distinct signal, on some platforms:
+Haiku.
 @end itemize