On OSF/1 5.1, the function tcgetsid() exists but is not declared by default.
(It would be with _XOPEN_SOURCE=500, but this is not a choice we can make.)
This leads to an error:
In file included from test-termios-c++.cc:22:
../gllib/termios.h:355: error: '::tcgetsid' has not been declared
../gllib/termios.h:356: error: 'tcgetsid' was not declared in this scope
../gllib/termios.h:356: error: invalid type in declaration before ';' token
test-termios-c++.cc:28: warning: 'signature_check28' defined but not used
*** Exit 1
Here's the workaround:
2010-12-19 Bruno Haible <br...@clisp.org>
tcgetsid: Add missing declaration on OSF/1 5.1.
* lib/termios.in.h (tcgetsid): Test HAVE_DECL_TCGETSID instead of
HAVE_TCGETSID.
* m4/tcgetsid.m4 (gl_FUNC_TCGETSID): Test whether tcgetsid is declared.
Don't set HAVE_TCGETSID.
* m4/termios_h.m4 (gl_TERMIOS_H_DEFAULTS): Initialize
HAVE_DECL_TCGETSID, not HAVE_TCGETSID.
* modules/termios (Makefile.am): Substitute HAVE_DECL_TCGETSID, not
HAVE_TCGETSID.
* doc/posix-functions/tcgetsid.texi: Mention the OSF/1 5.1 problem.
--- doc/posix-functions/tcgetsid.texi.orig Mon Dec 20 00:42:54 2010
+++ doc/posix-functions/tcgetsid.texi Mon Dec 20 00:37:14 2010
@@ -8,8 +8,12 @@
Portability problems fixed by Gnulib:
@itemize
+...@item
This function is missing on some platforms:
MacOS X 10.3, FreeBSD 6.0, OpenBSD 4.5, Cygwin, mingw, Interix 3.5, BeOS.
+...@item
+This function is not declared on some platforms:
+OSF/1 5.1.
@end itemize
Portability problems not fixed by Gnulib:
--- lib/termios.in.h.orig Mon Dec 20 00:42:54 2010
+++ lib/termios.in.h Mon Dec 20 00:37:45 2010
@@ -47,7 +47,7 @@
The argument is a descriptor if this controlling terminal.
Return -1, with errno set, upon failure. errno = ENOSYS means that the
function is unsupported. */
-# if !...@have_tcgetsid@
+# if !...@have_decl_tcgetsid@
_GL_FUNCDECL_SYS (tcgetsid, pid_t, (int fd));
# endif
_GL_CXXALIAS_SYS (tcgetsid, pid_t, (int fd));
--- m4/tcgetsid.m4.orig Mon Dec 20 00:42:54 2010
+++ m4/tcgetsid.m4 Mon Dec 20 00:38:57 2010
@@ -1,4 +1,4 @@
-# tcgetsid.m4 serial 1
+# tcgetsid.m4 serial 2
dnl Copyright (C) 2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -11,9 +11,13 @@
dnl Persuade glibc <termios.h> to declare tcgetsid().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_DECLS_ONCE([tcgetsid])
+ if test $ac_cv_have_decl_tcgetsid = no; then
+ HAVE_DECL_TCGETSID=0
+ fi
+
AC_CHECK_FUNCS([tcgetsid])
if test $ac_cv_func_tcgetsid = no; then
- HAVE_TCGETSID=0
AC_LIBOBJ([tcgetsid])
gl_PREREQ_TCGETSID
fi
--- m4/termios_h.m4.orig Mon Dec 20 00:42:54 2010
+++ m4/termios_h.m4 Mon Dec 20 00:39:24 2010
@@ -1,4 +1,4 @@
-# termios_h.m4 serial 1
+# termios_h.m4 serial 2
dnl Copyright (C) 2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -37,6 +37,6 @@
[
GNULIB_TCGETSID=0; AC_SUBST([GNULIB_TCGETSID])
dnl Assume proper GNU behavior unless another module says otherwise.
- HAVE_TCGETSID=1; AC_SUBST([HAVE_TCGETSID])
+ HAVE_DECL_TCGETSID=1; AC_SUBST([HAVE_DECL_TCGETSID])
HAVE_TERMIOS_H=1; AC_SUBST([HAVE_TERMIOS_H])
])
--- modules/termios.orig Mon Dec 20 00:42:54 2010
+++ modules/termios Mon Dec 20 00:39:11 2010
@@ -26,7 +26,7 @@
-e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
-e 's|@''NEXT_TERMIOS_H''@|$(NEXT_TERMIOS_H)|g' \
-e 's|@''GNULIB_TCGETSID''@|$(GNULIB_TCGETSID)|g' \
- -e 's|@''HAVE_TCGETSID''@|$(HAVE_TCGETSID)|g' \
+ -e 's|@''HAVE_DECL_TCGETSID''@|$(HAVE_DECL_TCGETSID)|g' \
-e 's|@''HAVE_TERMIOS_H''@|$(HAVE_TERMIOS_H)|g' \
-e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
-e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
