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printf-gnu: New module.

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* m4/printf-posix.m4: Renamed from m4/printf-posix-rpl.m4.
(gl_FUNC_PRINTF_IS_POSIX): New macro.
(gl_FUNC_PRINTF_POSIX): Require it. Don't require
gl_FUNC_VFPRINTF_POSIX. Invoke gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS
and gl_REPLACE_VASNPRINTF.
* m4/printf-gnu.m4: New file, based on m4/fprintf-posix.m4.
* modules/printf-posix (Files): Update.
* modules/printf-gnu: New file, based on modules/vasnprintf-gnu.
* doc/posix-functions/printf.texi: Mention the new module.
This commit is contained in:
Bruno Haible
2023-03-24 11:55:38 +01:00
parent 57e16895ad
commit 171d2a5f80
6 changed files with 92 additions and 8 deletions
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13
ChangeLog
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@@ -1,3 +1,16 @@
2023-03-24 Bruno Haible <bruno@clisp.org>
printf-gnu: New module.
* m4/printf-posix.m4: Renamed from m4/printf-posix-rpl.m4.
(gl_FUNC_PRINTF_IS_POSIX): New macro.
(gl_FUNC_PRINTF_POSIX): Require it. Don't require
gl_FUNC_VFPRINTF_POSIX. Invoke gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS
and gl_REPLACE_VASNPRINTF.
* m4/printf-gnu.m4: New file, based on m4/fprintf-posix.m4.
* modules/printf-posix (Files): Update.
* modules/printf-gnu: New file, based on modules/vasnprintf-gnu.
* doc/posix-functions/printf.texi: Mention the new module.
2023-03-24 Bruno Haible <bruno@clisp.org>
vprintf-gnu: Add tests.

15
doc/posix-functions/printf.texi
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@@ -4,9 +4,9 @@
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/printf.html}
Gnulib module: printf-posix or stdio, nonblocking, sigpipe
Gnulib module: printf-posix or printf-gnu or stdio, nonblocking, sigpipe
Portability problems fixed by Gnulib module @code{printf-posix}:
Portability problems fixed by either Gnulib module @code{printf-posix} or @code{printf-gnu}:
@itemize
@item
This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
@@ -77,7 +77,14 @@ This function can crash in out-of-memory conditions on some platforms:
FreeBSD 13.0, NetBSD 5.0.
@end itemize
Portability problems fixed by Gnulib module @code{stdio} or @code{printf-posix}, together with module @code{nonblocking}:
Portability problems fixed by Gnulib module @code{printf-gnu}:
@itemize
@item
This function does not support the @samp{B} directive on some platforms:
glibc 2.34, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
@end itemize
Portability problems fixed by Gnulib module @code{stdio} or @code{printf-posix} or @code{printf-gnu}, together with module @code{nonblocking}:
@itemize
@item
When writing to a non-blocking pipe whose buffer is full, this function fails
@@ -86,7 +93,7 @@ platforms:
mingw, MSVC 14.
@end itemize
Portability problems fixed by Gnulib module @code{stdio} or @code{printf-posix}, together with module @code{sigpipe}:
Portability problems fixed by Gnulib module @code{stdio} or @code{printf-posix} or @code{printf-gnu}, together with module @code{sigpipe}:
@itemize
@item
When writing to a pipe with no readers, this function fails, instead of

25
m4/printf-gnu.m4 Normal file
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@@ -0,0 +1,25 @@
# printf-gnu.m4 serial 1
dnl Copyright (C) 2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_PRINTF_GNU],
[
AC_REQUIRE([gl_FUNC_PRINTF_IS_POSIX])
AC_REQUIRE([gl_PRINTF_DIRECTIVE_UPPERCASE_B])
gl_cv_func_printf_gnu=no
if test $gl_cv_func_printf_posix = yes; then
case "$gl_cv_func_printf_directive_uppercase_b" in
*yes)
# printf is already POSIX compliant and GNU compatible.
gl_cv_func_printf_gnu=yes
;;
esac
fi
if test $gl_cv_func_printf_gnu = no; then
gl_PREREQ_VASNPRINTF_WITH_GNU_EXTRAS
gl_REPLACE_VASNPRINTF
gl_REPLACE_PRINTF
fi
])

16
m4/printf-posix-rpl.m4 → m4/printf-posix.m4
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@@ -1,4 +1,4 @@
# printf-posix-rpl.m4 serial 4
# printf-posix.m4 serial 5
dnl Copyright (C) 2007-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -6,12 +6,22 @@ dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_PRINTF_POSIX],
[
AC_REQUIRE([gl_FUNC_VFPRINTF_POSIX])
if test $gl_cv_func_vfprintf_posix = no; then
AC_REQUIRE([gl_FUNC_PRINTF_IS_POSIX])
if test $gl_cv_func_printf_posix = no; then
gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS
gl_REPLACE_VASNPRINTF
gl_REPLACE_PRINTF
fi
])
dnl Test whether printf is POSIX compliant.
dnl Result is gl_cv_func_printf_posix.
AC_DEFUN([gl_FUNC_PRINTF_IS_POSIX],
[
AC_REQUIRE([gl_FUNC_VFPRINTF_IS_POSIX])
gl_cv_func_printf_posix="$gl_cv_func_vfprintf_posix"
])
AC_DEFUN([gl_REPLACE_PRINTF],
[
AC_REQUIRE([gl_STDIO_H_DEFAULTS])

29
modules/printf-gnu Normal file
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@@ -0,0 +1,29 @@
Description:
POSIX and GNU compatible printf() function: print formatted output to
standard output
Comment:
This module should not be used as a dependency from a test module,
otherwise when this module occurs as a tests-related module, it will
have side effects on the compilation of the 'vasnprintf' module, if
that module occurs among the main modules in lib/.
Files:
m4/printf-gnu.m4
Depends-on:
printf-posix
configure.ac:
gl_FUNC_PRINTF_GNU
Makefile.am:
Include:
<stdio.h>
License:
LGPL
Maintainer:
all

2
modules/printf-posix
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@@ -9,7 +9,7 @@ that module occurs among the main modules in lib/.
Files:
lib/printf.c
m4/printf-posix-rpl.m4
m4/printf-posix.m4
m4/printf.m4
m4/asm-underscore.m4