obstack-printf-gnu: New module.

* m4/obstack-printf-posix.m4 (gl_FUNC_OBSTACK_PRINTF_IS_POSIX): New
macro, extracted from gl_FUNC_OBSTACK_PRINTF_POSIX.
(gl_FUNC_OBSTACK_PRINTF_POSIX): Require it. Invoke
gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS.
* m4/obstack-printf-gnu.m4: New file, based on
m4/obstack-printf-posix.m4.
* modules/obstack-printf-gnu: New file, based on modules/vasnprintf-gnu.
* doc/glibc-functions/obstack_printf.texi: Mention the new module.
* doc/glibc-functions/obstack_vprintf.texi: Likewise.

ChangeLog

@@ -1,3 +1,16 @@
+2023-03-24  Bruno Haible  <bruno@clisp.org>
+
+	obstack-printf-gnu: New module.
+	* m4/obstack-printf-posix.m4 (gl_FUNC_OBSTACK_PRINTF_IS_POSIX): New
+	macro, extracted from gl_FUNC_OBSTACK_PRINTF_POSIX.
+	(gl_FUNC_OBSTACK_PRINTF_POSIX): Require it. Invoke
+	gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS.
+	* m4/obstack-printf-gnu.m4: New file, based on
+	m4/obstack-printf-posix.m4.
+	* modules/obstack-printf-gnu: New file, based on modules/vasnprintf-gnu.
+	* doc/glibc-functions/obstack_printf.texi: Mention the new module.
+	* doc/glibc-functions/obstack_vprintf.texi: Likewise.
+
 2023-03-24  Bruno Haible  <bruno@clisp.org>
 
 	dprintf-gnu: Add tests.

doc/glibc-functions/obstack_printf.texi

@@ -10,17 +10,17 @@ Documentation:@*
 @url{https://www.gnu.org/software/libc/manual/html_node/Dynamic-Output.html}.
 @end ifnotinfo
 
-Gnulib module: obstack-printf or obstack-printf-posix
+Gnulib module: obstack-printf or obstack-printf-posix or obstack-printf-gnu
 
 Portability problems fixed by either Gnulib module
-@code{obstack-printf} or @code{obstack-printf-posix}:
+@code{obstack-printf} or @code{obstack-printf-posix} or @code{obstack-printf-gnu}:
 @itemize
 @item
 This function is missing on all non-glibc platforms:
 macOS 11.1, FreeBSD 13.0, NetBSD 9.0, OpenBSD 6.7, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.4, Cygwin 2.9, mingw, MSVC 14, Android 9.0.
 @end itemize
 
-Portability problems fixed by Gnulib module @code{obstack-printf-posix}:
+Portability problems fixed by either Gnulib module @code{obstack-printf-posix} or @code{obstack-printf-gnu}:
 @itemize
 @item
 This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
@@ -88,6 +88,13 @@ This function does not fully support the @samp{n} directive on some platforms:
 HP-UX 11, mingw, MSVC 14.
 @end itemize
 
+Portability problems fixed by Gnulib module @code{obstack-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 not fixed by Gnulib:
 @itemize
 @item

doc/glibc-functions/obstack_vprintf.texi

@@ -10,17 +10,17 @@ Documentation:@*
 @url{https://www.gnu.org/software/libc/manual/html_node/Variable-Arguments-Output.html}.
 @end ifnotinfo
 
-Gnulib module: obstack-printf or obstack-printf-posix
+Gnulib module: obstack-printf or obstack-printf-posix or obstack-printf-gnu
 
 Portability problems fixed by either Gnulib module
-@code{obstack-printf} or @code{obstack-printf-posix}:
+@code{obstack-printf} or @code{obstack-printf-posix} or @code{obstack-printf-gnu}:
 @itemize
 @item
 This function is missing on all non-glibc platforms:
 macOS 11.1, FreeBSD 13.0, NetBSD 9.0, OpenBSD 6.7, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.4, Cygwin 2.9, mingw, MSVC 14, Android 9.0.
 @end itemize
 
-Portability problems fixed by Gnulib module @code{obstack-printf-posix}:
+Portability problems fixed by either Gnulib module @code{obstack-printf-posix} or @code{obstack-printf-gnu}:
 @itemize
 @item
 This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
@@ -88,6 +88,13 @@ This function does not fully support the @samp{n} directive on some platforms:
 HP-UX 11, mingw, MSVC 14.
 @end itemize
 
+Portability problems fixed by Gnulib module @code{obstack-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 not fixed by Gnulib:
 @itemize
 @item

m4/obstack-printf-gnu.m4

@@ -0,0 +1,26 @@
+# obstack-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_OBSTACK_PRINTF_GNU],
+[
+  AC_REQUIRE([gl_FUNC_OBSTACK_PRINTF_IS_POSIX])
+  AC_REQUIRE([gl_PRINTF_DIRECTIVE_UPPERCASE_B])
+  gl_cv_func_obstack_printf_gnu=no
+  if test $gl_cv_func_obstack_printf_posix = yes; then
+    case "$gl_cv_func_printf_directive_uppercase_b" in
+      *yes)
+        # obstack_printf exists and is already POSIX compliant and GNU compatible.
+        gl_cv_func_obstack_printf_gnu=yes
+        ;;
+    esac
+  fi
+  if test $gl_cv_func_obstack_printf_gnu = no; then
+    gl_PREREQ_VASNPRINTF_WITH_GNU_EXTRAS
+    gl_REPLACE_VASNPRINTF
+    gl_REPLACE_OBSTACK_PRINTF
+  fi
+  gl_DECL_OBSTACK_PRINTF
+])

m4/obstack-printf-posix.m4

@@ -1,10 +1,23 @@
-# obstack-printf-posix.m4 serial 6
+# obstack-printf-posix.m4 serial 7
 dnl Copyright (C) 2008-2023 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_OBSTACK_PRINTF_POSIX],
+[
+  AC_REQUIRE([gl_FUNC_OBSTACK_PRINTF_IS_POSIX])
+  if test $gl_cv_func_obstack_printf_posix = no; then
+    gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS
+    gl_REPLACE_VASNPRINTF
+    gl_REPLACE_OBSTACK_PRINTF
+  fi
+  gl_DECL_OBSTACK_PRINTF
+])
+
+dnl Test whether obstack_printf exists and is POSIX compliant.
+dnl Result is gl_cv_func_obstack_printf_posix.
+AC_DEFUN([gl_FUNC_OBSTACK_PRINTF_IS_POSIX],
 [
   dnl Persuade glibc <stdio.h> to declare obstack_printf(), obstack_vprintf().
   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
@@ -96,22 +109,4 @@ AC_DEFUN([gl_FUNC_OBSTACK_PRINTF_POSIX],
         ;;
     esac
   fi
-  if test $gl_cv_func_obstack_printf_posix = no; then
-    gl_PREREQ_VASNPRINTF_LONG_DOUBLE
-    gl_PREREQ_VASNPRINTF_INFINITE_DOUBLE
-    gl_PREREQ_VASNPRINTF_INFINITE_LONG_DOUBLE
-    gl_PREREQ_VASNPRINTF_DIRECTIVE_A
-    gl_PREREQ_VASNPRINTF_DIRECTIVE_B
-    gl_PREREQ_VASNPRINTF_DIRECTIVE_F
-    gl_PREREQ_VASNPRINTF_DIRECTIVE_LS
-    gl_PREREQ_VASNPRINTF_DIRECTIVE_LC
-    gl_PREREQ_VASNPRINTF_FLAG_GROUPING
-    gl_PREREQ_VASNPRINTF_FLAG_LEFTADJUST
-    gl_PREREQ_VASNPRINTF_FLAG_ZERO
-    gl_PREREQ_VASNPRINTF_PRECISION
-    gl_PREREQ_VASNPRINTF_ENOMEM
-    gl_REPLACE_VASNPRINTF
-    gl_REPLACE_OBSTACK_PRINTF
-  fi
-  gl_DECL_OBSTACK_PRINTF
 ])

modules/obstack-printf-gnu

@@ -0,0 +1,31 @@
+Description:
+POSIX and GNU compatible formatted printing into an obstack.
+
+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/obstack-printf-gnu.m4
+
+Depends-on:
+obstack-printf-posix
+
+configure.ac:
+gl_FUNC_OBSTACK_PRINTF_GNU
+if test $ac_cv_func_obstack_printf = no || test $REPLACE_OBSTACK_PRINTF = 1; then
+  AC_LIBOBJ([obstack_printf])
+fi
+
+Makefile.am:
+
+Include:
+<stdio.h>
+
+License:
+GPL
+
+Maintainer:
+Eric Blake