+ gl_NEXT_HEADERS([stdio.h])
+
+ dnl Determine whether __USE_MINGW_ANSI_STDIO makes printf and
+ dnl inttypes.h behave like gnu instead of system; we must give our
+ dnl printf wrapper the right attribute to match.
+ AC_CACHE_CHECK([which flavor of printf attribute matches inttypes macros],
+ [gl_cv_func_printf_attribute_flavor],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #define __STDC_FORMAT_MACROS 1
+ #include <stdio.h>
+ #include <inttypes.h>
+ /* For non-mingw systems, compilation will trivially succeed.
+ For mingw, compilation will succeed for older mingw (system
+ printf, "I64d") and fail for newer mingw (gnu printf, "lld"). */
+ #if ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__) && \
+ (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+ extern char PRIdMAX_probe[sizeof PRIdMAX == sizeof "I64d" ? 1 : -1];
+ #endif
+ ]])], [gl_cv_func_printf_attribute_flavor=system],
+ [gl_cv_func_printf_attribute_flavor=gnu])])
+ if test "$gl_cv_func_printf_attribute_flavor" = gnu; then
+ AC_DEFINE([GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU], [1],
+ [Define to 1 if printf and friends should be labeled with
+ attribute "__gnu_printf__" instead of "__printf__"])
+ fi
+
+ dnl No need to create extra modules for these functions. Everyone who uses
+ dnl <stdio.h> likely needs them.
+ GNULIB_FSCANF=1
+ gl_MODULE_INDICATOR([fscanf])
+ GNULIB_SCANF=1
+ gl_MODULE_INDICATOR([scanf])
+ GNULIB_FGETC=1
+ GNULIB_GETC=1
+ GNULIB_GETCHAR=1
+ GNULIB_FGETS=1
+ GNULIB_FREAD=1
+ dnl This ifdef is necessary to avoid an error "missing file lib/stdio-read.c"
+ dnl "expected source file, required through AC_LIBSOURCES, not found". It is
+ dnl also an optimization, to avoid performing a configure check whose result
+ dnl is not used. But it does not make the test of GNULIB_STDIO_H_NONBLOCKING
+ dnl or GNULIB_NONBLOCKING redundant.
+ m4_ifdef([gl_NONBLOCKING_IO], [
+ gl_NONBLOCKING_IO
+ if test $gl_cv_have_nonblocking != yes; then
+ REPLACE_STDIO_READ_FUNCS=1
+ AC_LIBOBJ([stdio-read])
+ fi
+ ])
+