snprintf.m4 1.54 KB
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# snprintf.m4 serial 6
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dnl Copyright (C) 2002-2004, 2007-2016 Free Software Foundation, Inc.
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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.
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dnl Libintl 0.17 will replace snprintf only if it does not support %1$s,
dnl but defers to any gnulib snprintf replacements.  Therefore, gnulib
dnl must guarantee that the decision for replacing snprintf is a superset
dnl of the reasons checked by libintl.
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AC_DEFUN([gl_FUNC_SNPRINTF],
[
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  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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  gl_cv_func_snprintf_usable=no
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  AC_CHECK_FUNCS([snprintf])
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  if test $ac_cv_func_snprintf = yes; then
    gl_SNPRINTF_SIZE1
    case "$gl_cv_func_snprintf_size1" in
      *yes)
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        gl_SNPRINTF_RETVAL_C99
        case "$gl_cv_func_snprintf_retval_c99" in
          *yes)
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            gl_PRINTF_POSITIONS
            case "$gl_cv_func_printf_positions" in
              *yes)
                gl_cv_func_snprintf_usable=yes
                ;;
            esac
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            ;;
        esac
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        ;;
    esac
  fi
  if test $gl_cv_func_snprintf_usable = no; then
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    gl_REPLACE_SNPRINTF
  fi
  AC_CHECK_DECLS_ONCE([snprintf])
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  if test $ac_cv_have_decl_snprintf = no; then
    HAVE_DECL_SNPRINTF=0
  fi
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])

AC_DEFUN([gl_REPLACE_SNPRINTF],
[
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  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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  AC_LIBOBJ([snprintf])
  if test $ac_cv_func_snprintf = yes; then
    REPLACE_SNPRINTF=1
  fi
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  gl_PREREQ_SNPRINTF
])

# Prerequisites of lib/snprintf.c.
AC_DEFUN([gl_PREREQ_SNPRINTF], [:])