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annotate m4/vsnprintf.m4 @ 40057:b06060465f09

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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 10eb9086bea0
children
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1 # vsnprintf.m4 serial 7
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2 dnl Copyright (C) 2002-2004, 2007-2019 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 dnl Libintl 0.17 will replace vsnprintf only if it does not support %1$s,
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8 dnl but defers to any gnulib vsnprintf replacements. Therefore, gnulib
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9 dnl must guarantee that the decision for replacing vsnprintf is a superset
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10 dnl of the reasons checked by libintl.
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11 AC_DEFUN([gl_FUNC_VSNPRINTF],
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12 [
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13 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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14 gl_cv_func_vsnprintf_usable=no
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15 AC_CHECK_FUNCS([vsnprintf])
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16 if test $ac_cv_func_vsnprintf = yes; then
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17 gl_SNPRINTF_SIZE1
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18 case "$gl_cv_func_snprintf_size1" in
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19 *yes)
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20 gl_SNPRINTF_RETVAL_C99
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21 case "$gl_cv_func_snprintf_retval_c99" in
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22 *yes)
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23 gl_PRINTF_POSITIONS
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24 case "$gl_cv_func_printf_positions" in
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25 *yes)
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26 gl_cv_func_vsnprintf_usable=yes
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27 ;;
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28 esac
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29 ;;
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30 esac
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31 ;;
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32 esac
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33 fi
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34 if test $gl_cv_func_vsnprintf_usable = no; then
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35 gl_REPLACE_VSNPRINTF
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36 fi
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37 AC_CHECK_DECLS_ONCE([vsnprintf])
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38 if test $ac_cv_have_decl_vsnprintf = no; then
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39 HAVE_DECL_VSNPRINTF=0
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40 fi
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41 ])
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42
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43 AC_DEFUN([gl_REPLACE_VSNPRINTF],
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44 [
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45 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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46 AC_LIBOBJ([vsnprintf])
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47 if test $ac_cv_func_vsnprintf = yes; then
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48 REPLACE_VSNPRINTF=1
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49 else
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50 AC_CHECK_DECLS_ONCE([vsnprintf])
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51 if test $ac_cv_have_decl_vsnprintf = yes; then
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52 dnl If the function is declared but does not appear to exist, it may be
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53 dnl defined as an inline function. In order to avoid a conflict, we have
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54 dnl to define rpl_vsnprintf, not vsnprintf.
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55 REPLACE_VSNPRINTF=1
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56 fi
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57 fi
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58 gl_PREREQ_VSNPRINTF
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59 ])
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60
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61 # Prerequisites of lib/vsnprintf.c.
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62 AC_DEFUN([gl_PREREQ_VSNPRINTF], [:])