| 1 | # snprintf.m4 serial 7
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| 2 | dnl Copyright (C) 2002-2004, 2007-2021 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 snprintf only if it does not support %1$s,
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| 8 | dnl but defers to any gnulib snprintf replacements. Therefore, gnulib
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| 9 | dnl must guarantee that the decision for replacing snprintf is a superset
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| 10 | dnl of the reasons checked by libintl.
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| 11 | AC_DEFUN([gl_FUNC_SNPRINTF],
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| 12 | [
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| 13 | AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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| 14 | gl_cv_func_snprintf_usable=no
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| 15 | AC_CHECK_FUNCS([snprintf])
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| 16 | if test $ac_cv_func_snprintf = yes; then
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| 17 | gl_SNPRINTF_SIZE1
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| 18 | case "$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_snprintf_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_snprintf_usable = no; then
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| 35 | gl_REPLACE_SNPRINTF
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| 36 | fi
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| 37 | AC_CHECK_DECLS_ONCE([snprintf])
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| 38 | if test $ac_cv_have_decl_snprintf = no; then
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| 39 | HAVE_DECL_SNPRINTF=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_SNPRINTF],
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| 44 | [
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| 45 | AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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| 46 | AC_LIBOBJ([snprintf])
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| 47 | if test $ac_cv_func_snprintf = yes; then
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| 48 | REPLACE_SNPRINTF=1
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| 49 | else
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| 50 | AC_CHECK_DECLS_ONCE([snprintf])
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| 51 | if test $ac_cv_have_decl_snprintf = 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_snprintf, not snprintf.
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| 55 | REPLACE_SNPRINTF=1
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| 56 | fi
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| 57 | fi
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| 58 | gl_PREREQ_SNPRINTF
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| 59 | ])
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| 60 |
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| 61 | # Prerequisites of lib/snprintf.c.
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| 62 | AC_DEFUN([gl_PREREQ_SNPRINTF], [:])
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