Dogcows Code - chaz/tar/blob - m4/xstrtoimax.m4

   1 #serial 2
   2 dnl Cloned from xstrtoumax.m4.  Keep these files in sync.
   3
   4 # autoconf tests required for use of xstrtoimax.c
   5
   6 AC_DEFUN([jm_AC_PREREQ_XSTRTOIMAX],
   7 [
   8   AC_REQUIRE([jm_AC_TYPE_INTMAX_T])
   9   AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])
  10   AC_REQUIRE([jm_AC_TYPE_LONG_LONG])
  11   AC_REQUIRE([jm_AC_TYPE_UNSIGNED_LONG_LONG])
  12   AC_CHECK_DECLS([strtol, strtoul, strtoll, strtoimax, strtoumax])
  13   AC_CHECK_HEADERS(limits.h stdlib.h inttypes.h)
  14
  15   AC_CACHE_CHECK([whether <inttypes.h> defines strtoimax as a macro],
  16     jm_cv_func_strtoimax_macro,
  17     AC_EGREP_CPP([inttypes_h_defines_strtoimax], [#include <inttypes.h>
  18 #ifdef strtoimax
  19  inttypes_h_defines_strtoimax
  20 #endif],
  21       jm_cv_func_strtoimax_macro=yes,
  22       jm_cv_func_strtoimax_macro=no))
  23
  24   if test "$jm_cv_func_strtoimax_macro" != yes; then
  25     AC_REPLACE_FUNCS(strtoimax)
  26   fi
  27
  28   dnl Only the replacement strtoimax invokes strtol and strtoll,
  29   dnl so we need the replacements only if strtoimax does not exist.
  30   case "$jm_cv_func_strtoimax_macro,$ac_cv_func_strtoimax" in
  31     no,no)
  32       AC_REPLACE_FUNCS(strtol)
  33
  34       dnl We don't need (and can't compile) the replacement strtoll
  35       dnl unless the type `long long' exists.
  36       if test "$ac_cv_type_long_long" = yes; then
  37         AC_REPLACE_FUNCS(strtoll)
  38       fi
  39       ;;
  40   esac
  41 ])