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

   1 #serial 1
   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_HEADER_INTTYPES_H])
  10   AC_REQUIRE([jm_AC_TYPE_LONG_LONG])
  11   AC_CHECK_DECLS([strtol, strtoll])
  12   AC_CHECK_HEADERS(limits.h stdlib.h)
  13
  14   AC_CACHE_CHECK([whether <inttypes.h> defines strtoimax as a macro],
  15     jm_cv_func_strtoimax_macro,
  16     AC_EGREP_CPP([inttypes_h_defines_strtoimax], [#include <inttypes.h>
  17 #ifdef strtoimax
  18  inttypes_h_defines_strtoimax
  19 #endif],
  20       jm_cv_func_strtoimax_macro=yes,
  21       jm_cv_func_strtoimax_macro=no))
  22
  23   if test "$jm_cv_func_strtoimax_macro" != yes; then
  24     AC_REPLACE_FUNCS(strtoimax)
  25   fi
  26
  27   dnl We don't need (and can't compile) the replacement strtoll
  28   dnl unless the type `long long' exists.
  29   dnl Also, only the replacement strtoimax invokes strtoll,
  30   dnl so we need the replacement strtoll only if strtoimax does not exist.
  31   case "$ac_cv_type_long_long,$jm_cv_func_strtoimax_macro,$ac_cv_func_strtoimax" in
  32     yes,no,no)
  33       AC_REPLACE_FUNCS(strtoll)
  34
  35       dnl Check for strtol.  Mainly as a cue to cause automake to include
  36       dnl strtol.c -- that file is included by each of strtoul.c and strtoull.c.
  37       AC_REPLACE_FUNCS(strtol)
  38       ;;
  39   esac
  40
  41   case "$jm_cv_func_strtoimax_macro,$ac_cv_func_strtoimax" in
  42     no,no)
  43       AC_REPLACE_FUNCS(strtoul)
  44
  45       dnl See explanation above.
  46       AC_REPLACE_FUNCS(strtol)
  47       ;;
  48   esac
  49
  50 ])