m4/strtoimax.m4

   1 # strtoimax.m4 serial 14
   2 dnl Copyright (C) 2002-2004, 2006, 2009-2014 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_FUNC_STRTOIMAX],
   8 [
   9   AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
  10
  11   dnl On OSF/1 5.1 with cc, this function is declared but not defined.
  12   AC_CHECK_FUNCS_ONCE([strtoimax])
  13   AC_CHECK_DECLS_ONCE([strtoimax])
  14   if test "$ac_cv_have_decl_strtoimax" != yes; then
  15     HAVE_DECL_STRTOIMAX=0
  16   fi
  17
  18   if test "$ac_cv_func_strtoimax" = yes; then
  19     HAVE_STRTOIMAX=1
  20     dnl On AIX 5.1, strtoimax() fails for values outside the 'int' range.
  21     AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  22     AC_CACHE_CHECK([whether strtoimax works], [gl_cv_func_strtoimax],
  23       [AC_RUN_IFELSE(
  24          [AC_LANG_SOURCE([[
  25 #include <errno.h>
  26 #include <string.h>
  27 #include <inttypes.h>
  28 int main ()
  29 {
  30   if (sizeof (intmax_t) > sizeof (int))
  31     {
  32       const char *s = "4294967295";
  33       char *p;
  34       intmax_t res;
  35       errno = 0;
  36       res = strtoimax (s, &p, 10);
  37       if (p != s + strlen (s))
  38         return 1;
  39       if (errno != 0)
  40         return 2;
  41       if (res != (intmax_t) 65535 * (intmax_t) 65537)
  42         return 3;
  43     }
  44   else
  45     {
  46       const char *s = "2147483647";
  47       char *p;
  48       intmax_t res;
  49       errno = 0;
  50       res = strtoimax (s, &p, 10);
  51       if (p != s + strlen (s))
  52         return 1;
  53       if (errno != 0)
  54         return 2;
  55       if (res != 2147483647)
  56         return 3;
  57     }
  58   return 0;
  59 }
  60 ]])],
  61          [gl_cv_func_strtoimax=yes],
  62          [gl_cv_func_strtoimax=no],
  63          [case "$host_os" in
  64                    # Guess no on AIX 5.
  65             aix5*) gl_cv_func_strtoimax="guessing no" ;;
  66                    # Guess yes otherwise.
  67             *)     gl_cv_func_strtoimax="guessing yes" ;;
  68           esac
  69          ])
  70       ])
  71     case "$gl_cv_func_strtoimax" in
  72       *no) REPLACE_STRTOIMAX=1 ;;
  73     esac
  74   else
  75     if test "$ac_cv_have_decl_strtoimax" = yes; then
  76       # HP-UX 11.11 has "#define strtoimax(...) ..." but no function.
  77       REPLACE_STRTOIMAX=1
  78     fi
  79     HAVE_STRTOIMAX=0
  80   fi
  81 ])
  82
  83 # Prerequisites of lib/strtoimax.c.
  84 AC_DEFUN([gl_PREREQ_STRTOIMAX], [
  85   AC_CHECK_DECLS([strtoll])
  86   AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
  87 ])