contrib/binutils/gas/acinclude.m4

   1 dnl GAS_CHECK_DECL_NEEDED(name, typedefname, typedef, headers)
   2 AC_DEFUN([GAS_CHECK_DECL_NEEDED],[
   3 AC_MSG_CHECKING(whether declaration is required for $1)
   4 AC_CACHE_VAL(gas_cv_decl_needed_$1,
   5 AC_TRY_LINK([$4],
   6 [
   7 typedef $3;
   8 $2 x;
   9 x = ($2) $1;
  10 ], gas_cv_decl_needed_$1=no, gas_cv_decl_needed_$1=yes))dnl
  11 AC_MSG_RESULT($gas_cv_decl_needed_$1)
  12 if test $gas_cv_decl_needed_$1 = yes; then
  13  AC_DEFINE([NEED_DECLARATION_]translit($1, [a-z], [A-Z]), 1,
  14            [Define if $1 is not declared in system header files.])
  15 fi
  16 ])dnl
  17 dnl
  18 dnl Some non-ANSI preprocessors botch requoting inside strings.  That's bad
  19 dnl enough, but on some of those systems, the assert macro relies on requoting
  20 dnl working properly!
  21 dnl GAS_WORKING_ASSERT
  22 AC_DEFUN([GAS_WORKING_ASSERT],
  23 [AC_MSG_CHECKING([for working assert macro])
  24 AC_CACHE_VAL(gas_cv_assert_ok,
  25 AC_TRY_LINK([#include <assert.h>
  26 #include <stdio.h>], [
  27 /* check for requoting problems */
  28 static int a, b, c, d;
  29 static char *s;
  30 assert (!strcmp(s, "foo bar baz quux"));
  31 /* check for newline handling */
  32 assert (a == b
  33         || c == d);
  34 ], gas_cv_assert_ok=yes, gas_cv_assert_ok=no))dnl
  35 AC_MSG_RESULT($gas_cv_assert_ok)
  36 test $gas_cv_assert_ok = yes || AC_DEFINE(BROKEN_ASSERT, 1, [assert broken?])
  37 ])dnl
  38 dnl
  39 dnl Since many Bourne shell implementations lack subroutines, use this
  40 dnl hack to simplify the code in configure.in.
  41 dnl GAS_UNIQ(listvar)
  42 AC_DEFUN([GAS_UNIQ],
  43 [_gas_uniq_list="[$]$1"
  44 _gas_uniq_newlist=""
  45 dnl Protect against empty input list.
  46 for _gas_uniq_i in _gas_uniq_dummy [$]_gas_uniq_list ; do
  47   case [$]_gas_uniq_i in
  48   _gas_uniq_dummy) ;;
  49   *) case " [$]_gas_uniq_newlist " in
  50        *" [$]_gas_uniq_i "*) ;;
  51        *) _gas_uniq_newlist="[$]_gas_uniq_newlist [$]_gas_uniq_i" ;;
  52      esac ;;
  53   esac
  54 done
  55 $1=[$]_gas_uniq_newlist
  56 ])dnl