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 $1 is not declared in system header files.])
  15 fi
  16 ])dnl
  17 dnl
  18 dnl Some non-ANSI preprocessors botch requoting inside strings.  That's bad
  19 dnl enough, but on some of those systems, the assert macro relies on requoting
  20 dnl working properly!
  21 dnl GAS_WORKING_ASSERT
  22 AC_DEFUN([GAS_WORKING_ASSERT],
  23 [AC_MSG_CHECKING([for working assert macro])
  24 AC_CACHE_VAL(gas_cv_assert_ok,
  25 AC_TRY_LINK([#include <assert.h>
  26 #include <string.h>
  27 #include <stdio.h>], [
  28 /* check for requoting problems */
  29 static int a, b, c, d;
  30 static char *s;
  31 assert (!strcmp(s, "foo bar baz quux"));
  32 /* check for newline handling */
  33 assert (a == b
  34         || c == d);
  35 ], gas_cv_assert_ok=yes, gas_cv_assert_ok=no))dnl
  36 AC_MSG_RESULT($gas_cv_assert_ok)
  37 test $gas_cv_assert_ok = yes || AC_DEFINE(BROKEN_ASSERT, 1, [assert broken?])
  38 ])dnl
  39 dnl
  40 dnl Since many Bourne shell implementations lack subroutines, use this
  41 dnl hack to simplify the code in configure.ac.
  42 dnl GAS_UNIQ(listvar)
  43 AC_DEFUN([GAS_UNIQ],
  44 [_gas_uniq_list="[$]$1"
  45 _gas_uniq_newlist=""
  46 dnl Protect against empty input list.
  47 for _gas_uniq_i in _gas_uniq_dummy [$]_gas_uniq_list ; do
  48   case [$]_gas_uniq_i in
  49   _gas_uniq_dummy) ;;
  50   *) case " [$]_gas_uniq_newlist " in
  51        *" [$]_gas_uniq_i "*) ;;
  52        *) _gas_uniq_newlist="[$]_gas_uniq_newlist [$]_gas_uniq_i" ;;
  53      esac ;;
  54   esac
  55 done
  56 $1=[$]_gas_uniq_newlist
  57 ])dnl
  58 dnl
  59 dnl Check for existence of member $2 in type $1 in time.h
  60 dnl
  61 AC_DEFUN([GAS_HAVE_TIME_TYPE_MEMBER],
  62 [AC_MSG_CHECKING([for $1.$2 in time.h])
  63  AC_CACHE_VAL(gas_cv_have_time_type_member_$2,
  64    [AC_TRY_COMPILE([
  65 #define _BSD_SOURCE 1
  66 #include <time.h>],
  67       [$1 avar; void* aref = (void*) &avar.$2],
  68       gas_cv_have_time_type_member_$2=yes,
  69       gas_cv_have_time_type_member_$2=no
  70    )])
  71  if test $gas_cv_have_time_type_member_$2 = yes; then
  72    AC_DEFINE([HAVE_]translit($2, [a-z], [A-Z]), 1,
  73              [Define if <time.h> has $1.$2.])
  74  fi
  75  AC_MSG_RESULT($gas_cv_have_time_type_member_$2)
  76 ])dnl
  77 dnl
  78 dnl Check for existence of member $2.$3 in type $1 in sys/stat.h
  79 dnl
  80 AC_DEFUN([GAS_HAVE_SYS_STAT_TYPE_MEMBER],
  81 [AC_MSG_CHECKING([for $1.$2.$3 in sys/stat.h])
  82  AC_CACHE_VAL(gas_cv_have_sys_stat_type_member_$2_$3,
  83    [AC_TRY_COMPILE([
  84 #define _BSD_SOURCE 1
  85 #include <sys/stat.h>],
  86       [$1 avar; void* aref = (void*) &avar.$2.$3],
  87       gas_cv_have_sys_stat_type_member_$2_$3=yes,
  88       gas_cv_have_sys_stat_type_member_$2_$3=no
  89    )])
  90  if test $gas_cv_have_sys_stat_type_member_$2_$3 = yes; then
  91    AC_DEFINE([HAVE_]translit($2, [a-z], [A-Z])[_]translit($3, [a-z], [A-Z]), 1,
  92              [Define if <sys/stat.h> has $1.$2.$3])
  93  fi
  94  AC_MSG_RESULT($gas_cv_have_sys_stat_type_member_$2_$3)
  95 ])dnl