nexmon – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | # Check for stdbool.h that conforms to C99. |
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3 | dnl Copyright (C) 2002-2006, 2009-2011 Free Software Foundation, Inc. |
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4 | dnl This file is free software; the Free Software Foundation |
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5 | dnl gives unlimited permission to copy and/or distribute it, |
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6 | dnl with or without modifications, as long as this notice is preserved. |
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7 | |||
8 | #serial 5 |
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9 | |||
10 | # Prepare for substituting <stdbool.h> if it is not supported. |
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11 | |||
12 | AC_DEFUN([AM_STDBOOL_H], |
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13 | [ |
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14 | AC_REQUIRE([AC_CHECK_HEADER_STDBOOL]) |
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15 | |||
16 | # Define two additional variables used in the Makefile substitution. |
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17 | |||
18 | if test "$ac_cv_header_stdbool_h" = yes; then |
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19 | STDBOOL_H='' |
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20 | else |
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21 | STDBOOL_H='stdbool.h' |
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22 | fi |
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23 | AC_SUBST([STDBOOL_H]) |
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24 | AM_CONDITIONAL([GL_GENERATE_STDBOOL_H], [test -n "$STDBOOL_H"]) |
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25 | |||
26 | if test "$ac_cv_type__Bool" = yes; then |
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27 | HAVE__BOOL=1 |
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28 | else |
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29 | HAVE__BOOL=0 |
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30 | fi |
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31 | AC_SUBST([HAVE__BOOL]) |
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32 | ]) |
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33 | |||
34 | # AM_STDBOOL_H will be renamed to gl_STDBOOL_H in the future. |
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35 | AC_DEFUN([gl_STDBOOL_H], [AM_STDBOOL_H]) |
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36 | |||
37 | # This version of the macro is needed in autoconf <= 2.68. |
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38 | |||
39 | AC_DEFUN([AC_CHECK_HEADER_STDBOOL], |
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40 | [AC_CACHE_CHECK([for stdbool.h that conforms to C99], |
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41 | [ac_cv_header_stdbool_h], |
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42 | [AC_COMPILE_IFELSE( |
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43 | [AC_LANG_PROGRAM( |
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44 | [[ |
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45 | #include <stdbool.h> |
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46 | #ifndef bool |
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47 | "error: bool is not defined" |
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48 | #endif |
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49 | #ifndef false |
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50 | "error: false is not defined" |
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51 | #endif |
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52 | #if false |
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53 | "error: false is not 0" |
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54 | #endif |
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55 | #ifndef true |
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56 | "error: true is not defined" |
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57 | #endif |
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58 | #if true != 1 |
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59 | "error: true is not 1" |
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60 | #endif |
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61 | #ifndef __bool_true_false_are_defined |
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62 | "error: __bool_true_false_are_defined is not defined" |
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63 | #endif |
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64 | |||
65 | struct s { _Bool s: 1; _Bool t; } s; |
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66 | |||
67 | char a[true == 1 ? 1 : -1]; |
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68 | char b[false == 0 ? 1 : -1]; |
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69 | char c[__bool_true_false_are_defined == 1 ? 1 : -1]; |
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70 | char d[(bool) 0.5 == true ? 1 : -1]; |
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71 | /* See body of main program for 'e'. */ |
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72 | char f[(_Bool) 0.0 == false ? 1 : -1]; |
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73 | char g[true]; |
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74 | char h[sizeof (_Bool)]; |
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75 | char i[sizeof s.t]; |
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76 | enum { j = false, k = true, l = false * true, m = true * 256 }; |
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77 | /* The following fails for |
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78 | HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */ |
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79 | _Bool n[m]; |
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80 | char o[sizeof n == m * sizeof n[0] ? 1 : -1]; |
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81 | char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1]; |
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82 | /* Catch a bug in an HP-UX C compiler. See |
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83 | http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html |
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84 | http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html |
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85 | */ |
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86 | _Bool q = true; |
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87 | _Bool *pq = &q; |
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88 | ]], |
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89 | [[ |
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90 | bool e = &s; |
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91 | *pq |= q; |
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92 | *pq |= ! q; |
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93 | /* Refer to every declared value, to avoid compiler optimizations. */ |
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94 | return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l |
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95 | + !m + !n + !o + !p + !q + !pq); |
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96 | ]])], |
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97 | [ac_cv_header_stdbool_h=yes], |
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98 | [ac_cv_header_stdbool_h=no])]) |
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99 | AC_CHECK_TYPES([_Bool]) |
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100 | ]) |