1cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project# Check for stdbool.h that conforms to C99. 2cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 305436638acc7c010349a69c3395f1a57c642dc62Ying Wangdnl Copyright (C) 2002-2006, 2009-2012 Free Software Foundation, Inc. 4cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Projectdnl This file is free software; the Free Software Foundation 5cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Projectdnl gives unlimited permission to copy and/or distribute it, 6cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Projectdnl with or without modifications, as long as this notice is preserved. 7cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 805436638acc7c010349a69c3395f1a57c642dc62Ying Wang#serial 5 905436638acc7c010349a69c3395f1a57c642dc62Ying Wang 10cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project# Prepare for substituting <stdbool.h> if it is not supported. 11cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 12cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source ProjectAC_DEFUN([AM_STDBOOL_H], 13cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project[ 1405436638acc7c010349a69c3395f1a57c642dc62Ying Wang AC_REQUIRE([AC_CHECK_HEADER_STDBOOL]) 15cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 16cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project # Define two additional variables used in the Makefile substitution. 17cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 18cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project if test "$ac_cv_header_stdbool_h" = yes; then 19cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project STDBOOL_H='' 20cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project else 21cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project STDBOOL_H='stdbool.h' 22cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project fi 23cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project AC_SUBST([STDBOOL_H]) 2405436638acc7c010349a69c3395f1a57c642dc62Ying Wang AM_CONDITIONAL([GL_GENERATE_STDBOOL_H], [test -n "$STDBOOL_H"]) 25cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 26cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project if test "$ac_cv_type__Bool" = yes; then 27cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project HAVE__BOOL=1 28cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project else 29cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project HAVE__BOOL=0 30cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project fi 31cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project AC_SUBST([HAVE__BOOL]) 32cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project]) 33cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 34cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project# AM_STDBOOL_H will be renamed to gl_STDBOOL_H in the future. 35cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source ProjectAC_DEFUN([gl_STDBOOL_H], [AM_STDBOOL_H]) 36cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 3705436638acc7c010349a69c3395f1a57c642dc62Ying Wang# This version of the macro is needed in autoconf <= 2.68. 38cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 3905436638acc7c010349a69c3395f1a57c642dc62Ying WangAC_DEFUN([AC_CHECK_HEADER_STDBOOL], 40cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project [AC_CACHE_CHECK([for stdbool.h that conforms to C99], 41cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project [ac_cv_header_stdbool_h], 4205436638acc7c010349a69c3395f1a57c642dc62Ying Wang [AC_COMPILE_IFELSE( 4305436638acc7c010349a69c3395f1a57c642dc62Ying Wang [AC_LANG_PROGRAM( 4405436638acc7c010349a69c3395f1a57c642dc62Ying Wang [[ 4505436638acc7c010349a69c3395f1a57c642dc62Ying Wang #include <stdbool.h> 4605436638acc7c010349a69c3395f1a57c642dc62Ying Wang #ifndef bool 4705436638acc7c010349a69c3395f1a57c642dc62Ying Wang "error: bool is not defined" 4805436638acc7c010349a69c3395f1a57c642dc62Ying Wang #endif 4905436638acc7c010349a69c3395f1a57c642dc62Ying Wang #ifndef false 5005436638acc7c010349a69c3395f1a57c642dc62Ying Wang "error: false is not defined" 5105436638acc7c010349a69c3395f1a57c642dc62Ying Wang #endif 5205436638acc7c010349a69c3395f1a57c642dc62Ying Wang #if false 5305436638acc7c010349a69c3395f1a57c642dc62Ying Wang "error: false is not 0" 5405436638acc7c010349a69c3395f1a57c642dc62Ying Wang #endif 5505436638acc7c010349a69c3395f1a57c642dc62Ying Wang #ifndef true 5605436638acc7c010349a69c3395f1a57c642dc62Ying Wang "error: true is not defined" 5705436638acc7c010349a69c3395f1a57c642dc62Ying Wang #endif 5805436638acc7c010349a69c3395f1a57c642dc62Ying Wang #if true != 1 5905436638acc7c010349a69c3395f1a57c642dc62Ying Wang "error: true is not 1" 6005436638acc7c010349a69c3395f1a57c642dc62Ying Wang #endif 6105436638acc7c010349a69c3395f1a57c642dc62Ying Wang #ifndef __bool_true_false_are_defined 6205436638acc7c010349a69c3395f1a57c642dc62Ying Wang "error: __bool_true_false_are_defined is not defined" 6305436638acc7c010349a69c3395f1a57c642dc62Ying Wang #endif 64cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 6505436638acc7c010349a69c3395f1a57c642dc62Ying Wang struct s { _Bool s: 1; _Bool t; } s; 66cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 6705436638acc7c010349a69c3395f1a57c642dc62Ying Wang char a[true == 1 ? 1 : -1]; 6805436638acc7c010349a69c3395f1a57c642dc62Ying Wang char b[false == 0 ? 1 : -1]; 6905436638acc7c010349a69c3395f1a57c642dc62Ying Wang char c[__bool_true_false_are_defined == 1 ? 1 : -1]; 7005436638acc7c010349a69c3395f1a57c642dc62Ying Wang char d[(bool) 0.5 == true ? 1 : -1]; 7105436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* See body of main program for 'e'. */ 7205436638acc7c010349a69c3395f1a57c642dc62Ying Wang char f[(_Bool) 0.0 == false ? 1 : -1]; 7305436638acc7c010349a69c3395f1a57c642dc62Ying Wang char g[true]; 7405436638acc7c010349a69c3395f1a57c642dc62Ying Wang char h[sizeof (_Bool)]; 7505436638acc7c010349a69c3395f1a57c642dc62Ying Wang char i[sizeof s.t]; 7605436638acc7c010349a69c3395f1a57c642dc62Ying Wang enum { j = false, k = true, l = false * true, m = true * 256 }; 7705436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* The following fails for 7805436638acc7c010349a69c3395f1a57c642dc62Ying Wang HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */ 7905436638acc7c010349a69c3395f1a57c642dc62Ying Wang _Bool n[m]; 8005436638acc7c010349a69c3395f1a57c642dc62Ying Wang char o[sizeof n == m * sizeof n[0] ? 1 : -1]; 8105436638acc7c010349a69c3395f1a57c642dc62Ying Wang char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1]; 8205436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Catch a bug in an HP-UX C compiler. See 8305436638acc7c010349a69c3395f1a57c642dc62Ying Wang http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html 8405436638acc7c010349a69c3395f1a57c642dc62Ying Wang http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html 8505436638acc7c010349a69c3395f1a57c642dc62Ying Wang */ 8605436638acc7c010349a69c3395f1a57c642dc62Ying Wang _Bool q = true; 8705436638acc7c010349a69c3395f1a57c642dc62Ying Wang _Bool *pq = &q; 8805436638acc7c010349a69c3395f1a57c642dc62Ying Wang ]], 8905436638acc7c010349a69c3395f1a57c642dc62Ying Wang [[ 9005436638acc7c010349a69c3395f1a57c642dc62Ying Wang bool e = &s; 9105436638acc7c010349a69c3395f1a57c642dc62Ying Wang *pq |= q; 9205436638acc7c010349a69c3395f1a57c642dc62Ying Wang *pq |= ! q; 9305436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Refer to every declared value, to avoid compiler optimizations. */ 9405436638acc7c010349a69c3395f1a57c642dc62Ying Wang return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l 9505436638acc7c010349a69c3395f1a57c642dc62Ying Wang + !m + !n + !o + !p + !q + !pq); 9605436638acc7c010349a69c3395f1a57c642dc62Ying Wang ]])], 9705436638acc7c010349a69c3395f1a57c642dc62Ying Wang [ac_cv_header_stdbool_h=yes], 9805436638acc7c010349a69c3395f1a57c642dc62Ying Wang [ac_cv_header_stdbool_h=no])]) 99cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project AC_CHECK_TYPES([_Bool]) 10005436638acc7c010349a69c3395f1a57c642dc62Ying Wang]) 101