| /* btest.c -- Filename header for libbacktrace library | 
 |    Copyright (C) 2012-2018 Free Software Foundation, Inc. | 
 |    Written by Ian Lance Taylor, Google. | 
 |  | 
 | Redistribution and use in source and binary forms, with or without | 
 | modification, are permitted provided that the following conditions are | 
 | met: | 
 |  | 
 |     (1) Redistributions of source code must retain the above copyright | 
 |     notice, this list of conditions and the following disclaimer. | 
 |  | 
 |     (2) Redistributions in binary form must reproduce the above copyright | 
 |     notice, this list of conditions and the following disclaimer in | 
 |     the documentation and/or other materials provided with the | 
 |     distribution. | 
 |  | 
 |     (3) The name of the author may not be used to | 
 |     endorse or promote products derived from this software without | 
 |     specific prior written permission. | 
 |  | 
 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | 
 | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | 
 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | 
 | DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | 
 | INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | 
 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | 
 | SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | 
 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | 
 | STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | 
 | IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | 
 | POSSIBILITY OF SUCH DAMAGE.  */ | 
 |  | 
 | #ifndef GCC_VERSION | 
 | # define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) | 
 | #endif | 
 |  | 
 | #if (GCC_VERSION < 2007) | 
 | # define __attribute__(x) | 
 | #endif | 
 |  | 
 | #ifndef ATTRIBUTE_UNUSED | 
 | # define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) | 
 | #endif | 
 |  | 
 | #if defined(__MSDOS__) || defined(_WIN32) || defined(__OS2__) || defined (__CYGWIN__) | 
 | # define IS_DIR_SEPARATOR(c) ((c) == '/' || (c) == '\\') | 
 | #else | 
 | # define IS_DIR_SEPARATOR(c) ((c) == '/') | 
 | #endif |