/usr/include/cxxtools/config.h is in libcxxtools-dev 2.2.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | /** defines, how to implement atomic operations */
#define CXXTOOLS_ATOMICITY_GCC_X86_64
/** defines, whether c++ locales are supported */
#define CXXTOOLS_WITH_STD_LOCALE
/** defines, whether type long long exists */
#define HAVE_LONG_LONG
/** defines, whether type unsigned long long exists */
#define HAVE_UNSIGNED_LONG_LONG
/* defined if std::reverse_iterator<Iterator> is defined */
#define HAVE_REVERSE_ITERATOR
/* defined if std::reverse_iterator<Iterator, Difference, Value, Pointer,
Reference> is defined */
#define NO_REVERSE_ITERATOR_4
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