/usr/include/simgear/simgear_config.h is in libsimgear-dev 3.0.0-6+b2.
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 19 | #define HAVE_SYS_TIME_H
#define HAVE_SYS_TIMEB_H
#define HAVE_UNISTD_H
#define HAVE_GETTIMEOFDAY
/* #undef HAVE_GETLOCALTIME */
#define HAVE_FTIME
/* #undef HAVE_RINT */
#define HAVE_TIMEGM
/* #undef HAVE_ISNAN */
/* #undef HAVE_STD_ISNAN */
/* #undef HAVE_WINDOWS_H */
#define HAVE_MKDTEMP
#define GCC_ATOMIC_BUILTINS_FOUND
#define SYSTEM_EXPAT
#define ENABLE_SOUND
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