/usr/lib/cmake/DLRestrictions/dlrestrictions-symbol.c.cmake is in libdlrestrictions-dev 0.15.28ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | #include <dlrestrictions.h>
DLR_EXPORT_SYMBOL("@dlr_expression@");
|