/usr/lib/CGAL/FindESBTL.cmake is in libcgal-dev 4.2-5ubuntu1.
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 20 21 22 23 24 25 26 27 28 29 30 31 | #This modules tries to find ESBTL
# Once done this will define
#
#  ESBTL_FOUND - system has ESBTL
#  ESBTL_INCLUDE_DIR - ESBTL include directory
#
# Is it already configured?
if (ESBTL_INCLUDE_DIR)
  set(ESBTL_FOUND TRUE)
else()
  find_path(ESBTL_INCLUDE_DIR
            NAMES ESBTL/default.h
            HINTS ENV ESBTL_INC_DIR
                  ENV ESBTL_DIR
                  /usr/include
                  /usr/local/include
            PATH_SUFFIXES include
            DOC "The directory containing the ESBTL header files WITHOUT the ESBTL prefix"
           )
  if(ESBTL_INCLUDE_DIR)
     set(ESBTL_FOUND TRUE)
  endif()
endif()
if(ESBTL_FOUND)
    message(STATUS "Found ESBTL: ${ESBTL_INCLUDE_DIR}")
endif()
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