/usr/share/cmake-2.8/Modules/FindBullet.cmake is in cmake-data 2.8.12.2-0ubuntu3.
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 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 | # - Try to find the Bullet physics engine
#
#  This module defines the following variables
#
#  BULLET_FOUND - Was bullet found
#  BULLET_INCLUDE_DIRS - the Bullet include directories
#  BULLET_LIBRARIES - Link to this, by default it includes
#                     all bullet components (Dynamics,
#                     Collision, LinearMath, & SoftBody)
#
#  This module accepts the following variables
#
#  BULLET_ROOT - Can be set to bullet install path or Windows build path
#
#=============================================================================
# Copyright 2009 Kitware, Inc.
# Copyright 2009 Philip Lowman <philip@yhbt.com>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
#  License text for the above reference.)
macro(_FIND_BULLET_LIBRARY _var)
  find_library(${_var}
     NAMES
        ${ARGN}
     HINTS
        ${BULLET_ROOT}
        ${BULLET_ROOT}/lib/Release
        ${BULLET_ROOT}/lib/Debug
        ${BULLET_ROOT}/out/release8/libs
        ${BULLET_ROOT}/out/debug8/libs
     PATH_SUFFIXES lib
  )
  mark_as_advanced(${_var})
endmacro()
macro(_BULLET_APPEND_LIBRARIES _list _release)
   set(_debug ${_release}_DEBUG)
   if(${_debug})
      set(${_list} ${${_list}} optimized ${${_release}} debug ${${_debug}})
   else()
      set(${_list} ${${_list}} ${${_release}})
   endif()
endmacro()
find_path(BULLET_INCLUDE_DIR NAMES btBulletCollisionCommon.h
  HINTS
    ${BULLET_ROOT}/include
    ${BULLET_ROOT}/src
  PATH_SUFFIXES bullet
)
# Find the libraries
_FIND_BULLET_LIBRARY(BULLET_DYNAMICS_LIBRARY        BulletDynamics)
_FIND_BULLET_LIBRARY(BULLET_DYNAMICS_LIBRARY_DEBUG  BulletDynamics_Debug BulletDynamics_d)
_FIND_BULLET_LIBRARY(BULLET_COLLISION_LIBRARY       BulletCollision)
_FIND_BULLET_LIBRARY(BULLET_COLLISION_LIBRARY_DEBUG BulletCollision_Debug BulletCollision_d)
_FIND_BULLET_LIBRARY(BULLET_MATH_LIBRARY            BulletMath LinearMath)
_FIND_BULLET_LIBRARY(BULLET_MATH_LIBRARY_DEBUG      BulletMath_Debug BulletMath_d LinearMath_Debug LinearMath_d)
_FIND_BULLET_LIBRARY(BULLET_SOFTBODY_LIBRARY        BulletSoftBody)
_FIND_BULLET_LIBRARY(BULLET_SOFTBODY_LIBRARY_DEBUG  BulletSoftBody_Debug BulletSoftBody_d)
# handle the QUIETLY and REQUIRED arguments and set BULLET_FOUND to TRUE if
# all listed variables are TRUE
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Bullet DEFAULT_MSG
    BULLET_DYNAMICS_LIBRARY BULLET_COLLISION_LIBRARY BULLET_MATH_LIBRARY
    BULLET_SOFTBODY_LIBRARY BULLET_INCLUDE_DIR)
set(BULLET_INCLUDE_DIRS ${BULLET_INCLUDE_DIR})
if(BULLET_FOUND)
   _BULLET_APPEND_LIBRARIES(BULLET_LIBRARIES BULLET_DYNAMICS_LIBRARY)
   _BULLET_APPEND_LIBRARIES(BULLET_LIBRARIES BULLET_COLLISION_LIBRARY)
   _BULLET_APPEND_LIBRARIES(BULLET_LIBRARIES BULLET_MATH_LIBRARY)
   _BULLET_APPEND_LIBRARIES(BULLET_LIBRARIES BULLET_SOFTBODY_LIBRARY)
endif()
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