CMake/Modules/CMakeFindBinUtils.cmake
Brad King 86578eccf2 Simplify CMake per-source license notices
Per-source copyright/license notice headers that spell out copyright holder
names and years are hard to maintain and often out-of-date or plain wrong.
Precise contributor information is already maintained automatically by the
version control tool.  Ultimately it is the receiver of a file who is
responsible for determining its licensing status, and per-source notices are
merely a convenience.  Therefore it is simpler and more accurate for
each source to have a generic notice of the license name and references to
more detailed information on copyright holders and full license terms.

Our `Copyright.txt` file now contains a list of Contributors whose names
appeared source-level copyright notices.  It also references version control
history for more precise information.  Therefore we no longer need to spell
out the list of Contributors in each source file notice.

Replace CMake per-source copyright/license notice headers with a short
description of the license and links to `Copyright.txt` and online information
available from "https://cmake.org/licensing".  The online URL also handles
cases of modules being copied out of our source into other projects, so we
can drop our notices about replacing links with full license text.

Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority
of the replacements mechanically.  Manually fix up shebang lines and trailing
newlines in a few files.  Manually update the notices in a few files that the
script does not handle.
2016-09-27 15:14:44 -04:00

69 lines
2.8 KiB
CMake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
# search for additional tools required for C/C++ (and other languages ?)
#
# If the internal cmake variable _CMAKE_TOOLCHAIN_PREFIX is set, this is used
# as prefix for the tools (e.g. arm-elf-gcc etc.)
# If the cmake variable _CMAKE_TOOLCHAIN_LOCATION is set, the compiler is
# searched only there. The other tools are at first searched there, then
# also in the default locations.
#
# Sets the following variables:
# CMAKE_AR
# CMAKE_RANLIB
# CMAKE_LINKER
# CMAKE_STRIP
# CMAKE_INSTALL_NAME_TOOL
# on UNIX, cygwin and mingw
# if it's the MS C/CXX compiler, search for link
if("x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC"
OR "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC"
OR "x${CMAKE_Fortran_SIMULATE_ID}" STREQUAL "xMSVC"
OR "x${CMAKE_C_COMPILER_ID}" STREQUAL "xMSVC"
OR "x${CMAKE_CXX_COMPILER_ID}" STREQUAL "xMSVC"
OR (CMAKE_GENERATOR MATCHES "Visual Studio"
AND NOT CMAKE_VS_PLATFORM_NAME STREQUAL "Tegra-Android"))
find_program(CMAKE_LINKER NAMES link HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
mark_as_advanced(CMAKE_LINKER)
# in all other cases search for ar, ranlib, etc.
else()
if(CMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN)
set(_CMAKE_TOOLCHAIN_LOCATION ${_CMAKE_TOOLCHAIN_LOCATION} ${CMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN}/bin)
endif()
if(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN)
set(_CMAKE_TOOLCHAIN_LOCATION ${_CMAKE_TOOLCHAIN_LOCATION} ${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}/bin)
endif()
find_program(CMAKE_AR NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ar${_CMAKE_TOOLCHAIN_SUFFIX} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
find_program(CMAKE_RANLIB NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ranlib HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
if(NOT CMAKE_RANLIB)
set(CMAKE_RANLIB : CACHE INTERNAL "noop for ranlib")
endif()
find_program(CMAKE_STRIP NAMES ${_CMAKE_TOOLCHAIN_PREFIX}strip${_CMAKE_TOOLCHAIN_SUFFIX} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
find_program(CMAKE_LINKER NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ld HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
find_program(CMAKE_NM NAMES ${_CMAKE_TOOLCHAIN_PREFIX}nm HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
find_program(CMAKE_OBJDUMP NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objdump HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
find_program(CMAKE_OBJCOPY NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objcopy HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
mark_as_advanced(CMAKE_AR CMAKE_RANLIB CMAKE_STRIP CMAKE_LINKER CMAKE_NM CMAKE_OBJDUMP CMAKE_OBJCOPY)
endif()
if(CMAKE_PLATFORM_HAS_INSTALLNAME)
find_program(CMAKE_INSTALL_NAME_TOOL NAMES install_name_tool HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
if(NOT CMAKE_INSTALL_NAME_TOOL)
message(FATAL_ERROR "Could not find install_name_tool, please check your installation.")
endif()
mark_as_advanced(CMAKE_INSTALL_NAME_TOOL)
endif()