CMake/Source/Modules/FindLibUV.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names and years are hard to maintain and often out-of-date or plain wrong.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

122 lines
3.8 KiB
CMake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindLibUV
---------
Find libuv includes and library.
Imported Targets
^^^^^^^^^^^^^^^^
An :ref:`imported target <Imported targets>` named
``LibUV::LibUV`` is provided if libuv has been found.
Result Variables
^^^^^^^^^^^^^^^^
This module defines the following variables:
``LibUV_FOUND``
True if libuv was found, false otherwise.
``LibUV_INCLUDE_DIRS``
Include directories needed to include libuv headers.
``LibUV_LIBRARIES``
Libraries needed to link to libuv.
``LibUV_VERSION``
The version of libuv found.
``LibUV_VERSION_MAJOR``
The major version of libuv.
``LibUV_VERSION_MINOR``
The minor version of libuv.
``LibUV_VERSION_PATCH``
The patch version of libuv.
Cache Variables
^^^^^^^^^^^^^^^
This module uses the following cache variables:
``LibUV_LIBRARY``
The location of the libuv library file.
``LibUV_INCLUDE_DIR``
The location of the libuv include directory containing ``uv.h``.
The cache variables should not be used by project code.
They may be set by end users to point at libuv components.
#]=======================================================================]
#-----------------------------------------------------------------------------
find_library(LibUV_LIBRARY
NAMES uv
)
mark_as_advanced(LibUV_LIBRARY)
find_path(LibUV_INCLUDE_DIR
NAMES uv.h
)
mark_as_advanced(LibUV_INCLUDE_DIR)
#-----------------------------------------------------------------------------
# Extract version number if possible.
set(_LibUV_H_REGEX "#[ \t]*define[ \t]+UV_VERSION_(MAJOR|MINOR|PATCH)[ \t]+[0-9]+")
if(LibUV_INCLUDE_DIR AND EXISTS "${LibUV_INCLUDE_DIR}/uv-version.h")
file(STRINGS "${LibUV_INCLUDE_DIR}/uv-version.h" _LibUV_H REGEX "${_LibUV_H_REGEX}")
elseif(LibUV_INCLUDE_DIR AND EXISTS "${LibUV_INCLUDE_DIR}/uv.h")
file(STRINGS "${LibUV_INCLUDE_DIR}/uv.h" _LibUV_H REGEX "${_LibUV_H_REGEX}")
else()
set(_LibUV_H "")
endif()
foreach(c MAJOR MINOR PATCH)
if(_LibUV_H MATCHES "#[ \t]*define[ \t]+UV_VERSION_${c}[ \t]+([0-9]+)")
set(_LibUV_VERSION_${c} "${CMAKE_MATCH_1}")
else()
unset(_LibUV_VERSION_${c})
endif()
endforeach()
if(DEFINED _LibUV_VERSION_MAJOR AND DEFINED _LibUV_VERSION_MINOR)
set(LibUV_VERSION_MAJOR "${_LibUV_VERSION_MAJOR}")
set(LibUV_VERSION_MINOR "${_LibUV_VERSION_MINOR}")
set(LibUV_VERSION "${LibUV_VERSION_MAJOR}.${LibUV_VERSION_MINOR}")
if(DEFINED _LibUV_VERSION_PATCH)
set(LibUV_VERSION_PATCH "${_LibUV_VERSION_PATCH}")
set(LibUV_VERSION "${LibUV_VERSION}.${LibUV_VERSION_PATCH}")
else()
unset(LibUV_VERSION_PATCH)
endif()
else()
set(LibUV_VERSION_MAJOR "")
set(LibUV_VERSION_MINOR "")
set(LibUV_VERSION_PATCH "")
set(LibUV_VERSION "")
endif()
unset(_LibUV_VERSION_MAJOR)
unset(_LibUV_VERSION_MINOR)
unset(_LibUV_VERSION_PATCH)
unset(_LibUV_H_REGEX)
unset(_LibUV_H)
#-----------------------------------------------------------------------------
include(${CMAKE_CURRENT_LIST_DIR}/../../Modules/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibUV
FOUND_VAR LibUV_FOUND
REQUIRED_VARS LibUV_LIBRARY LibUV_INCLUDE_DIR
VERSION_VAR LibUV_VERSION
)
set(LIBUV_FOUND ${LibUV_FOUND})
#-----------------------------------------------------------------------------
# Provide documented result variables and targets.
if(LibUV_FOUND)
set(LibUV_INCLUDE_DIRS ${LibUV_INCLUDE_DIR})
set(LibUV_LIBRARIES ${LibUV_LIBRARY})
if(NOT TARGET LibUV::LibUV)
add_library(LibUV::LibUV UNKNOWN IMPORTED)
set_target_properties(LibUV::LibUV PROPERTIES
IMPORTED_LOCATION "${LibUV_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${LibUV_INCLUDE_DIRS}"
)
endif()
endif()