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names and years are hard to maintain and often out-of-date or plain wrong.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

65 lines
1.8 KiB
CMake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindGnuTLS
# ----------
#
# Try to find the GNU Transport Layer Security library (gnutls)
#
#
#
# Once done this will define
#
# ::
#
# GNUTLS_FOUND - System has gnutls
# GNUTLS_INCLUDE_DIR - The gnutls include directory
# GNUTLS_LIBRARIES - The libraries needed to use gnutls
# GNUTLS_DEFINITIONS - Compiler switches required for using gnutls
# Note that this doesn't try to find the gnutls-extra package.
if (GNUTLS_INCLUDE_DIR AND GNUTLS_LIBRARY)
# in cache already
set(gnutls_FIND_QUIETLY TRUE)
endif ()
if (NOT WIN32)
# try using pkg-config to get the directories and then use these values
# in the find_path() and find_library() calls
# also fills in GNUTLS_DEFINITIONS, although that isn't normally useful
find_package(PkgConfig QUIET)
PKG_CHECK_MODULES(PC_GNUTLS QUIET gnutls)
set(GNUTLS_DEFINITIONS ${PC_GNUTLS_CFLAGS_OTHER})
set(GNUTLS_VERSION_STRING ${PC_GNUTLS_VERSION})
endif ()
find_path(GNUTLS_INCLUDE_DIR gnutls/gnutls.h
HINTS
${PC_GNUTLS_INCLUDEDIR}
${PC_GNUTLS_INCLUDE_DIRS}
)
find_library(GNUTLS_LIBRARY NAMES gnutls libgnutls
HINTS
${PC_GNUTLS_LIBDIR}
${PC_GNUTLS_LIBRARY_DIRS}
)
mark_as_advanced(GNUTLS_INCLUDE_DIR GNUTLS_LIBRARY)
# handle the QUIETLY and REQUIRED arguments and set GNUTLS_FOUND to TRUE if
# all listed variables are TRUE
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(GnuTLS
REQUIRED_VARS GNUTLS_LIBRARY GNUTLS_INCLUDE_DIR
VERSION_VAR GNUTLS_VERSION_STRING)
if(GNUTLS_FOUND)
set(GNUTLS_LIBRARIES ${GNUTLS_LIBRARY})
set(GNUTLS_INCLUDE_DIRS ${GNUTLS_INCLUDE_DIR})
endif()