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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file LICENSE.rst or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindGnuplot
-----------
Finds the Gnuplot command-line graphing utility for generating two- and
three-dimensional plots (``gnuplot``).
Result Variables
^^^^^^^^^^^^^^^^
This module sets the following variables:
``Gnuplot_FOUND``
Boolean indicating whether Gnuplot has been found. For backward
compatibility, the ``GNUPLOT_FOUND`` variable is also set to the same value.
``GNUPLOT_VERSION_STRING``
The version of Gnuplot found.
.. note::
Version detection is available only for Gnuplot 4 and later. Earlier
versions did not provide version output.
Cache Variables
^^^^^^^^^^^^^^^
The following cache variables may also be set:
``GNUPLOT_EXECUTABLE``
Absolute path to the ``gnuplot`` executable.
Examples
^^^^^^^^
Finding Gnuplot:
.. code-block:: cmake
find_package(Gnuplot)
#]=======================================================================]
include(${CMAKE_CURRENT_LIST_DIR}/FindCygwin.cmake)
include(${CMAKE_CURRENT_LIST_DIR}/FindMsys.cmake)
find_program(GNUPLOT_EXECUTABLE
NAMES
gnuplot
pgnuplot
wgnupl32
PATHS
${CYGWIN_INSTALL_PATH}/bin
${MSYS_INSTALL_PATH}/usr/bin
)
if (GNUPLOT_EXECUTABLE)
execute_process(COMMAND "${GNUPLOT_EXECUTABLE}" --version
OUTPUT_VARIABLE GNUPLOT_OUTPUT_VARIABLE
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REGEX REPLACE "^gnuplot ([0-9\\.]+)( patchlevel )?" "\\1." GNUPLOT_VERSION_STRING "${GNUPLOT_OUTPUT_VARIABLE}")
string(REGEX REPLACE "\\.$" "" GNUPLOT_VERSION_STRING "${GNUPLOT_VERSION_STRING}")
unset(GNUPLOT_OUTPUT_VARIABLE)
endif()
# for compatibility
set(GNUPLOT ${GNUPLOT_EXECUTABLE})
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Gnuplot
REQUIRED_VARS GNUPLOT_EXECUTABLE
VERSION_VAR GNUPLOT_VERSION_STRING)
mark_as_advanced( GNUPLOT_EXECUTABLE )
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