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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindGnuplot
# -----------
#
# this module looks for gnuplot
#
#
#
# Once done this will define
#
# ::
#
# GNUPLOT_FOUND - system has Gnuplot
# GNUPLOT_EXECUTABLE - the Gnuplot executable
# GNUPLOT_VERSION_STRING - the version of Gnuplot found (since CMake 2.8.8)
#
#
#
# GNUPLOT_VERSION_STRING will not work for old versions like 3.7.1.
include(${CMAKE_CURRENT_LIST_DIR}/FindCygwin.cmake)
find_program(GNUPLOT_EXECUTABLE
NAMES
gnuplot
pgnuplot
wgnupl32
PATHS
${CYGWIN_INSTALL_PATH}/bin
)
if (GNUPLOT_EXECUTABLE)
execute_process(COMMAND "${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 ${GNUPLOT_EXECUTABLE})
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Gnuplot
REQUIRED_VARS GNUPLOT_EXECUTABLE
VERSION_VAR GNUPLOT_VERSION_STRING)
mark_as_advanced( GNUPLOT_EXECUTABLE )
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