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# cmake/modules/test_diff.cmake
#
# Copyright (C) 2018 Alan W. Irwin
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; version 2 of the License.
#
# PLplot is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with the file PLplot; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# Module for determining everything required to enable the test_diff.sh script
# that is used to test whether the various language bindings produce the
# same results as the C language for a specified test device.
set(PLPLOT_TEST_DEVICE svg CACHE STRING "noninteractive device used for difference report generated by test_diff.sh")
set(TEST_DIFF)
foreach(DRIVERS_DEVICE ${DRIVERS_DEVICE_LIST})
string(REGEX REPLACE "^(.*):.*:.*:.*:.*$" "\\1" DEVICE ${DRIVERS_DEVICE})
if(PLD_${DEVICE})
string(REGEX REPLACE "^.*:(.*):.*:.*:.*$" "\\1" DRIVER ${DRIVERS_DEVICE})
string(REGEX REPLACE "^.*:.*:.*:(.*):.*$" "\\1" KIND ${DRIVERS_DEVICE})
string(REGEX REPLACE "^.*:.*:.*:.*:(.*)$" "\\1" REQUIRE_FAMILYING ${DRIVERS_DEVICE})
if(KIND STREQUAL "F")
if(PLPLOT_TEST_DEVICE STREQUAL ${DEVICE})
if(ENABLE_DYNDRIVERS)
set(PLPLOT_TEST_TARGET PLPLOT::${DRIVER})
else(ENABLE_DYNDRIVERS)
set(PLPLOT_TEST_TARGET PLPLOT:plplot)
endif(ENABLE_DYNDRIVERS)
set(TEST_DIFF ON)
if(REQUIRE_FAMILYING)
set(FAMILIED_PLPLOT_TEST_DEVICE "yes")
set(FAMILIED_FIRST_PAGE "01")
endif(REQUIRE_FAMILYING)
endif(PLPLOT_TEST_DEVICE STREQUAL ${DEVICE})
endif(KIND STREQUAL "F")
endif(PLD_${DEVICE})
endforeach(DRIVERS_DEVICE ${DRIVERS_DEVICE_LIST})
if(TEST_DIFF)
message(STATUS "PLPLOT_TEST_DEVICE = ${PLPLOT_TEST_DEVICE}")
message(STATUS "PLPLOT_TEST_TARGET = ${PLPLOT_TEST_TARGET}")
message(STATUS "FAMILIED_PLPLOT_TEST_DEVICE = ${FAMILIED_PLPLOT_TEST_DEVICE}")
else(TEST_DIFF)
message(STATUS "WARNING: the PLPLOT_TEST_DEVICE = ${PLPLOT_TEST_DEVICE} is not enabled or is not a file device so plot difference report is disabled.")
endif(TEST_DIFF)
# Unconditionally find diff and tail which are used in the test_diff.sh script but may
# also be used elsewhere.
find_program(DIFF_EXECUTABLE diff)
find_program(TAIL_EXECUTABLE tail)
# On Linux also find cmp which is faster than diff. N.B. other Unix
# systems may have a POSIX-compliant cmp but without the GNU extension
# available on Linux of the -i option which we use to skip the
# datestamp on certain PostScript plot files that are compared in
# test_diff.sh.
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
find_program(CMP_EXECUTABLE cmp)
if(CMP_EXECUTABLE)
set(HAVE_CMP_I ON)
endif(CMP_EXECUTABLE)
endif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
if(TEST_DIFF AND NOT (CMP_EXECUTABLE OR (DIFF_EXECUTABLE AND TAIL_EXECUTABLE)))
message(STATUS "WARNING: cmp or both of diff and tail are not available on this platform so plot difference report is disabled.")
set(TEST_DIFF)
endif(TEST_DIFF AND NOT (CMP_EXECUTABLE OR (DIFF_EXECUTABLE AND TAIL_EXECUTABLE)))
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