Description: Fix errors with CMake 3.12 for get_target_property commands.
Author: Bas Couwenberg <sebastic@debian.org>
Bug: https://github.com/mapserver/mapserver/issues/5646
Bug-Debian: https://bugs.debian.org/906605

--- a/mapscript/java/CMakeLists.txt
+++ b/mapscript/java/CMakeLists.txt
@@ -42,6 +42,14 @@ ADD_CUSTOM_COMMAND(TARGET javamapscript
                       COMMENT "Compiling java source files, creating mapscript.jar"
                       )
 
+# Workaround for CMake 3.12 error:
+#
+# The LOCATION property may not be read from target "foo".  Use
+# the target name directly with add_custom_command, or use the generator
+#  expression $<TARGET_FILE>, as appropriate.
+
+cmake_policy(SET CMP0026 OLD)
+
 get_target_property(LOC_MAPSCRIPT_LIB ${SWIG_MODULE_javamapscript_REAL_NAME} LOCATION)
 install(FILES ${LOC_MAPSCRIPT_LIB} DESTINATION lib/jni)
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/mapscript.jar DESTINATION share/java)
--- a/mapscript/perl/CMakeLists.txt
+++ b/mapscript/perl/CMakeLists.txt
@@ -18,6 +18,14 @@ if(APPLE)
   set_target_properties(perlmapscript PROPERTIES SUFFIX ".bundle")
 endif(APPLE)
 
+# Workaround for CMake 3.12 error:
+#
+# The LOCATION property may not be read from target "foo".  Use
+# the target name directly with add_custom_command, or use the generator
+#  expression $<TARGET_FILE>, as appropriate.
+
+cmake_policy(SET CMP0026 OLD)
+
 get_target_property(LOC_MAPSCRIPT_LIB ${SWIG_MODULE_perlmapscript_REAL_NAME} LOCATION)
 set(mapscript_files ${LOC_MAPSCRIPT_LIB} ${CMAKE_CURRENT_BINARY_DIR}/mapscript.pm)
 install(FILES ${LOC_MAPSCRIPT_LIB} DESTINATION ${CUSTOM_PERL_VENDOR_ARCH_DIR}/auto/mapscript)
--- a/mapscript/python/CMakeLists.txt
+++ b/mapscript/python/CMakeLists.txt
@@ -39,6 +39,14 @@ set_target_properties(${SWIG_MODULE_pyth
 
 execute_process ( COMMAND ${PYTHON_EXECUTABLE} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(True))" OUTPUT_VARIABLE PYTHON_SITE_PACKAGES OUTPUT_STRIP_TRAILING_WHITESPACE)
 
+# Workaround for CMake 3.12 error:
+#
+# The LOCATION property may not be read from target "foo".  Use
+# the target name directly with add_custom_command, or use the generator
+#  expression $<TARGET_FILE>, as appropriate.
+
+cmake_policy(SET CMP0026 OLD)
+
 get_target_property(LOC_MAPSCRIPT_LIB ${SWIG_MODULE_pythonmapscript_REAL_NAME} LOCATION)
 set(mapscript_files ${LOC_MAPSCRIPT_LIB} ${CMAKE_CURRENT_BINARY_DIR}/mapscript.py)
 install(FILES ${mapscript_files} DESTINATION ${PYTHON_SITE_PACKAGES})
--- a/mapscript/ruby/CMakeLists.txt
+++ b/mapscript/ruby/CMakeLists.txt
@@ -32,6 +32,14 @@ if(APPLE)
   set_target_properties(${SWIG_MODULE_rubymapscript_REAL_NAME} PROPERTIES SUFFIX ".bundle")
 endif(APPLE)
 
+# Workaround for CMake 3.12 error:
+#
+# The LOCATION property may not be read from target "foo".  Use
+# the target name directly with add_custom_command, or use the generator
+#  expression $<TARGET_FILE>, as appropriate.
+
+cmake_policy(SET CMP0026 OLD)
+
 get_target_property(LOC_MAPSCRIPT_LIB ${SWIG_MODULE_rubymapscript_REAL_NAME} LOCATION)
 execute_process(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "puts RbConfig::CONFIG['vendorarchdir']" OUTPUT_VARIABLE RUBY_VENDORARCHDIR OUTPUT_STRIP_TRAILING_WHITESPACE)
 install(FILES ${LOC_MAPSCRIPT_LIB} DESTINATION ${RUBY_VENDORARCHDIR})