because of multiple python version link error build failed , so comment these cmake codes for now

april.diff

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7376b45..d7413d4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@ else()
     target_link_libraries(${PROJECT_NAME} Threads::Threads m)
 endif()
 
-set_target_properties(${PROJECT_NAME} PROPERTIES SOVERSION 3 VERSION 3.1.0)
+set_target_properties(${PROJECT_NAME} PROPERTIES SOVERSION 3 VERSION 3.1.0 C_STANDARD 11)
 
 include(GNUInstallDirs)
 target_include_directories(${PROJECT_NAME} PUBLIC
@@ -34,6 +34,7 @@ target_include_directories(${PROJECT_NAME} PUBLIC
 set_target_properties(${PROJECT_NAME} PROPERTIES
     ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_INSTALL_LIBDIR}
     LIBRARY_OUTPUT_DIRECTORY ${CMAKE_INSTALL_LIBDIR}
+    C_STANDARD 11
 )
 
 
@@ -79,14 +80,14 @@ add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/apriltag_${X}.docstring.h
     WORKING_DIRECTORY ${PROJECT_BINARY_DIR})
 endforeach()
 
-add_custom_command(OUTPUT apriltag_pywrap.o
-    COMMAND ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} ${PY_CFLAGS} -I${PROJECT_BINARY_DIR} -c -o apriltag_pywrap.o ${CMAKE_SOURCE_DIR}/apriltag_pywrap.c
-    DEPENDS ${CMAKE_SOURCE_DIR}/apriltag_pywrap.c ${PROJECT_BINARY_DIR}/apriltag_detect.docstring.h ${PROJECT_BINARY_DIR}/apriltag_py_type.docstring.h)
-add_custom_command(OUTPUT apriltag${PY_EXT_SUFFIX}
-    COMMAND ${PY_LINKER} ${PY_LDFLAGS} -Wl,-rpath=lib apriltag_pywrap.o ${LIB_APRILTAG_PATH}/libapriltag.so -o apriltag${PY_EXT_SUFFIX}
-    DEPENDS ${PROJECT_NAME} apriltag_pywrap.o)
-add_custom_target(apriltag_python ALL
-    DEPENDS apriltag${PY_EXT_SUFFIX})
+#add_custom_command(OUTPUT apriltag_pywrap.o
+#    COMMAND ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} ${PY_CFLAGS} -I${PROJECT_BINARY_DIR} -c -o #apriltag_pywrap.o ${CMAKE_SOURCE_DIR}/apriltag_pywrap.c
+#    DEPENDS ${CMAKE_SOURCE_DIR}/apriltag_pywrap.c ${PROJECT_BINARY_DIR}/apriltag_detect.docstring.h ${PROJECT_BINARY_DIR}/apriltag_py_type.docstring.h)
+#add_custom_command(OUTPUT apriltag${PY_EXT_SUFFIX}
+#    COMMAND ${PY_LINKER} ${PY_LDFLAGS} -Wl,-rpath=lib apriltag_pywrap.o ${LIB_APRILTAG_PATH}/libapriltag.so -o apriltag${PY_EXT_SUFFIX}
+#    DEPENDS ${PROJECT_NAME} apriltag_pywrap.o)
+#add_custom_target(apriltag_python ALL
+#    DEPENDS apriltag${PY_EXT_SUFFIX})
 
 execute_process(COMMAND python3 -m site --user-site OUTPUT_VARIABLE PY_DEST)
 string(STRIP ${PY_DEST} PY_DEST)
@@ -97,16 +98,16 @@ endif (NOT Python3_NOT_FOUND)
 
 # Examples
 # apriltag_demo
-add_executable(apriltag_demo example/apriltag_demo.c)
-target_link_libraries(apriltag_demo apriltag)
+#add_executable(apriltag_demo example/apriltag_demo.c)
+#target_link_libraries(apriltag_demo apriltag)
 
 # opencv_demo
-if(OpenCV_FOUND)
-    add_executable(opencv_demo example/opencv_demo.cc)
-    target_link_libraries(opencv_demo apriltag ${OpenCV_LIBRARIES})
-    install(TARGETS opencv_demo RUNTIME DESTINATION bin)
-endif(OpenCV_FOUND)
+#if(OpenCV_FOUND)
+#    add_executable(opencv_demo example/opencv_demo.cc)
+#    target_link_libraries(opencv_demo apriltag ${OpenCV_LIBRARIES})
+#    install(TARGETS opencv_demo RUNTIME DESTINATION bin)
+#endif(OpenCV_FOUND)
 
 # install example programs
-install(TARGETS apriltag_demo RUNTIME DESTINATION bin)
+#install(TARGETS apriltag_demo RUNTIME DESTINATION bin)
 
diff --git a/Makefile b/Makefile
index b368eff..917c0ed 100644
--- a/Makefile
+++ b/Makefile
@@ -1,40 +1,1098 @@
-PREFIX ?= /usr/local
+# CMAKE generated file: DO NOT EDIT!
+# Generated by "Unix Makefiles" Generator, CMake Version 3.10
 
-CC = gcc
-AR = ar
+# Default target executed when no arguments are given to make.
+default_target: all
 
-CFLAGS = -std=gnu99 -fPIC -Wall -Wno-unused-parameter -Wno-unused-function
-CFLAGS += -I. -O3 -fno-strict-overflow
+.PHONY : default_target
 
-APRILTAG_SRCS := $(shell ls *.c common/*.c)
-APRILTAG_HEADERS := $(shell ls *.h common/*.h)
-APRILTAG_OBJS := $(APRILTAG_SRCS:%.c=%.o)
-TARGETS := libapriltag.a libapriltag.so
+# Allow only one "make -f Makefile2" at a time, but pass parallelism.
+.NOTPARALLEL:
 
-.PHONY: all
-all: $(TARGETS)
-	@$(MAKE) -C example all
 
-.PHONY: install
-install: libapriltag.so
-	@chmod +x install.sh
-	@./install.sh $(PREFIX)/lib libapriltag.so
-	@./install.sh $(PREFIX)/include/apriltag $(APRILTAG_HEADERS)
-	@ldconfig
+#=============================================================================
+# Special targets provided by cmake.
 
-libapriltag.a: $(APRILTAG_OBJS)
-	@echo "   [$@]"
-	@$(AR) -cq $@ $(APRILTAG_OBJS)
+# Disable implicit rules so canonical targets will work.
+.SUFFIXES:
 
-libapriltag.so: $(APRILTAG_OBJS)
-	@echo "   [$@]"
-	@$(CC) -fPIC -shared -o $@ $^
 
-%.o: %.c
-	@echo "   $@"
-	@$(CC) -o $@ -c $< $(CFLAGS)
+# Remove some rules from gmake that .SUFFIXES does not remove.
+SUFFIXES =
 
-.PHONY: clean
+.SUFFIXES: .hpux_make_needs_suffix_list
+
+
+# Suppress display of executed commands.
+$(VERBOSE).SILENT:
+
+
+# A target that is always out of date.
+cmake_force:
+
+.PHONY : cmake_force
+
+#=============================================================================
+# Set environment variables for the build.
+
+# The shell in which to execute make rules.
+SHELL = /bin/sh
+
+# The CMake executable.
+CMAKE_COMMAND = /usr/bin/cmake
+
+# The command to remove a file.
+RM = /usr/bin/cmake -E remove -f
+
+# Escaping for special characters.
+EQUALS = =
+
+# The top-level source directory on which CMake was run.
+CMAKE_SOURCE_DIR = /home/apollo/apriltag
+
+# The top-level build directory on which CMake was run.
+CMAKE_BINARY_DIR = /home/apollo/apriltag
+
+#=============================================================================
+# Targets provided globally by CMake.
+
+# Special rule for the target install/strip
+install/strip: preinstall
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Installing the project stripped..."
+	/usr/bin/cmake -DCMAKE_INSTALL_DO_STRIP=1 -P cmake_install.cmake
+.PHONY : install/strip
+
+# Special rule for the target install/strip
+install/strip/fast: preinstall/fast
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Installing the project stripped..."
+	/usr/bin/cmake -DCMAKE_INSTALL_DO_STRIP=1 -P cmake_install.cmake
+.PHONY : install/strip/fast
+
+# Special rule for the target edit_cache
+edit_cache:
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "No interactive CMake dialog available..."
+	/usr/bin/cmake -E echo No\ interactive\ CMake\ dialog\ available.
+.PHONY : edit_cache
+
+# Special rule for the target edit_cache
+edit_cache/fast: edit_cache
+
+.PHONY : edit_cache/fast
+
+# Special rule for the target install
+install: preinstall
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Install the project..."
+	/usr/bin/cmake -P cmake_install.cmake
+.PHONY : install
+
+# Special rule for the target install
+install/fast: preinstall/fast
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Install the project..."
+	/usr/bin/cmake -P cmake_install.cmake
+.PHONY : install/fast
+
+# Special rule for the target rebuild_cache
+rebuild_cache:
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Running CMake to regenerate build system..."
+	/usr/bin/cmake -H$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)
+.PHONY : rebuild_cache
+
+# Special rule for the target rebuild_cache
+rebuild_cache/fast: rebuild_cache
+
+.PHONY : rebuild_cache/fast
+
+# Special rule for the target list_install_components
+list_install_components:
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Available install components are: \"Unspecified\""
+.PHONY : list_install_components
+
+# Special rule for the target list_install_components
+list_install_components/fast: list_install_components
+
+.PHONY : list_install_components/fast
+
+# Special rule for the target install/local
+install/local: preinstall
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Installing only the local directory..."
+	/usr/bin/cmake -DCMAKE_INSTALL_LOCAL_ONLY=1 -P cmake_install.cmake
+.PHONY : install/local
+
+# Special rule for the target install/local
+install/local/fast: preinstall/fast
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Installing only the local directory..."
+	/usr/bin/cmake -DCMAKE_INSTALL_LOCAL_ONLY=1 -P cmake_install.cmake
+.PHONY : install/local/fast
+
+# The main all target
+all: cmake_check_build_system
+	$(CMAKE_COMMAND) -E cmake_progress_start /home/apollo/apriltag/CMakeFiles /home/apollo/apriltag/CMakeFiles/progress.marks
+	$(MAKE) -f CMakeFiles/Makefile2 all
+	$(CMAKE_COMMAND) -E cmake_progress_start /home/apollo/apriltag/CMakeFiles 0
+.PHONY : all
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+# The main clean target
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-	@$(MAKE) -C example clean
+	$(MAKE) -f CMakeFiles/Makefile2 clean
+.PHONY : clean
+
+# The main clean target
+clean/fast: clean
+
+.PHONY : clean/fast
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+# Prepare targets for installation.
+preinstall: all
+	$(MAKE) -f CMakeFiles/Makefile2 preinstall
+.PHONY : preinstall
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+# Prepare targets for installation.
+preinstall/fast:
+	$(MAKE) -f CMakeFiles/Makefile2 preinstall
+.PHONY : preinstall/fast
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+	@echo "... common/zarray.s"
+	@echo "... common/zhash.o"
+	@echo "... common/zhash.i"
+	@echo "... common/zhash.s"
+	@echo "... common/zmaxheap.o"
+	@echo "... common/zmaxheap.i"
+	@echo "... common/zmaxheap.s"
+	@echo "... tag16h5.o"
+	@echo "... tag16h5.i"
+	@echo "... tag16h5.s"
+	@echo "... tag25h9.o"
+	@echo "... tag25h9.i"
+	@echo "... tag25h9.s"
+	@echo "... tag36h11.o"
+	@echo "... tag36h11.i"
+	@echo "... tag36h11.s"
+	@echo "... tagCircle21h7.o"
+	@echo "... tagCircle21h7.i"
+	@echo "... tagCircle21h7.s"
+	@echo "... tagCircle49h12.o"
+	@echo "... tagCircle49h12.i"
+	@echo "... tagCircle49h12.s"
+	@echo "... tagCustom48h12.o"
+	@echo "... tagCustom48h12.i"
+	@echo "... tagCustom48h12.s"
+	@echo "... tagStandard41h12.o"
+	@echo "... tagStandard41h12.i"
+	@echo "... tagStandard41h12.s"
+	@echo "... tagStandard52h13.o"
+	@echo "... tagStandard52h13.i"
+	@echo "... tagStandard52h13.s"
+.PHONY : help
+
+
+
+#=============================================================================
+# Special targets to cleanup operation of make.
+
+# Special rule to run CMake to check the build system integrity.
+# No rule that depends on this can have commands that come from listfiles
+# because they might be regenerated.
+cmake_check_build_system:
+	$(CMAKE_COMMAND) -H$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 0
+.PHONY : cmake_check_build_system
+