build(wiringpi): added CMakeLists.txt for wiringPi shared library

wiringPi/CMakeLists.txt

@@ -0,0 +1,55 @@
+cmake_minimum_required(VERSION 3.10)
+
+project(wiringPi VERSION 0.1)
+set(TARGET wiringPi)
+
+# Have CMake find pthreads library within our toolchain
+set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
+find_package(Threads REQUIRED)
+
+# Source Files
+set(wiringPi_src
+    ads1115.c bmp180.c drcNet.c drcSerial.c
+    ds18b20.c htu21d.c max31855.c max5322.c
+    mcp23008.c mcp23016.c mcp23017.c mcp23s08.c
+    mcp23s17.c mcp3002.c mcp3004.c mcp3422.c
+    mcp4802.c pcf8574.c pcf8591.c piHiPri.c
+    piThread.c pseudoPins.c rht03.c sn3218.c
+    softPwm.c softServo.c softTone.c sr595.c
+    wiringPi.c wiringPiI2C.c wiringPiSPI.c
+    wiringSerial.c wiringShift.c wpiExtensions.c
+)
+
+# Headers file
+set(wiringPi_h
+    ads1115.h bmp180.h drcNet.h drcSerial.h
+    ds18b20.h htu21d.h max31855.h max5322.h
+    mcp23008.h mcp23016.h mcp23016reg.h mcp23017.h
+    mcp23s08.h mcp23s17.h mcp23x08.h mcp23x0817.h
+    mcp3002.h mcp3004.h mcp3422.h mcp4802.h
+    pcf8574.h pcf8591.h pseudoPins.h rht03.h
+    sn3218.h softPwm.h softServo.h softTone.h
+    sr595.h wiringPi.h wiringPiI2C.h wiringPiSPI.h
+    wiringSerial.h wiringShift.h wpiExtensions.h
+)
+
+# Add library target
+add_library (${TARGET} SHARED ${wiringPi_src})
+
+# Add include directory for wiringPi
+target_include_directories (${TARGET} PUBLIC 
+                            ${CMAKE_CURRENT_SOURCE_DIR}
+                            ${CMAKE_INSTALL_PREFIX}/include)
+
+
+# Add the following required libraries: Threads, Math, Crypt, and RealTime
+target_link_libraries(${TARGET} ${CMAKE_THREAD_LIBS_INIT} crypt m rt)
+
+# Expose wiringPi public to other subprojects
+set(${TARGET}_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}
+    CACHE INTERNAL "${PROJECT_NAME}: Include directories" FORCE
+)
+
+# Add install
+install(TARGETS ${TARGET} DESTINATION lib)
+install(FILES ${wiringPi_h} DESTINATION include)