remove the modbusepsi include path from CFLAGS and use a relative path instead (works better with bitbake)

Author: Karl Herbig

CMakeLists.txt

@@ -93,7 +93,7 @@ else()
   add_subdirectory(3rdparty/json)
 endif()
 
-set (MODBUSPP_CFLAGS_OTHER ${CMAKE_THREAD_LIBS_INIT} ${LIBMODBUS_CFLAGS})
+set (MODBUSPP_CFLAGS_OTHER ${CMAKE_THREAD_LIBS_INIT})
 set (MODBUSPP_LDFLAGS_OTHER ${LIBMODBUS_LDFLAGS} -lpthread)
 
 include (GetDate)

modbuspp.pc.in

@@ -12,5 +12,5 @@ URL: https://github.com/epsilonrt/libmodbuspp
 Version: @MODBUSPP_VERSION@
 Requires: 
 Libs: -L${libdir} -lmodbuspp ${ldflags_other}
-Cflags: -I${includedir} ${cflags_other}
+Cflags: -I${includedir} -I${includedir}/@LIBMODBUS_NAME@ ${cflags_other}