diff --git a/CMakeLists.txt b/CMakeLists.txt
index 177abeae..5f4058fc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,12 +74,12 @@ elseif(CMAKE_Fortran_COMPILER_ID MATCHES "^(GNU)$")
 endif()
 
 message(STATUS "Checking if user wants to use NCEPLIBS-g2c...")
-if(USE_G2CLIB) 
-  if(USE_PNG) 
+if(USE_G2CLIB)
+  if(USE_PNG)
     message(FATAL_ERROR "If USE_G2CLIB is on, USE_PNG must be off")
   endif()
 
-  if(USE_JASPER) 
+  if(USE_JASPER)
     message(FATAL_ERROR "If USE_G2CLIB is on, USE_JASPER must be off")
   endif()
 endif()
@@ -87,14 +87,22 @@ endif()
 # If user wants to use NCEPLIBS-ip, find it and the sp library.
 message(STATUS "Checking if the user want to use NCEPLIBS-ip...")
 if(USE_IPOLATES)
-  find_package(ip 5.1.0 CONFIG REQUIRED)
-  list(APPEND definitions_list -DIPOLATES_LIB="ipolates_lib_d")
-  # list(APPEND definitions_list -DUSE_IPOLATES)
+  find_package(ip 5.1.0 CONFIG)
+  if (ip_FOUND)
+      list(APPEND definitions_list -DIPOLATES_LIB="ipolates_lib_d")
+  else()
+      message(STATUS "NCEPLIBS-ip not found, USE_IPOLATES set to off")
+      set(USE_IPOLATES off)
+  endif()
 endif()
 
 message(STATUS "Checking if the user want to use NetCDF...")
 if(USE_NETCDF)
-  find_package(NetCDF MODULE REQUIRED COMPONENTS C)
+  find_package(NetCDF MODULE COMPONENTS C)
+  if (NOT NETCDF_FOUND)
+      set(USE_NETCDF off)
+      message(STATUS "NetCDF libs not found, USE_NETCDF set to off")
+  endif()
 endif()
 
 if(USE_OPENJPEG AND USE_JASPER)
@@ -103,17 +111,26 @@ endif()
 
 message(STATUS "Checking if the user wants to use Jasper...")
 if(USE_JASPER)
-  list(APPEND definitions_list -DUSE_JASPER)
-  find_package(Jasper REQUIRED)
-  if(JASPER_VERSION_STRING VERSION_GREATER_EQUAL "1.900.25")
-    list(APPEND definitions_list -DJAS_VERSION_MAJOR=2)
+  find_package(Jasper)
+  if(JASPER_FOUND)
+    list(APPEND definitions_list -DUSE_JASPER)
+    if(JASPER_VERSION_STRING VERSION_GREATER_EQUAL "1.900.25")
+      list(APPEND definitions_list -DJAS_VERSION_MAJOR=2)
+    endif()
+  else()
+     message(STATUS "Jasper not found, USE_JASPER set to off")
+     set(USE_JASPER off)
   endif()
 endif()
 
 # Find required packages to use OpenJPEG
 message(STATUS "Checking if the user wants to use OpenJPEG...")
 if(USE_OPENJPEG)
-  find_package(OpenJPEG REQUIRED)
+  find_package(OpenJPEG)
+  if(NOT USE_OPENJPEG)
+      message(STATUS "OpenJSON not found, USE_OPENJPEG set to off")
+      set(USE_OPENJPEG off)
+  endif()
 endif()
 
 message(STATUS "Checking if the user want to use OpenMP...")
@@ -121,6 +138,9 @@ if(USE_OPENMP)
   find_package(OpenMP)
   if(OpenMP_CXX_FOUND)
      target_link_libraries(MyTarget PUBLIC OpenMP::OpenMP_CXX)
+  else()
+     message(STATUS "OpenMP not found, USE_OPENMP set to off")
+     set(USE_OPENMP off)
   endif()
 #  if(OpenMP_Fortran_FOUND)
 #     target_link_libraries(MyTarget PUBLIC OpenMP::OpenMP_Fortran)
@@ -195,6 +215,6 @@ endif()
 # Determine whether or not to generate documentation.
 if(ENABLE_DOCS)
   find_package(Doxygen REQUIRED)
-  add_subdirectory(docs)  
+  add_subdirectory(docs)
 endif()