Add support for static libraries to XC8.

Author: Bartosz Grabias

Modules/Compiler/XC8-C.cmake

@@ -30,7 +30,10 @@ string(APPEND CMAKE_C_FLAGS_INIT
     " --chip=${MICROCHIP_MCU_MODEL}"
 )
 
+
 set(CMAKE_C_OUTPUT_EXTENSION ".p1")
+set(CMAKE_STATIC_LIBRARY_SUFFIX_C ".lpp")
+
 
 set(CMAKE_C_COMPILE_OBJECT)
 string(APPEND CMAKE_C_COMPILE_OBJECT
@@ -44,3 +47,10 @@ string(APPEND CMAKE_C_LINK_EXECUTABLE
     "   <OBJECTS>   <LINK_LIBRARIES>"
     "   -o<TARGET>"
 )
+
+set(CMAKE_C_CREATE_STATIC_LIBRARY)
+string(APPEND CMAKE_C_CREATE_STATIC_LIBRARY
+    "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS>"
+    "   <OBJECTS>   <LINK_LIBRARIES>"
+    " --output=lpp -o<TARGET>"
+)

Modules/Compiler/XC8CC-C.cmake

@@ -37,3 +37,9 @@ string(APPEND CMAKE_C_LINK_EXECUTABLE
     "   <OBJECTS>   <LINK_LIBRARIES>"
     "   -o <TARGET>"
 )
+
+set(CMAKE_C_CREATE_STATIC_LIBRARY)
+string(APPEND CMAKE_C_CREATE_STATIC_LIBRARY
+    "<CMAKE_AR> -r <TARGET>"
+    "   <OBJECTS> <LINK_LIBRARIES>"
+)

Modules/Platform/MicrochipMCU-C-XC8.cmake

@@ -44,6 +44,10 @@ if(MICROCHIP_XC8_CLI STREQUAL "xc8-cc")
         PATHS "${MICROCHIP_XC8_PATH}"
         PATH_SUFFIXES "bin"
     )
+    find_program(CMAKE_AR "xc8-ar"
+        PATHS "${MICROCHIP_XC8_PATH}"
+        PATH_SUFFIXES "bin"
+    )
     set(_xc8_version_flag "--version")
     set(CMAKE_C_COMPILER_ID "XC8CC")
 elseif(MICROCHIP_XC8_CLI STREQUAL "xc8")