Enable the use of ccache and other compiler cache utilities

Author: dgovil

cmake/defaults/CXXDefaults.cmake

@@ -89,3 +89,14 @@ if (PXR_PREFER_SAFETY_OVER_SPEED)
 else()
    set(PXR_PREFER_SAFETY_OVER_SPEED "0")
 endif()
+
+# Setup CCache for C/C++ compilation
+if(PXR_ENABLE_COMPILER_CACHE)
+    find_program(COMPILER_CACHE_PROGRAM ${PXR_COMPILER_CACHE_NAME})
+    if(COMPILER_CACHE_PROGRAM)
+        set(CMAKE_C_COMPILER_LAUNCHER "${COMPILER_CACHE_PROGRAM}")
+        set(CMAKE_CXX_COMPILER_LAUNCHER "${COMPILER_CACHE_PROGRAM}")
+    else ()
+        MESSAGE(STATUS "Compiler Caching disabled. Could not find ${PXR_COMPILER_CACHE_NAME}.")
+    endif()
+endif()

cmake/defaults/Options.cmake

@@ -231,3 +231,11 @@ if (${PXR_BUILD_PYTHON_DOCUMENTATION})
         set(PXR_BUILD_PYTHON_DOCUMENTATION "OFF" CACHE BOOL "" FORCE)
     endif()
 endif()
+
+# Configure the use of compiler caches for faster compilation
+option(PXR_ENABLE_COMPILER_CACHE "Enable the use of a compiler cache" OFF)
+set(PXR_COMPILER_CACHE_NAME "ccache"
+        CACHE
+        STRING
+        "The name of the compiler cache program to use"
+)