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#.rst:
# FindCCache
# ----------
# Finds ccache and sets it up as compiler wrapper.
# This should ideally be called before the call to project().
#
# See: https://crascit.com/2016/04/09/using-ccache-with-cmake/
find_program(CCACHE_PROGRAM ccache)
if(CCACHE_PROGRAM)
execute_process(COMMAND "${CCACHE_PROGRAM}" --version
OUTPUT_VARIABLE CCACHE_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REGEX MATCH "[^\n]* version [^\n]*" CCACHE_VERSION "${CCACHE_VERSION}")
string(REGEX REPLACE ".* version (.*)" "\\1" CCACHE_VERSION "${CCACHE_VERSION}")
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(CCache REQUIRED_VARS CCACHE_PROGRAM
VERSION_VAR CCACHE_VERSION)
if(CCACHE_FOUND)
# Supports Unix Makefiles, Ninja and Xcode
set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" CACHE STRING "" FORCE)
set(CMAKE_C_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" CACHE STRING "" FORCE)
file(WRITE "${CMAKE_BINARY_DIR}/launch-c" "#!/bin/sh\nexec \"${CCACHE_PROGRAM}\" \"${CMAKE_C_COMPILER}\" \"$@\"\n")
file(WRITE "${CMAKE_BINARY_DIR}/launch-cxx" "#!/bin/sh\nexec \"${CCACHE_PROGRAM}\" \"${CMAKE_CXX_COMPILER}\" \"$@\"\n")
execute_process(COMMAND chmod +x "${CMAKE_BINARY_DIR}/launch-c" "${CMAKE_BINARY_DIR}/launch-cxx")
set(CMAKE_XCODE_ATTRIBUTE_CC "${CMAKE_BINARY_DIR}/launch-c" PARENT_SCOPE)
set(CMAKE_XCODE_ATTRIBUTE_CXX "${CMAKE_BINARY_DIR}/launch-cxx" PARENT_SCOPE)
set(CMAKE_XCODE_ATTRIBUTE_LD "${CMAKE_BINARY_DIR}/launch-c" PARENT_SCOPE)
set(CMAKE_XCODE_ATTRIBUTE_LDPLUSPLUS "${CMAKE_BINARY_DIR}/launch-cxx" PARENT_SCOPE)
endif()
mark_as_advanced(CCACHE_PROGRAM)
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