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Build llvm with ccache if package is present

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This patch has the following changes

The CMake variable LLVM_CCACHE_BUILD is set to OFF by default.
Set this to ON for a ccache enabled build

CCACHE_CPP2 is required to compile the source file directly instead
of compiling the preprocessed file. This will help WERROR is turned ON
for a host clang compiler

The below two options makes more sense in the context of a buildbot

CCACHE_HASHDIR is required to maintain the separate cached data across
builders. This will also help the debuggers to point to the correct source
location

CCACHE_SIZE is important in the perspective of buildbot to increase the
limit on the amount of data to hold in cache for faster compilation

CCACHE_DIR is used to save the cached data to a specific directory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277389 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sumanth Gundapaneni 2016-08-01 21:28:03 +00:00
parent 822ef4e420
commit 95c3ece2ff
1 changed files with 20 additions and 0 deletions
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20
CMakeLists.txt
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@ -101,6 +101,26 @@ if(LLVM_PARALLEL_COMPILE_JOBS)
endif()
endif()
# Build llvm with ccache if the package is present
set(LLVM_CCACHE_BUILD OFF CACHE BOOL "Set to ON for a ccache enabled build")
if(LLVM_CCACHE_BUILD)
find_program(CCACHE_PROGRAM ccache)
if(CCACHE_PROGRAM)
set(LLVM_CCACHE_SIZE "" CACHE STRING "Size of ccache")
set(LLVM_CCACHE_DIR "" CACHE STRING "Directory to keep ccached data")
set(CCACHE_PROGRAM "CCACHE_CPP2=yes CCACHE_HASHDIR=yes ${CCACHE_PROGRAM}")
if (LLVM_CCACHE_SIZE)
set(CCACHE_PROGRAM "CCACHE_SIZE=${LLVM_CCACHE_SIZE} ${CCACHE_PROGRAM}")
endif()
if (LLVM_CCACHE_DIR)
set(CCACHE_PROGRAM "CCACHE_DIR=${LLVM_CCACHE_DIR} ${CCACHE_PROGRAM}")
endif()
set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE_PROGRAM})
else()
message(FATAL_ERROR "Unable to find the program ccache. Set LLVM_CCACHE_BUILD to OFF")
endif()
endif()
option(LLVM_BUILD_GLOBAL_ISEL "Experimental: Build GlobalISel" OFF)
if(LLVM_BUILD_GLOBAL_ISEL)
add_definitions(-DLLVM_BUILD_GLOBAL_ISEL)