Fix up and document controlling ccache via CMake options.

Patch by Matthew Davis!

Differential Revision: https://reviews.llvm.org/D41757

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323357 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Paul Robinson 2018-01-24 18:15:08 +00:00
parent fab3c91793
commit e2f036e8e9
2 changed files with 11 additions and 3 deletions

View File

@ -137,11 +137,11 @@ 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_MAXSIZE "" 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} ${CCACHE_PROGRAM}")
if (LLVM_CCACHE_MAXSIZE)
set(CCACHE_PROGRAM "CCACHE_MAXSIZE=${LLVM_CCACHE_MAXSIZE} ${CCACHE_PROGRAM}")
endif()
if (LLVM_CCACHE_DIR)
set(CCACHE_PROGRAM "CCACHE_DIR=${LLVM_CCACHE_DIR} ${CCACHE_PROGRAM}")

View File

@ -551,6 +551,14 @@ LLVM-specific variables
<http://clang.llvm.org/docs/SourceBasedCodeCoverage.html>`_ instrumentation
is enabled while building llvm.
**LLVM_CCACHE_BUILD**:BOOL
If enabled and the ``ccache`` program is available, then LLVM will be
built using ``ccache`` to speed up rebuilds of LLVM and its components.
Defaults to OFF. The size and location of the cache maintained
by ``ccache`` can be adjusted via the LLVM_CCACHE_MAXSIZE and LLVM_CCACHE_DIR
options, which are passed to the CCACHE_MAXSIZE and CCACHE_DIR environment
variables, respectively.
CMake Caches
============