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Don't use uppercase titles in the manual
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Joel Rosdahl
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934fddbc61
60
manual.txt
60
manual.txt
@ -2,13 +2,13 @@ CCACHE(1)
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=========
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NAME
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Name
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----
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ccache - a fast C/C++ compiler cache
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SYNOPSIS
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Synopsis
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--------
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[verse]
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@ -17,7 +17,7 @@ SYNOPSIS
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'compiler' ['compiler options'] (via symbolic link)
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DESCRIPTION
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Description
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-----------
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ccache is a compiler cache. It speeds up recompilation by caching the result of
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@ -31,7 +31,7 @@ goal are listed under <<_bugs,BUGS>>. If you ever discover an undocumented case
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where ccache changes the output of your compiler, please let us know.
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FEATURES
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Features
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~~~~~~~~
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* Keeps statistics on hits/misses.
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@ -43,7 +43,7 @@ FEATURES
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* Optionally compresses files in the cache to reduce disk space.
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LIMITATIONS
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Limitations
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~~~~~~~~~~~
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* Only knows how to cache the compilation of a single
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@ -55,7 +55,7 @@ LIMITATIONS
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will silently fall back to running the real compiler.
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RUN MODES
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Run modes
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---------
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There are two ways to use ccache. You can either prefix your compilation
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@ -83,7 +83,7 @@ NOTE: Do not use a hard link, use a symbolic link. A hard link will cause
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``interesting'' problems.
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OPTIONS
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Options
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-------
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These options only apply when you invoke ccache as ``ccache''. When invoked as
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@ -135,7 +135,7 @@ compiler options apply and you should refer to the compiler's documentation.
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Zero the cache statistics (but not the configured limits).
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EXTRA OPTIONS
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Extra options
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-------------
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When run as a compiler, ccache usually just takes the same command line options
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@ -153,7 +153,7 @@ using *--ccache-skip* you can force an option to not be treated as an input
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file name and instead be passed along to the compiler as a command line option.
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ENVIRONMENT VARIABLES
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Environment variables
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---------------------
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ccache uses a number of environment variables to control operation. In most
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@ -340,11 +340,11 @@ cases you won't need any of these as the defaults will be fine.
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hash, so cached compilations with *CCACHE_UNIFY* set cannot be used when
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*CCACHE_UNIFY* is not set and vice versa. The reason the unifier is off by
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default is that it can give incorrect line number information in compiler
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warning messages. *Note*: Enabling the unifier implies turning off the
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direct mode.
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warning messages. Also note that enabling the unifier implies turning off
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the direct mode.
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CACHE SIZE MANAGEMENT
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Cache size management
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---------------------
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By default ccache has a one gigabyte limit on the total size of files in the
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@ -354,7 +354,7 @@ to see the cache size and the currently configured limits (in addition to other
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various statistics).
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CACHE COMPRESSION
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Cache compression
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-----------------
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ccache can optionally compress all files it puts into the cache using the
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@ -364,7 +364,7 @@ You can turn on compression by setting the *CCACHE_COMPRESS* environment
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variable.
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HOW CCACHE WORKS
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How ccache works
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----------------
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The basic idea is to detect when you are compiling exactly the same code a
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@ -383,7 +383,7 @@ ccache has two ways of doing the detection:
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* the *preprocessor mode* (hashes output from the preprocessor)
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THE DIRECT MODE
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The direct mode
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~~~~~~~~~~~~~~~
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In the direct mode, the hash is formed of:
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@ -425,7 +425,7 @@ The direct mode will be disabled if any of the following holds:
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the source code
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THE PREPROCESSOR MODE
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The preprocessor mode
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~~~~~~~~~~~~~~~~~~~~~
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In the preprocessor mode, the hash is formed of:
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@ -434,15 +434,15 @@ In the preprocessor mode, the hash is formed of:
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* the command line options except options that affect include files (*-I*,
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*-include*, *-D*, etc; the theory is that these options will change the
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preprocessor output if they have any effect at all)
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* the real compiler's size and modification time (unless CCACHE_COMPILERCHECK*
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*says something else)
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* the real compiler's size and modification time (unless *CCACHE_COMPILERCHECK*
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says something else)
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* any standard error output generated by the preprocessor
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Based on the hash, the cached compilation result can be looked up directly in
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the cache.
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COMPILING IN DIFFERENT DIRECTORIES
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Compiling in different directories
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----------------------------------
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Some information included in the hash that identifies a unique compilation may
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@ -480,7 +480,7 @@ The drawbacks of using *CCACHE_BASEDIR* are:
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``cd'' command in GDB.
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SHARING A CACHE
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Sharing a cache
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---------------
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A group of developers can increase the cache hit rate by sharing a cache
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@ -509,7 +509,7 @@ You may also want to make sure that the developers have *CCACHE_BASEDIR* set
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appropriately, as discussed in the previous section.
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SHARING A CACHE ON NFS
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Sharing a cache on NFS
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----------------------
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It is possible to put the cache directory on an NFS filesystem (or similar
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@ -523,7 +523,7 @@ A tip is to set *CCACHE_TEMPDIR* to a directory on the local host to avoid NFS
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traffic for temporary files.
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USING CCACHE WITH DISTCC
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Using ccache with distcc
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------------------------
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``distcc'' is a very useful program for distributing compilation across a range
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@ -543,7 +543,7 @@ that compiler upgrades will not be detected properly and that the cached
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results will not be shared between compilations with and without distcc.
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BUGS
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Bugs
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----
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* ccache doesn't handle the GNU Assembler's *.incbin* directive correctly. This
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@ -555,10 +555,10 @@ BUGS
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TROUBLESHOOTING
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Troubleshooting
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---------------
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GENERAL
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General
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~~~~~~~
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A general tip for getting information about what ccache is doing is to enable
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@ -567,7 +567,7 @@ important decisions that ccache makes, read and written files, etc. Another way
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of keeping track of what is happening is to check the output of *ccache -s*.
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PERFORMANCE
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Performance
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~~~~~~~~~~~
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ccache has been written to perform well out of the box, but sometimes you may
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@ -643,7 +643,7 @@ problems and what may be done to increase the hit rate:
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and check which option was rejected.
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ERRORS WHEN COMPILING WITH CCACHE
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Errors when compiling with ccache
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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If compilation doesn't work with ccache, but it works without it, one possible
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@ -652,7 +652,7 @@ workaround that may work is to set *CCACHE_CPP2*. This will make cache misses
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slower, though, so it is better to find and fix the root cause.
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CORRUPT OBJECT FILES
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Corrupt object files
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~~~~~~~~~~~~~~~~~~~~
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It should be noted that ccache is susceptible to general storage problems. If a
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@ -669,14 +669,14 @@ reproducibly. That doesn't mean it can't happen, so if you find a repeatable
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case, please report it.
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MORE INFORMATION
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More information
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----------------
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Credits, mailing list information, bug reporting instructions, source code,
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etc, can be found on ccache's web site: <http://ccache.samba.org>.
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AUTHOR
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Author
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------
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ccache was originally written by Andrew Tridgell and is currently maintained by
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