![Thomas Petazzoni](/assets/img/avatar_default.png)
* ccache is now a normal package (both for the host and the target). * ccache option is now part of the "Build options" menu. It will automatically build ccache for the host before building anything, and will use it to cache builds for both host compilations and target compilations. * bump ccache to 3.1.3 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
278 lines
7.7 KiB
Plaintext
278 lines
7.7 KiB
Plaintext
#
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mainmenu "Buildroot2 Configuration"
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config BR2_HAVE_DOT_CONFIG
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bool
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default y
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config BR2_VERSION
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string
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option env="BR2_VERSION_FULL"
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source "target/Config.in.arch"
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source "target/device/Config.in"
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menu "Build options"
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menu "Commands"
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config BR2_WGET
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string "Wget command"
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default "wget --passive-ftp -nd -t 3"
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config BR2_SVN
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string "Subversion (svn) command"
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default "svn"
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config BR2_BZR
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string "Bazaar (bzr) command"
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default "bzr"
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config BR2_GIT
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string "Git command"
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default "git"
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config BR2_ZCAT
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string "zcat command"
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default "gzip -d -c"
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help
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Command to be used to extract a gzip'ed file to stdout.
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zcat is identical to gunzip -c except that the former may
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not be available on your system.
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Default is "gzip -d -c"
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Other possible values include "gunzip -c" or "zcat".
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config BR2_BZCAT
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string "bzcat command"
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default "bzcat"
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help
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Command to be used to extract a bzip2'ed file to stdout.
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bzcat is identical to bunzip2 -c except that the former may
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not be available on your system.
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Default is "bzcat"
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Other possible values include "bunzip2 -c" or "bzip2 -d -c".
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config BR2_TAR_OPTIONS
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string "Tar options"
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default ""
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help
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Options to pass to tar when extracting the sources.
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E.g. " -v --exclude='*.svn*'" to exclude all .svn internal files
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and to be verbose.
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endmenu
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config BR2_DL_DIR
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string "Download dir"
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default "$(TOPDIR)/dl"
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help
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Directory to store all the source files that we need to fetch.
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If the Linux shell environment has defined the BUILDROOT_DL_DIR
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environment variable, then this overrides this configuration item.
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The default is $(TOPDIR)/dl
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config BR2_STAGING_DIR
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string "Toolchain and header file location?"
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default "$(BASE_DIR)/staging"
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help
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This is the location where the toolchain will be installed. The
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toolchain will not work if it is moved from this location.
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Therefore, if you wish to package up a uClibc toolchain, it is
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important that is is set to the final location where the toolchain
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will be used.
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Most people will leave this set to the default value of
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"$(BASE_DIR)/staging".
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source "target/device/Config.in.mirrors"
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config BR2_JLEVEL
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int "Number of jobs to run simultaneously"
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default "2"
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help
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Number of jobs to run simultaneously
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config BR2_CCACHE
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bool "Enable compiler cache"
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help
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This option will enable the use of ccache, a compiler
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cache. It will cache the result of previous builds to speed
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up future builds. The cache is stored in
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$HOME/.buildroot-ccache.
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config BR2_DEPRECATED
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bool "Show packages that are deprecated or obsolete"
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help
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This option hides outdated/obsolete versions of packages.
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config BR2_ENABLE_DEBUG
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bool "build packages with debugging symbols"
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select BR2_PACKAGE_GDB_SERVER
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help
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Build packages with debugging symbols
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enabled
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if BR2_ENABLE_DEBUG
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choice
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prompt "gcc debug level"
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default BR2_DEBUG_2
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help
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Set the debug level for gcc
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config BR2_DEBUG_1
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bool "debug level 1"
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help
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Debug level 1 produces minimal information, enough
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for making backtraces in parts of the program that
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you don't plan to debug. This includes descriptions
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of functions and external variables, but no information
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about local variables and no line numbers.
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config BR2_DEBUG_2
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bool "debug level 2"
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help
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The default gcc debug level is 2
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config BR2_DEBUG_3
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bool "debug level 3"
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help
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Level 3 includes extra information, such as all the
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macro definitions present in the program. Some debuggers
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support macro expansion when you use -g3.
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endchoice
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endif
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choice
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prompt "strip"
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default BR2_STRIP_strip
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help
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Select whether to strip binaries and libraries for the target
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or not.
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strip is the normal strip command
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sstrip is a strip that discards more than the normal strip
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none do not strip (only for debugging!)
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config BR2_STRIP_strip
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bool "strip"
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depends on !BR2_ENABLE_DEBUG && !BR2_ELF2FLT
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help
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strip is the normal strip command
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config BR2_STRIP_sstrip
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bool "sstrip"
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select BR2_PACKAGE_SSTRIP_HOST
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depends on !BR2_ENABLE_DEBUG && !BR2_ELF2FLT
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help
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sstrip is a strip that discards more than the normal strip
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config BR2_STRIP_none
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bool "none"
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help
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none do not strip (only for debugging!)
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endchoice
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choice
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prompt "gcc optimization level"
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default BR2_OPTIMIZE_S
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help
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Set the optimization level for gcc
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config BR2_OPTIMIZE_0
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bool "optimization level 0"
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help
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Do not optimize. This is the default.
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config BR2_OPTIMIZE_1
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bool "optimization level 1"
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help
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Optimize. Optimizing compilation takes somewhat more time,
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and a lot more memory for a large function. With -O, the
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compiler tries to reduce code size and execution time,
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without performing any optimizations that take a great deal
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of compilation time. -O turns on the following optimization
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flags: -fdefer-pop -fdelayed-branch -fguess-branch-probability
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-fcprop-registers -floop-optimize -fif-conversion
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-fif-conversion2 -ftree-ccp -ftree-dce -ftree-dominator-opts
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-ftree-dse -ftree-ter -ftree-lrs -ftree-sra -ftree-copyrename
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-ftree-fre -ftree-ch -funit-at-a-time -fmerge-constants
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-O also turns on -fomit-frame-pointer on machines where doing
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so does not interfere with debugging.
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config BR2_OPTIMIZE_2
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bool "optimization level 2"
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help
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Optimize even more. GCC performs nearly all supported optimizations
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that do not involve a space-speed tradeoff. The compiler does not
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perform loop unrolling or function inlining when you specify -O2.
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As compared to -O, this option increases both compilation time and
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the performance of the generated code. -O2 turns on all optimization
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flags specified by -O. It also turns on the following optimization
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flags: -fthread-jumps -fcrossjumping -foptimize-sibling-calls
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-fcse-follow-jumps -fcse-skip-blocks -fgcse -fgcse-lm
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-fexpensive-optimizations -fstrength-reduce -frerun-cse-after-loop
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-frerun-loop-opt -fcaller-saves -fpeephole2 -fschedule-insns
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-fschedule-insns2 -fsched-interblock -fsched-spec -fregmove
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-fstrict-aliasing -fdelete-null-pointer-checks -freorder-blocks
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-freorder-functions -falign-functions -falign-jumps -falign-loops
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-falign-labels -ftree-vrp -ftree-pre
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Please note the warning under -fgcse about invoking -O2 on programs
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that use computed gotos.
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config BR2_OPTIMIZE_3
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bool "optimization level 3"
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help
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Optimize yet more. -O3 turns on all optimizations specified by -O2
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and also turns on the -finline-functions, -funswitch-loops and
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-fgcse-after-reload options.
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config BR2_OPTIMIZE_S
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bool "optimize for size"
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help
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Optimize for size. -Os enables all -O2 optimizations that do not
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typically increase code size. It also performs further optimizations
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designed to reduce code size. -Os disables the following optimization
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flags: -falign-functions -falign-jumps -falign-loops -falign-labels
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-freorder-blocks -freorder-blocks-and-partition -fprefetch-loop-arrays
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-ftree-vect-loop-version
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endchoice
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config BR2_PREFER_STATIC_LIB
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bool "prefer static libraries"
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help
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Where possible, build and use static libraries for the target.
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This potentially increases your code size and should only be
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used if you know what you do.
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The default is to build dynamic libraries and use those on
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the target filesystem.
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WARNING: This is highly experimental at the moment.
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config BR2_HAVE_DOCUMENTATION
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bool "documentation on the target"
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help
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Install the documentation, including manual pages and info
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pages, on the target.
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If you say n here, your target will not contain any
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documentation.
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config BR2_HAVE_DEVFILES
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bool "development files in target filesystem"
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help
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Install headers and static libraries in the
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target filesystem
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endmenu
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source "toolchain/Config.in"
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source "package/Config.in"
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source "fs/Config.in"
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source "boot/Config.in"
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source "linux/Config.in"
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