# mainmenu "Buildroot $BR2_VERSION Configuration" config BR2_HAVE_DOT_CONFIG bool default y config BR2_VERSION string option env="BR2_VERSION_FULL" config BR2_HOSTARCH string option env="HOSTARCH" config BR2_EXTERNAL string option env="BR2_EXTERNAL" # Hidden boolean selected by packages in need of Java in order to build # (example: xbmc) config BR2_NEEDS_HOST_JAVA bool # Hidden boolean selected by packages in need of javac in order to build # (example: classpath) config BR2_NEEDS_HOST_JAVAC bool # Hidden boolean selected by packages in need of jar in order to build # (example: classpath) config BR2_NEEDS_HOST_JAR bool # Hidden boolean selected by pre-built packages for x86, when they # need to run on x86-64 machines (example: pre-built external # toolchains, binary tools like SAM-BA, etc.). config BR2_HOSTARCH_NEEDS_IA32_LIBS bool # Hidden boolean selected by packages that need to build 32 bits # binaries with the host compiler, even on 64 bits build machines (e.g # bootloaders). config BR2_HOSTARCH_NEEDS_IA32_COMPILER bool source "arch/Config.in" menu "Build options" menu "Commands" config BR2_WGET string "Wget command" default "wget --passive-ftp -nd -t 3" config BR2_SVN string "Subversion (svn) command" default "svn" config BR2_BZR string "Bazaar (bzr) command" default "bzr" config BR2_GIT string "Git command" default "git" config BR2_CVS string "CVS command" default "cvs" config BR2_LOCALFILES string "Local files retrieval command" default "cp" config BR2_SCP string "Secure copy (scp) command" default "scp" config BR2_SSH string "Secure shell (ssh) command" default "ssh" config BR2_HG string "Mercurial (hg) command" default "hg" config BR2_ZCAT string "zcat command" default "gzip -d -c" help Command to be used to extract a gzip'ed file to stdout. zcat is identical to gunzip -c except that the former may not be available on your system. Default is "gzip -d -c" Other possible values include "gunzip -c" or "zcat". config BR2_BZCAT string "bzcat command" default "bzcat" help Command to be used to extract a bzip2'ed file to stdout. bzcat is identical to bunzip2 -c except that the former may not be available on your system. Default is "bzcat" Other possible values include "bunzip2 -c" or "bzip2 -d -c". config BR2_XZCAT string "xzcat command" default "xzcat" help Command to be used to extract a xz'ed file to stdout. Default is "xzcat" config BR2_TAR_OPTIONS string "Tar options" default "" help Options to pass to tar when extracting the sources. E.g. " -v --exclude='*.svn*'" to exclude all .svn internal files and to be verbose. endmenu config BR2_DEFCONFIG_FROM_ENV string option env="BR2_DEFCONFIG" config BR2_DEFCONFIG string "Location to save buildroot config" default BR2_DEFCONFIG_FROM_ENV if BR2_DEFCONFIG_FROM_ENV != "" default "$(CONFIG_DIR)/defconfig" help When running 'make savedefconfig', the defconfig file will be saved in this location. config BR2_DL_DIR string "Download dir" default "$(TOPDIR)/dl" help Directory to store all the source files that we need to fetch. If the Linux shell environment has defined the BR2_DL_DIR environment variable, then this overrides this configuration item. The default is $(TOPDIR)/dl config BR2_HOST_DIR string "Host dir" default "$(BASE_DIR)/host" help Directory to store all the binary files that are built for the host. This includes the cross compilation toolchain when building the internal buildroot toolchain. The default is $(BASE_DIR)/host menu "Mirrors and Download locations" config BR2_PRIMARY_SITE string "Primary download site" default "" help Primary site to download from. If this option is set then buildroot will try to download package source first from this site and try the default if the file is not found. Valid URIs are URIs recognized by $(WGET) and scp URIs of the form scp://[user@]host:path. NOTE: This works for all packages using the central package infrastructure (generic, autotools, cmake, ...) config BR2_PRIMARY_SITE_ONLY bool "Only allow downloads from primary download site" depends on BR2_PRIMARY_SITE != "" help If this option is enabled, downloads will only be attempted from the primary download site. Other locations, like the package's official download location or the backup download site, will not be considered. Therefore, if the package is not present on the primary site, the download fails. This is useful for project developers who want to ensure that the project can be built even if the upstream tarball locations disappear. if !BR2_PRIMARY_SITE_ONLY config BR2_BACKUP_SITE string "Backup download site" default "http://sources.buildroot.net" help Backup site to download from. If this option is set then buildroot will fall back to download package sources from here if the normal location fails. config BR2_KERNEL_MIRROR string "Kernel.org mirror" default "https://www.kernel.org/pub" help kernel.org is mirrored on a number of servers around the world. The following allows you to select your preferred mirror. Have a look on the kernel.org site for a list of mirrors, then enter the URL to the base directory. Examples: http://www.XX.kernel.org/pub (XX = country code) http://mirror.aarnet.edu.au/pub/ftp.kernel.org config BR2_GNU_MIRROR string "GNU Software mirror" default "http://ftp.gnu.org/pub/gnu" help GNU has multiple software mirrors scattered around the world. The following allows you to select your preferred mirror. Have a look on the gnu.org site for a list of mirrors, then enter the URL to the base directory. Examples: http://ftp.gnu.org/pub/gnu http://mirror.aarnet.edu.au/pub/gnu endif config BR2_LUAROCKS_MIRROR string "LuaRocks mirror" default "http://rocks.moonscript.org" help LuaRocks repository. See http://luarocks.org config BR2_CPAN_MIRROR string "CPAN mirror (Perl packages)" default "http://cpan.metacpan.org" help CPAN (Comprehensive Perl Archive Network) is a repository of Perl packages. It has multiple software mirrors scattered around the world. This option allows you to select a mirror. The list of mirrors is available at: http://search.cpan.org/mirror endmenu config BR2_JLEVEL int "Number of jobs to run simultaneously (0 for auto)" default "0" help Number of jobs to run simultaneously. If 0, determine automatically according to number of CPUs on the host system. config BR2_CCACHE bool "Enable compiler cache" help This option will enable the use of ccache, a compiler cache. It will cache the result of previous builds to speed up future builds. By default, the cache is stored in $HOME/.buildroot-ccache. Note that Buildroot does not try to invalidate the cache contents when the compiler changes in an incompatible way. Therefore, if you make a change to the compiler version and/or configuration, you are responsible for purging the ccache cache by removing the $HOME/.buildroot-ccache directory. if BR2_CCACHE config BR2_CCACHE_DIR string "Compiler cache location" default "$(HOME)/.buildroot-ccache" help Where ccache should store cached files. config BR2_CCACHE_INITIAL_SETUP string "Compiler cache initial setup" help Initial ccache settings to apply, such as --max-files or --max-size. For example, if your project is known to require more space than the default max cache size, then you might want to increase the cache size to a suitable amount using the -M (--max-size) option. The string you specify here is passed verbatim to ccache. Refer to ccache documentation for more details. These initial settings are applied after ccache has been compiled. endif config BR2_DEPRECATED bool "Show options and packages that are deprecated or obsolete" help This option shows outdated/obsolete versions of packages and options that are otherwise hidden. if BR2_DEPRECATED config BR2_DEPRECATED_SINCE_2014_02 bool default y config BR2_DEPRECATED_SINCE_2014_05 bool default y config BR2_DEPRECATED_SINCE_2014_08 bool default y config BR2_DEPRECATED_SINCE_2015_02 bool default y endif config BR2_ENABLE_DEBUG bool "build packages with debugging symbols" help Build packages with debugging symbols enabled. All libraries and binaries in the 'staging' directory will have debugging symbols, which allows remote debugging even if libraries and binaries are stripped on the target. Whether libraries and binaries are stripped on the target is controlled by the BR2_STRIP_* options below. if BR2_ENABLE_DEBUG choice prompt "gcc debug level" default BR2_DEBUG_2 help Set the debug level for gcc config BR2_DEBUG_1 bool "debug level 1" help Debug level 1 produces minimal information, enough for making backtraces in parts of the program that you don't plan to debug. This includes descriptions of functions and external variables, but no information about local variables and no line numbers. config BR2_DEBUG_2 bool "debug level 2" help The default gcc debug level is 2 config BR2_DEBUG_3 bool "debug level 3" help Level 3 includes extra information, such as all the macro definitions present in the program. Some debuggers support macro expansion when you use -g3. endchoice endif choice prompt "strip command for binaries on target" default BR2_STRIP_strip config BR2_STRIP_strip bool "strip" depends on !BR2_PACKAGE_HOST_ELF2FLT help Binaries and libraries in the target filesystem will be stripped using the normal 'strip' command. This allows to save space, mainly by removing debugging symbols. Debugging symbols on the target are needed for native debugging, but not when remote debugging is used. config BR2_STRIP_sstrip bool "sstrip" select BR2_PACKAGE_SSTRIP_HOST depends on !BR2_PACKAGE_HOST_ELF2FLT depends on BR2_DEPRECATED_SINCE_2014_05 help Binaries and libraries in the target filesystem will be stripped using the 'sstrip' command, which strips a little bit more than the traditional 'strip' command. This allows to save space, mainly by removing debugging symbols. Debugging symbols on the target are needed for native debugging, but not when remote debugging is used. config BR2_STRIP_none bool "none" help Do not strip binaries and libraries in the target filesystem. endchoice config BR2_STRIP_EXCLUDE_FILES string "executables that should not be stripped" depends on !BR2_STRIP_none default "" help You may specify a space-separated list of binaries and libraries here that should not be stripped on the target. config BR2_STRIP_EXCLUDE_DIRS string "directories that should be skipped when stripping" depends on !BR2_STRIP_none default "" help You may specify a space-separated list of directories that should be skipped when stripping. Binaries and libraries in these directories will not be touched. The directories should be specified relative to the target directory, without leading slash. choice prompt "gcc optimization level" default BR2_OPTIMIZE_S help Set the optimization level for gcc config BR2_OPTIMIZE_0 bool "optimization level 0" help Do not optimize. This is the default. config BR2_OPTIMIZE_1 bool "optimization level 1" help Optimize. Optimizing compilation takes somewhat more time, and a lot more memory for a large function. With -O, the compiler tries to reduce code size and execution time, without performing any optimizations that take a great deal of compilation time. -O turns on the following optimization flags: -fdefer-pop -fdelayed-branch -fguess-branch-probability -fcprop-registers -floop-optimize -fif-conversion -fif-conversion2 -ftree-ccp -ftree-dce -ftree-dominator-opts -ftree-dse -ftree-ter -ftree-lrs -ftree-sra -ftree-copyrename -ftree-fre -ftree-ch -funit-at-a-time -fmerge-constants -O also turns on -fomit-frame-pointer on machines where doing so does not interfere with debugging. config BR2_OPTIMIZE_2 bool "optimization level 2" help Optimize even more. GCC performs nearly all supported optimizations that do not involve a space-speed tradeoff. The compiler does not perform loop unrolling or function inlining when you specify -O2. As compared to -O, this option increases both compilation time and the performance of the generated code. -O2 turns on all optimization flags specified by -O. It also turns on the following optimization flags: -fthread-jumps -fcrossjumping -foptimize-sibling-calls -fcse-follow-jumps -fcse-skip-blocks -fgcse -fgcse-lm -fexpensive-optimizations -fstrength-reduce -frerun-cse-after-loop -frerun-loop-opt -fcaller-saves -fpeephole2 -fschedule-insns -fschedule-insns2 -fsched-interblock -fsched-spec -fregmove -fstrict-aliasing -fdelete-null-pointer-checks -freorder-blocks -freorder-functions -falign-functions -falign-jumps -falign-loops -falign-labels -ftree-vrp -ftree-pre Please note the warning under -fgcse about invoking -O2 on programs that use computed gotos. config BR2_OPTIMIZE_3 bool "optimization level 3" help Optimize yet more. -O3 turns on all optimizations specified by -O2 and also turns on the -finline-functions, -funswitch-loops and -fgcse-after-reload options. config BR2_OPTIMIZE_S bool "optimize for size" help Optimize for size. -Os enables all -O2 optimizations that do not typically increase code size. It also performs further optimizations designed to reduce code size. -Os disables the following optimization flags: -falign-functions -falign-jumps -falign-loops -falign-labels -freorder-blocks -freorder-blocks-and-partition -fprefetch-loop-arrays -ftree-vect-loop-version endchoice config BR2_GOOGLE_BREAKPAD_ENABLE bool "Enable google-breakpad support" select BR2_PACKAGE_GOOGLE_BREAKPAD depends on BR2_INSTALL_LIBSTDCPP depends on BR2_TOOLCHAIN_USES_GLIBC depends on BR2_PACKAGE_GOOGLE_BREAKPAD_ARCH_SUPPORTS help This option will enable the use of google breakpad, a library and tool suite that allows you to distribute an application to users with compiler-provided debugging information removed, record crashes in compact "minidump" files, send them back to your server and produce C and C++ stack traces from these minidumps. Breakpad can also write minidumps on request for programs that have not crashed. if BR2_GOOGLE_BREAKPAD_ENABLE config BR2_GOOGLE_BREAKPAD_INCLUDE_FILES string "List of executables and libraries to extract symbols from" default "" help You may specify a space-separated list of binaries and libraries with full paths relative to $(TARGET_DIR) of which debug symbols will be dumped for further use with google breakpad. A directory structure that can be used by minidump-stackwalk will be created at: $(STAGING_DIR)/usr/share/google-breakpad-symbols endif config BR2_ENABLE_SSP bool "build code with Stack Smashing Protection" depends on BR2_TOOLCHAIN_HAS_SSP help Enable stack smashing protection support using GCCs -fstack-protector-all option. See http://www.linuxfromscratch.org/hints/downloads/files/ssp.txt for details. Note that this requires the toolchain to have SSP support. This is always the case for glibc and eglibc toolchain, but is optional in uClibc toolchains. comment "enabling Stack Smashing Protection requires support in the toolchain" depends on !BR2_TOOLCHAIN_HAS_SSP choice bool "libraries" default BR2_SHARED_STATIC_LIBS if BR2_BINFMT_SUPPORTS_SHARED default BR2_STATIC_LIBS if !BR2_BINFMT_SUPPORTS_SHARED help Select the type of libraries you want to use on the target. The default is to build dynamic libraries and use those on the target filesystem, except when the architecture and/or the selected binary format does not support shared libraries. config BR2_STATIC_LIBS bool "static only" help Build and use only static libraries. No shared libraries will be instaled on the target. This potentially increases your code size and should only be used if you know what you are doing. Note that some packages may not be available when this option is enabled, due to their need for dynamic library support. config BR2_SHARED_LIBS bool "shared only" depends on BR2_BINFMT_SUPPORTS_SHARED help Build and use only shared libraries. This is the recommended solution as it saves space and build time. config BR2_SHARED_STATIC_LIBS bool "both static and shared" depends on BR2_BINFMT_SUPPORTS_SHARED help Build both shared and static libraries, but link executables dynamically. While building both shared and static libraries take more time and more disk space, having static libraries may be useful to link some of the applications statically. endchoice config BR2_PACKAGE_OVERRIDE_FILE string "location of a package override file" default "$(CONFIG_DIR)/local.mk" help A package override file is a short makefile that contains variable definitions of the form _OVERRIDE_SRCDIR, which allows to tell Buildroot to use an existing directory as the source directory for a particular package. See the Buildroot documentation for more details on this feature. config BR2_GLOBAL_PATCH_DIR string "global patch directories" help You may specify a space separated list of one or more directories containing global package patches. For a specific version of a specific package , patches are applied as follows: First, the default Buildroot patch set for the package is applied from the package's directory in Buildroot. Then for every directory - - that exists in BR2_GLOBAL_PATCH_DIR, if the directory /// exists, then all *.patch files in this directory will be applied. Otherwise, if the directory / exists, then all *.patch files in the directory will be applied. menu "Advanced" config BR2_COMPILER_PARANOID_UNSAFE_PATH bool "paranoid check of library/header paths" help By default, when this option is disabled, when the Buildroot cross-compiler will encounter an unsafe library or header path (such as /usr/include, or /usr/lib), the compiler will display a warning. By enabling this option, this warning is turned into an error, which will completely abort the build when such unsafe paths are encountered. Note that this mechanism is available for both the internal toolchain (through gcc and binutils patches) and external toolchain backends (through the external toolchain wrapper). endmenu endmenu source "toolchain/Config.in" source "system/Config.in" source "linux/Config.in" source "package/Config.in" source "fs/Config.in" source "boot/Config.in" source "package/Config.in.host" source "Config.in.legacy" menu "User-provided options" depends on BR2_EXTERNAL != "support/dummy-external" source "$BR2_EXTERNAL/Config.in" endmenu