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buildroot/Config.in
Daniel Laird 5432f26f0e Adding Central config.cache options 
The following changes allow for use of a central configure cache
file.  This speeds up configuration of packages.
Its use is configurable at the top level (BR2_CONFIG_CACHE - default n).
Old style makefiles can use it if they use the following MACRO in makefiles:
$(AUTO_CONFIGURE_TARGET) see my change to directfb.mk.
New style Autotools.in will use it if you set the global option.
However you can enable the global option and on a per package overrule it by doing
the following: $(PKGNAME)_USE_CONFIG_CACHE = NO see fontconfig.mk for an example 
of this.
Finally I have removed a few config variable settings which indicated no CXX compiler
as this is wrong and breaks the build when using this central cache.

 Config.in                        |    8 ++++++++
 package/Makefile.autotools.in    |    5 ++++-
 package/Makefile.in              |   28 +++++++++++++++++++++++++++-
 package/atk/atk.mk               |    2 +-
 package/directfb/directfb.mk     |    7 +------
 package/fontconfig/fontconfig.mk |    3 +++
 package/libglib2/libglib2.mk     |    2 +-
 package/libgtk2/libgtk2.mk       |    1 -
 8 files changed, 45 insertions(+), 11 deletions(-)

I would appreciate feedback on this change (I have been testing for 2-3 weeks)
But I can never test all cases!  If you enable the BR2_CONFIG_CACHE option some
Makefile.autotools.in based packages may now break - I cannot build them all.
In this case you may need to remove config options that are being hardcoded all
over the place (like gtk saying we have 2 CXX compiler) or disable the use
of CONFIG CACHE file like I have done in fontconfig.
I can build all packages required to get WebKit on DirectFB up and running
and it runs fine.
I will try to resolve any issues this creates as fast as I can.

Signed-off-by: Daniel Laird <daniel.j.laird@nxp.com>
2008-11-28 14:20:47 +00:00

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#
mainmenu "Buildroot2 Configuration"
config BR2_HAVE_DOT_CONFIG
bool
default y
config BR2_VERSION
string
default "0.10.0-svn"
source "target/Config.in.arch"
source "target/device/Config.in"
menu "Build options"
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.
NOTE: This only works for packages using the Makefile.autotools.in
config BR2_WGET
string "Wget command"
default "wget --passive-ftp -nd"
config BR2_SVN_CO
string "Subversion (svn) command to download source tree"
default "svn co"
config BR2_SVN_UP
string "Subversion (svn) command to update source tree"
default "svn up"
config BR2_GIT
string "Git command to download source tree"
default "git clone"
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_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.
config BR2_DL_DIR
string "Download dir"
default "$(BASE_DIR)/dl"
help
Directory to store all the source files that we need to fetch.
If the Linux shell environment has defined the BUILDROOT_DL_DIR
environment variable, then this overrides this configuration item.
The default is $(BASE_DIR)/dl
source "target/device/Config.in.mirrors"
config BR2_STAGING_DIR
string "Toolchain and header file location?"
default "$(BUILD_DIR)/staging_dir"
help
This is the location where the toolchain will be installed. The
toolchain will not work if it is moved from this location.
Therefore, if you wish to package up a uClibc toolchain, it is
important that is is set to the final location where the toolchain
will be used.
Most people will leave this set to the default value of
"$(BUILD_DIR)/staging_dir".
config BR2_FPU_SUFFIX
bool "Add '_nofpu' suffix for softfloat toolchains"
help
If the toolchain is configured to use softfloat, then
the "_nofpu" suffix will be added to the toolchain build
directory name and to any rootfs image name
config BR2_TOPDIR_PREFIX
string "Custom build dir prefix"
default ""
help
Add a custom string to the beginning of the build directories.
build_ARCH -> [PREFIX]_build_ARCH
toolchain_build_ARCH -> [PREFIX]_toolchain_build_ARCH
config BR2_TOPDIR_SUFFIX
string "Custom build dir suffix"
default ""
help
Add a custom string to the end of the build directories.
build_ARCH -> build_ARCH_[SUFFIX]
toolchain_build_ARCH -> toolchain_build_ARCH_[SUFFIX]
config BR2_ROOTFS_PREFIX
string "Custom root fs prefix"
default "rootfs"
help
Add a custom string to the beginning of the root file system name.
config BR2_ROOTFS_SUFFIX
string "Custom root fs suffix"
default ""
help
Add a custom string to the end of the root file system name.
config BR2_GNU_BUILD_SUFFIX
string "GNU build hostname suffix"
default "pc-linux-gnu"
help
The string used to pass to configure scripts via the
--build= option. Just specify the suffix here, the leading
arch will be filled in automatically.
Here's some copy and paste build host options for you:
linux: pc-linux-gnu
cygwin: pc-cygwin
os x: apple-darwin7 / apple-darwin8
config BR2_GNU_TARGET_SUFFIX
string "GNU target suffix"
default "linux-uclibcgnueabi" if BR2_ARM_EABI
default "linux-uclibc"
help
The string used to pass to configure scripts via the
--target= option. Just specify the suffix here, the leading
arch will be filled in automatically.
Most users will want to stick with the default setting, though
other users (most notably ARM EABI) like to add on to this in
order to stay in line with gcc conventions.
Default options are:
linux-uclibcgnueabi for ARM EABI
linux-uclibc for the rest
gnuhurd-uclibc for the hurd
config BR2_JLEVEL
int "Number of jobs to run simultaneously"
default "1"
help
Number of jobs to run simultaneously
config BR2_PREFER_IMA
bool "prefer IMA compiles"
help
Where possible, compile package with Inter Module Analysis.
This potentially uses alot of system resources on your compile
host with the benefit of creating smaller binaries for the target.
If unsure, say No.
WARNING: This is highly experimental at the moment.
config BR2_DEPRECATED
bool "Show packages that are deprecated or obsolete"
help
This option hides outdated/obsolete versions of packages.
config BR2_RECENT
bool "Show packages that are of the latest major version"
default y
help
This option show recent versions of packages.
config BR2_CONFIG_CACHE
bool "Use a central configure cache file"
default n
help
This determines if a central config cache is used by
packages, reducing the configure time for packages as each
one caches its findings.
config BR2_ENABLE_DEBUG
bool "build packages with debugging symbols"
select BR2_PACKAGE_GDB_SERVER
help
Build packages with debugging symbols
enabled
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"
default BR2_STRIP_strip
help
Select whether to strip binaries and libraries for the target
or not.
strip is the normal strip command
sstrip is a strip that discards more than the normal strip
none do not strip (only for debugging!)
config BR2_STRIP_strip
bool "strip"
depends on !BR2_ENABLE_DEBUG
help
strip is the normal strip command
config BR2_STRIP_sstrip
bool "sstrip"
select BR2_PACKAGE_SSTRIP_HOST
depends on !BR2_ENABLE_DEBUG
help
sstrip is a strip that discards more than the normal strip
config BR2_STRIP_none
bool "none"
help
none do not strip (only for debugging!)
endchoice
choice
prompt "gcc optimization level"
default BR2_OPTIMIZE_S
help
Set the optimization level for gcc
config BR2_OPTIMIZE_0
bool "optimization level 0"
depends on !BR2_PACKAGE_LINUX
help
Do not optimize. This is the default.
config BR2_OPTIMIZE_1
bool "optimization level 1"
depends on !BR2_PACKAGE_LINUX
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_PREFER_STATIC_LIB
bool "prefer static libraries"
help
Where possible, build and use static libraries for the target.
This potentially increases your code size and should only be
used if you know what you do.
The default is to build dynamic libraries and use those on
the target filesystem.
WARNING: This is highly experimental at the moment.
config BR2_HAVE_MANPAGES
bool "manpages on the target"
help
Leave the manpages on the target.
If you say n here, your target will not contain any
manpage.
config BR2_HAVE_INFOPAGES
bool "infopages on the target"
help
Leave the infopages on the target.
If you say n here, your target will not contain any
infopage.
config BR2_HAVE_DOCUMENTATION
bool "documentation on the target"
help
Leave the documentation on the target.
If you say n here, your target will not contain any
documentation.
config BR2_HAVE_DEVFILES
bool "development files in target filesystem"
help
Install headers and static libraries in the
target filesystem
source package/gnuconfig/Config.in
endmenu
source "toolchain/Config.in"
source "package/Config.in"
source "target/Config.in"
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