|author||Bernhard Reutner-Fischer <email@example.com>||2005-10-05 07:40:46 +0000|
|committer||Bernhard Reutner-Fischer <firstname.lastname@example.org>||2005-10-05 07:40:46 +0000|
- fix building out-of-tree;
to test, checkout the source (let's assume /scratch/src/busybox), then mkdir /tmp/bb ; cd /tmp/bb make top_srcdir=/scratch/src/busybox O="$(pwd)" -f /scratch/src/busybox/Makefile allyesconfig check - default to O=$(pwd) if no O was specified. Now you can just specify the top_srcdir (without O=/somewhere) to create the obj-tree in pwd. - make "make configtarget buildtarget" work. Previously this didn't work due to how HAVE_DOT_CONFIG was evaluated. Two separate steps were needed before, e.g. make config ; make busybox. - remove some unneeded variables from Rules.mak (BB_SRC_DIR from Mr. email@example.com) which suggest that the stuff fixed above didn't work before. - move selinux libraries to where they belong (from Makefile to Rules.mak) - update the docs to mention svn instead of cvs and provide an example for building out-of-tree in INSTALL.
Diffstat (limited to 'INSTALL')
1 files changed, 42 insertions, 6 deletions
@@ -1,14 +1,50 @@
+You will usually build in the source-tree.
+Alternatively you can build out-of-tree to have the object files separated
+from the source. This allows for building several different configurations
+from the same set of sources.
+A) Building in the source-tree:
1) Run 'make config' or 'make menuconfig' and select the
functionality that you wish to enable.
2) Run 'make'
-3) Go get a drink of water, drink a soda, visit the bathroom,
- or whatever while it compiles. It doesn't take very
- long to compile, so you don't really need to waste too
- much time waiting...
-4) Run 'make install' or 'make PREFIX=/target install' to
+3) Run 'make install' or 'make PREFIX=/target install' to
install busybox and all the needed links. Some people
will prefer to install using hardlinks and will instead
want to run 'make install-hardlinks'....
+B) Building out-of-tree:
+1) make the directory to hold the object files and chdir to it:
+ 'mkdir /tmp/bb ; cd /tmp/bb'
+ Then prepare the config giving the full path to the source in top_srcdir:
+ make top_srcdir=/path/busybox -f /path/busybox/Makefile O=/tmp/b allyesconfig
+ Note that O=$(pwd) is the default if no O= was specified.
+ You now have a buildable tree in $O and can run 'make' without the need
+ to specify any paths.
+ Proceed with step #A2 above.
+After the build is complete, a busybox.links file is generated. This is
+used by 'make install' to create symlinks to the BusyBox binary for all
+compiled in functions. By default, 'make install' will place the symlink
+forest into `pwd`/_install unless you have defined the PREFIX environment
+variable (i.e., 'make PREFIX=/tmp/foo install')
+If you wish to install hard links, rather than symlinks, you can use
+'make PREFIX=/tmp/foo install-hardlinks' instead.