Commit 2b0f4552 authored by Yann E. MORIN's avatar Yann E. MORIN Committed by Peter Korsgaard
Browse files

Makefile: export a few variables to help support scripts 



Support scripts (in support/) may need to parse the .config file, so give
them an easy access to it, by exporting BUILDROOT_CONFIG with the fully-
qualified path to .config.

Also, post-build scripts may need to reference a few locations, so export
those, too.

Note: we export both O and BASE_DIR. Although they are the same, BASE_DIR
is used internally, while O is used on the command line, which makes it a
bit ambiguous to know which to use. As users use O= on the command line,
they will probably tend to use that in their post-build scripts.

Update doc accordingly.

[Peter: fixed typo]
Signed-off-by: default avatar"Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
cc: Peter Korsgaard <jacmet@uclibc.org>
Signed-off-by: default avatarPeter Korsgaard <jacmet@sunsite.dk>
parent 76686243

Makefile

+11 −0
Original line number Diff line number Diff line
@@ -91,6 +91,8 @@ EXTRAMAKEARGS = O=$(O) 
NEED_WRAPPER=y

endif



BUILDROOT_CONFIG=$(CONFIG_DIR)/.config



# Pull in the user's configuration file

ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)

-include $(CONFIG_DIR)/.config
@@ -282,6 +284,15 @@ HOSTCC := $(CCACHE) $(HOSTCC) 
HOSTCXX := $(CCACHE) $(HOSTCXX)

endif



# Scripts in support/ or post-build scripts may need to reference

# these locations, so export them so it is easier to use

export BUILDROOT_CONFIG

export TARGET_DIR

export STAGING_DIR

export HOST_DIR

export BINARIES_DIR

export BASE_DIR O   # O and BASE_DIR are the same



#############################################################

#

# You should probably leave this stuff alone unless you know

docs/manual/customize-rootfs.txt

+7 −0
Original line number Diff line number Diff line
@@ -37,6 +37,13 @@ there are a few ways to customize the resulting target filesystem. 
  certain package generates wrong or unneeded files, you should fix

  that package rather than work around it with a post-build cleanup

  script. _Among these first 3 methods, this one should be preferred_.

  You may also use these variables in your post-build script:

    - +BUILDROOT_CONFIG+: the path to the Buildroot .config file

    - +HOST_DIR+, +STAGING_DIR+, +TARGET_DIR+: see

      xref:generic-package-reference[]

    - +BINARIES_DIR+: the place where all binary files (aka images) are

      stored

    - +BASE_DIR+ (or +O+): the base output directory



* A special package, 'customize', stored in +package/customize+ can be

  used. You can put all the files that you want to see in the final