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authorGravatar Charlie Turner <cturner@igalia.com>2019-05-13 11:37:42 +0100
committerGravatar Thomas Petazzoni <thomas.petazzoni@bootlin.com>2019-05-13 20:49:19 +0200
commit59c3a4ff73e5a8d4cfcb95bbd0ac07a68628e954 (patch)
tree138d6678a89e8ec1d6756b330e63c8ef0d772e0c /docs
parentcde99db79a6801e1e6fe48cf75cab65d5860c351 (diff)
downloadbuildroot-59c3a4ff73e5a8d4cfcb95bbd0ac07a68628e954.tar.gz
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docs/manual: clarify location of local.mk
In particular, the manual was incorrect when the user had selected an out-of-tree build. Signed-off-by: Charlie Turner <cturner@igalia.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Diffstat (limited to 'docs')
-rw-r--r--docs/manual/using-buildroot-development.txt20
1 files changed, 16 insertions, 4 deletions
diff --git a/docs/manual/using-buildroot-development.txt b/docs/manual/using-buildroot-development.txt
index 3389a37b39..65a9f1a3f7 100644
--- a/docs/manual/using-buildroot-development.txt
+++ b/docs/manual/using-buildroot-development.txt
@@ -28,10 +28,22 @@ clean+.
Therefore, Buildroot provides a specific mechanism for this use case:
the +<pkg>_OVERRIDE_SRCDIR+ mechanism. Buildroot reads an _override_
file, which allows the user to tell Buildroot the location of the
-source for certain packages. By default this _override_ file is named
-+local.mk+ and located in the top directory of the Buildroot source
-tree, but a different location can be specified through the
-+BR2_PACKAGE_OVERRIDE_FILE+ configuration option.
+source for certain packages.
+
+The default location of the override file is +$(CONFIG_DIR)/local.mk+,
+as defined by the +BR2_PACKAGE_OVERRIDE_FILE+ configuration option.
++$(CONFIG_DIR)+ is the location of the Buildroot +.config+ file, so
++local.mk+ by default lives side-by-side with the +.config+ file,
+which means:
+
+* In the top-level Buildroot source directory for in-tree builds
+ (i.e., when +O=+ is not used)
+* In the out-of-tree directory for out-of-tree builds (i.e., when
+ +O=+ is used)
+
+If a different location than these defaults is required, it can be
+specified through the +BR2_PACKAGE_OVERRIDE_FILE+ configuration
+option.
In this _override_ file, Buildroot expects to find lines of the form: