diff options
| -rw-r--r-- | docs/buildroot.html | 14 | ||||
| -rw-r--r-- | project/Makefile.in | 7 |
2 files changed, 21 insertions, 0 deletions
diff --git a/docs/buildroot.html b/docs/buildroot.html index 6e20d0419..89c59701b 100644 --- a/docs/buildroot.html +++ b/docs/buildroot.html @@ -217,6 +217,20 @@ <p>You can now disconnect or copy the content of your <code>dl</code> directory to the build-host. </p> + <h3><a name="building_out_of_tree" id="building_out_of_tree"></a> + Building out-of-tree</h3> + + <p>Buildroot supports building out of tree with a syntax similar + to the Linux kernel. To use it, add O=<directory> to the + make command line, E.G.:</p> + +<pre> + $ make O=/tmp/build +</pre> + + <p>And all the output files will be located under + <code>/tmp/build</code>.</p> + <h3><a name="environment_variables" id="environment_variables"></a> Environment variables</h3> diff --git a/project/Makefile.in b/project/Makefile.in index c4188505b..034b1fa6c 100644 --- a/project/Makefile.in +++ b/project/Makefile.in @@ -25,7 +25,14 @@ TAR_OPTIONS=$(subst ",, $(BR2_TAR_OPTIONS)) -xf #") +# Buildroot supports building out of tree similarly to the Linux kernel. +# To use, add O= to the make command line (make O=/tmp/build) BASE_DIR:=$(shell pwd) +ifdef O +ifeq ("$(origin O)", "command line") +BASE_DIR := $(O) +endif +endif TOPDIR_PREFIX:=$(strip $(subst ",, $(BR2_TOPDIR_PREFIX)))_ #")) |