[Buildroot] [PATCH 2/3] cmake: add documentation about how it is built
Yann E. MORIN
yann.morin.1998 at free.fr
Sat Jul 2 14:48:08 UTC 2016
Luca, All,
On 2016-07-01 17:53 +0200, Luca Ceresoli spake thusly:
> Commit 7b17bafc5d7948aff3059e058ada80ad1fc50500 by Davide Viti has a
> detailed explanation of some unusual techniques used for building
> host-cmake and (target-)cmake. This is useful information for whoever
> starts hacking on it, so copy it in the makefile, where it will be
> easily noticed.
>
> Also remove the sentence about host-cmake having a runtime dependency
> on host-pkgconfig (not true anymore: it's the specific cmake-packages
> that depend on it) and fix typos.
>
> Signed-off-by: Luca Ceresoli <luca at lucaceresoli.net>
> Cc: Samuel Martin <s.martin49 at gmail.com>
> Cc: Davide Viti <zinosat at tiscali.it>
> Cc: Arnout Vandecappelle <arnout at mind.be>
> Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Regards,
Yann E. MORIN.
> ---
> package/cmake/cmake.mk | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/package/cmake/cmake.mk b/package/cmake/cmake.mk
> index 33fb4aa..d734e03 100644
> --- a/package/cmake/cmake.mk
> +++ b/package/cmake/cmake.mk
> @@ -10,6 +10,18 @@ CMAKE_SITE = https://cmake.org/files/v$(CMAKE_VERSION_MAJOR)
> CMAKE_LICENSE = BSD-3c
> CMAKE_LICENSE_FILES = Copyright.txt
>
> +# CMake is a particular package:
> +# * CMake can be built using the generic infrastructure or the cmake one.
> +# Since Buildroot has no requirement regarding the host system cmake
> +# program presence, it uses the generic infrastructure to build the
> +# host-cmake package, then the (target-)cmake package can be built
> +# using the cmake infrastructure;
> +# * CMake bundles its dependencies within its sources. This is the
> +# reason why the host-cmake package has no dependencies:, whereas
> +# the (target-)cmake package has a lot of dependencies, using only
> +# the system-wide libraries instead of rebuilding and statically
> +# linking with the ones bundled into the CMake sources.
> +
> HOST_CMAKE_DEPENDENCIES =
> CMAKE_DEPENDENCIES = zlib jsoncpp libcurl libarchive expat bzip2 xz
>
> --
> 2.7.4
>
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