[PATCHv3] ccache: update to 4.1

[Hannu Nyman]

Rosen Penev kirjoitti 23.12.2020 klo 8.33:
> Upstream switched to building with CMake. Adjust accordingly.
>
> Reapplied patch as upstream changed the file format.
>
> Added HOST_BUILD_PARALLEL for faster compilation.
>
> Added cmake tool dependency.
>
> Adjusted dependent tools to use NOCACHE as they are needed to build
> ccache.
>
> Signed-off-by: Rosen Penev <rosenp at gmail.com>
> ---
>   v3: zstd was missing in the commit for some reason
>   v2: fix compilation issues without OS tools.
>   tools/Makefile                              |  1 +
>   tools/ccache/Makefile                       | 17 +++++++++--------
>   tools/ccache/patches/100-honour-copts.patch | 20 ++++++++++----------
>   tools/libressl/Makefile                     |  1 +
>   tools/pkgconf/Makefile                      |  2 ++
>   tools/zstd/Makefile                         |  1 +
>   6 files changed, 24 insertions(+), 18 deletions(-)
>
> diff --git a/tools/Makefile b/tools/Makefile
> index c66d4fb991..316ffb5ea6 100644
> --- a/tools/Makefile
> +++ b/tools/Makefile
> @@ -82,6 +82,7 @@ endif
>   ifneq ($(CONFIG_CCACHE)$(CONFIG_SDK),)
>   $(foreach tool, $(filter-out xz patch,$(tools-y)), $(eval $(curdir)/$(tool)/compile += $(curdir)/ccache/compile))
>   tools-y += ccache
> +$(curdir)/ccache/compile := $(curdir)/cmake/compile $(curdir)/zstd/compile
>   endif
>   
>   # in case there is no patch tool on the host we need to make patch tool a
>

I am not sure if that is right. The v3 patch may create a circular dependency.

* First, on line 83 all tools except xz and patch (and flock, sed and tar 
that are later handled separately) are marked to depend on ccache. This 
includes cmake.

* Then the new addition to the next line makes ccache to depend on cmake.

Sounds circular to me.


Maybe we need to filter out also cmake on line 83 (in addition to xz and patch).