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2da6c5d2df
The kconfig build logic uses the HOSTCC variable to find the host
compiler. It makes sense to explicitly pass a value to this variable,
pointing to the host compiler used by Buildroot.
During the kconfig step, host-ccache is not ready (host-ccache is only
a dependency to the configure step of packages), so we use
$(HOSTCC_NOCCACHE).
Packages currently using the kconfig-package fell into two categories:
- Those not passing any HOSTCC value. For such packages, it was the
default host compiler detected by the kconfig build logic that was
used. ccache was therefore never used. With this commit, those
packages will now be using the host compiler detected by
Buildroot. Packages in this situation: at91bootstrap3, barebox,
busybox, swupdate, uclibc, xvisor.
- Those passing a HOSTCC value. Such packages were passing $(HOSTCC),
which doesn't work as host-ccache will not be ready. This commit
does not fix them, as they still override HOSTCC. It will be fixed
in followup commits. Packages in this situation: uboot and
linux. Note that linux was a bit special, because it has a
KCONFIG_DEPENDENCIES on the toolchain package, so in fact
host-ccache was ready.
So practically speaking, this commit does not fix anything, as the two
only problematic packages that use $(HOSTCC) are not fixed. However,
it makes things more correct by explicitly telling kconfig which
compiler to use.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 28aa05dd95)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches