kumquat-buildroot

NetCube-Systems-Austria/kumquat-buildroot

Go to file

Yann E. MORIN 4cd1ab1588 core: alternate solution to disable C++ Some packages that use libtool really need some love to be able to disable C++ support. This is because libtool will want to call AC_PROG_CXXCPP as soon as CXX is set non-empty to something different from 'no'. Then, AC_PROG_CXXCPP will want a C++ preprocessor that works on valid input and fail on invalid input. So, providing 'false' as the C++ compiler will then require that we do have a working C++ preprocessor. Which is totally counter-productive since we do not have a C++ compiler to start with... `bd39d11d2e` (core/infra: fix build on toolchain without C++) was a previous attempt at fixing this, by using the host's C++ preprocessor. However, that is very incorrect (that's my code, I can say so!) because the set of defines will most probably be different for the host and the target, thus causing all sorts of trouble. For example, on ARM we'd have to include different headers for soft-float vs hard-float, which is decided based on a macro, which is not defined for x86, and thus may redirect to the wrong (and missing) header. Instead, we notice that libtool uses the magic value 'no' to decide that a C++ compiler is not available, in which case it skips the call to AC_PROG_CXXCPP. Given that 'no' is not provided by any package in Debian and derivatives, as well as in Fedora, we can assume that no system will have an executable called 'no'. Hence, we use that as a magic value to disable C++ detection altogether. Fixes: #10846 (again) Reported-by: Damien Riegel <damien.riegel@savoirfairelinux.com> Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Damien Riegel <damien.riegel@savoirfairelinux.com> Cc: Peter Seiderer <ps.report@gmx.net> Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Cc: Peter Korsgaard <peter@korsgaard.com> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Tested-by: Peter Seiderer <ps.report@gmx.net> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>		2018-03-30 14:22:49 +02:00
arch	arch: add Atom CPUs as Silvermont Architecture target	2018-01-01 13:05:16 +01:00
board	configs/arcturus_ucls1012a: new defconfig	2018-03-26 22:38:16 +02:00
boot	uboot: fix build for older uboot source trees	2018-03-12 23:50:17 +01:00
configs	configs/atmel: bump to linux4sam_5.8	2018-03-30 08:28:07 +02:00
docs	package/pkg-generic: add the concept of extract dependency	2018-03-25 17:43:07 +02:00
fs	package/pkg-generic: handle host-tar as an extract dependency	2018-03-25 17:43:20 +02:00
linux	linux: bump default to version 4.15.14	2018-03-29 15:36:52 +02:00
package	core: alternate solution to disable C++	2018-03-30 14:22:49 +02:00
support	core: kill DEPENDENCIES_HOST_PREREQ	2018-03-25 17:52:06 +02:00
system	systemd: allow to build with uClibc toolchains	2018-02-14 21:31:17 +01:00
toolchain	toolchain: fix detection of SSP support	2018-03-25 22:52:33 +02:00
utils	scanpypi: fix code style	2018-03-13 22:32:01 +01:00
.defconfig
.flake8	.flake8: ignore utils/diffconfig	2018-03-13 22:37:54 +01:00
.gitignore
.gitlab-ci.yml	configs/arcturus_ucls1012a: new defconfig	2018-03-26 22:38:16 +02:00
.gitlab-ci.yml.in	gitlab-ci: use new, tagged image	2018-02-05 22:38:30 +01:00
CHANGES	Update for 2018.02	2018-03-04 22:28:34 +01:00
Config.in	Config.in: Document BR2_CCACHE_DIR override	2018-03-26 22:26:02 +02:00
Config.in.legacy	linux-headers: drop old unsupported 3.x versions	2018-02-04 00:02:35 +01:00
COPYING
DEVELOPERS	configs/arcturus_ucls1012a: new defconfig	2018-03-26 22:38:16 +02:00
Makefile	Makefile: fix build break in sdk target	2018-03-26 10:48:19 +02:00
Makefile.legacy
README

README

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