c56404b449
The compiler-rt project intructs to build out of tree:
https://compiler-rt.llvm.org/
Otherwise, the dependency chain declared in the include/CMakelLists.txt
causes a circular dependency of source files upon themselves:
make[4]: Circular include/sanitizer/allocator_interface.h <- include/sanitizer/allocator_interface.h dependency dropped.
make[4]: Circular include/sanitizer/asan_interface.h <- include/sanitizer/asan_interface.h dependency dropped.
make[4]: Circular include/sanitizer/common_interface_defs.h <- include/sanitizer/common_interface_defs.h dependency dropped.
[--snip 19 other files--]
This is because include/CMakeLists.txt unconctional declares
dependencies in this manner:
set(SANITIZER_HEADERS
sanitizer/allocator_interface.h
sanitizer/asan_interface.h
sanitizer/common_interface_defs.h
[...]
)
set(COMPILER_RT_HEADERS
${SANITIZER_HEADERS}
[...])
set(output_dir ${COMPILER_RT_OUTPUT_DIR}/include)
foreach( f ${COMPILER_RT_HEADERS} )
set( src ${CMAKE_CURRENT_SOURCE_DIR}/${f} )
set( dst ${output_dir}/${f} )
add_custom_command(OUTPUT ${dst}
[...]
)
[...]
endforeach( f )
The froeach() loop creates dependency rules between the files in
output_dir and CMAKE_CURRENT_SOURCE_DIR, without provision for the
case they are both the same directories, thus in-source builds are
not supported.
With the Makefiles backend, this only triggers the above warning
from make, because make arbitrarily breaks circluar dependencies, and
in this case it makes it work. But when we switch to the ninja backend,
this is going to be a hard error.
Anyway, ninja or make, compiler-rt does not support in-source builds.
Signed-off-by: Thomas Devoogdt <thomas@devoogdt.com>
[yann.morin.1998@free.fr: drastically expand commit log]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit
|
||
|---|---|---|
| arch | ||
| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| utils | ||
| .checkpackageignore | ||
| .clang-format | ||
| .defconfig | ||
| .flake8 | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .shellcheckrc | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| DEVELOPERS | ||
| Makefile | ||
| Makefile.legacy | ||
| 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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches