6f8162cf8c
HOST_CFLAGS includes a search path for HOST_DIR/usr/include using -I. When HOST_CFLAGS is used by a package, these flags are passed to the compiler ahead of flags passed by the package's internal make system. If a package has a header file with the same name as a header file in HOST_DIR, this causes the toolchain to prefer the file from the system include directory because its -I appears first on the command line. Conflicts should prefer the file provided by the package. This can be accomplished by using -isystem, which is more appropriate then -I for system-level include paths. Real-world example: libfdt might be installed in HOST_DIR to install a patched version of QEMU that does not bundle libfdt. Meanwhile, the u-boot package provides its own copy of libfdt.h that is modified from upstream. If libfdt is also installed into HOST_DIR, then host-uboot-tools fails to build because it grabs the libfdt.h from the HOST_DIR area instead of using the patched version from its own source tree. This patch corrects this issue. This assumes the -isystem flag is supported by the host compiler, which is the case since gcc 3.0 at least. Signed-off-by: David Raeman <draeman@bbn.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> |
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| arch | ||
| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| .defconfig | ||
| .gitignore | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| 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 Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches