292949c638
Historically, Buildroot has defaulted to -Os as the gcc optimization flags. However, this default is probably not the most appropriate anymore, and this commit therefore changes the default to -O2. Here are some arguments in favor of this change: - Most Buildroot users use Buildroot for platforms that have a reasonable amount of storage, and the difference between -Os and -O2 in terms of code size is no longer as significant compared to the size of storage available on average embedded Linux devices typically found these days. - -Os can have a pretty bad performance impact, compared to -O2. - -Os is much less widely tested than -O2. For example, with recent versions of gcc, there are parts of Qt5 that segfault when compiled with -Os and work perfectly fine with -O2. Yes, it's a compiler bug that should be fixed, but in the mean time, having a default that's more widely used/tested makes sense. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Acked-by: Yann E. MORIN <yann.morin.1998@free.fr> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> |
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| arch | ||
| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| utils | ||
| .checkpackageignore | ||
| .clang-format | ||
| .defconfig | ||
| .editorconfig | ||
| .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