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zlib is not mandatory with mbedtls, only optional, however as mbedtls does not provide a pkg-config file, we assume that if zlib is available, we must link with it to avoid a build failure when linking statically with a zlib-enabled mbedtls. This change was pushed upstream with7b8efe11dband is in buildroot since the bump to version 7.1.4 with commit0c80245ddb. However, this change will raise a build failure if ZLIB_LIBRARIES is used when zlib is not found. This patch is fixing this build failure. However, it should be noted that the compression support in mbedtls is only enabled if BR2_PACKAGE_MBEDTLS_COMPRESSION=y. So we can have a situation where mbedtls is enabled, zlib is enabled, but mbedtls is not using zlib and as a result, since version 7.1.4, rttyt will needlessly link with zlib in such a situation. The only sane way to fix this is to use pkg-config, but as mbedtls apparently doesn't provide any .pc file, we leave it as it is. Fixes: - http://autobuild.buildroot.org/results/a0ebffe58bbf14cab74b7d2111d4d88a9c725273 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> 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