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enscript currently fails to build with musl with gcc >= 15. In order to fix this, we need to bring a number of patches from upstream, and add 2 others that were submitted upstream. From upstream, we bring 0002-Add-CFLAG-std-c89-so-it-compiles-with-the-old-standa.patch, which switches to -std=c89 to get the compiler back to "old" behavior. However, as this commit patches configure.ac, we need to autoreconf, but autoreconf is broken, so we also take 0003-Automake-1.12-and-up-no-longer-supports-pre-ANSI.patch from upstream, which drops a problematic autoconf macro. However, once you drop this problematic autoconf macro, the PROTOTYPES define is never set by anything, causing the __P macro to no longer be defined properly. This is fixed by 0004-Fix-prototype-detection-when-__STDC__-is-defined-but.patch that we have submitted upstream. Once you're there, you realize that switching to -std=c89 has the side effect that musl's <limits.h> no longer defines PATH_MAX, because it needs one of: #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE) and a side effect of -std=c89 is that none of these is defined anymore. So we introduce 0005-Use-std-gnu89-instead-of-std-c89.patch, which switches to -std=gnu89. This patch has also been submitted upstream. With all of these efforts, we get a successful build on musl with gcc >= 15. This commit needs to be backported to Buildroot versions that support gcc 15.x, so that means the currently maintained 2026.x branches, but not 2025.02 as only up to gcc 14.x was supported then. Fixes: https://autobuild.buildroot.org/results/d39d14bbbb3a51d67fe962b877c7f66ff1204ecf/ Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Julien Olivain <ju.o@free.fr>
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 https://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