Issues stemming from GCC 15 seem to be surfacing elsewhere, too. Consider the packages overview for the Debian LEGO team. * https://qa.debian.org/developer.php?email=debian-lego-team%40lists.alioth.debian.org
Package gcc-h8300-hms shows Buildd failing on sh4. Taking a closer look at that, and it was okay until comparatively recently: * https://buildd.debian.org/status/logs.php?pkg=gcc-h8300-hms&arch=sh4 Log from the last "successful" build on 2025-04-10: * https://buildd.debian.org/status/fetch.php?pkg=gcc-h8300-hms&arch=sh4&ver=1%3A3.4.6%2Bdfsg2-7&stamp=1744322988&raw=0 Log from the next subsequent failed build on 2025-09-07: * https://buildd.debian.org/status/fetch.php?pkg=gcc-h8300-hms&arch=sh4&ver=1%3A3.4.6%2Bdfsg2-8&stamp=1757254675&raw=0 In each of those logs, scroll down to the "Build environment" section and note a key difference in the "Toolchain package versions" listed for each: * Succeeding 2024-04-10 build: GCC 14 * Failing 2025-09-07 build: GCC 15 Furthermore, the error given for the 2025-09-07 build failure is an Internal Compiler Error: ``` qemu: uncaught target signal 11 (Segmentation fault) - core dumped gcc: internal compiler error: Segmentation fault signal terminated program cc1 Please submit a full bug report, with preprocessed source (by using -freport-bug). See <file:///usr/share/doc/gcc-15/README.Bugs> for instructions. ``` For the issues I've observed (referenced by the preceding message in this bug report), I have listed some of my findings at the link below. * https://github.com/BrickBot/GNU-Legacy-Toolchain/issues/14 Briefly from that GitHub link, here is a short code snippet that will fail compilation: ``` C struct S { ~S(); }; void bar(); void foo() { S s; bar(); } ``` If I drop the optimization level from -O2 to -O1, the problems encountered when using GCC 15 to build GCC 3.4.6 seem to go away. Matthew
