Fix build with modern host toolchains (GCC 15, CMake 4.x)#1978
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widgetii merged 1 commit intoOpenIPC:masterfrom Apr 3, 2026
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Fix build with modern host toolchains (GCC 15, CMake 4.x)#1978widgetii merged 1 commit intoOpenIPC:masterfrom
widgetii merged 1 commit intoOpenIPC:masterfrom
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Set CMAKE_POLICY_VERSION_MINIMUM=3.5 globally to fix CMake 4.x rejecting packages with cmake_minimum_required < 3.5 (e.g. host-lzo-2.10). Older CMake versions ignore this environment variable. Add m4 global patch to disable gnulib's C23 [[__nodiscard__]] attribute path that breaks with GCC 15's default -std=gnu23. Falls back to the equivalent __attribute__((warn_unused_result)). Both fixes are backward compatible with the Ubuntu CI environment. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
CMAKE_POLICY_VERSION_MINIMUM=3.5in Makefile to fix host package build failures with CMake 4.x (e.g. host-lzo-2.10 usescmake_minimum_required(VERSION 3.0)which CMake 4.x rejects)_GL_ATTRIBUTE_NODISCARDcompile error with GCC 15 (defaults to C23, where[[__nodiscard__]]attribute syntax doesn't work in all positions)Context
Modern distributions (e.g. Arch Linux) ship GCC 15 and CMake 4.x, which break the Buildroot 2024.02.10 host tool build. These two minimal fixes restore compatibility while remaining invisible to existing Ubuntu CI:
CMAKE_POLICY_VERSION_MINIMUMenv var was introduced in CMake 4.0 — older versions ignore itTest plan
hi3516ev300_litesucceeds on Arch Linux (GCC 15.2.1, CMake 4.3.1)🤖 Generated with Claude Code