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GCC 12 provides `-D_FORTIFY_SOURCE=3`[^1] which is default on Ubuntu 24.04[^2]. This allows similar hardening level for Homebrew's glibc. [^1]: https://best.openssf.org/Compiler-Hardening-Guides/Compiler-Options-Hardening-Guide-for-C-and-C++.html#-D_FORTIFY_SOURCE=3 [^2]: https://wiki.ubuntu.com/ToolChain/CompilerFlags#A-D_FORTIFY_SOURCE.3D3
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Pull request overview
This PR updates the GCC bootstrap build script to use a newer GCC release and to reduce the resulting artifact size by stripping installed binaries, in service of aligning toolchain hardening capabilities with modern distro defaults.
Changes:
- Bump GCC version from 10.5.0 to 12.5.0 (and update the tarball SHA256).
- Use
make install-stripinstead ofmake installto strip binaries during install.
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p-linnane
approved these changes
Aug 3, 2026
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Draft to test out newer GCC to align binary hardening with modern distros' glibc. Also want to see tarball size if we strip binaries on install.
GCC 12 provides
-D_FORTIFY_SOURCE=31 which is default on Ubuntu 24.042. This allows similar hardening level for Homebrew's glibc.Footnotes
https://best.openssf.org/Compiler-Hardening-Guides/Compiler-Options-Hardening-Guide-for-C-and-C++.html#-D_FORTIFY_SOURCE=3 ↩
https://wiki.ubuntu.com/ToolChain/CompilerFlags#A-D_FORTIFY_SOURCE.3D3 ↩