TL;DR
Zig has announced a reworked build system that separates the maker and configurer processes, boosting build speeds. Additionally, the new ELF linker now supports fast incremental compilation, enhancing development workflows on Linux.
Zig has released major updates to its build system and ELF linker, significantly enhancing build speed and incremental compilation support for Linux users. These changes aim to improve developer productivity and enable faster iteration cycles.
On May 26, 2026, Zig announced a rework of its build system, splitting the process into a small ‘configurer’ process and a separate ‘maker’ process, which is compiled with optimizations and cached. This change reduces build times by avoiding re-compilation of the entire build system for each change, especially benefiting features like –watch, –fuzz, and –webui.
Simultaneously, the new ELF linker, initially introduced in Zig 0.16.0, has seen significant progress. It now supports building the self-hosted Zig compiler with LLVM and LLD libraries enabled, and offers fast incremental rebuilds on x86_64 Linux. This allows developers to rebuild projects in milliseconds, particularly useful during debugging and print statement testing. However, support for DWARF debug information is still under development.
Why It Matters
These updates are important because they directly impact developer productivity and the efficiency of large or complex Zig projects. Faster build times and instant rebuilds reduce iteration cycles, making Zig more competitive for systems programming and rapid development tasks. The build system rework also lays groundwork for future feature expansion without degrading performance.
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Background
Earlier in 2026, Zig’s development focused on improving build performance and tooling. The build system rework was previewed in May, following prior enhancements to the ELF linker, which initially supported only Zig-only code. The new linker now supports external libraries and C sources, with ongoing improvements such as debug info support. These developments reflect Zig’s ongoing efforts to improve its build and linking capabilities for Linux users.
“The new build system separates the maker process from the configurer, making builds faster and more scalable.”
— Andrew Kelley
“The ELF linker now supports fast incremental rebuilds on Linux, enabling developers to rebuild in milliseconds.”
— Matthew Lugg
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What Remains Unclear
It is not yet clear when full DWARF debug information support will be available in the ELF linker. Additionally, the full impact of the build system changes on large-scale projects remains to be seen as more users adopt the new architecture.
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What’s Next
Next steps include finalizing DWARF debug info support for the ELF linker and encouraging adoption among Zig developers. Future releases are likely to include further optimizations and additional build system features, with Zig 0.17.0 expected to incorporate some of these improvements.
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Key Questions
When will DWARF debug info support be available in Zig’s ELF linker?
It is currently under development, with no specific release date announced. It remains a priority for future updates.
How much faster are builds with the new system?
Initial benchmarks show significant reductions, with some rebuilds completing in under 300 milliseconds, compared to several seconds previously.
Will these updates affect existing Zig projects?
Most existing projects should benefit from the performance improvements without requiring changes, though some features like incremental linking may require updates or configuration adjustments.
Is the new build system compatible with all Zig features?
Compatibility is expected to be broad, but some advanced features may still be undergoing testing. Developers are encouraged to test their projects and report issues.
Source: Hacker News
