about compile process
Generated on 8/22/2024
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The compilation process in Xcode 16 has been enhanced with the introduction of explicitly built modules. This approach involves splitting the compilation of each source file into three distinct phases: scanning, building modules, and finally compiling the original code. This change allows the build system to be more efficient and reliable by making it aware of the module graph, which helps in scheduling tasks more effectively.
Explicitly built modules are now used for all C and Objective-C code, and can be enabled for Swift as well. This results in a more detailed breakdown of the build process, better parallelism, and clearer error messages if a build fails due to a module issue. The build logs now show separate tasks for scanning dependencies and compiling modules, which were previously implicit parts of the compilation process.
For more details, you can refer to the session Demystify explicitly built modules (05:55) which explains the process in depth.
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Demystify explicitly built modules
Explore how builds are changing in Xcode 16 with explicitly built modules. Discover how modules are used to build your code, how explicitly built modules improve transparency in compilation tasks, and how you can optimize your build by sharing modules across targets.