{"enrichment":{"faq":[{"a":"linkers-lto teaches you how to master linker selection, essential flags, and link-order resolution for GNU ld, gold, and lld. You'll learn to enable LTO with GCC or Clang, strip dead code with --gc-sections, and debug common linker errors like undefined symbols and circular dependencies.","q":"What does linkers-lto cover?"},{"a":"linkers-lto addresses undefined reference errors by teaching link-order resolution and proper library linking. Common causes include incorrect library order (libraries must come after object files that use them), missing libraries, or circular dependencies. Use -Wl,--start-group and -Wl,--end-group to handle circular deps, and check your linker map file to verify symbol resolution.","q":"How do I fix an undefined reference linker error?"},{"a":"linkers-lto shows how to enable full or thin LTO for production builds. Add -flto to both compilation and linking flags with GCC or Clang. For thin LTO (faster), use -flto=thin. When using archives, use gcc-ar and gcc-ranlib instead of standard ar and ranlib to preserve LTO metadata. Enable LTO consistently across all object files and libraries.","q":"How do I enable LTO in my C++ project?"},{"a":"linkers-lto covers choosing and configuring the right linker for your needs. GNU ld is the default but slower; gold is faster for large projects; lld is the fastest modern option. Select gold with -fuse-ld=gold or lld with -fuse-ld=lld. Performance depends on project size and complexity, so benchmark your specific build to decide.","q":"Which linker is fastest: gcc ld, gold, or lld?"},{"a":"linkers-lto teaches dead-code stripping via section garbage collection. Compile with -ffunction-sections -fdata-sections to place each function and data item in its own section, then link with -Wl,--gc-sections to remove unused sections. This significantly reduces binary size in production builds by eliminating unreachable code and unused data.","q":"How can I reduce binary size with gc-sections?"},{"a":"linkers-lto explains LTO trade-offs for informed production decisions. LTO enables whole-program optimization and better dead-code elimination, improving performance and reducing size. However, it increases compilation time substantially and requires more memory during linking. Thin LTO offers a middle ground with faster builds than full LTO but less optimization.","q":"What are the trade-offs of link time optimization?"}],"shadow_tags":["inter-module-optimization","binary-stripping","symbol-resolution","link-stage-errors","linker-selection","code-elimination","relocation-handling","archive-management"],"summary_rewrite":"Master linker selection, essential flags, and link-order resolution for GNU ld, gold, and lld. Learn to enable LTO with GCC or Clang, strip dead code with --gc-sections, and debug common linker errors like undefined symbols and circular dependencies."},"files":[{"bytes":5652,"path":"skills/binaries/linkers-lto/SKILL.md","sha256":"07db69a80336403f7b74a07e75a2a30bd33b1b3bd3c4f1ce0e585b2bff5714a5","url":"https://skillfed.io/files/mohitmishra786/low-level-dev-skills/linkers-lto/1408b39b/SKILL.md"}],"id":"mohitmishra786/low-level-dev-skills/linkers-lto","links":{"html":"https://skillfed.io/mohitmishra786/low-level-dev-skills/linkers-lto","md":"https://skillfed.io/mohitmishra786/low-level-dev-skills/linkers-lto.md","repo":"https://github.com/mohitmishra786/low-level-dev-skills"},"meta":{"agents_supported":[],"first_seen":"2026-07-28","forks":19,"language":"JavaScript","last_updated":"2026-06-27","license":"MIT","name":"linkers-lto","publisher":"mohitmishra786","stars":148},"relations":{"similar":[{"id":"mohitmishra786/low-level-dev-skills/gcc"},{"id":"mohitmishra786/low-level-dev-skills/clang"},{"id":"mohitmishra786/low-level-dev-skills/binary-hardening"},{"id":"mohitmishra786/low-level-dev-skills/resource-optimization-lowend"},{"id":"mohitmishra786/low-level-dev-skills/dwarf-debug-format"},{"id":"mohitmishra786/low-level-dev-skills/compiler-optimizations-deep"},{"id":"mohitmishra786/low-level-dev-skills/rust-build-times"},{"id":"mohitmishra786/low-level-dev-skills/pgo"},{"id":"mohitmishra786/low-level-dev-skills/binutils"},{"id":"mohitmishra786/low-level-dev-skills/ninja"}]},"slug":{"owner":"mohitmishra786","repo":"low-level-dev-skills","skill":"linkers-lto"},"version":"1408b39b"}