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Fallback to fat LTO for -Clto=thin in cg_gcc - #153503
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Fallback to no LTO doesn't work in practice as Cargo asks rustc to produce LTO-only rlibs with -Clinker-plugin-lto without providing any indication if they will be used for thin or fat LTO, so we can't disable -Clinker-plugin-lto for ThinLTO when using cg_gcc.
antoyo
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Mar 6, 2026
bjorn3
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…uwer Rollup of 5 pull requests Successful merges: - #149937 (spliit out `linker-info` from `linker-messages`) - #153503 (Fallback to fat LTO for -Clto=thin in cg_gcc) - #153346 (move never type tests to subdirectories and add some comments) - #153371 (Fix LegacyKeyValueFormat report from docker build: arm) - #153508 (Clean up the eager formatting API)
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Rollup merge of #153503 - bjorn3:cg_gcc_thin_lto_fallback, r=antoyo Fallback to fat LTO for -Clto=thin in cg_gcc Fallback to no LTO doesn't work in practice as Cargo asks rustc to produce LTO-only rlibs with -Clinker-plugin-lto without providing any indication if they will be used for thin or fat LTO, so we can't disable -Clinker-plugin-lto for ThinLTO when using cg_gcc. r? @antoyo
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Fallback to no LTO doesn't work in practice as Cargo asks rustc to produce LTO-only rlibs with -Clinker-plugin-lto without providing any indication if they will be used for thin or fat LTO, so we can't disable -Clinker-plugin-lto for ThinLTO when using cg_gcc.
r? @antoyo