Sergei Trofimovich 537176760c gcc12, gcc13: always mangle __FILE__ into invalid store path ... Without the change `__FILE__` used in static inline functions in headers embed paths to header files into executable images. For local headers it's not a problem, but for headers in `/nix/store` this causes `-dev` inputs to be retained in runtime closure. Typical examples are `nix` -> `nlonhmann_json` and `pipewire` -> `lttng-ust.dev`. Ideally we would like to use `-fmacro-prefix-map=` feature of `gcc` as: -fmacro-prefix-map=/nix/store/$hash1-nlohmann-json-ver=/nix/store/eeee.eee-nlohmann-json-ver -fmacro-prefix-map=/nix/... In practice it quickly exhausts argument lengtth limit due to `gcc` deficiency: https://gcc.gnu.org/PR111527 Until it;s fixed let's hardcode header mangling if $NIX_STORE variable is present in the environment. Tested as: $ printf "# 0 \"/nix/store/01234567890123456789012345678901-pppppp-vvvvvvv\" \nconst char * f(void) { return __FILE__; }" | NIX_STORE=/nix/store ./gcc/xgcc -Bgcc -x c - -S -o - ... .string "/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-pppppp-vvvvvvv" ... Mangled successfully.		2023-10-04 21:16:13 +01:00
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mangle-NIX_STORE-in-__FILE__.patch
no-sys-dirs-riscv.patch