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https://github.com/NixOS/nixpkgs.git
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649ebfbed6
In https://github.com/NixOS/nixpkgs/issues/158042 I noticed order mismatch as a bootstrap build failure when building x86_64-linux against glibc-2.35 in nixpkgs (bootstrap libs has glibc-2.27): expand-response-params> ld: /nix/store/p4s4jf7aq6v6z9iazll1aiqwb34aqxq9-bootstrap-tools/lib/crt1.o: in function `_start': expand-response-params> /build/glibc-2.27/csu/../sysdeps/x86_64/start.S:101: undefined reference to `__libc_csu_fini' expand-response-params> ld: /build/glibc-2.27/csu/../sysdeps/x86_64/start.S:102: undefined reference to `__libc_csu_init' expand-response-params> collect2: error: ld returned 1 exit status Here crt1.o from glibc-2.27 links against libc.so.6 from glibc-2.35. This happens because ordering of `-L` (influences `libc.so` lookup) and `-B` (influences `crt1.o` lookup) flags differs: expand-response-params> -B/...-bootstrap-tools/lib expand-response-params> -B/...-glibc-2.35/lib/ ... expand-response-params> -L/...-glibc-2.35/lib expand-response-params> -L/...-bootstrap-tools/lib The change makes consistent ordering of `-L`/`-B` and allows getting to stage4 for `glibc-2.35` target.
88 lines
3.4 KiB
Bash
88 lines
3.4 KiB
Bash
# N.B. It may be a surprise that the derivation-specific variables are exported,
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# since this is just sourced by the wrapped binaries---the end consumers. This
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# is because one wrapper binary may invoke another (e.g. cc invoking ld). In
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# that case, it is cheaper/better to not repeat this step and let the forked
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# wrapped binary just inherit the work of the forker's wrapper script.
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var_templates_list=(
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NIX_CFLAGS_COMPILE
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NIX_CFLAGS_COMPILE_BEFORE
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NIX_CFLAGS_LINK
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NIX_CXXSTDLIB_COMPILE
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NIX_CXXSTDLIB_LINK
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NIX_GNATFLAGS_COMPILE
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)
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var_templates_bool=(
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NIX_ENFORCE_NO_NATIVE
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)
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accumulateRoles
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# We need to mangle names for hygiene, but also take parameters/overrides
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# from the environment.
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for var in "${var_templates_list[@]}"; do
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mangleVarList "$var" ${role_suffixes[@]+"${role_suffixes[@]}"}
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done
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for var in "${var_templates_bool[@]}"; do
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mangleVarBool "$var" ${role_suffixes[@]+"${role_suffixes[@]}"}
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done
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# `-B@out@/bin' forces cc to use ld-wrapper.sh when calling ld.
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NIX_CFLAGS_COMPILE_@suffixSalt@="-B@out@/bin/ $NIX_CFLAGS_COMPILE_@suffixSalt@"
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# Export and assign separately in order that a failing $(..) will fail
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# the script.
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# Currently bootstrap-tools does not split glibc, and gcc files into
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# separate directories. As a workaround we want resulting cflags to be
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# ordered as: crt1-cflags libc-cflags cc-cflags. Otherwise we mix crt/libc.so
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# from different libc as seen in
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# https://github.com/NixOS/nixpkgs/issues/158042
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#
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# Note that below has reverse ordering as we prepend flags one-by-one.
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# Once bootstrap-tools is split into different directories we can stop
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# relying on flag ordering below.
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if [ -e @out@/nix-support/cc-cflags ]; then
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NIX_CFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/cc-cflags) $NIX_CFLAGS_COMPILE_@suffixSalt@"
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fi
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if [[ "$cInclude" = 1 ]] && [ -e @out@/nix-support/libc-cflags ]; then
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NIX_CFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/libc-cflags) $NIX_CFLAGS_COMPILE_@suffixSalt@"
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fi
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if [ -e @out@/nix-support/libc-crt1-cflags ]; then
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NIX_CFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/libc-crt1-cflags) $NIX_CFLAGS_COMPILE_@suffixSalt@"
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fi
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if [ -e @out@/nix-support/libcxx-cxxflags ]; then
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NIX_CXXSTDLIB_COMPILE_@suffixSalt@+=" $(< @out@/nix-support/libcxx-cxxflags)"
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fi
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if [ -e @out@/nix-support/libcxx-ldflags ]; then
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NIX_CXXSTDLIB_LINK_@suffixSalt@+=" $(< @out@/nix-support/libcxx-ldflags)"
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fi
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if [ -e @out@/nix-support/gnat-cflags ]; then
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NIX_GNATFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/gnat-cflags) $NIX_GNATFLAGS_COMPILE_@suffixSalt@"
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fi
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if [ -e @out@/nix-support/cc-ldflags ]; then
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NIX_LDFLAGS_@suffixSalt@+=" $(< @out@/nix-support/cc-ldflags)"
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fi
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if [ -e @out@/nix-support/cc-cflags-before ]; then
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NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@="$(< @out@/nix-support/cc-cflags-before) $NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@"
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fi
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# Only add darwin min version flag if a default darwin min version is set,
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# which is a signal that we're targetting darwin.
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if [ "@darwinMinVersion@" ]; then
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mangleVarSingle @darwinMinVersionVariable@ ${role_suffixes[@]+"${role_suffixes[@]}"}
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NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@="-m@darwinPlatformForCC@-version-min=${@darwinMinVersionVariable@_@suffixSalt@:-@darwinMinVersion@} $NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@"
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fi
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# That way forked processes will not extend these environment variables again.
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export NIX_CC_WRAPPER_FLAGS_SET_@suffixSalt@=1
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