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https://github.com/NixOS/nixpkgs.git
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0884027ef5
This reverts commit 6c064e6b1f, reapplying
PR #28029 which was supposed to have gone to staging all along.
58 lines
2 KiB
Bash
58 lines
2 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_LINK
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NIX+CXXSTDLIB_COMPILE
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NIX+CXXSTDLIB_LINK
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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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# Accumulate infixes for taking in the right input parameters. See setup-hook
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# for details.
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declare -a role_infixes=()
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if [ "${NIX_CC_WRAPPER_@infixSalt@_TARGET_BUILD:-}" ]; then
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role_infixes+=(_BUILD_)
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fi
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if [ "${NIX_CC_WRAPPER_@infixSalt@_TARGET_HOST:-}" ]; then
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role_infixes+=(_)
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fi
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if [ "${NIX_CC_WRAPPER_@infixSalt@_TARGET_TARGET:-}" ]; then
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role_infixes+=(_TARGET_)
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fi
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# We need to mangle names for hygiene, but also take parameters/overrides
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# from the environment.
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for var in "${var_templates_list[@]}"; do
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mangleVarList "$var" ${role_infixes[@]+"${role_infixes[@]}"}
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done
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for var in "${var_templates_bool[@]}"; do
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mangleVarBool "$var" ${role_infixes[@]+"${role_infixes[@]}"}
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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_@infixSalt@_CFLAGS_COMPILE="-B@out@/bin/ $NIX_@infixSalt@_CFLAGS_COMPILE"
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# Export and assign separately in order that a failing $(..) will fail
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# the script.
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if [ -e @out@/nix-support/libc-cflags ]; then
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NIX_@infixSalt@_CFLAGS_COMPILE="$(< @out@/nix-support/libc-cflags) $NIX_@infixSalt@_CFLAGS_COMPILE"
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fi
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if [ -e @out@/nix-support/cc-cflags ]; then
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NIX_@infixSalt@_CFLAGS_COMPILE="$(< @out@/nix-support/cc-cflags) $NIX_@infixSalt@_CFLAGS_COMPILE"
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fi
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if [ -e @out@/nix-support/cc-ldflags ]; then
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NIX_@infixSalt@_LDFLAGS+=" $(< @out@/nix-support/cc-ldflags)"
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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_@infixSalt@_FLAGS_SET=1
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