Maximilian Bosch
8bc5104a6e
When specifying the `builder` attribute in `stdenv.mkDerivation`, this
will be effectively transformed into
builtins.derivation {
builder = stdenv.shell;
args = [ "-e" builder ];
}
This also means that `default-builder.sh` is never sourced and as a
result it's not guaranteed that `$NIX_ATTRS_SH_FILE` is set to a correct
location[1].
Also, we need to source `.attrs.sh` to source `$stdenv`. So, the
following is done now:
* If `$NIX_ATTRS_SH_FILE` points to a correct location, then use it.
Directly using `.attrs.sh` is problematic for `nix-shell(1)` usage
(see previous commit for more context), so prefer the environment
variable if possible.
* Otherwise, if `.attrs.sh` exists, then use it. See [1] for when this
can happen.
* If neither applies, it can be assumed that `__structuredAttrs` is
turned off and thus nothing needs to be done.
[1] It's possible that it doesn't exist at all - in case of Nix 2.3 or
it can point to a wrong location on older Nix versions with a bug in
`__structuredAttrs`.
44 lines
772 B
Bash
44 lines
772 B
Bash
if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; elif [ -f .attrs.sh ]; then . .attrs.sh; fi
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set -x
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export NIX_DEBUG=1
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source $stdenv/setup
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export NIX_ENFORCE_PURITY=1
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mkdir $out
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mkdir $out/bin
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cat > hello.c <<EOF
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#include <stdio.h>
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int main(int argc, char * * argv)
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{
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printf("Hello World!\n");
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return 0;
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}
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EOF
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#gcc -I/nix/store/foo -I /nix/store/foo -I/usr/lib -I /usr/lib hello.c -o $out/bin/hello
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gcc -I`pwd` -L /nix/store/abcd/lib -isystem /usr/lib hello.c -o $out/bin/hello
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$out/bin/hello
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cat > hello2.cc <<EOF
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#include <iostream>
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int main(int argc, char * * argv)
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{
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std::cout << "Hello World!\n";
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std::cout << VALUE << std::endl;
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return 0;
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}
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EOF
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g++ hello2.cc -o $out/bin/hello2 -DVALUE="1 + 2 * 3"
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$out/bin/hello2
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ld -v
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