mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-30 02:42:59 +00:00
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
|
|
set -x
|
|
|
|
export NIX_DEBUG=1
|
|
|
|
source $stdenv/setup
|
|
|
|
export NIX_ENFORCE_PURITY=1
|
|
|
|
mkdir $out
|
|
mkdir $out/bin
|
|
|
|
cat > hello.c <<EOF
|
|
#include <stdio.h>
|
|
|
|
int main(int argc, char * * argv)
|
|
{
|
|
printf("Hello World!\n");
|
|
return 0;
|
|
}
|
|
EOF
|
|
|
|
#gcc -I/nix/store/foo -I /nix/store/foo -I/usr/lib -I /usr/lib hello.c -o $out/bin/hello
|
|
gcc -I`pwd` -L /nix/store/abcd/lib -isystem /usr/lib hello.c -o $out/bin/hello
|
|
|
|
$out/bin/hello
|
|
|
|
cat > hello2.cc <<EOF
|
|
#include <iostream>
|
|
|
|
int main(int argc, char * * argv)
|
|
{
|
|
std::cout << "Hello World!\n";
|
|
std::cout << VALUE << std::endl;
|
|
return 0;
|
|
}
|
|
EOF
|
|
|
|
g++ hello2.cc -o $out/bin/hello2 -DVALUE="1 + 2 * 3"
|
|
|
|
$out/bin/hello2
|
|
|
|
ld -v
|