Hi, I believe there is an issue with 'lower-gexp'. Running the following snippet to lower a G-Expression for "i686-linux" yields output that references store paths built for x86_64. In this case, the Guile interpreter used is an x86_64 binary.
#+BEGIN_SRC scheme
(define (display-exp exp)
(mlet* %store-monad ((lowered (lower-gexp exp
#:system "i686-linux"
#:target "i686-linux"))
(to-build -> (cons (lowered-gexp-guile lowered)
(lowered-gexp-inputs lowered)))
(_ (built-derivations to-build)))
(return (format #t "~a~%" (lowered-gexp-sexp lowered)))))
(with-store store
(run-with-store store
(display-exp #~(primitive-load #$(switch-system-program %system)))))
#+END_SRC
jakob@Epsilon ~ $ guile ~/test.scm (primitive-load /gnu/store/v7v1b7375j9j82dvfycv56v36nv5jq3y-switch-to-system.scm) jakob@Epsilon ~ $ cat /gnu/store/v7v1b7375j9j82dvfycv56v36nv5jq3y-switch-to-system.scm #!/gnu/store/9alic3caqhay3h8mx4iihpmyj6ymqpcx-guile-2.2.4/bin/guile --no-auto-compile !# ... jakob@Epsilon ~ $ file /gnu/store/9alic3caqhay3h8mx4iihpmyj6ymqpcx-guile-2.2.4/bin/guile /gnu/store/9alic3caqhay3h8mx4iihpmyj6ymqpcx-guile-2.2.4/bin/guile: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /gnu/store/h90vnqw0nwd0hhm1l5dgxsdrigddfmq4-glibc-2.28/lib/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, not stripped
This doesn't seem to be an issue if '%current-system' is parameterized,
as in the following.
#+BEGIN_SRC scheme
(parameterize ((%current-system "i686-linux"))
(with-store store
(run-with-store store
(display-exp #~(primitive-load #$(switch-system-program %system))))))
#+END_SRC
Regards,
Jakob
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