guix: gnu-build-system: Handle missing libc.
* guix/build-system/gnu.scm (standard-cross-packages): Handle the case when `cross-libc` returns #f. Change-Id: I85ee5456f10ff141d521a5f2d91267cd612c5616 Signed-off-by: Efraim Flashner <efraim@flashner.co.il>
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@ -460,10 +460,13 @@ is one of `host' or `target'."
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`(("cross-gcc" ,(gcc target
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#:xbinutils (binutils target)
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#:libc libc))
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("cross-libc" ,libc)
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;; Some targets don't have a libc. (e.g. *-elf targets).
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,@(if libc
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`(("cross-libc" ,libc))
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'())
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;; MinGW's libc doesn't have a "static" output.
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,@(if (member "static" (package-outputs libc))
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,@(if (and libc (member "static" (package-outputs libc)))
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`(("cross-libc:static" ,libc "static"))
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'()))))))))
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