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daemon: Always try to execute the builder regardless of the platform.

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* nix/libstore/build.cc (runChild): Move platform check after 'execve'
call.  Check specifically for ENOEXEC.
This commit is contained in:
Ludovic Courtès 2018-01-09 17:04:02 +01:00
parent 50dc3b8b2f
commit 7bf2a70a4f
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GPG Key ID: 090B11993D9AEBB5
1 changed files with 14 additions and 9 deletions
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23
nix/libstore/build.cc
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@ -1682,15 +1682,6 @@ void DerivationGoal::startBuilder()
f.exceptions(boost::io::all_error_bits ^ boost::io::too_many_args_bit);
startNest(nest, lvlInfo, f % showPaths(missingPaths) % curRound % nrRounds);
/* Right platform? */
if (!canBuildLocally(drv.platform)) {
if (settings.printBuildTrace)
printMsg(lvlError, format("@ unsupported-platform %1% %2%") % drvPath % drv.platform);
throw Error(
format("a `%1%' is required to build `%3%', but I am a `%2%'")
% drv.platform % settings.thisSystem % drvPath);
}
/* Note: built-in builders are *not* running in a chroot environment so
that we can easily implement them in Guile without having it as a
derivation input (they are running under a separate build user,
@ -2311,6 +2302,20 @@ void DerivationGoal::runChild()
execve(drv.builder.c_str(), stringsToCharPtrs(args).data(), stringsToCharPtrs(envStrs).data());
int error = errno;
/* Right platform? Check this after we've tried 'execve' to allow for
transparent emulation of different platforms with binfmt_misc
handlers that invoke QEMU. */
if (error == ENOEXEC && !canBuildLocally(drv.platform)) {
if (settings.printBuildTrace)
printMsg(lvlError, format("@ unsupported-platform %1% %2%") % drvPath % drv.platform);
throw Error(
format("a `%1%' is required to build `%3%', but I am a `%2%'")
% drv.platform % settings.thisSystem % drvPath);
}
errno = error;
throw SysError(format("executing `%1%'") % drv.builder);
} catch (std::exception & e) {