Merge branch 'aarch64-armv7' of git://github.com/lheckemann/nix

Support extra compatible architectures (#1916)
This commit is contained in:
Shea Levy 2018-04-23 08:48:22 -04:00
commit 8e6108ff71
No known key found for this signature in database
GPG key ID: 5C0BD6957D86FE27
5 changed files with 35 additions and 11 deletions

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@ -254,6 +254,25 @@ false</literal>.</para>
</varlistentry>
<varlistentry xml:id="conf-extra-platforms"><term><literal>extra-platforms</literal></term>
<listitem><para>Platforms other than the native one which
this machine is capable of building for. This can be useful for
supporting additional architectures on compatible machines:
i686-linux can be built on x86_64-linux machines (and the default
for this setting reflects this); armv7 is backwards-compatible with
armv6 and armv5tel; some aarch64 machines can also natively run
32-bit ARM code; and qemu-user may be used to support non-native
platforms (though this may be slow and buggy). Most values for this
are not enabled by default because build systems will often
misdetect the target platform and generate incompatible code, so you
may wish to cross-check the results of using this option against
proper natively-built versions of your
derivations.</para></listitem>
</varlistentry>
<varlistentry xml:id="conf-extra-substituters"><term><literal>extra-substituters</literal></term>
<listitem><para>Additional binary caches appended to those

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@ -98,7 +98,9 @@ int main (int argc, char * * argv)
source >> drvPath;
auto requiredFeatures = readStrings<std::set<std::string>>(source);
auto canBuildLocally = amWilling && (neededSystem == settings.thisSystem);
auto canBuildLocally = amWilling
&& ( neededSystem == settings.thisSystem
|| settings.extraPlatforms.get().count(neededSystem) > 0);
/* Error ignored here, will be caught later */
mkdir(currentLoad.c_str(), 0777);

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@ -2499,6 +2499,10 @@ void setupSeccomp()
seccomp_arch_add(ctx, SCMP_ARCH_X32) != 0)
throw SysError("unable to add X32 seccomp architecture");
if (settings.thisSystem == "aarch64-linux" &&
seccomp_arch_add(ctx, SCMP_ARCH_ARM) != 0)
printError("unsable to add ARM seccomp architecture; this may result in spurious build failures if running 32-bit ARM processes.");
/* Prevent builders from creating setuid/setgid binaries. */
for (int perm : { S_ISUID, S_ISGID }) {
if (seccomp_rule_add(ctx, SCMP_ACT_ERRNO(EPERM), SCMP_SYS(chmod), 1,

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@ -57,16 +57,8 @@ bool BasicDerivation::isBuiltin() const
bool BasicDerivation::canBuildLocally() const
{
return platform == settings.thisSystem
|| isBuiltin()
#if __linux__
|| (platform == "i686-linux" && settings.thisSystem == "x86_64-linux")
|| (platform == "armv6l-linux" && settings.thisSystem == "armv7l-linux")
|| (platform == "armv5tel-linux" && (settings.thisSystem == "armv7l-linux" || settings.thisSystem == "armv6l-linux"))
#elif __FreeBSD__
|| (platform == "i686-linux" && settings.thisSystem == "x86_64-freebsd")
|| (platform == "i686-linux" && settings.thisSystem == "i686-freebsd")
#endif
;
|| settings.extraPlatforms.get().count(platform) > 0
|| isBuiltin();
}

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@ -295,6 +295,13 @@ public:
"Nix store has a valid signature (that is, one signed using a key "
"listed in 'trusted-public-keys'."};
Setting<StringSet> extraPlatforms{this,
SYSTEM == "x86_64-linux" ? StringSet{"i686-linux"} : StringSet{},
"extra-platforms",
"Additional platforms that can be built on the local system. "
"These may be supported natively (e.g. armv7 on some aarch64 CPUs "
"or using hacks like qemu-user."};
Setting<Strings> substituters{this,
nixStore == "/nix/store" ? Strings{"https://cache.nixos.org/"} : Strings(),
"substituters",