systems: add isCompatible handling

This commit is contained in:
Matthew Bauer 2019-02-21 22:17:51 -05:00
parent 266315c91d
commit f455a07f13
2 changed files with 63 additions and 2 deletions

View file

@ -24,6 +24,8 @@ rec {
config = parse.tripleFromSystem final.parsed;
# Just a guess, based on `system`
platform = platforms.selectBySystem final.system;
# Determine whether we are compatible with the provided CPU
isCompatible = platform: parse.isCompatible final.parsed.cpu platform.parsed.cpu;
# Derived meta-data
libc =
/**/ if final.isDarwin then "libSystem"
@ -98,8 +100,7 @@ rec {
wine = (pkgs.winePackagesFor wine-name).minimal;
in
if final.parsed.kernel.name == pkgs.stdenv.hostPlatform.parsed.kernel.name &&
(final.parsed.cpu.name == pkgs.stdenv.hostPlatform.parsed.cpu.name ||
(final.isi686 && pkgs.stdenv.hostPlatform.isx86_64))
pkgs.stdenv.hostPlatform.isCompatible final
then pkgs.runtimeShell
else if final.isWindows
then "${wine}/bin/${wine-name}"

View file

@ -112,6 +112,66 @@ rec {
avr = { bits = 8; family = "avr"; };
};
# Determine where two CPUs are compatible with each other. That is,
# can we run code built for system b on system a? For that to
# happen, then the set of all possible possible programs that system
# b accepts must be a subset of the set of all programs that system
# a accepts. This compatibility relation forms a category where each
# CPU is an object and each arrow from a to b represents
# compatibility. CPUs with multiple modes of Endianness are
# isomorphic while all CPUs are endomorphic because any program
# built for a CPU can run on that CPU.
isCompatible = a: b: with cpuTypes; lib.any lib.id [
# x86
(b == i386 && isCompatible a i486)
(b == i486 && isCompatible a i586)
(b == i586 && isCompatible a i686)
# NOTE: Not true in some cases. Like in WSL mode.
(b == i686 && isCompatible a x86_64)
# ARM
(b == arm && isCompatible a armv5tel)
(b == armv5tel && isCompatible a armv6m)
(b == armv6m && isCompatible a armv6l)
(b == armv6l && isCompatible a armv7a)
(b == armv7a && isCompatible a armv7r)
(b == armv7r && isCompatible a armv7m)
(b == armv7m && isCompatible a armv7l)
(b == armv7l && isCompatible a armv8a)
(b == armv8a && isCompatible a armv8r)
(b == armv8r && isCompatible a armv8m)
# NOTE: not always true! Some arm64 cpus dont support arm32 mode.
(b == armv8m && isCompatible a aarch64)
(b == aarch64 && a == aarch64_be)
(b == aarch64_be && isCompatible a aarch64)
# PowerPC
(b == powerpc && isCompatible a powerpc64)
(b == powerpcle && isCompatible a powerpc)
(b == powerpc && a == powerpcle)
(b == powerpc64le && isCompatible a powerpc64)
(b == powerpc64 && a == powerpc64le)
# MIPS
(b == mips && isCompatible a mips64)
(b == mips && a == mipsel)
(b == mipsel && isCompatible a mips)
(b == mips64 && a == mips64el)
(b == mips64el && isCompatible a mips64)
# RISCV
(b == riscv32 && isCompatible a riscv64)
# SPARC
(b == sparc && isCompatible a sparc64)
# WASM
(b == wasm32 && isCompatible a wasm64)
# identity
(b == a)
];
################################################################################
types.openVendor = mkOptionType {