cc-wrapper: make machine configuration configurable

It is useful to make these dynamic and not bake them into gcc. This
means we don’t have to rebuild gcc to change these values. Instead, we
will pass cflags to gcc based on platform values. This was already
done hackily for android gcc (which is multi-target), but not for our
own gccs which are single target.

To accomplish this, we need to add a few things:

- add ‘arch’ to cpu
- add NIX_CFLAGS_COMPILE_BEFORE flag (goes before args)
- set -march everywhere
- set mcpu, mfpu, mmode, and mtune based on targetPlatform.gcc flags

cc-wrapper: only set -march when it is in the cpu type

Some architectures don’t have a good mapping of -march. For instance
POWER architecture doesn’t support the -march flag at all!

https://gcc.gnu.org/onlinedocs/gcc/RS_002f6000-and-PowerPC-Options.html#RS_002f6000-and-PowerPC-Options

1 files changed, 18 insertions, 18 deletions

diff --git a/lib/systems/parse.nix b/lib/systems/parse.nix
index 3e23a721f0d9..cd0a11c058e6 100644
--- a/lib/systems/parse.nix
+++ b/lib/systems/parse.nix
@@ -69,24 +69,24 @@ rec {
 
   cpuTypes = with significantBytes; setTypes types.openCpuType {
     arm      = { bits = 32; significantByte = littleEndian; family = "arm"; };
-    armv5tel = { bits = 32; significantByte = littleEndian; family = "arm"; version = "5"; };
-    armv6m   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "6"; };
-    armv6l   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "6"; };
-    armv7a   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "7"; };
-    armv7r   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "7"; };
-    armv7m   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "7"; };
-    armv7l   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "7"; };
-    armv8a   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "8"; };
-    armv8r   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "8"; };
-    armv8m   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "8"; };
-    aarch64  = { bits = 64; significantByte = littleEndian; family = "arm"; version = "8"; };
-    aarch64_be = { bits = 64; significantByte = bigEndian; family = "arm"; version = "8"; };
-
-    i386     = { bits = 32; significantByte = littleEndian; family = "x86"; };
-    i486     = { bits = 32; significantByte = littleEndian; family = "x86"; };
-    i586     = { bits = 32; significantByte = littleEndian; family = "x86"; };
-    i686     = { bits = 32; significantByte = littleEndian; family = "x86"; };
-    x86_64   = { bits = 64; significantByte = littleEndian; family = "x86"; };
+    armv5tel = { bits = 32; significantByte = littleEndian; family = "arm"; version = "5"; arch = "armv5t"; };
+    armv6m   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "6"; arch = "armv6-m"; };
+    armv6l   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "6"; arch = "armv6"; };
+    armv7a   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "7"; arch = "armv7-a"; };
+    armv7r   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "7"; arch = "armv7-r"; };
+    armv7m   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "7"; arch = "armv7-m"; };
+    armv7l   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "7"; arch = "armv7"; };
+    armv8a   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "8"; arch = "armv8-a"; };
+    armv8r   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "8"; arch = "armv8-a"; };
+    armv8m   = { bits = 32; significantByte = littleEndian; family = "arm"; version = "8"; arch = "armv8-m"; };
+    aarch64  = { bits = 64; significantByte = littleEndian; family = "arm"; version = "8"; arch = "armv8-a"; };
+    aarch64_be = { bits = 64; significantByte = bigEndian; family = "arm"; version = "8";  arch = "armv8-a"; };
+
+    i386     = { bits = 32; significantByte = littleEndian; family = "x86"; arch = "i386"; };
+    i486     = { bits = 32; significantByte = littleEndian; family = "x86"; arch = "i486"; };
+    i586     = { bits = 32; significantByte = littleEndian; family = "x86"; arch = "i586"; };
+    i686     = { bits = 32; significantByte = littleEndian; family = "x86"; arch = "i686"; };
+    x86_64   = { bits = 64; significantByte = littleEndian; family = "x86"; arch = "x86-64"; };
 
     mips     = { bits = 32; significantByte = bigEndian;    family = "mips"; };
     mipsel   = { bits = 32; significantByte = littleEndian; family = "mips"; };