From 3b32c920d569c1653d2a3ee84b0aa1f24bf34a85 Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Sun, 2 Dec 2018 17:47:53 -0600
Subject: systems/parse.nix: support eabihf
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eabihf is an abi that can be used with ARM architectures that support
the “hard float”. It should probably only be used with ARM32 when you
are absolutely sure your binaries will run on ARM systems with a FPU.

Also, add an example "armhf-embedded" to match the preexisting
arm-embedded system. qmk_firmware needs hard float in a few places, so
add them here to get that to work.

Fixes #51184
---
 lib/systems/parse.nix | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

(limited to 'lib/systems/parse.nix')

diff --git a/lib/systems/parse.nix b/lib/systems/parse.nix
index 73b065689d0..7db09fc550e 100644
--- a/lib/systems/parse.nix
+++ b/lib/systems/parse.nix
@@ -209,8 +209,15 @@ rec {
   abis = setTypes types.openAbi {
     cygnus       = {};
     msvc         = {};
-    eabi         = {};
-    elf         = {};
+
+    # Note: eabi is specific to ARM and PowerPC.
+    # On PowerPC, this corresponds to PPCEABI.
+    # On ARM, this corresponds to ARMEABI.
+    eabi         = { float = "soft"; };
+    eabihf       = { float = "hard"; };
+
+    # Other architectures should use ELF in embedded situations.
+    elf          = {};
 
     androideabi  = {};
     android      = {
@@ -272,10 +279,8 @@ rec {
     "2" = # We only do 2-part hacks for things Nix already supports
       if elemAt l 1 == "cygwin"
         then { cpu = elemAt l 0;                      kernel = "windows";  abi = "cygnus";   }
-      else if (elemAt l 1 == "eabi")
-        then { cpu = elemAt l 0; vendor = "none"; kernel = "none"; abi = elemAt l 1; }
-      else if (elemAt l 1 == "elf")
-        then { cpu = elemAt l 0; vendor = "none"; kernel = "none"; abi = elemAt l 1; }
+      else if (elemAt l 1) == "elf"
+      then { cpu = elemAt l 0; vendor = "unknown";    kernel = "none";     abi = elemAt l 1; }
       else   { cpu = elemAt l 0;                      kernel = elemAt l 1;                   };
     "3" = # Awkwards hacks, beware!
       if elemAt l 1 == "apple"
@@ -286,10 +291,8 @@ rec {
         then { cpu = elemAt l 0; vendor = elemAt l 1; kernel = "windows";  abi = "gnu"; }
       else if hasPrefix "netbsd" (elemAt l 2)
         then { cpu = elemAt l 0; vendor = elemAt l 1;    kernel = elemAt l 2;                }
-      else if (elemAt l 2 == "eabi")
-        then { cpu = elemAt l 0; vendor = elemAt l 1; kernel = "none"; abi = elemAt l 2; }
-      else if (elemAt l 2 == "elf")
-        then { cpu = elemAt l 0; vendor = elemAt l 1; kernel = "none"; abi = elemAt l 2; }
+      else if (elem (elemAt l 2) ["eabi" "eabihf" "elf"])
+        then { cpu = elemAt l 0; vendor = "unknown"; kernel = elemAt l 1; abi = elemAt l 2; }
       else throw "Target specification with 3 components is ambiguous";
     "4" =    { cpu = elemAt l 0; vendor = elemAt l 1; kernel = elemAt l 2; abi = elemAt l 3; };
   }.${toString (length l)}
-- 
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