[RFC] ppc64le enablement (#45340)

* ppc64le enablement

* gcc, glibc: properly handle __float128

* lib/systems, stdenv: syntax cleanup

* gcc7: remove ugly hack

* gcc: add/update __float128 flags

* stdenv: add another pair of quotes for consistency

* gcc: move __float128 flag for ppc64le-glibc into common/platform-flags.nix

5 files changed, 29 insertions, 1 deletions

diff --git a/lib/systems/doubles.nix b/lib/systems/doubles.nix
index c6618083ce72..adc454406b85 100644
--- a/lib/systems/doubles.nix
+++ b/lib/systems/doubles.nix
@@ -44,5 +44,5 @@ in rec {
   openbsd = filterDoubles predicates.isOpenBSD;
   unix    = filterDoubles predicates.isUnix;
 
-  mesaPlatforms = ["i686-linux" "x86_64-linux" "x86_64-darwin" "armv5tel-linux" "armv6l-linux" "armv7l-linux" "aarch64-linux"];
+  mesaPlatforms = ["i686-linux" "x86_64-linux" "x86_64-darwin" "armv5tel-linux" "armv6l-linux" "armv7l-linux" "aarch64-linux" "powerpc64le-linux"];
 }
diff --git a/lib/systems/examples.nix b/lib/systems/examples.nix
index 31772ba0054d..3828b2f84c64 100644
--- a/lib/systems/examples.nix
+++ b/lib/systems/examples.nix
@@ -8,6 +8,14 @@ rec {
   #
   # Linux
   #
+  powernv = {
+    config = "powerpc64le-unknown-linux-gnu";
+    platform = platforms.powernv;
+  };
+  musl-power = {
+    config = "powerpc64le-unknown-linux-musl";
+    platform = platforms.powernv;
+  };
 
   sheevaplug = rec {
     config = "armv5tel-unknown-linux-gnueabi";
diff --git a/lib/systems/inspect.nix b/lib/systems/inspect.nix
index 0c70f2a7cd5f..ac34ed45695c 100644
--- a/lib/systems/inspect.nix
+++ b/lib/systems/inspect.nix
@@ -11,6 +11,7 @@ rec {
     isi686         = { cpu = cpuTypes.i686; };
     isx86_64       = { cpu = cpuTypes.x86_64; };
     isPowerPC      = { cpu = cpuTypes.powerpc; };
+    isPower = { cpu = { family = "power"; }; };
     isx86          = { cpu = { family = "x86"; }; };
     isAarch32      = { cpu = { family = "arm"; bits = 32; }; };
     isAarch64      = { cpu = { family = "arm"; bits = 64; }; };
diff --git a/lib/systems/parse.nix b/lib/systems/parse.nix
index b07396a9dfd7..7ee3479c333d 100644
--- a/lib/systems/parse.nix
+++ b/lib/systems/parse.nix
@@ -90,6 +90,8 @@ rec {
     mips64el = { bits = 64; significantByte = littleEndian; family = "mips"; };
 
     powerpc  = { bits = 32; significantByte = bigEndian;    family = "power"; };
+    powerpc64 = { bits = 64; significantByte = bigEndian; family = "power"; };
+    powerpc64le = { bits = 64; significantByte = littleEndian; family = "power"; };
 
     riscv32  = { bits = 32; significantByte = littleEndian; family = "riscv"; };
     riscv64  = { bits = 64; significantByte = littleEndian; family = "riscv"; };
diff --git a/lib/systems/platforms.nix b/lib/systems/platforms.nix
index 8027f6b9fc1b..56783d99e3d4 100644
--- a/lib/systems/platforms.nix
+++ b/lib/systems/platforms.nix
@@ -20,6 +20,22 @@ rec {
     kernelAutoModules = false;
   };
 
+  powernv = {
+    name = "PowerNV";
+    kernelArch = "powerpc";
+    kernelBaseConfig = "powernv_defconfig";
+    kernelTarget = "zImage";
+    kernelInstallTarget = "install";
+    kernelFile = "vmlinux";
+    kernelAutoModules = true;
+    # avoid driver/FS trouble arising from unusual page size
+    kernelExtraConfig = ''
+      PPC_64K_PAGES n
+      PPC_4K_PAGES y
+      IPV6 y
+    '';
+  };
+
   ##
   ## ARM
   ##
@@ -458,5 +474,6 @@ rec {
       "armv7l-linux" = armv7l-hf-multiplatform;
       "aarch64-linux" = aarch64-multiplatform;
       "mipsel-linux" = fuloong2f_n32;
+      "powerpc64le-linux" = powernv;
     }.${system} or pcBase;
 }