[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

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"];
 }

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";

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; }; };

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"; };

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;
 }

pkgs/build-support/bintools-wrapper/default.nix

@@ -171,7 +171,7 @@ stdenv.mkDerivation {
       else if targetPlatform.isWindows then "pe"
       else "elf" + toString targetPlatform.parsed.cpu.bits;
     endianPrefix = if targetPlatform.isBigEndian then "big" else "little";
-    sep = optionalString (!targetPlatform.isMips) "-";
+    sep = optionalString (!targetPlatform.isMips && !targetPlatform.isPower) "-";
     arch =
       /**/ if targetPlatform.isAarch64 then endianPrefix + "aarch64"
       else if targetPlatform.isAarch32     then endianPrefix + "arm"
@@ -183,7 +183,7 @@ stdenv.mkDerivation {
           "mips64"   = "btsmip";
           "mips64el" = "ltsmip";
         }.${targetPlatform.parsed.cpu.name}
-      else if targetPlatform.isPowerPC then "powerpc"
+      else if targetPlatform.isPower then if targetPlatform.isBigEndian then "ppc" else "lppc"
       else if targetPlatform.isSparc then "sparc"
       else throw "unknown emulation for platform: " + targetPlatform.config;
     in targetPlatform.platform.bfdEmulation or (fmt + sep + arch);

pkgs/development/compilers/gcc/7/default.nix

@@ -54,7 +54,8 @@ let version = "7.3.0";
         url = "https://git.busybox.net/buildroot/plain/package/gcc/7.1.0/0900-remove-selftests.patch?id=11271540bfe6adafbc133caf6b5b902a816f5f02";
         sha256 = "0mrvxsdwip2p3l17dscpc1x8vhdsciqw1z5q9i6p5g9yg1cqnmgs";
       })
-      ++ optional langFortran ../gfortran-driving.patch;
+      ++ optional langFortran ../gfortran-driving.patch
+      ++ optional (targetPlatform.libc == "musl" && targetPlatform.isPower) ../ppc-musl.patch;
 
     /* Cross-gcc settings (build == host != target) */
     crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";

pkgs/development/compilers/gcc/8/default.nix

@@ -49,7 +49,8 @@ let version = "8.2.0";
         url = "https://git.busybox.net/buildroot/plain/package/gcc/${version}/0900-remove-selftests.patch?id=11271540bfe6adafbc133caf6b5b902a816f5f02";
         sha256 = ""; # TODO: uncomment and check hash when available.
       }) */
-      ++ optional langFortran ../gfortran-driving.patch;
+      ++ optional langFortran ../gfortran-driving.patch
+      ++ optional (targetPlatform.libc == "musl" && targetPlatform.isPower) ../ppc-musl.patch;
 
     /* Cross-gcc settings (build == host != target) */
     crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";

pkgs/development/compilers/gcc/common/platform-flags.nix

@@ -10,4 +10,7 @@ in lib.concatLists [
   (lib.optional (p ? fpu) "--with-fpu=${p.fpu}")
   (lib.optional (p ? float) "--with-float=${p.float}")
   (lib.optional (p ? mode) "--with-mode=${p.mode}")
+  (lib.optional
+    (let tp = targetPlatform; in tp.isPower && tp.libc == "glibc" && tp.is64bit && tp.isLittleEndian)
+    "--with-long-double-128")
 ]

pkgs/development/compilers/gcc/ppc-musl.patch

@@ -0,0 +1,18 @@
+diff --git a/gcc/config/rs6000/sysv4.h b/gcc/config/rs6000/sysv4.h
+index cbee89140dd..e1f26b0a096 100644
+--- a/gcc/config/rs6000/sysv4.h
++++ b/gcc/config/rs6000/sysv4.h
+@@ -996,13 +996,7 @@ ncrtn.o%s"
+     { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1,	\
+       GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
+ 
+-#ifdef LOCAL_INCLUDE_DIR
+-#define INCLUDE_DEFAULTS_MUSL_LOCAL			\
+-    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },		\
+-    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
+-#else
+ #define INCLUDE_DEFAULTS_MUSL_LOCAL
+-#endif
+ 
+ #ifdef PREFIX_INCLUDE_DIR
+ #define INCLUDE_DEFAULTS_MUSL_PREFIX			\

pkgs/os-specific/linux/kernel/manual-config.nix

@@ -98,6 +98,7 @@ let
             sed -i "$mf" -e 's|/usr/bin/||g ; s|/bin/||g ; s|/sbin/||g'
         done
         sed -i Makefile -e 's|= depmod|= ${buildPackages.kmod}/bin/depmod|'
+        sed -i scripts/ld-version.sh -e "s|/usr/bin/awk|${buildPackages.gawk}/bin/awk|"
       '';
 
       configurePhase = ''
@@ -145,9 +146,12 @@ let
       ++ optional installsFirmware "INSTALL_FW_PATH=$(out)/lib/firmware";
 
       # Some image types need special install targets (e.g. uImage is installed with make uinstall)
-      installTargets = [ (if platform.kernelTarget == "uImage" then "uinstall" else
+      installTargets = [ (
-                          if platform.kernelTarget == "zImage" || platform.kernelTarget == "Image.gz" then "zinstall" else
+        if platform ? kernelInstallTarget then platform.kernelInstallTarget
-                          "install") ];
+        else if platform.kernelTarget == "uImage" then "uinstall"
+        else if platform.kernelTarget == "zImage" || platform.kernelTarget == "Image.gz" then "zinstall"
+        else "install"
+      ) ];
 
       postInstall = (optionalString installsFirmware ''
         mkdir -p $out/lib/firmware

pkgs/os-specific/linux/musl/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl
+{ stdenv, lib, fetchurl, hostPlatform
 , linuxHeaders ? null
 , useBSDCompatHeaders ? true
 }:
@@ -61,11 +61,12 @@ stdenv.mkDerivation rec {
     configureFlagsArray+=("--syslibdir=$out/lib")
   '';
 
+  CFLAGS="-fstack-protector-strong" + lib.optionalString hostPlatform.isPower " -mlong-double-64";
+
   configureFlags = [
     "--enable-shared"
     "--enable-static"
     "--enable-debug"
-    "CFLAGS=-fstack-protector-strong"
     "--enable-wrapper=all"
   ];
 

pkgs/stdenv/default.nix

@@ -47,6 +47,7 @@ in
     "aarch64-linux" = stagesLinux;
     "mipsel-linux" = stagesLinux;
     "powerpc-linux" = /* stagesLinux */ stagesNative;
+    "powerpc64le-linux" = stagesLinux;
     "x86_64-darwin" = stagesDarwin;
     "x86_64-solaris" = stagesNix;
     "i686-cygwin" = stagesNative;

pkgs/stdenv/linux/bootstrap-tools/scripts/unpack-bootstrap-tools.sh

@@ -9,6 +9,9 @@ echo Patching the bootstrap tools...
 if test -f $out/lib/ld.so.?; then
    # MIPS case
    LD_BINARY=$out/lib/ld.so.?
+elif test -f $out/lib/ld64.so.?; then
+   # ppc64(le)
+   LD_BINARY=$out/lib/ld64.so.?
 else
    # i686, x86_64 and armv5tel
    LD_BINARY=$out/lib/ld-*so.?

pkgs/stdenv/linux/default.nix

@@ -16,11 +16,13 @@
       "armv7l-linux" = import ./bootstrap-files/armv7l.nix;
       "aarch64-linux" = import ./bootstrap-files/aarch64.nix;
       "mipsel-linux" = import ./bootstrap-files/loongson2f.nix;
+      "powerpc64le-linux" = import ./bootstrap-files/ppc64le.nix;
     };
     "musl" = {
       "aarch64-linux" = import ./bootstrap-files/aarch64-musl.nix;
       "armv6l-linux"  = import ./bootstrap-files/armv6l-musl.nix;
       "x86_64-linux"  = import ./bootstrap-files/x86_64-musl.nix;
+      "powerpc64le-linux" = import ./bootstrap-files/ppc64le-musl.nix;
     };
   };
   archLookupTable = table.${localSystem.libc}

pkgs/stdenv/linux/make-bootstrap-tools-cross.nix

@@ -5,16 +5,18 @@ let
     localSystem = { inherit system; };
     inherit crossSystem;
   };
-
+  lib = import ../../../lib;
-in with (import ../../../lib).systems.examples; {
+in lib.mapAttrs (n: make) (with lib.systems.examples; {
-  armv5tel   = make sheevaplug;
+  armv5tel   = sheevaplug;
-  scaleway   = make scaleway-c1;
+  scaleway   = scaleway-c1;
-  pogoplug4  = make pogoplug4;
+  pogoplug4  = pogoplug4;
-  armv6l     = make raspberryPi;
+  armv6l     = raspberryPi;
-  armv7l     = make armv7l-hf-multiplatform;
+  armv7l     = armv7l-hf-multiplatform;
-  aarch64    = make aarch64-multiplatform;
+  aarch64    = aarch64-multiplatform;
-  x86_64-musl  = make musl64;
+  x86_64-musl  = musl64;
-  armv6l-musl  = make muslpi;
+  armv6l-musl  = muslpi;
-  aarch64-musl = make aarch64-multiplatform-musl;
+  aarch64-musl = aarch64-multiplatform-musl;
-  riscv64 = make riscv64;
+  riscv64 = riscv64;
-}
+  powerpc64le = powernv;
+  powerpc64le-musl = musl-power;
+})