uclibc-ng: improve detection of FPU, endianess and ABI (#458935)

lib/systems/inspect.nix

@@ -440,6 +440,11 @@ rec {
     isPE = {
       kernel.execFormat = execFormats.pe;
     };
+
+    isEabi = {
+      abi.eabi = true;
+    };
+
   };
 
   # given two patterns, return a pattern which is their logical AND.

lib/systems/parse.nix

@@ -662,15 +662,19 @@ rec {
     # On ARM, this corresponds to ARMEABI.
     eabi = {
       float = "soft";
+      eabi = true;
     };
     eabihf = {
       float = "hard";
+      eabi = true;
     };
 
     # Other architectures should use ELF in embedded situations.
     elf = { };
 
-    androideabi = { };
+    androideabi = {
+      eabi = true;
+    };
     android = {
       assertions = [
         {
@@ -684,9 +688,11 @@ rec {
 
     gnueabi = {
       float = "soft";
+      eabi = true;
     };
     gnueabihf = {
       float = "hard";
+      eabi = true;
     };
     gnu = {
       assertions = [
@@ -730,17 +736,21 @@ rec {
 
     musleabi = {
       float = "soft";
+      eabi = true;
     };
     musleabihf = {
       float = "hard";
+      eabi = true;
     };
     musl = { };
 
     uclibceabi = {
       float = "soft";
+      eabi = true;
     };
     uclibceabihf = {
       float = "hard";
+      eabi = true;
     };
     uclibc = { };
 

maintainers/maintainer-list.nix

@@ -1120,6 +1120,13 @@
     githubId = 82811;
     name = "Aldo Borrero";
   };
+  aleclearmind = {
+    email = "ale.nix@clearmind.me";
+    matrix = "@bake.monorail:matrix.org";
+    github = "aleclearmind";
+    githubId = 2545644;
+    name = "Alessandro Di Federico";
+  };
   alejandrosame = {
     email = "alejandrosanchzmedina@gmail.com";
     matrix = "@alejandrosame:matrix.org";

pkgs/by-name/uc/uclibc-ng/package.nix

@@ -26,16 +26,15 @@ let
             echo "parseconfig: removing $NAME"
             sed -i /^$NAME=/d .config
 
-            #if test "$OPTION" != n; then
-                echo "parseconfig: setting $NAME=$OPTION"
-                echo "$NAME=$OPTION" >> .config
-            #fi
+            echo "parseconfig: setting $NAME=$OPTION"
+            echo "$NAME=$OPTION" >> .config
         done
         set +x
     }
   '';
 
   # UCLIBC_SUSV4_LEGACY defines 'tmpnam', needed for gcc libstdc++ builds.
+  # 'ftw' needed to build acl, a coreutils dependency
   nixConfig = ''
     RUNTIME_PREFIX "/"
     DEVEL_PREFIX "/"
@@ -52,13 +51,20 @@ let
   + lib.optionalString (stdenv.hostPlatform.gcc.float or "" == "soft") ''
     UCLIBC_HAS_FPU n
   ''
-  + lib.optionalString (stdenv.hostPlatform.isAarch32 && isCross) ''
+  + lib.optionalString stdenv.hostPlatform.isEabi ''
     CONFIG_ARM_EABI y
+  ''
+  + lib.optionalString stdenv.hostPlatform.isLittleEndian ''
     ARCH_WANTS_BIG_ENDIAN n
     ARCH_BIG_ENDIAN n
     ARCH_WANTS_LITTLE_ENDIAN y
     ARCH_LITTLE_ENDIAN y
-    UCLIBC_HAS_FPU n
+  ''
+  + lib.optionalString stdenv.hostPlatform.isBigEndian ''
+    ARCH_WANTS_BIG_ENDIAN y
+    ARCH_BIG_ENDIAN y
+    ARCH_WANTS_LITTLE_ENDIAN n
+    ARCH_LITTLE_ENDIAN n
   '';
 in
 stdenv.mkDerivation (finalAttrs: {
@@ -70,9 +76,8 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-X386r92yygj7KVvkVWHAGIQHED10Rs/SZLm4Iv7T7S0=";
   };
 
-  # 'ftw' needed to build acl, a coreutils dependency
   configurePhase = ''
-    make defconfig
+    make defconfig ARCH=${stdenv.hostPlatform.linuxArch}
     ${configParser}
     cat << EOF | parseconfig
     ${nixConfig}
@@ -92,7 +97,7 @@ stdenv.mkDerivation (finalAttrs: {
   makeFlags = [
     "ARCH=${stdenv.hostPlatform.linuxArch}"
     "TARGET_ARCH=${stdenv.hostPlatform.linuxArch}"
-    "VERBOSE=1"
+    "V=1"
   ]
   ++ lib.optionals isCross [
     "CROSS=${stdenv.cc.targetPrefix}"
@@ -144,7 +149,7 @@ stdenv.mkDerivation (finalAttrs: {
       experimental and need more testing.
     '';
     license = lib.licenses.lgpl2Plus;
-    maintainers = [ ];
+    maintainers = with lib.maintainers; [ aleclearmind ];
     platforms = lib.platforms.linux;
     badPlatforms = lib.platforms.aarch64;
   };

pkgs/top-level/all-packages.nix

@@ -6975,7 +6975,7 @@ with pkgs;
     else if libc == "bionic" then
       bionic
     else if libc == "uclibc" then
-      uclibc
+      uclibc-ng
     else if libc == "avrlibc" then
       avrlibc
     else if libc == "newlib" && stdenv.hostPlatform.isMsp430 then