Attention, people who care on the builders for native builds. In the stdenv

derivation, the "buildInputs" in every stdenv mkDerivation don't map now
directly to the environment
variable "buildInputs" in the builder, but "buildNativeInputs". So, the inputs
build by the native compiler.
When cross compiling, they will map to the environment variable "buildInputs"
(yes, now the same name), which means does to be built with the cross compiler.

I think I improved the naming of variables a bit. There was a big mess,
specially in the stdenv adapter for cross building, and also in the default
builder script.

I also tried to add proper manager of propagatedInputBuilds, these being
propagated considering the host or build origin of that input build (so, at the
end, being those propagatedInputBuilds being propagated properly to the native
or the cross compiler.


svn path=/nixpkgs/branches/stdenv-updates/; revision=18477

pkgs/build-support/gcc-cross-wrapper/setup-hook.sh

@@ -8,7 +8,7 @@ addCVars () {
     fi
 }
 
-envHooksHost=(${envHooksHost[@]} addCVars)
+crossEnvHooks=(${crossEnvHooks[@]} addCVars)
 
 # Note: these come *after* $out in the PATH (see setup.sh).
 
@@ -25,4 +25,3 @@ if test -n "@glibc@"; then
 fi
 
 configureFlags="$configureFlags --build=$system --host=$crossConfig"
-dontStrip=1

pkgs/stdenv/adapters.nix

@@ -111,20 +111,34 @@ rec {
   # builds.
   makeStdenvCross = stdenv: cross: binutilsCross: gccCross: stdenv //
     { mkDerivation = {name, buildInputs ? [], buildNativeInputs ? [],
-            propagatedBuildInputs ? [], ...}@args: let
-            # propagatedBuildInputs exists temporarily as another name for
-            # propagatedHostInputs.
+            propagatedBuildInputs ? [], propagatedBuildNativeInputs ? [], ...}@args: let
+
+            # *BuildInputs exists temporarily as another name for
+            # *HostInputs.
+
             getBuildDrv = drv : if (drv ? buildDrv) then drv.buildDrv else drv;
-            buildInputsDrvs = map (getBuildDrv) buildNativeInputs;
-            hostInputsDrvs = map (drv: drv.hostDrv) buildInputs;
-            hostInputsDrvsAsBuildInputs = map (getBuildDrv) buildInputs;
-            propagatedHostInputsDrvs = map (drv: drv.buildDrv) (propagatedBuildInputs);
+            buildNativeInputsDrvs = map (getBuildDrv) buildNativeInputs;
+            buildInputsDrvs = map (drv: drv.hostDrv) buildInputs;
+            buildInputsDrvsAsBuildInputs = map (getBuildDrv) buildInputs;
+            propagatedBuildInputsDrvs = map (drv: drv.hostDrv) (propagatedBuildInputs);
+            propagatedBuildNativeInputsDrvs = map (drv: drv.buildDrv)
+                (propagatedBuildNativeInputs);
+
+            # The base stdenv already knows that buildNativeInputs and
+            # buildInputs should be built with the usual gcc-wrapper
+            # And the same for propagatedBuildInputs.
             buildDrv = stdenv.mkDerivation args;
+
+            # We should overwrite the input attributes in hostDrv, to overwrite
+            # the defaults for only-native builds in the base stdenv
             hostDrv = if (cross == null) then buildDrv else
                 stdenv.mkDerivation (args // {
                     name = name + "-" + cross.config;
-                    buildInputs = buildInputsDrvs
+                    buildNativeInputs = buildNativeInputsDrvs
                       ++ [ gccCross binutilsCross ];
+                    buildInputs = buildInputsDrvs;
+                    propagatedBuildInputs = propagatedBuildInputsDrvs;
+                    propagatedBuildNativeInputs = propagatedBuildNativeInputsDrvs;
 
                     crossConfig = cross.config;
                 });

pkgs/stdenv/generic/default.nix

@@ -48,8 +48,13 @@ let
             // (let
                 buildInputs = if attrs ? buildInputs then attrs.buildInputs
                     else [];
-                buildNativeInputs = if attrs ? buildNativeInputs then attrs.buildNativeInputs
-                    else [];
+                buildNativeInputs = if attrs ? buildNativeInputs then
+                    attrs.buildNativeInputs else [];
+                propagatedBuildInputs = if attrs ? propagatedBuildInputs then
+                    attrs.propagatedBuildInputs else [];
+                propagatedBuildNativeInputs = if attrs ?
+                    propagatedBuildNativeInputs then
+                    attrs.propagatedBuildNativeInputs else [];
             in
             {
               builder = if attrs ? realBuilder then attrs.realBuilder else shell;
@@ -57,7 +62,14 @@ let
                 ["-e" (if attrs ? builder then attrs.builder else ./default-builder.sh)];
               stdenv = result;
               system = result.system;
-              buildInputs = buildInputs ++ buildNativeInputs;
+
+              # That build by the cross compiler
+              buildInputs = [];
+              propagatedBuildInputs = [];
+              # That build by the usual native compiler
+              buildNativeInputs = buildInputs ++ buildNativeInputs;
+              propagatedBuildNativeInputs = propagatedBuildInputs ++
+                propagatedBuildNativeInputs;
             }))
           )
           # The meta attribute is passed in the resulting attribute set,

pkgs/stdenv/generic/setup.sh

@@ -153,6 +153,7 @@ runHook addInputsHook
 findInputs() {
     local pkg=$1
     local var=$2
+    local propagatedBuildInputsFile=$3
 
     case ${!var} in
         *\ $pkg\ *)
@@ -166,27 +167,26 @@ findInputs() {
         source $pkg/nix-support/setup-hook
     fi
 
-    if test -f $pkg/nix-support/propagated-build-inputs; then
-        for i in $(cat $pkg/nix-support/propagated-build-inputs); do
+    if test -f $pkg/nix-support/$propagatedBuildInputsFile; then
+        for i in $(cat $pkg/nix-support/$propagatedBuildInputsFile); do
             findInputs $i $var
         done
     fi
 }
 
-pkgs=""
+crossPkgs=""
 for i in $buildInputs $propagatedBuildInputs; do
-    findInputs $i pkgs
+    findInputs $i crossPkgs propagated-build-inputs
 done
 
-hostPkgs=""
-for i in $hostInputs $propagatedBuildInputs; do
-    findInputs $i hostPkgs
+nativePkgs=""
+for i in $buildNativeInputs $propagatedBuildNativeInputs; do
+    findInputs $i nativePkgs propagated-build-native-inputs
 done
 
 # Set the relevant environment variables to point to the build inputs
 # found above.
-envHostHooks=()
-addToEnv() {
+addToNativeEnv() {
     local pkg=$1
 
     if test -d $1/bin; then
@@ -199,21 +199,22 @@ addToEnv() {
     done
 }
 
-for i in $pkgs; do
-    addToEnv $i
+for i in $nativePkgs; do
+    addToNativeEnv $i
 done
 
-addToEnvHost() {
+crossEnvHooks=()
+addToCrossEnv() {
     local pkg=$1
 
     # Run the package-specific hooks set by the setup-hook scripts.
-    for i in "${envHostHooks[@]}"; do
+    for i in "${crossEnvHooks[@]}"; do
         $i $pkg
     done
 }
 
-for i in $hostPkgs; do
-    addToEnvHost $i
+for i in $crossPkgs; do
+    addToCrossEnv $i
 done
 
 
@@ -716,6 +717,11 @@ fixupPhase() {
         echo "$propagatedBuildInputs" > "$out/nix-support/propagated-build-inputs"
     fi
 
+    if test -n "$propagatedBuildNativeInputs"; then
+        ensureDir "$out/nix-support"
+        echo "$propagatedBuildNativeInputs" > "$out/nix-support/propagated-build-native-inputs"
+    fi
+
     if test -n "$setupHook"; then
         ensureDir "$out/nix-support"
         substituteAll "$setupHook" "$out/nix-support/setup-hook"

pkgs/top-level/all-packages.nix

@@ -4195,7 +4195,7 @@ let
   };
 
   ncurses = makeOverridable (composedArgsAndFun (import ../development/libraries/ncurses)) {
-    inherit fetchurl stdenv;
+    inherit fetchurl stdenv ncurses;
     # The "! (stdenv ? cross)" is for the cross-built arm ncurses, which
     # don't build for me in unicode.
     unicode = (system != "i686-cygwin" && ! (stdenv ? cross));