gcc: Fix deps, for cross and consistency

Mainly making sure we have tools to build target libs

pkgs/development/compilers/gcc/4.5/default.nix

@@ -233,8 +233,18 @@ stdenv.mkDerivation ({
   nativeBuildInputs = [ texinfo which gettext ]
     ++ optional (perl != null) perl;
 
-  buildInputs = [ gmp mpfr libmpc libelf ]
+  # For building runtime libs
-    ++ (optional (ppl != null) ppl)
+  depsBuildTarget =
+    if hostPlatform == buildPlatform then [
+      targetPackages.stdenv.cc.bintools # newly-built gcc will be used
+    ] else assert targetPlatform == hostPlatform; [ # build != host == target
+      stdenv.cc
+    ];
+
+  buildInputs = [
+    gmp mpfr libmpc libelf
+    targetPackages.stdenv.cc.bintools # For linking code at run-time
+  ] ++ (optional (ppl != null) ppl)
     ++ (optional (cloogppl != null) cloogppl)
     ++ (optional (zlib != null) zlib)
     ++ (optional langJava boehmgc)

pkgs/development/compilers/gcc/4.9/default.nix

@@ -267,8 +267,18 @@ stdenv.mkDerivation ({
     ++ (optional (perl != null) perl)
     ++ (optional javaAwtGtk pkgconfig);
 
-  buildInputs = [ gmp mpfr libmpc libelf ]
+  # For building runtime libs
-    ++ (optional (cloog != null) cloog)
+  depsBuildTarget =
+    if hostPlatform == buildPlatform then [
+      targetPackages.stdenv.cc.bintools # newly-built gcc will be used
+    ] else assert targetPlatform == hostPlatform; [ # build != host == target
+      stdenv.cc
+    ];
+
+  buildInputs = [
+    gmp mpfr libmpc libelf
+    targetPackages.stdenv.cc.bintools # For linking code at run-time
+  ] ++ (optional (cloog != null) cloog)
     ++ (optional (isl != null) isl)
     ++ (optional (zlib != null) zlib)
     ++ (optionals langJava [ boehmgc zip unzip ])

pkgs/development/compilers/gcc/5/default.nix

@@ -49,9 +49,6 @@ assert libelf != null -> zlib != null;
 # Make sure we get GNU sed.
 assert hostPlatform.isDarwin -> gnused != null;
 
-# Need c++filt on darwin
-assert hostPlatform.isDarwin -> targetPackages.stdenv.cc.bintools or null != null;
-
 # The go frontend is written in c++
 assert langGo -> langCC;
 
@@ -282,8 +279,18 @@ stdenv.mkDerivation ({
     ++ (optional (perl != null) perl)
     ++ (optional javaAwtGtk pkgconfig);
 
-  buildInputs = [ gmp mpfr libmpc libelf ]
+  # For building runtime libs
-    ++ (optional (isl != null) isl)
+  depsBuildTarget =
+    if hostPlatform == buildPlatform then [
+      targetPackages.stdenv.cc.bintools # newly-built gcc will be used
+    ] else assert targetPlatform == hostPlatform; [ # build != host == target
+      stdenv.cc
+    ];
+
+  buildInputs = [
+    gmp mpfr libmpc libelf
+    targetPackages.stdenv.cc.bintools # For linking code at run-time
+  ] ++ (optional (isl != null) isl)
     ++ (optional (zlib != null) zlib)
     ++ (optionals langJava [ boehmgc zip unzip ])
     ++ (optionals javaAwtGtk ([ gtk2 libart_lgpl ] ++ xlibs))

pkgs/development/compilers/gcc/6/default.nix

@@ -49,9 +49,6 @@ assert libelf != null -> zlib != null;
 # Make sure we get GNU sed.
 assert hostPlatform.isDarwin -> gnused != null;
 
-# Need c++filt on darwin
-assert hostPlatform.isDarwin -> targetPackages.stdenv.cc.bintools or null != null;
-
 # The go frontend is written in c++
 assert langGo -> langCC;
 
@@ -281,8 +278,18 @@ stdenv.mkDerivation ({
     ++ (optional (perl != null) perl)
     ++ (optional javaAwtGtk pkgconfig);
 
-  buildInputs = [ gmp mpfr libmpc libelf ]
+  # For building runtime libs
-    ++ (optional (isl != null) isl)
+  depsBuildTarget =
+    if hostPlatform == buildPlatform then [
+      targetPackages.stdenv.cc.bintools # newly-built gcc will be used
+    ] else assert targetPlatform == hostPlatform; [ # build != host == target
+      stdenv.cc
+    ];
+
+  buildInputs = [
+    gmp mpfr libmpc libelf
+    targetPackages.stdenv.cc.bintools # For linking code at run-time
+  ] ++ (optional (isl != null) isl)
     ++ (optional (zlib != null) zlib)
     ++ (optionals langJava [ boehmgc zip unzip ])
     ++ (optionals javaAwtGtk ([ gtk2 libart_lgpl ] ++ xlibs))

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

@@ -50,9 +50,6 @@ assert libelf != null -> zlib != null;
 # Make sure we get GNU sed.
 assert hostPlatform.isDarwin -> gnused != null;
 
-# Need c++filt on darwin
-assert hostPlatform.isDarwin -> targetPackages.stdenv.cc.bintools or null != null;
-
 # The go frontend is written in c++
 assert langGo -> langCC;
 
@@ -278,8 +275,18 @@ stdenv.mkDerivation ({
     ++ (optional (perl != null) perl)
     ++ (optional javaAwtGtk pkgconfig);
 
-  buildInputs = [ gmp mpfr libmpc libelf flex ]
+  # For building runtime libs
-    ++ (optional (isl != null) isl)
+  depsBuildTarget =
+    if hostPlatform == buildPlatform then [
+      targetPackages.stdenv.cc.bintools # newly-built gcc will be used
+    ] else assert targetPlatform == hostPlatform; [ # build != host == target
+      stdenv.cc
+    ];
+
+  buildInputs = [
+    gmp mpfr libmpc libelf flex
+    targetPackages.stdenv.cc.bintools # For linking code at run-time
+  ] ++ (optional (isl != null) isl)
     ++ (optional (zlib != null) zlib)
     ++ (optionals langJava [ boehmgc zip unzip ])
     ++ (optionals javaAwtGtk ([ gtk2 libart_lgpl ] ++ xlibs))

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

@@ -50,9 +50,6 @@ assert libelf != null -> zlib != null;
 # Make sure we get GNU sed.
 assert hostPlatform.isDarwin -> gnused != null;
 
-# Need c++filt on darwin
-assert hostPlatform.isDarwin -> targetPackages.stdenv.cc.bintools or null != null;
-
 # The go frontend is written in c++
 assert langGo -> langCC;
 
@@ -265,8 +262,18 @@ stdenv.mkDerivation ({
     ++ (optional (perl != null) perl)
     ++ (optional javaAwtGtk pkgconfig);
 
-  buildInputs = [ gmp mpfr libmpc libelf flex ]
+  # For building runtime libs
-    ++ (optional (isl != null) isl)
+  depsBuildTarget =
+    if hostPlatform == buildPlatform then [
+      targetPackages.stdenv.cc.bintools # newly-built gcc will be used
+    ] else assert targetPlatform == hostPlatform; [ # build != host == target
+      stdenv.cc
+    ];
+
+  buildInputs = [
+    gmp mpfr libmpc libelf flex
+    targetPackages.stdenv.cc.bintools # For linking code at run-time
+  ] ++ (optional (isl != null) isl)
     ++ (optional (zlib != null) zlib)
     ++ (optionals langJava [ boehmgc zip unzip ])
     ++ (optionals javaAwtGtk ([ gtk2 libart_lgpl ] ++ xlibs))