treewide: Start to break up static overlay

We can use use `stdenv.hostPlatform.isStatic` instead, and move the
logic per package. The least opionated benefit of this is that it makes
it much easier to replace packages with modified ones, as there is no
longer any issue of overlay order.

CC @FRidh @matthewbauer

pkgs/development/compilers/gcc/10/default.nix

@@ -7,7 +7,7 @@
 , profiledCompiler ? false
 , langJit ? false
 , staticCompiler ? false
-, enableShared ? true
+, enableShared ? !stdenv.targetPlatform.isStatic
 , enableLTO ? true
 , texinfo ? null
 , perl ? null # optional, for texi2pod (then pod2man)

pkgs/development/compilers/gcc/4.8/default.nix

@@ -7,7 +7,7 @@
 , profiledCompiler ? false
 , langJit ? false
 , staticCompiler ? false
-, enableShared ? true
+, enableShared ? !stdenv.targetPlatform.isStatic
 , enableLTO ? true
 , texinfo ? null
 , perl ? null # optional, for texi2pod (then pod2man); required for Java

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

@@ -7,7 +7,7 @@
 , profiledCompiler ? false
 , langJit ? false
 , staticCompiler ? false
-, enableShared ? true
+, enableShared ? !stdenv.targetPlatform.isStatic
 , enableLTO ? true
 , texinfo ? null
 , perl ? null # optional, for texi2pod (then pod2man); required for Java

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

@@ -8,7 +8,7 @@
 , profiledCompiler ? false
 , langJit ? false
 , staticCompiler ? false
-, enableShared ? true
+, enableShared ? !stdenv.targetPlatform.isStatic
 , enableLTO ? true
 , texinfo ? null
 , flex

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

@@ -6,7 +6,7 @@
 , profiledCompiler ? false
 , langJit ? false
 , staticCompiler ? false
-, enableShared ? true
+, enableShared ? !stdenv.targetPlatform.isStatic
 , enableLTO ? true
 , texinfo ? null
 , perl ? null # optional, for texi2pod (then pod2man)

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

@@ -6,7 +6,7 @@
 , profiledCompiler ? false
 , langJit ? false
 , staticCompiler ? false
-, enableShared ? true
+, enableShared ? !stdenv.targetPlatform.isStatic
 , enableLTO ? true
 , texinfo ? null
 , perl ? null # optional, for texi2pod (then pod2man)

pkgs/development/compilers/gcc/9/default.nix

@@ -8,7 +8,7 @@
 , profiledCompiler ? false
 , langJit ? false
 , staticCompiler ? false
-, enableShared ? true
+, enableShared ? !stdenv.targetPlatform.isStatic
 , enableLTO ? true
 , texinfo ? null
 , perl ? null # optional, for texi2pod (then pod2man)