gnat: init at 9.3.0

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

@@ -1,5 +1,6 @@
 { stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
+, langAda ? false
 , langObjC ? stdenv.targetPlatform.isDarwin
 , langObjCpp ? stdenv.targetPlatform.isDarwin
 , langGo ? false
@@ -13,6 +14,7 @@
 , libelf                      # optional, for link-time optimizations (LTO)
 , isl ? null # optional, for the Graphite optimization framework.
 , zlib ? null
+, gnatboot ? null
 , enableMultilib ? false
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
@@ -35,6 +37,7 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 
 # The go frontend is written in c++
 assert langGo -> langCC;
+assert langAda -> gnatboot != null;
 
 # threadsCross is just for MinGW
 assert threadsCross != null -> stdenv.targetPlatform.isWindows;
@@ -54,6 +57,7 @@ let majorVersion = "9";
         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 langAda ../gnat-cflags.patch
       ++ optional langFortran ../gfortran-driving.patch
       ++ optional (targetPlatform.libc == "musl" && targetPlatform.isPower) ../ppc-musl.patch
       ++ optional (!crossStageStatic && targetPlatform.isMinGW) (fetchpatch {
@@ -160,6 +164,7 @@ stdenv.mkDerivation ({
     # The builder relies on GNU sed (for instance, Darwin's `sed' fails with
     # "-i may not be used with stdin"), and `stdenvNative' doesn't provide it.
     ++ (optional hostPlatform.isDarwin gnused)
+    ++ (optional langAda gnatboot)
     ;
 
   depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
@@ -168,7 +173,7 @@ stdenv.mkDerivation ({
 
   preConfigure = import ../common/pre-configure.nix {
     inherit (stdenv) lib;
-    inherit version hostPlatform langGo;
+    inherit version hostPlatform gnatboot langAda langGo;
   };
 
   dontDisableStatic = true;
@@ -193,6 +198,7 @@ stdenv.mkDerivation ({
       langC
       langCC
       langFortran
+      langAda
       langGo
       langObjC
       langObjCpp
@@ -236,7 +242,7 @@ stdenv.mkDerivation ({
     ;
 
   passthru = {
-    inherit langC langCC langObjC langObjCpp langFortran langGo version;
+    inherit langC langCC langObjC langObjCpp langAda langFortran langGo version;
     isGNU = true;
   };