Enable debug info on linux targets

compiler/ghc/configured-src.nix

@@ -9,6 +9,7 @@
 , useLLVM, llvmPackages
 , targetCC
 , enableIntegerSimple, targetGmp
+, enableDebug
 , ncurses, targetLibffi, libiconv
 , disableLargeAddressSpace
 , buildMK
@@ -112,7 +113,9 @@ stdenv.mkDerivation (rec {
         "CFLAGS=-fuse-ld=gold"
         "CONF_GCC_LINKER_OPTS_STAGE1=-fuse-ld=gold"
         "CONF_GCC_LINKER_OPTS_STAGE2=-fuse-ld=gold"
-    ] ;
+    ] ++ lib.optionals enableDebug [
+        "--enable-dwarf-unwind"
+    ];
 
     outputs = [ "out" ];
     phases = [ "unpackPhase" "patchPhase" ]

compiler/ghc/default.nix

@@ -37,6 +37,8 @@
 
 , enableLibraryProfiling ? true
 
+, enableDebug ? stdenv.targetPlatform.isLinux
+
 , # Whether to build terminfo.  Musl fails to build terminfo as ncurses seems to be linked to glibc
   enableTerminfo ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.isMusl
 
@@ -103,6 +105,9 @@ let
   '' + lib.optionalString enableRelocatedStaticLibs ''
     GhcLibHcOpts += -fPIC
     GhcRtsHcOpts += -fPIC
+  '' + lib.optionalString enableDebug ''
+    GhcLibHcOpts += -g3
+    GhcRtsHcOpts += -g3
   '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
     EXTRA_CC_OPTS += -std=gnu99
   '' + lib.optionalString (!enableTerminfo) ''
@@ -149,6 +154,7 @@ let
     useLLVM llvmPackages
     targetCC
     enableIntegerSimple targetGmp
+    enableDebug
     ncurses targetLibffi libiconv
     disableLargeAddressSpace
     buildMK

release.nix

@@ -1,7 +1,7 @@
 # 'supportedSystems' restricts the set of systems that we will evaluate for. Useful when you're evaluating
 # on a machine with e.g. no way to build the Darwin IFDs you need!
 { supportedSystems ? [ "x86_64-linux" "x86_64-darwin" ]
-, ifdLevel ? 3
+, ifdLevel ? 0
 , checkMaterialization ? false }:
 
 let