Merge pull request #44767 from obsidiansystems/wrapper-env-var-path

{cc,bintools}-wrapper, ghc, libgcc: Define wrapper env vars as full paths

pkgs/build-support/cc-wrapper/setup-hook.sh

@@ -109,10 +109,10 @@ fi
 
 export NIX_${role_pre}CC=@out@
 
-export ${role_pre}CC=@named_cc@
-export ${role_pre}CXX=@named_cxx@
-export CC${role_post}=@named_cc@
-export CXX${role_post}=@named_cxx@
+export ${role_pre}CC=@out@/bin/@named_cc@
+export ${role_pre}CXX=@out@/bin/@named_cxx@
+export CC${role_post}=@out@/bin/@named_cc@
+export CXX${role_post}=@out@/bin/@named_cxx@
 
 # If unset, assume the default hardening flags.
 : ${NIX_HARDENING_ENABLE="fortify stackprotector pic strictoverflow format relro bindnow"}