moved gcc config parsing logic to toml/gcc.rs

Author: Shourya742

src/bootstrap/src/core/config/parsing.rs

@@ -898,9 +898,7 @@ impl Config {
             };
         }
 
-        if let Some(t) = toml.target {
-            for (triple, cfg) in t {
-                let mut target = Target::from_triple(&triple);
+        config.apply_gcc_config(toml.gcc);
 
                 if let Some(ref s) = cfg.llvm_config {
                     if config.download_rustc_commit.is_some() && triple == *config.build.triple {

src/bootstrap/src/core/config/toml/gcc.rs

@@ -1,11 +1,26 @@
 use serde::{Deserialize, Deserializer};
 
+use crate::core::config::GccCiMode;
 use crate::core::config::toml::{Merge, ReplaceOpt};
-use crate::{HashSet, PathBuf, define_config, exit};
+use crate::{Config, HashSet, PathBuf, define_config, exit};
 
 define_config! {
     /// TOML representation of how the GCC build is configured.
     struct Gcc {
         download_ci_gcc: Option<bool> = "download-ci-gcc",
     }
 }
+
+impl Config {
+    pub fn apply_gcc_config(&mut self, toml_gcc: Option<Gcc>) {
+        if let Some(gcc) = toml_gcc {
+            self.gcc_ci_mode = match gcc.download_ci_gcc {
+                Some(value) => match value {
+                    true => GccCiMode::DownloadFromCi,
+                    false => GccCiMode::BuildLocally,
+                },
+                None => GccCiMode::default(),
+            };
+        }
+    }
+}