Consolidate codegen-related compiler flags

Move them all behind a new -C switch. This migrates some -Z flags and some
top-level flags behind this -C codegen option.

The -C flag takes values of the form "-C name=value" where the "=value" is
optional for some flags.

Flags affected:

* --llvm-args           => -C llvm-args
* --passes              => -C passes
* --ar                  => -C ar
* --linker              => -C linker
* --link-args           => -C link-args
* --target-cpu          => -C target-cpu
* --target-feature      => -C target-fature
* --android-cross-path  => -C android-cross-path
* --save-temps          => -C save-temps
* --no-rpath            => -C no-rpath
* -Z no-prepopulate     => -C no-prepopulate-passes
* -Z no-vectorize-loops => -C no-vectorize-loops
* -Z no-vectorize-slp   => -C no-vectorize-slp
* -Z soft-float         => -C soft-float
* -Z gen-crate-map      => -C gen-crate-map
* -Z prefer-dynamic     => -C prefer-dynamic
* -Z no-integrated-as   => -C no-integrated-as

As a bonus, this also promotes the -Z extra-debug-info flag to a first class -g
or --debuginfo flag.

* -Z debug-info         => removed
* -Z extra-debug-info   => -g or --debuginfo

Closes #9770
Closes #12000

1 files changed, 3 insertions, 3 deletions

diff --git a/src/compiletest/runtest.rs b/src/compiletest/runtest.rs
index 8edd923390a..f906c0fc4e1 100644
--- a/src/compiletest/runtest.rs
+++ b/src/compiletest/runtest.rs
@@ -332,8 +332,8 @@ fn run_debuginfo_test(config: &config, props: &TestProps, testfile: &Path) {
             let args = split_maybe_args(&config.rustcflags);
             let mut tool_path:~str = ~"";
             for arg in args.iter() {
-                if arg.contains("--android-cross-path=") {
-                    tool_path = arg.replace("--android-cross-path=","");
+                if arg.contains("android-cross-path=") {
+                    tool_path = arg.replace("android-cross-path=","");
                     break;
                 }
             }
@@ -1054,7 +1054,7 @@ fn compile_test_and_save_bitcode(config: &config, props: &TestProps,
     let aux_dir = aux_output_dir_name(config, testfile);
     // FIXME (#9639): This needs to handle non-utf8 paths
     let link_args = ~[~"-L", aux_dir.as_str().unwrap().to_owned()];
-    let llvm_args = ~[~"--emit=obj", ~"--crate-type=lib", ~"--save-temps"];
+    let llvm_args = ~[~"--emit=obj", ~"--crate-type=lib", ~"-C", ~"save-temps"];
     let args = make_compile_args(config, props,
                                  link_args + llvm_args,
                                  |a, b| ThisFile(make_o_name(a, b)), testfile);