Enable PGO + LTO in Sandcastle job

Summary: To make these work we need to make LLVM's runtime profiling library/llvm-ar or a newer version of GCC available on Sandcastle hosts. I've gone with making GCC-14 available as this also matches the cibuildwheel build we have on GitHub and so will help keep our internal and external builds consistent.

Reviewed By: alexmalyshev

Differential Revision: D87987135

fbshipit-source-id: 5670450efb6fdb6520c828f3ee7ea504a64b79dc

Author: jbower-fb

build/fbcode_builder/getdeps/builder.py

@@ -1415,6 +1415,10 @@ class SetupPyBuilder(BuilderBase):
     def _build(self, reconfigure) -> None:
         env = self._compute_env()
 
+        setup_env = self.manifest.get_section_as_dict("setup-py.env", self.ctx)
+        for key, value in setup_env.items():
+            env[key] = value
+
         setup_py_path = os.path.join(self.src_dir, "setup.py")
 
         if not os.path.exists(setup_py_path):

build/fbcode_builder/getdeps/manifest.py

@@ -124,6 +124,7 @@
     # fb-only
     "sandcastle": {"optional_section": True, "fields": {"run_tests": OPTIONAL}},
     "setup-py.test": {"optional_section": True, "fields": {"python_script": REQUIRED}},
+    "setup-py.env": {"optional_section": True},
 }
 
 # These sections are allowed to vary for different platforms

build/fbcode_builder/manifests/cinderx-3_14

@@ -22,3 +22,7 @@ fbcode/cinderx/oss_toplevel = .
 
 [setup-py.test]
 python_script = cinderx/PythonLib/test_cinderx/test_oss_quick.py
+
+[setup-py.env]
+CINDERX_ENABLE_PGO=1
+CINDERX_ENABLE_LTO=1