Some tweaks to speed up building (#607)

* Allow configuring -O level with EDGEDB_OPT_CFLAG
* Add a probably broken Makefile rule that skips the touches

Author: msullivan

Makefile

@@ -36,6 +36,12 @@ compile: _touch
 	$(PYTHON) setup.py build_ext --inplace
 
 
+compile-fast:
+	rm -fr $(ROOT)/gel/datatypes/datatypes.c
+	rm -fr $(ROOT)/gel/protocol/protocol.c
+	$(PYTHON) setup.py build_ext --inplace
+
+
 gen-errors:
 	edb gen-errors --import "$(echo "from edgedb.errors._base import *"; echo "from edgedb.errors.tags import *")" \
 		--extra-all "_base.__all__" --stdout --client > $(ROOT)/.errors

setup.py

@@ -38,7 +38,10 @@
 
 CYTHON_DEPENDENCY = "Cython(>=3.0.11,<3.1.0)"
 
-CFLAGS = ["-O2"]
+if flag := os.environ.get('EDGEDB_OPT_CFLAG'):
+    CFLAGS = [flag]
+else:
+    CFLAGS = ["-O2"]
 SYSTEM = sys.platform
 
 if SYSTEM != "win32":