extconf.rb in d_heap-0.5.0

- old
+ new

@@ -2,15 +2,22 @@
 
 require "mkmf"
 
 # For testing in CI (because I don't otherwise have easy access to Mac OS):
 # $CFLAGS << " -D__D_HEAP_DEBUG" if /darwin/ =~ RUBY_PLATFORM
+# $CFLAGS << " -debug inline-debug-info "
+# $CFLAGS << " -g -ginline-points "
+# $CFLAGS << " -fno-omit-frame-pointer "
 
+# CONFIG["debugflags"] << " -ggdb3 -gstatement-frontiers -ginline-points "
+CONFIG["optflags"]  << " -O3 "
+CONFIG["optflags"]  << " -fno-omit-frame-pointer "
+CONFIG["warnflags"] << " -Werror"
+
 have_func "rb_gc_mark_movable" # since ruby-2.7
 
 check_sizeof("long")
 check_sizeof("unsigned long long")
 check_sizeof("long double")
 have_macro("LDBL_MANT_DIG", "float.h")
 
-CONFIG["warnflags"] << " -Werror"
 create_makefile("d_heap/d_heap")