Make -g flag opt-in instead of opt-out

Author: warmwaffles

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
 ## [Unreleased](unreleased)
+### Changed
+- Debug build opt in, instead of opt out. `export DEBUG=yes` before compilation and it will add a `-g` to the compilation process.
 
 
 ## [0.7.3] - 2021-10-08

Makefile

@@ -19,7 +19,10 @@
 SRC = $(wildcard c_src/*.c)
 HEADERS = $(wildcard c_src/*.h)
 
-CFLAGS ?= -g -O2 -Wall
+CFLAGS ?= -O2 -Wall
+ifneq ($(DEBUG),)
+	CFLAGS += -g
+endif
 CFLAGS += -I"$(ERTS_INCLUDE_DIR)"
 CFLAGS += -Ic_src