From: Ivan Grokhotkov <ivan@espressif.com>
Date: Thu, 20 Oct 2016 08:10:51 +0000 (+0800)
Subject: build system: use -Og instead of -O0 for debug builds, expand help text in menuconfig
X-Git-Tag: v1.0~112^2~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=39a06319e245b7b4bd9ec5f8dbfe12d00a1c7940;p=esp-idf

build system: use -Og instead of -O0 for debug builds, expand help text in menuconfig
---

diff --git a/Kconfig b/Kconfig
index 936181a9cb..97da1f01f5 100644
--- a/Kconfig
+++ b/Kconfig
@@ -27,7 +27,10 @@ choice OPTIMIZATION_LEVEL
     prompt "Optimization level"
     default OPTIMIZATION_LEVEL_DEBUG
     help
-        This option sets compiler optimization level.
+        This option sets optimization level.
+        For "Release" setting, -Os flag is added to CFLAGS,
+         and -DNDEBUG flag is added to CPPFLAGS.
+        For "Debug" setting, -Og flag is added to CFLAGS.
 config OPTIMIZATION_LEVEL_DEBUG
     bool "Debug"
 config OPTIMIZATION_LEVEL_RELEASE
diff --git a/make/project.mk b/make/project.mk
index 9088eda85d..b646dfc419 100644
--- a/make/project.mk
+++ b/make/project.mk
@@ -179,7 +179,7 @@ ifneq ("$(CONFIG_OPTIMIZATION_LEVEL_RELEASE)","")
 OPTIMIZATION_FLAGS = -Os
 CPPFLAGS += -DNDEBUG
 else
-OPTIMIZATION_FLAGS = -O0
+OPTIMIZATION_FLAGS = -Og
 endif
 
 # Enable generation of debugging symbols