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Reinstate DEBUG_PESSIMIZE (by Christian Ionescu-Idbohrn)

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This commit is contained in:
Denis Vlasenko 2008-06-12 20:23:03 +00:00
parent fdddab0c61
commit bd8390a872
2 changed files with 21 additions and 15 deletions
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23
Config.in
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@ -396,6 +396,17 @@ config DEBUG
Most people should answer N.
config DEBUG_PESSIMIZE
bool "Disable compiler optimizations."
default n
depends on DEBUG
help
The compiler's optimization of source code can eliminate and reorder
code, resulting in an executable that's hard to understand when
stepping through it with a debugger. This switches it off, resulting
in a much bigger executable that more closely matches the source
code.
config WERROR
bool "Abort compilation on any warning"
default n
@ -404,18 +415,6 @@ config WERROR
Most people should answer N.
# Seems to be unused
#config DEBUG_PESSIMIZE
# bool "Disable compiler optimizations."
# default n
# depends on DEBUG
# help
# The compiler's optimization of source code can eliminate and reorder
# code, resulting in an executable that's hard to understand when
# stepping through it with a debugger. This switches it off, resulting
# in a much bigger executable that more closely matches the source
# code.
choice
prompt "Additional debugging library"
default NO_DEBUG_LIB

13
Makefile.flags
View File

@ -35,7 +35,7 @@ endif
# gcc 3.x emits bogus "old style proto" warning on find.c:alloc_action()
CFLAGS += $(call cc-ifversion, -ge, 0400, -Wold-style-definition)
CFLAGS += $(call cc-option,-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,)
CFLAGS += $(call cc-option,-fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,)
# -fno-guess-branch-probability: prohibit pseudo-random guessing
# of branch probabilities (hopefully makes bloatcheck more stable):
CFLAGS += $(call cc-option,-fno-guess-branch-probability,)
@ -46,8 +46,15 @@ CFLAGS += $(call cc-option,-falign-functions=1 -falign-jumps=1 -falign-labels=1
# be fixed..
#CFLAGS+=$(call cc-option,-Wconversion,)
ifeq ($(CONFIG_DEBUG),y)
CFLAGS += $(call cc-option,-g)
ifneq ($(CONFIG_DEBUG),y)
CFLAGS += $(call cc-option,-Os,)
else
CFLAGS += $(call cc-option,-g,)
ifeq ($(CONFIG_DEBUG_PESSIMIZE),y)
CFLAGS += $(call cc-option,-O0,)
else
CFLAGS += $(call cc-option,-Os,)
endif
endif
# If arch/$(ARCH)/Makefile did not override it (with, say, -fPIC)...