bd8390a87
Denis Vlasenko
2008-06-12
Subject
Reinstate DEBUG_PESSIMIZE (by Christian Ionescu-Idbohrn)
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Config.in+11 -12
| @@ -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 | |
Makefile.flags+10 -3
| @@ -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)... | |