added more debugging options for packages

diff --git a/Config.in b/Config.in
index d9bbb904a34a362c1a8469d79c3224106c5c120b..ca6bcc2c08c43f48d0e9330eca3a599199a4cd37 100644 (file)
--- a/Config.in
+++ b/Config.in
@@ -184,6 +184,43 @@ config BR2_RECENT
        help
          This option show recent versions of packages.
 
+config BR2_ENABLE_DEBUG
+       bool "build packages with debugging symbols"
+       default n
+       help
+         Build packages with debugging symbols
+         enabled
+
+if BR2_ENABLE_DEBUG
+choice
+       prompt "gcc debug level"
+       default BR2_DEBUG_2
+       help
+         Set the debug level for gcc
+
+config BR2_DEBUG_1
+       bool "debug level 1"
+       help
+         Debug level 1 produces minimal information, enough 
+         for making backtraces in parts of the program that 
+         you don't plan to debug. This includes descriptions 
+         of functions and external variables, but no information
+         about local variables and no line numbers.
+
+config BR2_DEBUG_2
+       bool "debug level 2"
+       help
+         The default gcc debug level is 2
+
+config BR2_DEBUG_3
+       bool "debug level 3"
+       help
+         Level 3 includes extra information, such as all the 
+         macro definitions present in the program. Some debuggers
+         support macro expansion when you use -g3.
+endchoice
+endif
+
 choice
        prompt "strip"
        default BR2_STRIP_strip
@@ -196,12 +233,14 @@ choice
 
 config BR2_STRIP_strip
        bool "strip"
+       depends !BR2_ENABLE_DEBUG
        help
          strip   is the normal strip command
 
 config BR2_STRIP_sstrip
        bool "sstrip"
        select BR2_PACKAGE_SSTRIP_HOST
+       depends !BR2_ENABLE_DEBUG
        help
          sstrip  is a strip that discards more than the normal strip
 
@@ -211,14 +250,71 @@ config BR2_STRIP_none
          none    do not strip (only for debugging!)
 endchoice
 
-if BR2_STRIP_none
-config BR2_ENABLE_DEBUG
-       bool "build packages with debugging symbols"
-       default n
+choice
+       prompt "gcc optimization level"
+       default BR2_OPTIMIZE_0
        help
-         Build packages with debugging symbols
-         enabled
-endif
+         Set the optimization level for gcc
+
+config BR2_OPTIMIZE_0
+       bool "optimization level 0"
+       help
+         Do not optimize. This is the default. 
+
+config BR2_OPTIMIZE_1
+       bool "optimization level 1"
+       help
+         Optimize. Optimizing compilation takes somewhat more time, 
+         and a lot more memory for a large function. With -O, the 
+         compiler tries to reduce code size and execution time, 
+         without performing any optimizations that take a great deal 
+         of compilation time. -O turns on the following optimization 
+         flags: -fdefer-pop -fdelayed-branch -fguess-branch-probability 
+         -fcprop-registers -floop-optimize -fif-conversion 
+         -fif-conversion2 -ftree-ccp -ftree-dce -ftree-dominator-opts 
+         -ftree-dse -ftree-ter -ftree-lrs -ftree-sra -ftree-copyrename 
+         -ftree-fre -ftree-ch -funit-at-a-time -fmerge-constants
+         -O also turns on -fomit-frame-pointer on machines where doing 
+         so does not interfere with debugging.
+
+config BR2_OPTIMIZE_2
+       bool "optimization level 2"
+       help
+         Optimize even more. GCC performs nearly all supported optimizations
+         that do not involve a space-speed tradeoff. The compiler does not 
+         perform loop unrolling or function inlining when you specify -O2. 
+         As compared to -O, this option increases both compilation time and 
+         the performance of the generated code. -O2 turns on all optimization 
+         flags specified by -O. It also turns on the following optimization 
+         flags: -fthread-jumps -fcrossjumping -foptimize-sibling-calls 
+         -fcse-follow-jumps -fcse-skip-blocks -fgcse  -fgcse-lm 
+         -fexpensive-optimizations -fstrength-reduce -frerun-cse-after-loop  
+         -frerun-loop-opt -fcaller-saves -fpeephole2 -fschedule-insns  
+         -fschedule-insns2 -fsched-interblock -fsched-spec -fregmove 
+         -fstrict-aliasing -fdelete-null-pointer-checks -freorder-blocks  
+         -freorder-functions -falign-functions -falign-jumps -falign-loops  
+         -falign-labels -ftree-vrp -ftree-pre
+         Please note the warning under -fgcse about invoking -O2 on programs
+         that use computed gotos.
+
+config BR2_OPTIMIZE_3
+       bool "optimization level 3"
+       help
+         Optimize yet more. -O3 turns on all optimizations specified by -O2 
+         and also turns on the -finline-functions, -funswitch-loops and 
+         -fgcse-after-reload options.
+
+config BR2_OPTIMIZE_S
+       bool "optimize for size"
+       help
+         Optimize for size. -Os enables all -O2 optimizations that do not 
+         typically increase code size. It also performs further optimizations
+         designed to reduce code size. -Os disables the following optimization 
+         flags: -falign-functions -falign-jumps -falign-loops -falign-labels  
+         -freorder-blocks -freorder-blocks-and-partition -fprefetch-loop-arrays
+         -ftree-vect-loop-version
+     
+endchoice
 
 config BR2_PREFER_STATIC_LIB
        bool "prefer static libraries"

diff --git a/package/Makefile.in b/package/Makefile.in
index 806a010dd24a1121ca461751a101c839edf1406b..ad8280db8799afdd976c2d1583d26f37c0069167 100644 (file)
--- a/package/Makefile.in
+++ b/package/Makefile.in
@@ -9,6 +9,31 @@ HOSTMAKE :=$(shell $(CONFIG_SHELL) -c "which $(HOSTMAKE)" || type -p $(HOSTMAKE)
 MAKE1:=$(HOSTMAKE) MAKE="$(firstword $(HOSTMAKE)) -j1"
 MAKE:=$(HOSTMAKE) -j$(BR2_JLEVEL)
 
+ifeq ($(BR2_OPTIMIZE_0),y)
+TARGET_OPTIMIZATION=-O0
+endif
+ifeq ($(BR2_OPTIMIZE_1),y)
+TARGET_OPTIMIZATION=-O1
+endif
+ifeq ($(BR2_OPTIMIZE_2),y)
+TARGET_OPTIMIZATION=-O2
+endif
+ifeq ($(BR2_OPTIMIZE_3),y)
+TARGET_OPTIMIZATION=-O3
+endif
+ifeq ($(BR2_OPTIMIZE_S),y)
+TARGET_OPTIMIZATION=-Os
+endif
+ifeq ($(BR2_DEBUG_1),y)
+TARGET_DEBUGGING=-g1
+endif
+ifeq ($(BR2_DEBUG_2),y)
+TARGET_DEBUGGING=-g2
+endif
+ifeq ($(BR2_DEBUG_3),y)
+TARGET_DEBUGGING=-g3
+endif
+
 
 #########################################################################
 ifeq ($(BR2_TOOLCHAIN_SOURCE),y)