target/linux/linux-2.4/patches/generic/050-build_flags.patch

   1 diff -ur linux-2.4.32/arch/mips/Makefile linux-2.4.32-openwrt/arch/mips/Makefile
   2 --- linux-2.4.32/arch/mips/Makefile     2005-12-15 13:53:59.000000000 +0100
   3 +++ linux-2.4.32-openwrt/arch/mips/Makefile     2005-12-15 14:02:33.000000000 +0100
   4 @@ -44,10 +44,10 @@
   5  GCCFLAGS       := -I $(TOPDIR)/include/asm/gcc
   6  GCCFLAGS       += -G 0 -mno-abicalls -fno-pic -pipe
   7  GCCFLAGS       += $(call check_gcc, -finline-limit=100000,)
   8 -LINKFLAGS      += -G 0 -static -n
   9 -MODFLAGS       += -mlong-calls
  10 +LINKFLAGS      += -G 0 -static -n -nostdlib
  11 +MODFLAGS       += -mlong-calls -fno-common
  12
  13 -ifdef CONFIG_DEBUG_INFO
  14 +ifdef CONFIG_REMOTE_DEBUG
  15  GCCFLAGS       += -g
  16  ifdef CONFIG_SB1XXX_CORELIS
  17  GCCFLAGS       += -mno-sched-prolog -fno-omit-frame-pointer
  18 @@ -69,13 +69,13 @@
  19  set_gccflags = $(shell \
  20  while :; do \
  21         cpu=$(1); isa=-$(2); \
  22 -       for gcc_opt in -march= -mcpu=; do \
  23 +       for gcc_opt in -march= -mtune=; do \
  24                 $(CC) $$gcc_opt$$cpu $$isa -S -o /dev/null \
  25                         -xc /dev/null > /dev/null 2>&1 && \
  26                         break 2; \
  27         done; \
  28         cpu=$(3); isa=-$(4); \
  29 -       for gcc_opt in -march= -mcpu=; do \
  30 +       for gcc_opt in -march= -mtune=; do \
  31                 $(CC) $$gcc_opt$$cpu $$isa -S -o /dev/null \
  32                         -xc /dev/null > /dev/null 2>&1 && \
  33                         break 2; \
  34 @@ -90,7 +90,7 @@
  35  fi; \
  36  gas_abi=-Wa,-32; gas_cpu=$$cpu; gas_isa=-Wa,$$isa; \
  37  while :; do \
  38 -       for gas_opt in -Wa,-march= -Wa,-mcpu=; do \
  39 +       for gas_opt in -Wa,-march= -Wa,-mtune=; do \
  40                 $(CC) $$gas_abi $$gas_opt$$cpu $$gas_isa -Wa,-Z -c \
  41                         -o /dev/null -xassembler /dev/null > /dev/null 2>&1 && \
  42                         break 2; \
  43 @@ -172,6 +172,7 @@
  44  endif
  45
  46  AFLAGS         += $(GCCFLAGS)
  47 +ASFLAGS                += $(GCCFLAGS)
  48  CFLAGS         += $(GCCFLAGS)
  49
  50  LD             += -m $(ld-emul)
  51 diff -ur linux-2.4.32/Makefile linux-2.4.32-openwrt/Makefile
  52 --- linux-2.4.32/Makefile       2005-12-15 13:53:59.000000000 +0100
  53 +++ linux-2.4.32-openwrt/Makefile       2005-12-15 13:59:30.000000000 +0100
  54 @@ -17,7 +17,7 @@
  55  FINDHPATH      = $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net $(HPATH)/math-emu
  56
  57  HOSTCC         = gcc
  58 -HOSTCFLAGS     = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  59 +HOSTCFLAGS     = -Wall -Wstrict-prototypes -Os -fomit-frame-pointer
  60
  61  CROSS_COMPILE  =
  62
  63 @@ -88,10 +88,9 @@
  64  #
  65  # standard CFLAGS
  66  #
  67 -
  68  CPPFLAGS := -D__KERNEL__ -I$(HPATH)
  69
  70 -CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
  71 +CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  72           -fno-strict-aliasing -fno-common
  73  CFLAGS += -fno-builtin-sprintf
  74  ifndef CONFIG_FRAME_POINTER
  75 @@ -104,6 +103,8 @@
  76  # disable pointer signedness warnings in gcc 4.0
  77  CFLAGS += $(call check_gcc,-Wno-pointer-sign,)
  78
  79 +CFLAGS += $(call check_gcc, -funit-at-a-time,)
  80 +
  81  #
  82  # ROOT_DEV specifies the default root-device when making the image.
  83  # This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case