openwrt/target/linux/linux-2.4/patches/generic/006-build_flags.patch

   1 diff -urN linux.old/Makefile linux.dev/Makefile
   2 --- linux.old/Makefile  2005-08-26 13:41:41.689634168 +0200
   3 +++ linux.dev/Makefile  2005-08-26 13:44:34.233403528 +0200
   4 @@ -17,9 +17,9 @@
   5  FINDHPATH      = $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net $(HPATH)/math-emu
   6
   7  HOSTCC         = gcc
   8 -HOSTCFLAGS     = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
   9 +HOSTCFLAGS     = -Wall -Wstrict-prototypes -Os -fomit-frame-pointer
  10
  11 -CROSS_COMPILE  =
  12 +CROSS_COMPILE=
  13
  14  #
  15  # Include the make variables (CC, etc...)
  16 @@ -89,6 +89,8 @@
  17  # standard CFLAGS
  18  #
  19
  20 +check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
  21 +
  22  CPPFLAGS := -D__KERNEL__ -I$(HPATH)
  23
  24  CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  25 @@ -91,8 +93,10 @@
  26
  27  CPPFLAGS := -D__KERNEL__ -I$(HPATH)
  28
  29 -CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
  30 +CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  31           -fno-strict-aliasing -fno-common
  32 +
  33 +
  34  ifndef CONFIG_FRAME_POINTER
  35  CFLAGS += -fomit-frame-pointer
  36  endif
  37 @@ -100,6 +105,12 @@
  38  endif
  39  AFLAGS := -D__ASSEMBLY__ $(CPPFLAGS)
  40
  41 +CFLAGS += $(call check_gcc, -funit-at-a-time,)
  42 +
  43 +
  44 +
  45 +
  46 +
  47  #
  48  # ROOT_DEV specifies the default root-device when making the image.
  49  # This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case
  50 diff -urN linux.old/arch/mips/Makefile linux.dev/arch/mips/Makefile
  51 --- linux.old/arch/mips/Makefile        2005-11-07 23:12:50.582887000 +0100
  52 +++ linux.dev/arch/mips/Makefile        2005-11-07 21:57:08.537629000 +0100
  53 @@ -46,10 +46,10 @@
  54  GCCFLAGS       := -I $(TOPDIR)/include/asm/gcc
  55  GCCFLAGS       += -G 0 -mno-abicalls -fno-pic -pipe
  56  GCCFLAGS       += $(call check_gcc, -finline-limit=100000,)
  57 -LINKFLAGS      += -G 0 -static -n
  58 -MODFLAGS       += -mlong-calls
  59 +LINKFLAGS      += -G 0 -static -n -nostdlib
  60 +MODFLAGS       += -mlong-calls -fno-common
  61
  62 -ifdef CONFIG_DEBUG_INFO
  63 +ifdef CONFIG_REMOTE_DEBUG
  64  GCCFLAGS       += -g
  65  ifdef CONFIG_SB1XXX_CORELIS
  66  GCCFLAGS       += -mno-sched-prolog -fno-omit-frame-pointer
  67 @@ -71,13 +71,13 @@
  68  set_gccflags = $(shell \
  69  while :; do \
  70         cpu=$(1); isa=-$(2); \
  71 -       for gcc_opt in -march= -mcpu=; do \
  72 +       for gcc_opt in -march= -mtune=; do \
  73                 $(CC) $$gcc_opt$$cpu $$isa -S -o /dev/null \
  74                         -xc /dev/null > /dev/null 2>&1 && \
  75                         break 2; \
  76         done; \
  77         cpu=$(3); isa=-$(4); \
  78 -       for gcc_opt in -march= -mcpu=; do \
  79 +       for gcc_opt in -march= -mtune=; do \
  80                 $(CC) $$gcc_opt$$cpu $$isa -S -o /dev/null \
  81                         -xc /dev/null > /dev/null 2>&1 && \
  82                         break 2; \
  83 @@ -92,7 +92,7 @@
  84  fi; \
  85  gas_abi=-Wa,-32; gas_cpu=$$cpu; gas_isa=-Wa,$$isa; \
  86  while :; do \
  87 -       for gas_opt in -Wa,-march= -Wa,-mcpu=; do \
  88 +       for gas_opt in -Wa,-march= -Wa,-mtune=; do \
  89                 $(CC) $$gas_abi $$gas_opt$$cpu $$gas_isa -Wa,-Z -c \
  90                         -o /dev/null -xassembler /dev/null > /dev/null 2>&1 && \
  91                         break 2; \
  92 @@ -174,6 +174,7 @@
  93  endif
  94
  95  AFLAGS         += $(GCCFLAGS)
  96 +ASFLAGS                += $(GCCFLAGS)
  97  CFLAGS         += $(GCCFLAGS)
  98
  99  LD             += -m $(ld-emul)