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

   1 Index: linux-2.4.35.4/arch/mips/Makefile
   2 ===================================================================
   3 --- linux-2.4.35.4.orig/arch/mips/Makefile      2007-12-15 05:19:44.870978088 +0100
   4 +++ linux-2.4.35.4/arch/mips/Makefile   2007-12-15 05:19:50.987326639 +0100
   5 @@ -44,10 +44,10 @@
   6  GCCFLAGS       := -I $(TOPDIR)/include/asm/gcc
   7  GCCFLAGS       += -G 0 -mno-abicalls -fno-pic -pipe
   8  GCCFLAGS       += $(call check_gcc, -finline-limit=100000,)
   9 -LINKFLAGS      += -G 0 -static -n
  10 -MODFLAGS       += -mlong-calls
  11 +LINKFLAGS      += -G 0 -static -n -nostdlib
  12 +MODFLAGS       += -mlong-calls -fno-common
  13
  14 -ifdef CONFIG_DEBUG_INFO
  15 +ifdef CONFIG_REMOTE_DEBUG
  16  GCCFLAGS       += -g
  17  ifdef CONFIG_SB1XXX_CORELIS
  18  GCCFLAGS       += -mno-sched-prolog -fno-omit-frame-pointer
  19 @@ -69,13 +69,13 @@
  20  set_gccflags = $(shell \
  21  while :; do \
  22         cpu=$(1); isa=-$(2); \
  23 -       for gcc_opt in -march= -mcpu=; do \
  24 +       for gcc_opt in -march= -mtune=; do \
  25                 $(CC) $$gcc_opt$$cpu $$isa -S -o /dev/null \
  26                         -xc /dev/null > /dev/null 2>&1 && \
  27                         break 2; \
  28         done; \
  29         cpu=$(3); isa=-$(4); \
  30 -       for gcc_opt in -march= -mcpu=; do \
  31 +       for gcc_opt in -march= -mtune=; do \
  32                 $(CC) $$gcc_opt$$cpu $$isa -S -o /dev/null \
  33                         -xc /dev/null > /dev/null 2>&1 && \
  34                         break 2; \
  35 @@ -90,7 +90,7 @@
  36  fi; \
  37  gas_abi=-Wa,-32; gas_cpu=$$cpu; gas_isa=-Wa,$$isa; \
  38  while :; do \
  39 -       for gas_opt in -Wa,-march= -Wa,-mcpu=; do \
  40 +       for gas_opt in -Wa,-march= -Wa,-mtune=; do \
  41                 $(CC) $$gas_abi $$gas_opt$$cpu $$gas_isa -Wa,-Z -c \
  42                         -o /dev/null -xassembler /dev/null > /dev/null 2>&1 && \
  43                         break 2; \
  44 @@ -172,6 +172,7 @@
  45  endif
  46
  47  AFLAGS         += $(GCCFLAGS)
  48 +ASFLAGS                += $(GCCFLAGS)
  49  CFLAGS         += $(GCCFLAGS)
  50
  51  LD             += -m $(ld-emul)
  52 Index: linux-2.4.35.4/Makefile
  53 ===================================================================
  54 --- linux-2.4.35.4.orig/Makefile        2007-12-15 05:19:45.074989715 +0100
  55 +++ linux-2.4.35.4/Makefile     2007-12-15 05:19:50.995327098 +0100
  56 @@ -17,7 +17,7 @@
  57  FINDHPATH      = $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net $(HPATH)/math-emu
  58
  59  HOSTCC         = gcc
  60 -HOSTCFLAGS     = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  61 +HOSTCFLAGS     = -Wall -Wstrict-prototypes -Os -fomit-frame-pointer
  62
  63  CROSS_COMPILE  =
  64
  65 @@ -88,10 +88,9 @@
  66  #
  67  # standard CFLAGS
  68  #
  69 -
  70  CPPFLAGS := -D__KERNEL__ -I$(HPATH)
  71
  72 -CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
  73 +CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  74           -fno-strict-aliasing -fno-common
  75  CFLAGS += -fno-builtin-strpbrk -fno-builtin-sprintf
  76  ifndef CONFIG_FRAME_POINTER
  77 @@ -105,6 +104,8 @@
  78  # disable pointer signedness warnings in gcc 4.0
  79  CFLAGS += $(call check_gcc,-Wno-pointer-sign,)
  80
  81 +CFLAGS += $(call check_gcc, -funit-at-a-time,)
  82 +
  83  #
  84  # ROOT_DEV specifies the default root-device when making the image.
  85  # This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case