[PATCH 2/3] UML - Fix command-line CFLAGS and LDFLAGS support

[PATCH 2/3] UML - Fix command-line CFLAGS and LDFLAGS support

Post by Jeff Dik » Sat, 01 Dec 2007 01:50:09


[ 2.6.25 material ]

UML still needed some work in order to allow CFLAGS to be passed in
from the command line.

USER_CFLAGS is produced from KBUILD_CFLAGS in part by removing all the
-I switches. This is so that kernel headers don't accidentally get
pulled into libc files. However, a common use of command-line CFLAGS
would be to add -I switches to the build. This patch specifically
adds any command-line -I flags back to USER_CFLAGS.

I also corrected the spelling of LFLAGS to LDFLAGS.

Signed-off-by: Jeff Dike < XXXX@XXXXX.COM >
---
arch/um/Makefile | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

Index: linux-2.6.22/arch/um/Makefile
===================================================================
--- linux-2.6.22.orig/arch/um/Makefile 2007-11-14 12:58:04.000000000 -0500
+++ linux-2.6.22/arch/um/Makefile 2007-11-18 11:10:02.000000000 -0500
@@ -49,7 +49,7 @@ SYS_DIR := $(ARCH_DIR)/include/sysdep-$
#
# These apply to USER_CFLAGS to.

-KBUILD_CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
+KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
-Din6addr_loopback=kernel_in6addr_loopback \
-Din6addr_any=kernel_in6addr_any
@@ -58,7 +58,7 @@ KBUILD_AFLAGS += $(ARCH_INCLUDE)

USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
$(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
- -D_FILE_OFFSET_BITS=64
+ $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64

include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)

@@ -130,7 +130,7 @@ CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DST
# The wrappers will select whether using "malloc" or the kernel allocator.
LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc

-LD_FLAGS_CMDLINE = $(foreach opt,$(LFLAGS),-Wl,$(opt))
+LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))

CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
define cmd_vmlinux__
-
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