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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2006-02-01 03:06:25 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:22 -0800
commit98105d47d3d62eb68d06d85dd448699678d725fc (patch)
tree14bfef15ce1f4cb12dd5c90df3ee5846fbb4eb5b /arch/um
parent0c19585b0d2f6817dd9af607650d3f6cae2fd8bc (diff)
[PATCH] uml: comments about libc-conflict guards
While fixing myself the mktime conflict (which someone already merged), I also improved a few comments. Merge them up. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/Makefile14
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/um/Makefile b/arch/um/Makefile
index 4ab6270cd38..c58b657f009 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -47,13 +47,16 @@ ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include
endif
SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
-# -Dvmap=kernel_vmap affects everything, and prevents anything from
-# referencing the libpcap.o symbol so named.
+# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
+# named - it's a common symbol in libpcap, so we get a binary which crashes.
#
-# Same things for in6addr_loopback - found in libc.
+# Same things for in6addr_loopback and mktime - found in libc. For these two we
+# only get link-time error, luckily.
+#
+# These apply to USER_CFLAGS to.
-CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
- $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
+CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
+ $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
-Din6addr_loopback=kernel_in6addr_loopback
AFLAGS += $(ARCH_INCLUDE)
@@ -66,6 +69,7 @@ USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
# kernel_errno to separate them from the libc errno. This allows -fno-common
# in CFLAGS. Otherwise, it would cause ld to complain about the two different
# errnos.
+# These apply to kernelspace only.
CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
-Dmktime=kernel_mktime