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| author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2005-07-14 00:33:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-14 09:00:25 -0700 |
| commit | 20d0021394c1b070bf04b22c5bc8fdb437edd4c5 (patch) | |
| tree | 283d0cd3bfdaec49ed2b29d568f5ceca5e3f1d2a /arch/um/Makefile-i386 | |
| parent | ecc354a90af90a80dcaccc750f5f3e5e7c83112d (diff) | |
| download | blackbird-obmc-linux-20d0021394c1b070bf04b22c5bc8fdb437edd4c5.tar.gz blackbird-obmc-linux-20d0021394c1b070bf04b22c5bc8fdb437edd4c5.zip | |
[PATCH] uml: allow building as 32-bit binary on 64bit host
This patch makes the command:
make ARCH=um SUBARCH=i386
work on x86_64 hosts (with support for building 32-bit binaries). This is
especially needed since 64-bit UMLs don't support 32-bit emulation for guest
binaries, currently. This has been tested in all possible cases and works.
Only exception is that I've built but not tested a 64-bit binary, because I
hadn't a 64-bit filesystem available.
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/Makefile-i386')
| -rw-r--r-- | arch/um/Makefile-i386 | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386 index 301059062a3e..93d0818fa816 100644 --- a/arch/um/Makefile-i386 +++ b/arch/um/Makefile-i386 @@ -1,4 +1,4 @@ -SUBARCH_CORE := arch/um/sys-i386/ arch/i386/crypto/ +core-y += arch/um/sys-i386/ arch/i386/crypto/ TOP_ADDR := $(CONFIG_TOP_ADDR) @@ -8,21 +8,32 @@ ifeq ($(CONFIG_MODE_SKAS),y) endif endif +LDFLAGS += -m elf_i386 +ELF_ARCH := $(SUBARCH) +ELF_FORMAT := elf32-$(SUBARCH) +OBJCOPYFLAGS := -O binary -R .note -R .comment -S + +ifeq ("$(origin SUBARCH)", "command line") +ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)") +CFLAGS += $(call cc-option,-m32) +USER_CFLAGS += $(call cc-option,-m32) +HOSTCFLAGS += $(call cc-option,-m32) +HOSTLDFLAGS += $(call cc-option,-m32) +AFLAGS += $(call cc-option,-m32) +LINK-y += $(call cc-option,-m32) +UML_OBJCOPYFLAGS += -F $(ELF_FORMAT) + +export LDFLAGS HOSTCFLAGS HOSTLDFLAGS UML_OBJCOPYFLAGS +endif +endif + CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH) $(STUB_CFLAGS) -ARCH_USER_CFLAGS := ifneq ($(CONFIG_GPROF),y) ARCH_CFLAGS += -DUM_FASTCALL endif -ELF_ARCH := $(SUBARCH) -ELF_FORMAT := elf32-$(SUBARCH) - -OBJCOPYFLAGS := -O binary -R .note -R .comment -S - -SYS_UTIL_DIR := $(ARCH_DIR)/sys-i386/util - -SYS_HEADERS := $(SYS_DIR)/sc.h $(SYS_DIR)/thread.h +SYS_HEADERS := $(SYS_DIR)/sc.h $(SYS_DIR)/thread.h prepare: $(SYS_HEADERS) |
