This patch moves the auto detection functions for cross compilation from
roms/Makefile to rules.mak. So the functions can be shared among Makefiles
in QEMU.
Signed-off-by: Wei Huang
---
roms/Makefile | 24 +++-
rules.mak | 15 +++
2 files changed, 22 insertions(+), 17 deletions(-)
diff --git a/roms/Makefile b/roms/Makefile
index b5e5a69e91..e972c65333 100644
--- a/roms/Makefile
+++ b/roms/Makefile
@@ -21,23 +21,6 @@ pxe-rom-virtio efi-rom-virtio : DID := 1000
pxe-rom-vmxnet3 efi-rom-vmxnet3 : VID := 15ad
pxe-rom-vmxnet3 efi-rom-vmxnet3 : DID := 07b0
-#
-# cross compiler auto detection
-#
-path := $(subst :, ,$(PATH))
-system := $(shell uname -s | tr "A-Z" "a-z")
-
-# first find cross binutils in path
-find-cross-ld = $(firstword $(wildcard $(patsubst
%,%/$(1)-*$(system)*-ld,$(path
-# then check we have cross gcc too
-find-cross-gcc = $(firstword $(wildcard $(patsubst %ld,%gcc,$(call
find-cross-ld,$(1)
-# finally strip off path + toolname so we get the prefix
-find-cross-prefix = $(subst gcc,,$(notdir $(call find-cross-gcc,$(1
-
-powerpc64_cross_prefix := $(call find-cross-prefix,powerpc64)
-powerpc_cross_prefix := $(call find-cross-prefix,powerpc)
-x86_64_cross_prefix := $(call find-cross-prefix,x86_64)
-
# tag our seabios builds
SEABIOS_EXTRAVERSION="-prebuilt.qemu-project.org"
@@ -66,6 +49,13 @@ default:
@echo " skiboot-- update skiboot.lid"
@echo " u-boot.e500-- update u-boot.e500"
+SRC_PATH=..
+include $(SRC_PATH)/rules.mak
+
+powerpc64_cross_prefix := $(call find-cross-prefix,powerpc64)
+powerpc_cross_prefix := $(call find-cross-prefix,powerpc)
+x86_64_cross_prefix := $(call find-cross-prefix,x86_64)
+
bios: build-seabios-config-seabios-128k build-seabios-config-seabios-256k
cp seabios/builds/seabios-128k/bios.bin ../pc-bios/bios.bin
cp seabios/builds/seabios-256k/bios.bin ../pc-bios/bios-256k.bin
diff --git a/rules.mak b/rules.mak
index 6e943335f3..ef8adee3f8 100644
--- a/rules.mak
+++ b/rules.mak
@@ -62,6 +62,21 @@ expand-objs = $(strip $(sort $(filter %.o,$1)) \
$(foreach o,$(filter %.mo,$1),$($o-objs)) \
$(filter-out %.o %.mo,$1))
+# Cross compilation auto detection. Use find-cross-prefix to detect the
+# target archtecture's prefix, and then append it to the build tool or pass
+# it to CROSS_COMPILE directly. Here is one example:
+# x86_64_cross_prefix := $(call find-cross-prefix,x86_64)
+# $(x86_64_cross_prefix)gcc -c test.c -o test.o
+# make -C testdir CROSS_COMPILE=$(x86_64_cross_prefix)
+cross-search-path := $(subst :, ,$(PATH))
+cross-host-system := $(shell uname -s | tr "A-Z" "a-z")
+
+find-cross-ld = $(firstword $(wildcard $(patsubst \
+%,%/$(1)-*$(cross-host-system)*-ld,$(cross-search-path
+find-cross-gcc = $(firstword $(wildcard \
+$(patsubst %ld,%gcc,$(call find-cross-ld,$(1)
+find-cross-prefix = $(subst gcc,,$(notdir $(call find-cross-gcc,$(1
+
%.o: %.c
$(call quiet-command,$(CC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
$(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
--
2.14.3
