[kernel] export rescan_partitions to prevent linking failures in block2mtd (#6741)

[openwrt.git] / toolchain / Makefile

diff --git a/toolchain/Makefile b/toolchain/Makefile
index 28ac81c..fa41787 100644 (file)
--- a/toolchain/Makefile
+++ b/toolchain/Makefile
@@ -1,45 +1,76 @@
+# 
+# Copyright (C) 2007-2009 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
 # Main makefile for the toolchain
-include $(TOPDIR)/rules.mk
-TARGETS:=sed utils binutils gcc uClibc ipkg-utils
+#
+# Steps:
+# 1) toolchain/binutils/install
+#    build & install binutils
+# 2) toolchain/gcc/prepare
+#    build & install a minimal gcc, needed for steps 3 & 4
+# 3) toolchain/kernel-headers/install
+#    install kernel headers, needed for step 4
+# 4) toolchain/libc/prepare
+#    build & install libc headers & support files, needed for step 5
+# 5) toolchain/gcc/compile
+#    build & install an initial gcc, needed for step 6
+# 6) toolchain/libc/compile
+#    build & install the final libc
+# 7) toolchain/gcc/install
+#    build & install the final gcc
+# 8) toolchain/libc/install
+#    build & install libc utilities
+#
 
-TARGETS_INSTALL:=$(patsubst %,%-install,$(TARGETS))
-TARGETS_CLEAN:=$(patsubst %,%-clean,$(TARGETS))
+curdir:=toolchain
 
-all: install
-install: $(TARGETS_INSTALL)
-clean: $(TARGETS_CLEAN)
+# subdirectories to descend into
+$(curdir)/builddirs := $(if $(CONFIG_GDB),gdb) $(if $(CONFIG_INSIGHT),insight) $(if $(CONFIG_EXTERNAL_TOOLCHAIN),,kernel-headers binutils gcc $(LIBC) $(if $(CONFIG_GLIBC_PORTS),glibc-ports))
+$(curdir)/builddirs-compile:=$($(curdir)/builddirs-prepare)
+$(curdir)/builddirs-install:=$($(curdir)/builddirs-compile)
 
-uClibc-prepare: kernel-headers-prepare sed-install utils-install
-binutils-prepare: uClibc-prepare
-gcc-prepare: binutils-install
-uClibc-compile: gcc-prepare
-gcc-compile: uClibc-install
+# builddir dependencies
+ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
+  $(curdir)/$(LIBC)/prepare:=$(curdir)/kernel-headers/install
+  $(curdir)/gcc/prepare:=$(curdir)/binutils/install
+  $(curdir)/kernel-headers/install:=$(curdir)/gcc/prepare
+  $(curdir)/gcc/compile:=$(curdir)/$(LIBC)/prepare
+  $(curdir)/$(LIBC)/compile:=$(curdir)/gcc/compile
+  $(curdir)/gcc/install:=$(curdir)/$(LIBC)/compile
+  $(curdir)/$(LIBC)/install:=$(curdir)/gcc/install
+  ifneq ($(CONFIG_GLIBC_PORTS),)
+    $(curdir)/glibc/prepare:=$(curdir)/glibc-ports/prepare
+  endif
+endif
 
-$(STAMP_DIR):
-       mkdir -p $(STAMP_DIR)
+ifdef CONFIG_GCC_VERSION_LLVM
+  $(curdir)/builddirs += llvm
+  $(curdir)/gcc/prepare += $(curdir)/llvm/install
+endif
 
-$(STAGING_DIR):
-       @mkdir -p $(STAGING_DIR)/lib
-       @mkdir -p $(STAGING_DIR)/include
-       @mkdir -p $(STAGING_DIR)/$(REAL_GNU_TARGET_NAME)
-       @ln -sf ../lib $(STAGING_DIR)/$(REAL_GNU_TARGET_NAME)/lib
+ifneq ($(ARCH),)
+  $(TOOLCHAIN_DIR)/info.mk: .config
+       @for dir in $(TOOLCHAIN_DIR); do ( \
+               set -x; \
+               mkdir -p "$$dir"; \
+               cd "$$dir"; \
+               mkdir -p stamp lib usr/include usr/lib ; \
+       ); done
+       @grep GCC_VERSION $@ >/dev/null 2>&1 || $(INSTALL_DATA) $(TOPDIR)/toolchain/info.mk $@
+       @touch $@
+endif
 
-$(TOOL_BUILD_DIR):
-       @mkdir -p $(TOOL_BUILD_DIR)
+# prerequisites for the individual targets
+$(curdir)/ := .config prereq
+$(curdir)//prepare = $(STAGING_DIR)/.prepared $(TOOLCHAIN_DIR)/info.mk
+$(curdir)//compile = $(1)/prepare
+$(curdir)//install = $(1)/compile
 
-%-prepare: $(STAMP_DIR) $(STAGING_DIR) $(TOOL_BUILD_DIR)
-       @[ -f $(STAMP_DIR)/.toolchain_$@ ] || $(MAKE) -C $(patsubst %-prepare,%,$@) prepare
-       @touch $(STAMP_DIR)/.toolchain_$@
+$(TOOLCHAIN_DIR)/stamp/.gcc-initial_installed:
 
-%-compile: %-prepare 
-       @[ -f $(STAMP_DIR)/.toolchain_$@ ] || $(MAKE) -C $(patsubst %-compile,%,$@) compile
-       @touch $(STAMP_DIR)/.toolchain_$@
-
-%-install: %-compile
-       @[ -f $(STAMP_DIR)/.toolchain_$@ ] || $(MAKE) -C $(patsubst %-install,%,$@) install
-       @touch $(STAMP_DIR)/.toolchain_$@
-
-%-clean:
-       @$(MAKE) -C $(patsubst %-clean,%,$@) clean
-       @rm -f $(STAMP_DIR)/.toolchain_$(patsubst %-clean,%,$@)-*
+$(eval $(call stampfile,$(curdir),toolchain,install,$(TOOLCHAIN_DIR)/stamp/.gcc-initial_installed,,$(TOOLCHAIN_DIR)))
+$(eval $(call subdir,$(curdir)))