# -------------------------------
# Standard Autoconf-set variables
# -------------------------------
VPATH=@srcdir@

build_alias=@build_alias@
build_vendor=@build_vendor@
build_os=@build_os@
build=@build@
host_alias=@host_alias@
host_vendor=@host_vendor@
host_os=@host_os@
host=@host@
target_alias=@target_alias@
target_vendor=@target_vendor@
target_os=@target_os@
target_cpu=@target_cpu@
target=@target@

program_transform_name = @program_transform_name@

prefix = @prefix@
exec_prefix = @exec_prefix@

srcdir = @srcdir@

bindir = @bindir@
sbindir = @sbindir@
libexecdir = @libexecdir@
datadir = @datadir@
sysconfdir = @sysconfdir@
sharedstatedir = @sharedstatedir@
localstatedir = @localstatedir@
libdir = @libdir@
includedir = @includedir@
oldincludedir = @oldincludedir@
infodir = @infodir@
datarootdir = @datarootdir@
docdir = @docdir@
pdfdir = @pdfdir@
htmldir = @htmldir@
mandir = @mandir@

builddir = @builddir@
abs_builddir = @abs_builddir@
#
# miscellaneous variables
#
TOPLEVEL_CONFIGURE_ARGUMENTS:=@TOPLEVEL_CONFIGURE_ARGUMENTS@
baseargs = @baseargs@
GCC_MIN_VERSION_4_3_0:=@GCC_MIN_VERSION_4_3_0@
PACKAGE_TO_SRCDIR:=@package_to_srcdir@
BUILD_ANDROID_GCC:=@BUILD_ANDROID_GCC@
GDB_TARGET:=@GDB_TARGET@

# We need to figure out how to get to top level source directory from
# a package build directory. 
# For host modules, accept cache file option, or specification as blank.


BINUTILS_VERSION=binutils-@BINUTILS_VERSION@
GCC_VERSION=gcc-@GCC_VERSION@
NEWLIB_VERSION=newlib-@NEWLIB_VERSION@
GMP_VERSION=gmp-@GMP_VERSION@
MPFR_VERSION=mpfr-@MPFR_VERSION@
GDB_VERSION=gdb-@GDB_VERSION@
STAMP=touch

TARGET_BINUTILS_BUILDDIR=$(abs_builddir)/$(BINUTILS_VERSION)
TARGET_GCC_BUILDDIR=$(abs_builddir)/$(GCC_VERSION)
TEMP_INSTALLDIR=$(abs_builddir)/temp-install

# We export these insteading when configuring target gcc and newlib
TARGET_BINUTILS_EXPORTS= \
export	AS_FOR_TARGET=$(TARGET_BINUTILS_BUILDDIR)/gas/as-new \
	LD_FOR_TARGET=$(TARGET_BINUTILS_BUILDDIR)/ld/ld-new \
	AR_FOR_TARGET=$(TARGET_BINUTILS_BUILDDIR)/binutils/ar \
	NM_FOR_TARGET=$(TARGET_BINUTILS_BUILDDIR)/binutils/nm-new \
	STRIP_FOR_TARGET=$(TARGET_BINUTILS_BUILDDIR)/binutils/strip-new \
	RANLIB_FOR_TARGET=$(TARGET_BINUTILS_BUILDDIR)/binutils/ranlib

TARGET_MINIMAL_GCC_EXPORTS= \
export	CC_FOR_TARGET="$(TARGET_GCC_BUILDDIR)/gcc/xgcc \
		      -B $(TARGET_GCC_BUILDDIR)/gcc \
		      -isystem $(TARGET_GCC_BUILDDIR)/gcc/include-fixed \
		      -isystem $(TARGET_GCC_BUILDDIR)/gcc/include"
#
# We need -Os as the overrides below interfere with --enable-target-optspace.
# We also need -mandroid for for target libraries to pass linking test
# in configuration.
# 
# To build libstdc++ with RTTI and exceptions do:
#
# CFLAGS_FOR_TARGET= -O2 -Os -g -fexceptions
# CXXFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET) -frtti
# 
CFLAGS_FOR_TARGET= -O2 -Os -g
CXXFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)
LDFLAGS_FOR_TARGET=-mandroid

# Helper
prefix-list = $(foreach e, $(2), $(join $1, $e))

# find source directory for package. This can either be <srcdir>/<package>
# or <objdir>/temp-src/<package>

find-package-srcdir = $(shell \
  if [ -f $(srcdir)/../$(firstword $(subst -, ,$1))/$(strip $1)/configure ]; then \
     echo $(PACKAGE_TO_SRCDIR)/../$(firstword $(subst -, ,$1))/$(strip $1); \
  elif [ -f $(abs_builddir)/temp-src/$(strip $1)/configure ]; then \
    echo $(abs_builddir)/temp-src/$(strip $1) ; \
  else \
    echo 'error cannot find $(strip $1)' ; \
  fi)

#
# Make rules
#

.PHONY: all clean

all: build

# top level
build: build-target-binutils build-target-gcc build-target-gdb

install: install-target-binutils install-target-gcc install-target-gdb

# target binutils rules
.PHONY: config-target-binutils build-target-binutils install-target-binutils
config-target-binutils: stmp-config-target-binutils
# We do not want to enable shared libraries in binutils
BINUTILS_CONFIG_ARGS=--prefix=$(prefix) \
	--target=${target_alias} --host=${host} --build=${build} \
	$(baseargs) --disable-shared
stmp-config-target-binutils: config.status
	([ -d ${BINUTILS_VERSION} ] || \
	  mkdir ${BINUTILS_VERSION}) && \
	(cd ${BINUTILS_VERSION} ; \
	 $(call find-package-srcdir, ${BINUTILS_VERSION})/configure \
	  $(BINUTILS_CONFIG_ARGS)) && \
	$(STAMP) $@
build-target-binutils: stmp-build-target-binutils
stmp-build-target-binutils: stmp-config-target-binutils
	$(MAKE) -C ${BINUTILS_VERSION} && $(STAMP) $@
install-target-binutils: stmp-build-target-binutils
	$(MAKE) -C ${BINUTILS_VERSION} install

# target gcc rules
.PHONY: config-target-gcc build-target-gcc install-target-gcc
config-target-gcc: stmp-config-target-gcc

GCC_CONFIG_ARGS=--prefix=$(prefix) \
	  --target=${target_alias} --host=${host} --build=${build} \
	  --enable-languages=c,c++

# For gcc versions 4.3.0 and later, gmp and mpfr are required.
# Also build libgcc is a seperate sub-target in 4.3.0+.
ifeq ($(GCC_MIN_VERSION_4_3_0),yes)
stmp-config-target-gcc: stmp-install-host-gmp stmp-install-host-mpfr
GCC_CONFIG_ARGS += --with-gmp=$(TEMP_INSTALLDIR) --with-mpfr=$(TEMP_INSTALLDIR)
endif

# Add Android specific gcc options.
# FIXME: These should be overridable by configure options.


# Target indenpendent Android gcc options.
ifeq ($(BUILD_ANDROID_GCC),yes)
GCC_CONFIG_ARGS += $(GCC_CONFIG_LIBSTDCXX_V3) --disable-libssp \
	--enable-threads --disable-nls --disable-libmudflap --disable-libgomp \
	--disable-libstdc__-v3 --disable-sjlj-exceptions --disable-shared \
	--disable-tls
CFLAGS_FOR_TARGET += -DTARGET_POSIX_IO -fno-short-enums
# ARM specific options.
ifeq ($(target_cpu),arm)
GCC_CONFIG_ARGS += --with-float=soft --with-fpu=vfp --with-arch=armv5te \
	--enable-target-optspace --with-abi=aapcs
endif

endif

# We add the baseargs and the end so that they override any default args
GCC_CONFIG_ARGS += $(baseargs)

# We have to add -mandroid in target CFLAGS and CXXFLAGS
stmp-config-target-gcc: config.status stmp-build-target-binutils
	([ -d ${GCC_VERSION} ] || \
	  mkdir ${GCC_VERSION}) && \
	(cd ${GCC_VERSION} ; \
	 $(TARGET_BINUTILS_EXPORTS) ; \
	 export CFLAGS_FOR_TARGET="$(CFLAGS_FOR_TARGET)" ; \
	 export CXXFLAGS_FOR_TARGET="$(CXXFLAGS_FOR_TARGET)" ; \
	 export LDFLAGS_FOR_TARGET="$(LDFLAGS_FOR_TARGET)" ; \
	 $(call find-package-srcdir, ${GCC_VERSION})/configure \
	   $(GCC_CONFIG_ARGS)) && \
	$(STAMP) $@
build-target-gcc: stmp-build-target-gcc
stmp-build-target-gcc: stmp-config-target-gcc
	$(MAKE) -C ${GCC_VERSION} \
		CFLAGS_FOR_TARGET="$(CFLAGS_FOR_TARGET)" \
		CXXFLAGS_FOR_TARGET="$(CXXFLAGS_FOR_TARGET)" \
		LDFLAGS_FOR_TARGET="$(LDFLAGS_FOR_TARGET)" \
	&& $(STAMP) $@
install-target-gcc: stmp-build-target-gcc
	$(MAKE) -C ${GCC_VERSION} install

# minimal gcc rules
# minimal gcc only builds the C and C++ compilers and libgcc
# We use the full gcc configure rules.
.PHONY: build-target-minimal-gcc install-target-minimal-gcc
ifeq ("$(GCC_MIN_VERSION_4_3_0)","yes")
MINIMAL_GCC_BUILD_TARGETS:= gcc target-libgcc 
else
MINIMAL_GCC_BUILD_TARGETS:= gcc
endif

build-target-minimal-gcc: stmp-build-target-minimal-gcc
stmp-build-target-minimal-gcc: stmp-config-target-gcc
	$(MAKE) -C ${GCC_VERSION} \
		$(call prefix-list, all-, $(MINIMAL_GCC_BUILD_TARGETS)) && \
	$(STAMP) $@
install-target-minimal-gcc: stmp-build-target-minimal-gcc
	$(MAKE) -C ${GCC_VERSION} \
		$(call prefix-list, install-, $(MINIMAL_GCC_BUILD_TARGETS))

# target newlib rules
.PHONY: config-target-newlib build-target-newlib install-target-newlib
config-target-newlib: stmp-config-target-newlib
NEWLIB_CONFIG_ARGS=$(baseargs) --prefix=$(prefix) \
	  --target=${target_alias} --host=${host} --build=${build}

stmp-config-target-newlib: stmp-build-target-binutils \
			   stmp-build-target-minimal-gcc
	([ -d ${NEWLIB_VERSION} ] || \
	  mkdir ${NEWLIB_VERSION}) && \
	(cd ${NEWLIB_VERSION} ; \
	 $(TARGET_BINUTILS_EXPORTS) ; \
	 $(TARGET_MINIMAL_GCC_EXPORTS) ; \
	 $(call find-package-srcdir, ${NEWLIB_VERSION})/configure \
	  $(NEWLIB_CONFIG_ARGS && \
	$(STAMP) $@
stmp-build-target-newlib: stmp-config-target-newlib
	$(MAKE) -C ${NEWLIB_VERSION} && $(STAMP) $@
install-target-newlib: stmp-build-target-newlib
	$(MAKE) -C ${NEWLIB_VERSION} install

# host gmp rules
.PHONY: config-host-gmp build-host-gmp install-host-gmp
config-host-gmp: stmp-config-host-gmp
GMP_CONFIG_ARGS=$(baseargs) --prefix=$(TEMP_INSTALLDIR) --disable-shared \
	  --host=${host} --build=${build}
stmp-config-host-gmp: config.status
	([ -d ${GMP_VERSION} ] || \
	  mkdir ${GMP_VERSION}) && \
	(cd ${GMP_VERSION} ; \
	 $(call find-package-srcdir, ${GMP_VERSION})/configure \
	  $(GMP_CONFIG_ARGS)) && \
	$(STAMP) $@
stmp-build-host-gmp: stmp-config-host-gmp
	$(MAKE) -C ${GMP_VERSION} && $(STAMP) $@
build-host-gmp: stmp-build-host-gmp
# Need -j1 to avoid a race condition in building on OS X.
stmp-install-host-gmp: stmp-build-host-gmp
	$(MAKE) -C ${GMP_VERSION} install -j1 && \
	$(STAMP) $@
install-host-gmp: stmp-install-host-gmp

# host mpfr rules
.PHONY: config-host-mpfr build-host-mpfr install-host-mpfr
config-host-mpfr: stmp-config-host-mpfr
MPFR_CONFIG_ARGS=$(baseargs) --prefix=$(TEMP_INSTALLDIR) --disable-shared \
	  --host=${host} --build=${build} --with-gmp=$(TEMP_INSTALLDIR)
stmp-config-host-mpfr: config.status stmp-install-host-gmp
	([ -d ${MPFR_VERSION} ] || \
	  mkdir ${MPFR_VERSION}) && \
	(cd ${MPFR_VERSION} ; \
	 $(call find-package-srcdir, ${MPFR_VERSION})/configure \
	  $(MPFR_CONFIG_ARGS)) && \
	$(STAMP) $@
stmp-build-host-mpfr: stmp-config-host-mpfr
	$(MAKE) -C ${MPFR_VERSION} && $(STAMP) $@
build-host-mpfr: stmp-build-host-mpfr
stmp-install-host-mpfr: stmp-build-host-mpfr
	$(MAKE) -C ${MPFR_VERSION} install && \
	$(STAMP) $@
install-host-mpfr: stmp-install-host-mpfr

# target gdb rules
.PHONY: config-target-gdb build-target-gdb install-target-gdb
config-target-gdb: stmp-config-target-gdb

GDB_CONFIG_ARGS=$(baseargs) --prefix=$(prefix) \
	  --target=$(GDB_TARGET) --host=${host} --build=${build}

stmp-config-target-gdb: config.status
	([ -d ${GDB_VERSION} ] || \
	  mkdir ${GDB_VERSION}) && \
	(cd ${GDB_VERSION} ; \
	 $(call find-package-srcdir, ${GDB_VERSION})/configure \
	  $(GDB_CONFIG_ARGS)) && \
	$(STAMP) $@
build-target-gdb: stmp-build-target-gdb
stmp-build-target-gdb: stmp-config-target-gdb
	$(MAKE) -C ${GDB_VERSION} && $(STAMP) $@
install-target-gdb: stmp-build-target-gdb
	$(MAKE) -C ${GDB_VERSION} install

# clean rules
.PHONY: clean
clean:
	$(RM) -r $(TEMP_INSTALLDIR) stmp-build-* stmp-install-* && \
	for sub in [ * ]; do \
	  if [ -f $$sub/Makefile ]; then \
	    $(MAKE) -C $$sub clean ; \
	  fi; \
	done