[rustc.git] / mk / reconfig.mk

# Copyright 2014 The Rust Project Developers. See the COPYRIGHT
# file at the top-level directory of this distribution and at
# http://rust-lang.org/COPYRIGHT.
#
# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
# option. This file may not be copied, modified, or distributed
# except according to those terms.

# Recursive wildcard function
# http://blog.jgc.org/2011/07/gnu-make-recursive-wildcard-function.html
rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) \
  $(filter $(subst *,%,$2),$d))

ifndef CFG_DISABLE_MANAGE_SUBMODULES
# This is a pretty expensive operation but I don't see any way to avoid it
# NB: This only looks for '+' status (wrong commit checked out), not '-' status
# (nothing checked out at all).  `./configure --{llvm,jemalloc}-root`
# will explicitly deinitialize the corresponding submodules, and we don't
# want to force constant rebuilds in that case.
NEED_GIT_RECONFIG=$(shell cd "$(CFG_SRC_DIR)" && $(CFG_GIT) submodule status | grep -c '^+')
else
NEED_GIT_RECONFIG=0
endif

ifeq ($(NEED_GIT_RECONFIG),0)
else
# If the submodules have changed then always execute config.mk
.PHONY: config.stamp
endif

Makefile config.mk: config.stamp

ifeq ($(SREL),)
SREL_ROOT := ./
else
SREL_ROOT := $(SREL)
endif

config.stamp: $(S)configure $(S)Makefile.in $(S)src/stage0.txt
	@$(call E, cfg: reconfiguring)
	$(SREL_ROOT)configure $(CFG_CONFIGURE_ARGS)
Commit	Line	Data
1a4d82fc JJ	1	# Copyright 2014 The Rust Project Developers. See the COPYRIGHT
	2	# file at the top-level directory of this distribution and at
	3	# http://rust-lang.org/COPYRIGHT.
	4	#
	5	# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
	6	# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
	7	# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
	8	# option. This file may not be copied, modified, or distributed
	9	# except according to those terms.
	10
	11	# Recursive wildcard function
	12	# http://blog.jgc.org/2011/07/gnu-make-recursive-wildcard-function.html
	13	rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) \
	14	$(filter $(subst *,%,$2),$d))
	15
	16	ifndef CFG_DISABLE_MANAGE_SUBMODULES
	17	# This is a pretty expensive operation but I don't see any way to avoid it
	18	# NB: This only looks for '+' status (wrong commit checked out), not '-' status
	19	# (nothing checked out at all). `./configure --{llvm,jemalloc}-root`
	20	# will explicitly deinitialize the corresponding submodules, and we don't
	21	# want to force constant rebuilds in that case.
	22	NEED_GIT_RECONFIG=$(shell cd "$(CFG_SRC_DIR)" && $(CFG_GIT) submodule status \| grep -c '^+')
	23	else
	24	NEED_GIT_RECONFIG=0
	25	endif
	26
	27	ifeq ($(NEED_GIT_RECONFIG),0)
	28	else
	29	# If the submodules have changed then always execute config.mk
	30	.PHONY: config.stamp
	31	endif
	32
	33	Makefile config.mk: config.stamp
	34
62682a34 SL	35	ifeq ($(SREL),)
	36	SREL_ROOT := ./
	37	else
	38	SREL_ROOT := $(SREL)
	39	endif
	40
a7813a04	41	config.stamp: $(S)configure $(S)Makefile.in $(S)src/stage0.txt
1a4d82fc	42	@$(call E, cfg: reconfiguring)
62682a34	43	$(SREL_ROOT)configure $(CFG_CONFIGURE_ARGS)