7a3fdfbf67
This commit removes all morestack support from the compiler which entails: * Segmented stacks are no longer emitted in codegen. * We no longer build or distribute libmorestack.a * The `stack_exhausted` lang item is no longer required The only current use of the segmented stack support in LLVM is to detect stack overflow. This is no longer really required, however, because we already have guard pages for all threads and registered signal handlers watching for a segfault on those pages (to print out a stack overflow message). Additionally, major platforms (aka Windows) already don't use morestack. This means that Rust is by default less likely to catch stack overflows because if a function takes up more than one page of stack space it won't hit the guard page. This is what the purpose of morestack was (to catch this case), but it's better served with stack probes which have more cross platform support and no runtime support necessary. Until LLVM supports this for all platform it looks like morestack isn't really buying us much. cc #16012 (still need stack probes) Closes #26458 (a drive-by fix to help diagnostics on stack overflow)
350 lines
13 KiB
Makefile
350 lines
13 KiB
Makefile
# Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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# file at the top-level directory of this distribution and at
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# http://rust-lang.org/COPYRIGHT.
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#
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# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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# option. This file may not be copied, modified, or distributed
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# except according to those terms.
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################################################################################
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# Native libraries built as part of the rust build process
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#
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# This portion of the rust build system is meant to keep track of native
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# dependencies and how to build them. It is currently required that all native
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# dependencies are built as static libraries, as slinging around dynamic
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# libraries isn't exactly the most fun thing to do.
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#
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# This section should need minimal modification to add new libraries. The
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# relevant variables are:
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#
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# NATIVE_LIBS
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# This is a list of all native libraries which are built as part of the
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# build process. It will build all libraries into RT_OUTPUT_DIR with the
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# appropriate name of static library as dictated by the target platform
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#
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# NATIVE_DEPS_<lib>
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# This is a list of files relative to the src/rt directory which are
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# needed to build the native library. Each file will be compiled to an
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# object file, and then all the object files will be assembled into an
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# archive (static library). The list contains files of any extension
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#
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# If adding a new library, you should update the NATIVE_LIBS list, and then list
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# the required files below it. The list of required files is a list of files
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# that's per-target so you're allowed to conditionally add files based on the
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# target.
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################################################################################
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NATIVE_LIBS := rust_builtin hoedown miniz \
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rust_test_helpers morestack
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# $(1) is the target triple
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define NATIVE_LIBRARIES
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NATIVE_DEPS_hoedown_$(1) := hoedown/src/autolink.c \
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hoedown/src/buffer.c \
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hoedown/src/document.c \
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hoedown/src/escape.c \
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hoedown/src/html.c \
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hoedown/src/html_blocks.c \
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hoedown/src/html_smartypants.c \
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hoedown/src/stack.c \
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hoedown/src/version.c
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NATIVE_DEPS_miniz_$(1) = miniz.c
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NATIVE_DEPS_rust_builtin_$(1) := rust_builtin.c \
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rust_android_dummy.c
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NATIVE_DEPS_rust_test_helpers_$(1) := rust_test_helpers.c
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NATIVE_DEPS_morestack_$(1) := empty.c
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################################################################################
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# You shouldn't find it that necessary to edit anything below this line.
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################################################################################
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# While we're defining the native libraries for each target, we define some
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# common rules used to build files for various targets.
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RT_OUTPUT_DIR_$(1) := $(1)/rt
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$$(RT_OUTPUT_DIR_$(1))/%.o: $(S)src/rt/%.c $$(MKFILE_DEPS)
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@mkdir -p $$(@D)
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@$$(call E, compile: $$@)
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$$(Q)$$(call CFG_COMPILE_C_$(1), $$@, \
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$$(call CFG_CC_INCLUDE_$(1),$$(S)src/rt/hoedown/src) \
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$$(call CFG_CC_INCLUDE_$(1),$$(S)src/rt) \
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$$(RUNTIME_CFLAGS_$(1))) $$<
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$$(RT_OUTPUT_DIR_$(1))/%.o: $(S)src/rt/%.S $$(MKFILE_DEPS) \
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$$(LLVM_CONFIG_$$(CFG_BUILD))
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@mkdir -p $$(@D)
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@$$(call E, compile: $$@)
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$$(Q)$$(call CFG_ASSEMBLE_$(1),$$@,$$<)
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# On MSVC targets the compiler's default include path (e.g. where to find system
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# headers) is specified by the INCLUDE environment variable. This may not be set
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# so the ./configure script scraped the relevant values and this is the location
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# that we put them into cl.exe's environment.
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ifeq ($$(findstring msvc,$(1)),msvc)
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$$(RT_OUTPUT_DIR_$(1))/%.o: \
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export INCLUDE := $$(CFG_MSVC_INCLUDE_PATH_$$(HOST_$(1)))
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$(1)/rustllvm/%.o: \
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export INCLUDE := $$(CFG_MSVC_INCLUDE_PATH_$$(HOST_$(1)))
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endif
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endef
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$(foreach target,$(CFG_TARGET),$(eval $(call NATIVE_LIBRARIES,$(target))))
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# A macro for devining how to build third party libraries listed above (based
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# on their dependencies).
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#
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# $(1) is the target
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# $(2) is the lib name
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define THIRD_PARTY_LIB
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OBJS_$(2)_$(1) := $$(NATIVE_DEPS_$(2)_$(1):%=$$(RT_OUTPUT_DIR_$(1))/%)
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OBJS_$(2)_$(1) := $$(OBJS_$(2)_$(1):.c=.o)
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OBJS_$(2)_$(1) := $$(OBJS_$(2)_$(1):.cpp=.o)
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OBJS_$(2)_$(1) := $$(OBJS_$(2)_$(1):.S=.o)
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NATIVE_$(2)_$(1) := $$(call CFG_STATIC_LIB_NAME_$(1),$(2))
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$$(RT_OUTPUT_DIR_$(1))/$$(NATIVE_$(2)_$(1)): $$(OBJS_$(2)_$(1))
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@$$(call E, link: $$@)
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$$(Q)$$(call CFG_CREATE_ARCHIVE_$(1),$$@) $$^
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endef
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$(foreach target,$(CFG_TARGET), \
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$(eval $(call RUNTIME_RULES,$(target))))
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$(foreach lib,$(NATIVE_LIBS), \
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$(foreach target,$(CFG_TARGET), \
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$(eval $(call THIRD_PARTY_LIB,$(target),$(lib)))))
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################################################################################
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# Building third-party targets with external build systems
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#
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# This location is meant for dependencies which have external build systems. It
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# is still assumed that the output of each of these steps is a static library
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# in the correct location.
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################################################################################
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define DEF_THIRD_PARTY_TARGETS
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# $(1) is the target triple
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ifeq ($$(CFG_WINDOWSY_$(1)), 1)
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# This isn't necessarily a desired option, but it's harmless and works around
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# what appears to be a mingw-w64 bug.
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#
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# https://sourceforge.net/p/mingw-w64/bugs/395/
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JEMALLOC_ARGS_$(1) := --enable-lazy-lock
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else ifeq ($(OSTYPE_$(1)), apple-ios)
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JEMALLOC_ARGS_$(1) := --disable-tls
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else ifeq ($(findstring android, $(OSTYPE_$(1))), android)
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JEMALLOC_ARGS_$(1) := --disable-tls
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endif
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ifdef CFG_ENABLE_DEBUG_JEMALLOC
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JEMALLOC_ARGS_$(1) += --enable-debug --enable-fill
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endif
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################################################################################
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# jemalloc
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################################################################################
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ifdef CFG_ENABLE_FAST_MAKE
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JEMALLOC_DEPS := $(S)/.gitmodules
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else
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JEMALLOC_DEPS := $(wildcard \
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$(S)src/jemalloc/* \
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$(S)src/jemalloc/*/* \
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$(S)src/jemalloc/*/*/* \
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$(S)src/jemalloc/*/*/*/*)
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endif
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# See #17183 for details, this file is touched during the build process so we
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# don't want to consider it as a dependency.
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JEMALLOC_DEPS := $(filter-out $(S)src/jemalloc/VERSION,$(JEMALLOC_DEPS))
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JEMALLOC_NAME_$(1) := $$(call CFG_STATIC_LIB_NAME_$(1),jemalloc)
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ifeq ($$(CFG_WINDOWSY_$(1)),1)
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JEMALLOC_REAL_NAME_$(1) := $$(call CFG_STATIC_LIB_NAME_$(1),jemalloc_s)
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else
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JEMALLOC_REAL_NAME_$(1) := $$(call CFG_STATIC_LIB_NAME_$(1),jemalloc_pic)
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endif
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JEMALLOC_LIB_$(1) := $$(RT_OUTPUT_DIR_$(1))/$$(JEMALLOC_NAME_$(1))
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JEMALLOC_BUILD_DIR_$(1) := $$(RT_OUTPUT_DIR_$(1))/jemalloc
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JEMALLOC_LOCAL_$(1) := $$(JEMALLOC_BUILD_DIR_$(1))/lib/$$(JEMALLOC_REAL_NAME_$(1))
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$$(JEMALLOC_LOCAL_$(1)): $$(JEMALLOC_DEPS) $$(MKFILE_DEPS)
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@$$(call E, make: jemalloc)
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cd "$$(JEMALLOC_BUILD_DIR_$(1))"; "$(S)src/jemalloc/configure" \
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$$(JEMALLOC_ARGS_$(1)) --with-jemalloc-prefix=je_ $(CFG_JEMALLOC_FLAGS) \
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--build=$$(CFG_GNU_TRIPLE_$(CFG_BUILD)) --host=$$(CFG_GNU_TRIPLE_$(1)) \
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CC="$$(CC_$(1)) $$(CFG_JEMALLOC_CFLAGS_$(1))" \
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AR="$$(AR_$(1))" \
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RANLIB="$$(AR_$(1)) s" \
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CPPFLAGS="-I $(S)src/rt/" \
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EXTRA_CFLAGS="-g1 -ffunction-sections -fdata-sections"
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$$(Q)$$(MAKE) -C "$$(JEMALLOC_BUILD_DIR_$(1))" build_lib_static
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ifeq ($$(CFG_DISABLE_JEMALLOC),)
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RUSTFLAGS_alloc := --cfg jemalloc
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ifeq ($(1),$$(CFG_BUILD))
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ifneq ($$(CFG_JEMALLOC_ROOT),)
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$$(JEMALLOC_LIB_$(1)): $$(CFG_JEMALLOC_ROOT)/libjemalloc_pic.a
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@$$(call E, copy: jemalloc)
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$$(Q)cp $$< $$@
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else
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$$(JEMALLOC_LIB_$(1)): $$(JEMALLOC_LOCAL_$(1))
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$$(Q)cp $$< $$@
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endif
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else
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$$(JEMALLOC_LIB_$(1)): $$(JEMALLOC_LOCAL_$(1))
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$$(Q)cp $$< $$@
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endif
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else
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$$(JEMALLOC_LIB_$(1)): $$(MKFILE_DEPS)
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$$(Q)touch $$@
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endif
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################################################################################
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# compiler-rt
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################################################################################
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ifdef CFG_ENABLE_FAST_MAKE
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COMPRT_DEPS := $(S)/.gitmodules
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else
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COMPRT_DEPS := $(wildcard \
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$(S)src/compiler-rt/* \
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$(S)src/compiler-rt/*/* \
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$(S)src/compiler-rt/*/*/* \
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$(S)src/compiler-rt/*/*/*/*)
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endif
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COMPRT_NAME_$(1) := $$(call CFG_STATIC_LIB_NAME_$(1),compiler-rt)
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COMPRT_LIB_$(1) := $$(RT_OUTPUT_DIR_$(1))/$$(COMPRT_NAME_$(1))
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COMPRT_BUILD_DIR_$(1) := $$(RT_OUTPUT_DIR_$(1))/compiler-rt
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# Note that on MSVC-targeting builds we hardwire CC/AR to gcc/ar even though
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# we're targeting MSVC. This is because although compiler-rt has a CMake build
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# config I can't actually figure out how to use it, so I'm not sure how to use
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# cl.exe to build the objects. Additionally, the compiler-rt library when built
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# with gcc has the same ABI as cl.exe, so they're largely compatible
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COMPRT_CC_$(1) := $$(CC_$(1))
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COMPRT_AR_$(1) := $$(AR_$(1))
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COMPRT_CFLAGS_$(1) := $$(CFG_GCCISH_CFLAGS_$(1))
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ifeq ($$(findstring msvc,$(1)),msvc)
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COMPRT_CC_$(1) := gcc
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COMPRT_AR_$(1) := ar
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ifeq ($$(findstring i686,$(1)),i686)
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COMPRT_CFLAGS_$(1) := $$(CFG_GCCISH_CFLAGS_$(1)) -m32
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else
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COMPRT_CFLAGS_$(1) := $$(CFG_GCCISH_CFLAGS_$(1)) -m64
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endif
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endif
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$$(COMPRT_LIB_$(1)): $$(COMPRT_DEPS) $$(MKFILE_DEPS)
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@$$(call E, make: compiler-rt)
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$$(Q)$$(MAKE) -C "$(S)src/compiler-rt" \
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ProjSrcRoot="$(S)src/compiler-rt" \
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ProjObjRoot="$$(abspath $$(COMPRT_BUILD_DIR_$(1)))" \
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CC='$$(COMPRT_CC_$(1))' \
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AR='$$(COMPRT_AR_$(1))' \
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RANLIB='$$(COMPRT_AR_$(1)) s' \
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CFLAGS="$$(COMPRT_CFLAGS_$(1))" \
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TargetTriple=$(1) \
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triple-builtins
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$$(Q)cp $$(COMPRT_BUILD_DIR_$(1))/triple/builtins/libcompiler_rt.a $$@
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################################################################################
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# libbacktrace
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#
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# We use libbacktrace on linux to get symbols in backtraces, but only on linux.
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# Elsewhere we use other system utilities, so this library is only built on
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# linux.
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################################################################################
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BACKTRACE_NAME_$(1) := $$(call CFG_STATIC_LIB_NAME_$(1),backtrace)
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BACKTRACE_LIB_$(1) := $$(RT_OUTPUT_DIR_$(1))/$$(BACKTRACE_NAME_$(1))
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BACKTRACE_BUILD_DIR_$(1) := $$(RT_OUTPUT_DIR_$(1))/libbacktrace
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# We don't use this on platforms that aren't linux-based, so just make the file
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# available, the compilation of libstd won't actually build it.
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ifeq ($$(findstring darwin,$$(OSTYPE_$(1))),darwin)
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# See comment above
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$$(BACKTRACE_LIB_$(1)):
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touch $$@
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else
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ifeq ($$(findstring ios,$$(OSTYPE_$(1))),ios)
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# See comment above
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$$(BACKTRACE_LIB_$(1)):
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touch $$@
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else
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ifeq ($$(CFG_WINDOWSY_$(1)),1)
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# See comment above
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$$(BACKTRACE_LIB_$(1)):
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touch $$@
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else
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ifdef CFG_ENABLE_FAST_MAKE
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BACKTRACE_DEPS := $(S)/.gitmodules
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else
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BACKTRACE_DEPS := $(wildcard $(S)src/libbacktrace/*)
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endif
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# We need to export CFLAGS because otherwise it doesn't pick up cross compile
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# builds. If libbacktrace doesn't realize this, it will attempt to read 64-bit
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# elf headers when compiled for a 32-bit system, yielding blank backtraces.
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#
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# This also removes the -Werror flag specifically to prevent errors during
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# configuration.
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#
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# Down below you'll also see echos into the config.h generated by the
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# ./configure script. This is done to force libbacktrace to *not* use the
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# atomic/sync functionality because it pulls in unnecessary dependencies and we
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# never use it anyway.
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$$(BACKTRACE_BUILD_DIR_$(1))/Makefile: $$(BACKTRACE_DEPS) $$(MKFILE_DEPS)
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@$$(call E, configure: libbacktrace for $(1))
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$$(Q)rm -rf $$(BACKTRACE_BUILD_DIR_$(1))
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$$(Q)mkdir -p $$(BACKTRACE_BUILD_DIR_$(1))
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$$(Q)(cd $$(BACKTRACE_BUILD_DIR_$(1)) && \
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CC="$$(CC_$(1))" \
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AR="$$(AR_$(1))" \
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RANLIB="$$(AR_$(1)) s" \
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CFLAGS="$$(CFG_GCCISH_CFLAGS_$(1):-Werror=) -fno-stack-protector" \
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$(S)src/libbacktrace/configure --target=$(1) --host=$(CFG_BUILD))
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$$(Q)echo '#undef HAVE_ATOMIC_FUNCTIONS' >> \
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$$(BACKTRACE_BUILD_DIR_$(1))/config.h
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$$(Q)echo '#undef HAVE_SYNC_FUNCTIONS' >> \
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$$(BACKTRACE_BUILD_DIR_$(1))/config.h
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$$(BACKTRACE_LIB_$(1)): $$(BACKTRACE_BUILD_DIR_$(1))/Makefile $$(MKFILE_DEPS)
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@$$(call E, make: libbacktrace)
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$$(Q)$$(MAKE) -C $$(BACKTRACE_BUILD_DIR_$(1)) \
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INCDIR=$(S)src/libbacktrace
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$$(Q)cp $$(BACKTRACE_BUILD_DIR_$(1))/.libs/libbacktrace.a $$@
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endif # endif for windowsy
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endif # endif for ios
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endif # endif for darwin
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################################################################################
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# libc/libunwind for musl
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#
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# When we're building a musl-like target we're going to link libc/libunwind
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# statically into the standard library and liblibc, so we need to make sure
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# they're in a location that we can find
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################################################################################
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ifeq ($$(findstring musl,$(1)),musl)
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$$(RT_OUTPUT_DIR_$(1))/%: $$(CFG_MUSL_ROOT)/lib/%
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cp $$^ $$@
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endif
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endef
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# Instantiate template for all stages/targets
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$(foreach target,$(CFG_TARGET), \
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$(eval $(call DEF_THIRD_PARTY_TARGETS,$(target))))
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