04540f1549
Link time optimization is a technique for whole-program optimization. Instead of doing code generation during compilation, the compiler saves its intermediate representation to the object files. During the final linking step, it will then merge all the object files together and perform optimizations on the entire program. This can often reduce the final binary size, but also may increase the total compilation time. This patch introduces a Kconfig option for enabling link time optimization in libpayload. Since libpayload does no linking of its own, its LTO archive files will contain only IR and no generated code. Downstream projects will need to use LTO-aware tools when manipulating the archives (eg. gcc-ar and gcc-nm), but otherwise do not need to use LTO themselves -- the compiler will recognize which files are LTO and which are not, so enabling this option should mostly be "drop in". For example, when building coreinfo.elf using tinycurses libpayload: binary size compilation time default 114 KiB 11.49s LTO 95 KiB 10.36s In this case the total compilation time was actually shorter -- despite the final linking step taking longer, this was offset by the shorter compilation times for each individual file (since there is no code gen until the very end). Change-Id: I048f2ff6298ed0d891098942e1e8b29d35487b91 Signed-off-by: Jacob Garber <jgarber1@ualberta.ca> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38291 Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Martin Roth <martinroth@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
162 lines
6.4 KiB
Makefile
162 lines
6.4 KiB
Makefile
##
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##
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## Copyright (C) 2008 Advanced Micro Devices, Inc.
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## Copyright (C) 2008 Uwe Hermann <uwe@hermann-uwe.de>
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## Copyright (C) 2011 secunet Security Networks AG
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##
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## Redistribution and use in source and binary forms, with or without
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## modification, are permitted provided that the following conditions
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## are met:
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## 1. Redistributions of source code must retain the above copyright
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## notice, this list of conditions and the following disclaimer.
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## 2. Redistributions in binary form must reproduce the above copyright
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## notice, this list of conditions and the following disclaimer in the
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## documentation and/or other materials provided with the distribution.
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## 3. The name of the author may not be used to endorse or promote products
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## derived from this software without specific prior written permission.
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##
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## THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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## ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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## ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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## FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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## DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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## OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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## HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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## LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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## OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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## SUCH DAMAGE.
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##
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export KERNELVERSION := 0.2.0
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ARCHDIR-$(CONFIG_LP_ARCH_ARM) := arm
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ARCHDIR-$(CONFIG_LP_ARCH_ARM64) := arm64
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ARCHDIR-$(CONFIG_LP_ARCH_X86) := x86
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DESTDIR ?= install
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real-target: lib
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classes-$(CONFIG_LP_PCI) += libpci
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classes-$(CONFIG_LP_LIBC) += libc
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classes-$(CONFIG_LP_CURSES) += libcurses
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classes-$(CONFIG_LP_PDCURSES) += libmenu libform libpanel
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classes-$(CONFIG_LP_CBFS) += libcbfs
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classes-$(CONFIG_LP_LZMA) += liblzma
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classes-$(CONFIG_LP_LZ4) += liblz4
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classes-$(CONFIG_LP_REMOTEGDB) += libgdb
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libraries := $(classes-y)
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classes-y += head.o
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subdirs-y := arch/$(ARCHDIR-y)
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subdirs-y += crypto libc drivers libpci gdb
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subdirs-$(CONFIG_LP_CURSES) += curses
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subdirs-$(CONFIG_LP_CBFS) += libcbfs
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subdirs-$(CONFIG_LP_LZMA) += liblzma
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subdirs-$(CONFIG_LP_LZ4) += liblz4
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INCLUDES := -Iinclude -Iinclude/$(ARCHDIR-y) -I$(obj) -include include/kconfig.h
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CFLAGS += $(EXTRA_CFLAGS) $(INCLUDES) -Os -pipe -nostdinc -ggdb3
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CFLAGS += -nostdlib -fno-builtin -ffreestanding -fomit-frame-pointer
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CFLAGS += -ffunction-sections -fdata-sections
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CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wmissing-prototypes -Wvla
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CFLAGS += -Wwrite-strings -Wredundant-decls -Wno-trigraphs -Wimplicit-fallthrough
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CFLAGS += -Wstrict-aliasing -Wshadow -Werror
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ifeq ($(CONFIG_LP_LTO),y)
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CFLAGS += -flto
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endif
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$(obj)/libpayload-config.h: $(KCONFIG_AUTOHEADER)
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cmp $@ $< 2>/dev/null || cp $< $@
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library-targets = $(addsuffix .a,$(addprefix $(obj)/,$(libraries))) $(obj)/libpayload.a
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lib: $$(library-targets) $(obj)/head.o
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extract_nth=$(word $(1), $(subst |, ,$(2)))
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#######################################################################
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# Add handler for special include files
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$(call add-special-class,includes)
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includes-handler= \
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$(if $(wildcard $(1)$(call extract_nth,1,$(2))), \
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$(eval includes += $(1)$(2)))
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$(obj)/libpayload.a: $(foreach class,$(libraries),$$($(class)-objs))
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printf " AR $(subst $(CURDIR)/,,$(@))\n"
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$(AR) rc $@ $^
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$(obj)/%.a: $$(%-objs)
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printf " AR $(subst $(CURDIR)/,,$(@))\n"
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$(AR) rc $@ $^
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$(obj)/head.o: $(obj)/arch/$(ARCHDIR-y)/head.head.o.o
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printf " CP $(subst $(CURDIR)/,,$(@))\n"
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cp $^ $@
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install: real-target
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printf " INSTALL $(DESTDIR)/libpayload/lib\n"
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install -m 755 -d $(DESTDIR)/libpayload/lib
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for lib in $(library-targets); do \
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install -m 644 $$lib $(DESTDIR)/libpayload/lib/; \
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done
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install -m 644 arch/$(ARCHDIR-y)/libpayload.ldscript $(DESTDIR)/libpayload/lib/
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install -m 755 -d $(DESTDIR)/libpayload/lib/$(ARCHDIR-y)
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install -m 644 $(obj)/head.o $(DESTDIR)/libpayload/lib/$(ARCHDIR-y)
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printf " INSTALL $(DESTDIR)/libpayload/include\n"
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install -m 755 -d $(DESTDIR)/libpayload/include
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for file in `find include -name *.h -type f`; do \
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install -m 755 -d $(DESTDIR)/libpayload/`dirname $$file`; \
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install -m 644 $$file $(DESTDIR)/libpayload/$$file; \
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done
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install -m 644 $(obj)/libpayload-config.h $(DESTDIR)/libpayload/include
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$(foreach item,$(includes), \
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install -m 755 -d $(DESTDIR)/libpayload/include/$(call extract_nth,2,$(item)); \
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install -m 644 $(call extract_nth,1,$(item)) $(DESTDIR)/libpayload/include/$(call extract_nth,2,$(item)); )
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printf " INSTALL $(DESTDIR)/libpayload/bin\n"
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install -m 755 -d $(DESTDIR)/libpayload/bin
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install -m 755 bin/lpgcc $(DESTDIR)/libpayload/bin
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install -m 755 bin/lpas $(DESTDIR)/libpayload/bin
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install -m 644 bin/lp.functions $(DESTDIR)/libpayload/bin
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install -m 644 $(DOTCONFIG) $(DESTDIR)/libpayload/libpayload.config
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install -m 755 .xcompile $(DESTDIR)/libpayload/libpayload.xcompile
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clean-for-update-target:
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rm -f $(addsuffix .a,$(addprefix $(obj)/,$(libraries))) $(obj)/libpayload.a
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clean-target:
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prepare:
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junit.xml:
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echo '<?xml version="1.0" encoding="utf-8"?><testsuite>' > $@.tmp
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for i in $(filter-out %.old,$(wildcard configs/*)); do \
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$(MAKE) clean; \
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echo "Building libpayload for $$i"; \
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cp "$$i" junit_config; \
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$(MAKE) olddefconfig DOTCONFIG=junit_config V=$(V) Q=$(Q) 2>/dev/null >/dev/null; \
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echo "<testcase classname='libpayload' name='$$i'>" >> $@.tmp; \
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$(MAKE) V=$(V) Q=$(Q) CONFIG_LP_CCACHE=$(CONFIG_LP_CCACHE) DOTCONFIG=junit_config >> $@.tmp.2 2>&1 && type="system-out" || type="failure"; \
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if [ $$type = "failure" ]; then \
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echo "<failure type='buildFailed'>" >> $@.tmp; \
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else \
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echo "<$$type>" >> $@.tmp; \
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fi; \
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echo '<![CDATA[' >> $@.tmp; \
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cat $@.tmp.2 >> $@.tmp; \
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echo "]]></$$type>" >>$@.tmp; \
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rm -f $@.tmp.2; \
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echo "</testcase>" >> $@.tmp; \
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done
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echo "</testsuite>" >> $@.tmp
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echo "libpayload build complete, test results in $@"
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mv $@.tmp $@
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test-configs:
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for config in $(filter-out %.old,$(wildcard configs/*)); do \
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$(MAKE) clean; \
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cp "$$config" test_config; \
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echo "*** Making libpayload config $$config ***"; \
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$(MAKE) olddefconfig DOTCONFIG=test_config V=$(V) Q=$(Q) ; \
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$(MAKE) V=$(V) Q=$(Q) CONFIG_LP_CCACHE=$(CONFIG_LP_CCACHE) DOTCONFIG=test_config; \
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done
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