2014-04-30 19:30:14 +08:00
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# Copyright (c) 2008-2014 Red Hat, Inc. All rights reserved.
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2013-05-14 05:39:51 +08:00
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#
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# This copyrighted material is made available to anyone wishing to use, modify,
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# copy, or redistribute it subject to the terms and conditions of the BSD
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# License. This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY expressed or implied, including the implied warranties
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# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. A copy of this license
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# is available at http://www.opensource.org/licenses. Any Red Hat trademarks that
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# are incorporated in the source code or documentation are not subject to the BSD
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# License and may only be used or replicated with the express permission of
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# Red Hat, Inc.
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# Makefile for libgloss/msp430.
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2014-10-23 09:49:49 +08:00
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DESTDIR =
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2013-05-14 05:39:51 +08:00
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VPATH = @srcdir@
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srcdir = @srcdir@
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objdir = .
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srcroot = $(srcdir)/../..
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objroot = $(objdir)/../..
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prefix = @prefix@
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exec_prefix = @exec_prefix@
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host_alias = @host_alias@
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target_alias = @target_alias@
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bindir = @bindir@
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libdir = @libdir@
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tooldir = $(exec_prefix)/$(target_alias)
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# Multilib support variables.
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# TOP is used instead of MULTI{BUILD,SRC}TOP.
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MULTIDIRS =
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MULTISUBDIR =
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MULTIDO = true
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MULTICLEAN = true
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INSTALL = @INSTALL@
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INSTALL_PROGRAM = @INSTALL_PROGRAM@
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INSTALL_DATA = @INSTALL_DATA@
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SHELL = /bin/sh
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CC = @CC@
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AS = @AS@
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AR = @AR@
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LD = @LD@
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RANLIB = @RANLIB@
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AR_FLAGS = rc
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OBJDUMP = `if [ -f ${objroot}/../binutils/objdump ] ; \
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then echo ${objroot}/../binutils/objdump ; \
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else t='$(program_transform_name)'; echo objdump | sed -e $$t ; fi`
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OBJCOPY = `if [ -f ${objroot}/../binutils/objcopy ] ; \
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then echo ${objroot}/../binutils/objcopy ; \
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else t='$(program_transform_name)'; echo objcopy | sed -e $$t ; fi`
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2015-05-05 19:45:38 +08:00
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SCRIPTS = $(srcdir)/msp430-sim.ld
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SCRIPTS += $(srcdir)/msp430xl-sim.ld
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SCRIPTS += $(srcdir)/intr_vectors.ld
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2013-09-18 15:38:13 +08:00
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MSP430: Remove .init/.fini sections
The .init/.fini sections are not required for msp430-elf, and add unnecessary
code bloat to the CRT library. These sections are specified as "unused" by
the MSP430 EABI.
.init existed to call __crt0_run_{init,preinit}_array which run through
the functions in .{init,preinit}_array.
__crt0_run_{init,preinit}_array are already dynamically included like the
other crt0 functions, so these can be placed before the call to main,
which ensures they are still called if needed.
With these functions moved, .init has no purpose and can be removed.
.fini existed to call __crt0_run_fini_array.
However, the "__msp430_fini" symbol which marks the start of .fini has
never been used, so no termination routines have ever been run for
msp430. On returning from main(), _exit() is called which just loops
forever.
So there is no current expectation that __crt0_run_fini_array will
get called by the CRT code. Further work is to ensure functions
registered with atexit can be optionally called during program termination,
and then __crt0_run_fini_array can be registered with atexit during
program initialization.
The mechanisms for supporting the "-minrt" option have also been removed.
"-minrt" enabled a "minimum runtime environment" by removing calls to
functions which run global static initializers and constructors. Since
this behaviour is now dynamic, and these functions are only included
when needed, the minrt versions of the CRT object files are no longer
required.
2019-07-24 17:45:49 +08:00
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CRT = gcrt0.o crt0.o
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SIM_BSP = libsim.a
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LIB_NOSYS = libnosys.a
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LIB_CRT = libcrt.a
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SIM_OBJS = syscalls.o \
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cio.o \
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write.o \
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unlink.o \
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sbrk.o
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2015-12-18 05:49:08 +08:00
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NOSYS_OBJS = ciosyscalls.o \
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cio.o \
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write.o \
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unlink.o \
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sbrk.o
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2014-01-30 10:46:34 +08:00
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# Each crt_*.o is built from crt0.S using -DL*. crt0.o is built from
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# crt0.s with -DL0 via the default rule below.
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CRT_OBJS = \
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crt_bss.o \
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crt_high_bss.o \
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crt_movedata.o \
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crt_move_highdata.o \
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crt_main.o \
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crt_callexit.o \
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crt_run_init_array.o \
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crt_run_preinit_array.o \
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crt_run_fini_array.o \
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crt_run_array.o \
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crt_init.o
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2013-09-18 15:38:13 +08:00
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2013-05-14 05:39:51 +08:00
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#### Host specific Makefile fragment comes in here.
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@host_makefile_frag@
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2015-12-18 05:49:08 +08:00
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all: $(CRT) $(SIM_BSP) $(LIB_NOSYS) $(LIB_CRT) copy_scripts_to_objdir
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crt_%.o : crt0.S
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$(CC) -DL$* -Wa,-gdwarf2 -Wa,-I$(srcdir) $(CFLAGS_FOR_TARGET) $(INCLUDES) $(CFLAGS) -c $< -o $@
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2013-05-14 05:39:51 +08:00
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# Override .S.o rule to pass assembler debugging flags
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.S.o:
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$(CC) -DL0 -Wa,-gdwarf2 -Wa,-I$(srcdir) $(CFLAGS_FOR_TARGET) $(INCLUDES) $(CFLAGS) -c $<
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$(SIM_BSP): $(SIM_OBJS)
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$(AR) $(ARFLAGS) $@ $?
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$(RANLIB) $@
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$(LIB_NOSYS): $(NOSYS_OBJS)
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$(AR) $(ARFLAGS) $@ $?
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$(RANLIB) $@
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2013-09-18 15:38:13 +08:00
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$(LIB_CRT): $(CRT_OBJS)
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$(AR) $(ARFLAGS) $@ $?
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$(RANLIB) $@
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2013-05-14 05:39:51 +08:00
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copy_scripts_to_objdir: $(SCRIPTS)
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cp $(SCRIPTS) $(objdir)
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# Dependencies
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SDEPS = $(srcdir)/cio.h
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abort.o : $(SDEPS)
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argv.o : $(SDEPS)
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argvlen.o : $(SDEPS)
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chdir.o : $(SDEPS)
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chmod.o : $(SDEPS)
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close.o : $(SDEPS)
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exit.o : $(SDEPS)
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fstat.o : $(SDEPS)
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getpid.o : $(SDEPS)
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gettimeofday.o : $(SDEPS)
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gcrt0.o: gcrt0.S crt0.S
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kill.o : $(SDEPS)
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link.o : $(SDEPS)
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lseek.o : $(SDEPS)
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mcount.o : $(SDEPS)
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open.o : $(SDEPS)
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read.o : $(SDEPS)
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sigprocmask.o : $(SDEPS)
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sleep.o : $(SDEPS)
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stat.o : $(SDEPS)
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time.o : $(SDEPS)
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times.o : $(SDEPS)
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unlink.o : $(SDEPS)
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utime.o : $(SDEPS)
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write.o : $(SDEPS)
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2015-12-18 05:49:08 +08:00
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install: $(CRT) $(SIM_BSP) $(LIB_NOSYS) $(LIB_CRT) $(SCRIPTS)
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mkdir -p $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}
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for c in $(CRT) $(SIM_BSP) $(LIB_NOSYS) $(LIB_CRT); do \
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$(INSTALL_DATA) $$c $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}/$$c ;\
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done
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for c in $(SCRIPTS); do \
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b=`basename $$c`; \
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$(INSTALL_DATA) $$c $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}/$$b ;\
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done
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clean mostlyclean:
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rm -f *.o *.a
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distclean maintainer-clean realclean: clean
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rm -f Makefile config.cache config.log config.status
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.PHONY: info dvi doc install-info clean-info
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info doc dvi:
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install-info:
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clean-info:
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Makefile: Makefile.in config.status @host_makefile_frag_path@
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$(SHELL) config.status
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config.status: configure
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$(SHELL) config.status --recheck
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