source: rtems/c/src/make/compilers/gcc-target-default.cfg @ 8fbe2e6

#
#  Shared compiler for all GNU tools configurations
# 

##
# CFLAGS_OPTIMIZE_V, CFLAGS_DEBUG_V are the values we
# would want the corresponding macros to be set to.
#
# CFLAGS_OPTIMIZE, CFLAGS_DEBUG are set in the leaf
# Makefiles by the 'debug:' targets to their _V values.
#

# default flags
# XCPPFLAGS, XCFLAGS, XCXXFLAGS, XASFLAGS 
# are used to add flags from the shell
# cf. make.info ("Implicit rules/variables" for details)

# NOTE: Should these go to CPPFLAGS ?
CFLAGS_DEFAULT=-Wall

# NOTE: CPU_CFLAGS should probably be renamed to CPU_CPPFLAGS
# NOTE: CPU_DEFINES should probably be merged with CPU_CFLAGS
CPPFLAGS += $(CPU_DEFINES) $(CPU_CFLAGS) $(DEFINES) $(XCPPFLAGS)
CFLAGS   = $(CFLAGS_DEFAULT) $(XCFLAGS)
CXXFLAGS = $(CFLAGS_DEFAULT) $(XCXXFLAGS)
ASFLAGS  = $(CPU_ASFLAGS) $(XASFLAGS)

# NOTE: GCCSPECS probably belongs to CPPFLAGS
GCCSPECS_OPTIMIZE_V =
GCCSPECS_DEBUG_V =

GCCSPECS = -B$(PROJECT_RELEASE)/lib/ -specs bsp_specs -qrtems 
GCCSPECS += $(GCCSPECS_$(VARIANT_V)_V)

CC  += $(GCCSPECS)
CXX += $(GCCSPECS)

CPPFLAGS += 

# Define this to yes if C++ is included in the development environment.
# This requires that at least the GNU C++ compiler and libg++ be installed.
ifeq ($(HAS_CPLUSPLUS),yes)
CPLUS_LD_LIBS += $(PROJECT_RELEASE)/lib/librtems++$(LIBSUFFIX_VA)
endif

# debug flag;
CFLAGS_DEBUG_V ?= -O0 -g
CXXFLAGS_DEBUG_V ?= $(CFLAGS_DEBUG_V)

# when debugging, optimize flag: typically empty
# some compilers do allow optimization with their "-g"
CFLAGS_OPTIMIZE_V ?= -O2 -g
CXXFLAGS_OPTIMIZE_V ?= $(CFLAGS_OPTIMIZE_V)

ifndef AUTOMAKE
CPPFLAGS_$(VARIANT)=$(CPPFLAGS_$(VARIANT)_V)
CFLAGS_$(VARIANT)  =$(CFLAGS_$(VARIANT)_V)
CXXFLAGS_$(VARIANT)=$(CXXFLAGS_$(VARIANT)_V)
endif

ifndef AUTOMAKE
CPPFLAGS += $(CPPFLAGS_OPTIMIZE) $(CPPFLAGS_DEBUG)
CFLAGS   += $(CFLAGS_OPTIMIZE) $(CFLAGS_DEBUG)
CXXFLAGS += $(CXXFLAGS_OPTIMIZE) $(CXXFLAGS_DEBUG)
endif

# List of library paths without -L
LD_PATHS= $(PROJECT_RELEASE)/lib

# ld flag for incomplete link
LDFLAGS_INCOMPLETE = -r

# LDFLAGS=$(LDFLAGS_DEBUG) $(LD_PATHS:%=-L%)
LDFLAGS += $(LDFLAGS_DEBUG)

#
# Stuff to clean and clobber for the compiler and its tools
#

CLEAN_CC = a.out *.o *.BAK
CLOBBER_CC =

#
# Client compiler and support tools
#

# CPP command to write file to standard output with warnings suppressed
CPP=$(CC) -E -w

# egrep regexp to ignore symbol table entries in ar archives.
# Only used to make sure we skip them when coalescing libraries.
# skip __.SYMDEF and empty names (maybe bug in ranlib??).
AR_SYMBOL_TABLE="HIGHLY-UNLIKELY-TO-CONFLICT"
ARFLAGS=ruv

#
# How to compile stuff into ${ARCH} subdirectory
#

${ARCH}/%.o: %.c
        ${COMPILE.c} $(AM_CPPFLAGS) $(AM_CFLAGS) -o $@ $<

${ARCH}/%.o: %.cc
        ${COMPILE.cc} $(AM_CPPFLAGS) $(AM_CXXFLAGS) -o $@ $<

${ARCH}/%.o: %.cpp
        ${COMPILE.cc} $(AM_CPPFLAGS) $(AM_CXXFLAGS) -o $@ $<

${ARCH}/%.o: %.cxx
        ${COMPILE.cc} $(AM_CPPFLAGS) $(AM_CXXFLAGS) -o $@ $<

${ARCH}/%.o: %.C
        ${COMPILE.cc} $(AM_CPPFLAGS) $(AM_CXXFLAGS) -o $@ $<

${ARCH}/%.o: %.S
        ${COMPILE.S} $(AM_CPPFLAGS) -DASM -o $@ $<

# Make foo.rel from foo.o
${ARCH}/%.rel: ${ARCH}/%.o
        ${make-rel}

# create $(ARCH)/pgm from pgm.sh
${ARCH}/%: %.sh
        $(RM) $@
        $(CP) $< $@
        $(CHMOD) +x $@

# Dependency files for use by gmake
# NOTE: we don't put them into $(ARCH)
#       so that 'make clean' doesn't blow it away

DEPEND=Depends-${ARCH}

CLEAN_DEPEND=$(DEPEND).tmp
CLOBBER_DEPEND=$(DEPEND)

# We deliberately don't have anything depend on the
# $(DEPEND) file; otherwise it will get rebuilt even
# on 'make clean'
#

depend-am: $(C_FILES) $(CC_FILES) $(S_FILES)
ifneq ($(words $(C_FILES) $(CC_FILES) $(S_FILES)), 0)
#       Use gcc -M to generate dependencies
#       Replace foo.o with $(ARCH)/foo.o
#       Replace $(ARCH) value with string $(ARCH)
#           so that it will for debug cases
        $(COMPILE.c) $(AM_CPPFLAGS) $(AM_CFLAGS) -M   $^    |  \
        $(SED) -e 's?^\(.*\)\.o[ ]*:?$$(ARCH)/\1.o:?' \
            -e 's?$(ARCH)/?$$(ARCH)/?'   >$(DEPEND).tmp
        $(MV) $(DEPEND).tmp $(DEPEND)
endif
depend: depend-am

# spell out all the LINK_FILE's, rather than using -lbsp, so
#  that $(LINK_FILES) can be a dependency

#
# NOTE: a rule to link an rtems' application should look similar to this
#       (cf. "make-exe" in make/custom/*.cfg): 
#
# gcc28:
# $(PGM): $(LINK_FILES)
#       $(CC) $(CFLAGS) -o $@ $(LINK_OBJS) $(LINK_LIBS)
#

LINK_OBJS =\
    $(CONSTRUCTOR) \
    $(OBJS)

LINK_FILES =\
    $(CONSTRUCTOR) \
    $(OBJS) \
    $(PROJECT_RELEASE)/lib/librtemsbsp$(LIBSUFFIX_VA) \
    $(PROJECT_RELEASE)/lib/librtemscpu$(LIBSUFFIX_VA)

LINK_LIBS += $(LD_LIBS)    

#
# Allow user to override link commands (to build a prom image, perhaps)
#
ifndef LINKCMDS
LINKCMDS=$(PROJECT_RELEASE)/lib/linkcmds
endif

define make-rel
        $(LINK.c) $(CFLAGS) $(AM_CFLAGS) $(AM_LDFLAGS) \
          -qnolinkcmds -nostdlib -Wl,-r $(XLDFLAGS) -o $@ $^
endef