Makefile.rules

#
# Asterisk -- A telephony toolkit for Linux.
# 
# Makefile rules
#
# Copyright (C) 2006-2008, Digium, Inc.
#
# Kevin P. Fleming <kpfleming@digium.com>
#
# This program is free software, distributed under the terms of
# the GNU General Public License
#

# Each command is preceded by a short comment on what to do.
# Prefixing one or the other with @\# or @ or nothing makes the desired
# behaviour. ECHO_PREFIX prefixes the comment, CMD_PREFIX prefixes the command.

-include $(ASTTOPDIR)/makeopts

.PHONY: dist-clean

# If 'make' decides to create intermediate files to satisfy a build requirement
# (like producing a .i from a .c), we want to keep them, so tell make to keep
# all intermediate files
.SECONDARY:

# extra cflags to build dependencies. Recursively expanded.
MAKE_DEPS=-MD -MT $@ -MF .$(subst /,_,$@).d -MP

ifeq ($(NOISY_BUILD),)
    ECHO_PREFIX=@
    CMD_PREFIX=@
else
    ECHO_PREFIX=@\# 
    CMD_PREFIX=
endif

OPTIMIZE?=-O6

ifeq ($(findstring DONT_OPTIMIZE,$(MENUSELECT_CFLAGS)),)
    _ASTCFLAGS+=$(OPTIMIZE)
else
    _ASTCFLAGS+=-O0
endif

# shortcuts for common combinations of flags; these must be recursively expanded so that
# per-target settings will be applied
CC_CFLAGS=$(PTHREAD_CFLAGS) $(_ASTCFLAGS) $(ASTCFLAGS)
CXX_CFLAGS=$(PTHREAD_CFLAGS) $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations $(AST_DECLARATION_AFTER_STATEMENT),$(_ASTCFLAGS) $(ASTCFLAGS))

ifeq ($(GNU_LD),1)
SO_SUPPRESS_SYMBOLS=-Wl,--version-script,$(if $(wildcard $(subst .so,.exports,$@)),$(subst .so,.exports,$@),$(ASTTOPDIR)/default.exports)
endif

CC_LDFLAGS_SO=$(PTHREAD_CFLAGS) $(_ASTLDFLAGS) $(SOLINK) $(SO_SUPPRESS_SYMBOLS) $(ASTLDFLAGS)
CXX_LDFLAGS_SO=$(PTHREAD_CFLAGS) $(_ASTLDFLAGS) $(SOLINK) $(SO_SUPPRESS_SYMBOLS) $(ASTLDFLAGS)
CC_LIBS=$(PTHREAD_LIBS) $(LIBS)
CXX_LIBS=$(PTHREAD_LIBS) $(LIBS)

# determine whether to double-compile so that the optimizer can report code path problems
# this is only done when developer mode and DONT_OPTIMIZE are both enabled
# in that case, we run the preprocessor to produce a .i or .ii file from the source
# code, then compile once with optimizer enabled (and the output to /dev/null),
# and if that doesn't fail then compile again with optimizer disabled
ifeq ($(findstring DONT_OPTIMIZE,$(MENUSELECT_CFLAGS))$(AST_DEVMODE),DONT_OPTIMIZEyes)
COMPILE_DOUBLE=yes
endif

%.o: %.s
	$(ECHO_PREFIX) echo "   [AS] $< -> $@"
ifeq ($(COMPILE_DOUBLE),yes)
	$(CMD_PREFIX) $(CC) -o /dev/null -c $< $(OPTIMIZE) $(CC_CFLAGS)
endif
	$(CMD_PREFIX) $(CC) -o $@ -c $< $(CC_CFLAGS)

%.o: %.i
	$(ECHO_PREFIX) echo "   [CCi] $< -> $@"
ifeq ($(COMPILE_DOUBLE),yes)
	$(CMD_PREFIX) $(CC) -o /dev/null -c $< $(OPTIMIZE) $(CC_CFLAGS)
endif
	$(CMD_PREFIX) $(CC) -o $@ -c $< $(CC_CFLAGS)

ifneq ($(COMPILE_DOUBLE),yes)
%.o: %.c
	$(ECHO_PREFIX) echo "   [CC] $< -> $@"
	$(CMD_PREFIX) $(CC) -o $@ -c $< $(MAKE_DEPS) $(CC_CFLAGS)
endif

%.i: %.c
	$(ECHO_PREFIX) echo "   [CPP] $< -> $@"
	$(CMD_PREFIX) $(CC) -o $@ -E $< $(MAKE_DEPS) $(CC_CFLAGS)

%.oo: %.ii
	$(ECHO_PREFIX) echo "   [CXXi] $< -> $@"
ifeq ($(COMPILE_DOUBLE),yes)
	$(CMD_PREFIX) $(CXX) -o /dev/null -c $< $(OPTIMIZE) $(CXX_CFLAGS)
endif
	$(CMD_PREFIX) $(CXX) -o $@ -c $< $(CXX_CFLAGS)

ifneq ($(COMPILE_DOUBLE),yes)
%.oo: %.cc
	$(ECHO_PREFIX) echo "   [CXX] $< -> $@"
	$(CMD_PREFIX) $(CXX) -o $@ -c $< $(MAKE_DEPS) $(CXX_CFLAGS)
endif

%.ii: %.cc
	$(ECHO_PREFIX) echo "   [CPP] $< -> $@"
	$(CMD_PREFIX) $(CXX) -o $@ -E $< $(MAKE_DEPS) $(CXX_CFLAGS)

%.c: %.y
	$(ECHO_PREFIX) echo "   [BISON] $< -> $@"
	$(CMD_PREFIX) bison -o $@ -d --name-prefix=ast_yy $<

%.c: %.fl
	$(ECHO_PREFIX) echo "   [FLEX] $< -> $@"
	$(CMD_PREFIX) flex -o $@ --full $<

%.so: %.o
	$(ECHO_PREFIX) echo "   [LD] $^ -> $@"
	$(CMD_PREFIX) $(CC) $(STATIC_BUILD) -o $@ $(CC_LDFLAGS_SO) $^ $(CC_LIBS)

%.so: %.oo
	$(ECHO_PREFIX) echo "   [LDXX] $^ -> $@"
	$(CMD_PREFIX) $(CXX) $(STATIC_BUILD) -o $@ $(CXX_LDFLAGS_SO) $^ $(CXX_LIBS)

%: %.o
	$(ECHO_PREFIX) echo "   [LD] $^ -> $@"
	$(CMD_PREFIX) $(CXX) $(STATIC_BUILD) -o $@ $(PTHREAD_CFLAGS) $(_ASTLDFLAGS) $^ $(CXX_LIBS) $(ASTLDFLAGS)

dist-clean:: clean