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asterisk/Makefile.rules
Diederik de Groot f70f2c6252 Update configure.ac/Makefile for clang 
Created autoconf/ast_check_raii.m4: contains AST_CHECK_RAII which
checks compiler requirements for RAII:
gcc: -fnested-functions support
clang: -fblocks (and if required -lBlocksRuntime)
The original check was implemented in configure.ac and now has it's
own file. This function also sets C_COMPILER_FAMILY to either gcc or
clang for use by makefile

Created autoconf/ast_check_strsep_array_bounds.m4 (contains
AST_CHECK_STRSEP_ARRAY_BOUNDS):
which checks if clang is able to handle the optimized strsep & strcmp
functions (linux). If not, the standard libc implementation should be
used instead. Clang + the optimized macro's work with:
strsep(char *, char []), but not with strsepo(char *, char *).
Instead of replacing all the occurences throughout the source code,
not using the optimized macro version seemed easier

See 'define __strcmp_gc(s1, s2, l2) in bits/string2.h':
llvm-comment: Normally, this array-bounds warning are suppressed for
macros, so that unused paths like the one that accesses __s1[3] are
not warned about.  But if you preprocess manually, and feed the
result to another instance of clang, it will warn about all the
possible forks of this particular if statement. Instead of switching
of this optimization, another solution would be to run the preproces-
sing step with -frewrite-includes, which should preserve enough
information so that clang should still be able to suppress the diag-
nostic at the compile step later on.

See also "https://llvm.org/bugs/show_bug.cgi?id=20144"
See also "https://llvm.org/bugs/show_bug.cgi?id=11536"

Makefile.rules: If C_COMPILER_FAMILY=clang then add two warning
suppressions:
-Wno-unused-value
-Wno-parentheses-equality
In an earlier review (reviewboard: 4550 and 4554), they were deemed a
nuisace and less than benefitial.

configure.ac:
Added AST_CHECK_RAII() see earlier
Added AST_CHECK_STRSEP_ARRAY_BOUNDS() see earlier
Removed moved content

ASTERISK-24917
Change-Id: I12ea29d3bda2254ad3908e279b7effbbac6a97cb
(cherry picked from commit 9c3ed42875)
2015-05-03 10:03:08 -05:00

179 lines
5.8 KiB
Makefile
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#
# Asterisk -- A telephony toolkit for Linux.
#
# Makefile rules
#
# Copyright (C) 2006-2010, 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?=-O3
ifneq ($(findstring darwin,$(OSARCH)),)
ifeq ($(shell if test `/usr/bin/sw_vers -productVersion | cut -c4` -gt 5; then echo 6; else echo 0; fi),6)
# Snow Leopard/Lion has an issue with this optimization flag on large files (like chan_sip)
OPTIMIZE+=-fno-inline-functions
endif
endif
ifeq ($(findstring DONT_OPTIMIZE,$(MENUSELECT_CFLAGS))$(AST_CODE_COVERAGE),no)
_ASTCFLAGS+=$(OPTIMIZE)
else
_ASTCFLAGS+=-O0
endif
ifeq ($(AST_CODE_COVERAGE),yes)
_ASTCFLAGS_COVERAGE=-ftest-coverage -fprofile-arcs
_ASTLDFLAGS+=-ftest-coverage -fprofile-arcs
else
_ASTCFLAGS_COVERAGE=
endif
ifeq ($(findstring $(CONFIG_CFLAGS),$(_ASTCFLAGS)),)
_ASTCFLAGS+=$(CONFIG_CFLAGS)
endif
# shortcuts for common combinations of flags; these must be recursively expanded so that
# per-target settings will be applied
CC_CFLAGS=$(PTHREAD_CFLAGS) $(_ASTCFLAGS) $(ASTCFLAGS)
CXX_CFLAGS=$(PTHREAD_CFLAGS) $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations $(AST_DECLARATION_AFTER_STATEMENT),$(_ASTCFLAGS) $(ASTCFLAGS))
# Clang -Werror warning suppressions
ifeq ($(C_COMPILER_FAMILY),clang)
CC_CFLAGS+=-Wno-unused-value -Wno-parentheses-equality
endif
ifeq ($(GNU_LD),1)
SO_SUPPRESS_SYMBOLS=-Wl,--version-script,$(subst .so,.exports,$@),--warn-common
ifneq ($(wildcard $(subst .so,.dynamics,$@)),)
SO_SUPPRESS_SYMBOLS+=-Wl,--dynamic-list,$(subst .so,.dynamics,$@)
endif
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
else
_ASTCFLAGS+=$(AST_FORTIFY_SOURCE)
endif
ifeq ($(findstring BUILD_NATIVE,$(MENUSELECT_CFLAGS)),BUILD_NATIVE)
_ASTCFLAGS+=-march=native
endif
%.o: %.s
$(ECHO_PREFIX) echo " [AS] $< -> $@"
ifeq ($(COMPILE_DOUBLE),yes)
$(CMD_PREFIX) $(CC) -o /dev/null -c $< $(CC_CFLAGS) $(OPTIMIZE)
endif
$(CMD_PREFIX) $(CC) -o $@ -c $< $(CC_CFLAGS) $(_ASTCFLAGS_COVERAGE)
%.o: %.i
$(ECHO_PREFIX) echo " [CCi] $< -> $@"
ifneq ($(AST_CLANG_BLOCKS),)
ifeq ($(COMPILE_DOUBLE),yes)
$(CMD_PREFIX) $(CC) -o /dev/null -c $< $(CC_CFLAGS) $(OPTIMIZE) -Wno-unused-command-line-argument
endif
$(CMD_PREFIX) $(CC) -o $@ -c $< $(CC_CFLAGS) $(_ASTCFLAGS_COVERAGE) -Wno-unused-command-line-argument
else
ifeq ($(COMPILE_DOUBLE),yes)
$(CMD_PREFIX) $(CC) -o /dev/null -c $< $(CC_CFLAGS) $(OPTIMIZE)
endif
$(CMD_PREFIX) $(CC) -o $@ -c $< $(CC_CFLAGS) $(_ASTCFLAGS_COVERAGE)
endif
ifneq ($(COMPILE_DOUBLE),yes)
%.o: %.c
$(ECHO_PREFIX) echo " [CC] $< -> $@"
$(CMD_PREFIX) $(CC) -o $@ -c $< $(MAKE_DEPS) $(CC_CFLAGS) $(_ASTCFLAGS_COVERAGE)
endif
%.i: %.c
$(ECHO_PREFIX) echo " [CPP] $< -> $@"
$(CMD_PREFIX) $(CC) -o $@ -E $< $(MAKE_DEPS) $(CC_CFLAGS) $(_ASTCFLAGS_COVERAGE)
%.oo: %.ii
$(ECHO_PREFIX) echo " [CXXi] $< -> $@"
ifeq ($(COMPILE_DOUBLE),yes)
$(CMD_PREFIX) $(CXX) -o /dev/null -c $< $(CXX_CFLAGS) $(OPTIMIZE)
endif
$(CMD_PREFIX) $(CXX) -o $@ -c $< $(CXX_CFLAGS) $(_ASTCFLAGS_COVERAGE)
ifneq ($(COMPILE_DOUBLE),yes)
%.oo: %.cc
$(ECHO_PREFIX) echo " [CXX] $< -> $@"
$(CMD_PREFIX) $(CXX) -o $@ -c $< $(MAKE_DEPS) $(CXX_CFLAGS) $(_ASTCFLAGS_COVERAGE)
endif
%.ii: %.cc
$(ECHO_PREFIX) echo " [CPP] $< -> $@"
$(CMD_PREFIX) $(CXX) -o $@ -E $< $(MAKE_DEPS) $(CXX_CFLAGS) $(_ASTCFLAGS_COVERAGE)
%.so: %.o
ifeq ($(GNU_LD),1)
$(CMD_PREFIX) $(ASTTOPDIR)/build_tools/make_linker_version_script $* "$(LINKER_SYMBOL_PREFIX)" "$(ASTTOPDIR)"
endif
$(ECHO_PREFIX) echo " [LD] $^ -> $@"
$(CMD_PREFIX) $(CC) $(STATIC_BUILD) -o $@ $(CC_LDFLAGS_SO) $^ $(CC_LIBS)
%.so: %.oo
ifeq ($(GNU_LD),1)
$(CMD_PREFIX) $(ASTTOPDIR)/build_tools/make_linker_version_script $* "$(LINKER_SYMBOL_PREFIX)" "$(ASTTOPDIR)"
endif
$(ECHO_PREFIX) echo " [LDXX] $^ -> $@"
$(CMD_PREFIX) $(CXX) $(STATIC_BUILD) -o $@ $(CXX_LDFLAGS_SO) $^ $(CXX_LIBS)
%.eo: %.o
$(ECHO_PREFIX) echo " [EMBED] $< -> $@"
$(CMD_PREFIX) $(ASTTOPDIR)/build_tools/make_linker_eo_script $* > .$@.ld
$(CMD_PREFIX) $(LD) -r -T .$@.ld -o $@ $<
$(CMD_PREFIX) rm -f .$@.ld
%.eo: %.oo
$(ECHO_PREFIX) echo " [EMBED] $< -> $@"
$(CMD_PREFIX) $(ASTTOPDIR)/build_tools/make_linker_eo_script $* > .$@.ld
$(CMD_PREFIX) $(LD) -r -T .$@.ld -o $@ $<
$(CMD_PREFIX) rm -f .$@.ld
%: %.o
$(ECHO_PREFIX) echo " [LD] $^ -> $@"
$(CMD_PREFIX) $(CXX) $(STATIC_BUILD) -o $@ $(PTHREAD_CFLAGS) $(_ASTLDFLAGS) $^ $(CXX_LIBS) $(ASTLDFLAGS)
dist-clean:: clean
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