2be88e05c0
Some platforms prefix externally-visible symbols in object files generated from C sources (most commonly, '_' is the prefix). On these platforms, the existing symbol export filtering process ends up suppressing all the symbols that are supposed to be left visible. This patch allows the prefix string to be supplied to the top-level Makefile in the LINKER_SYMBOL_PREFIX variable, and then generates the linker scripts as required to include the prefix supplied. git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@255906 65c4cc65-6c06-0410-ace0-fbb531ad65f3
167 lines
5.8 KiB
Makefile
167 lines
5.8 KiB
Makefile
#
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# Asterisk -- A telephony toolkit for Linux.
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#
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# Makefile rules for subdirectories containing modules
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#
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# Copyright (C) 2006, Digium, Inc.
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#
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# Kevin P. Fleming <kpfleming@digium.com>
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#
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# This program is free software, distributed under the terms of
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# the GNU General Public License
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#
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# Makefile rules for building modules.
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# In most cases, we set target-specific variables for certain targets
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# (remember that they apply recursively to prerequisites).
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# Also note that we can only set one variable per rule, so we have to
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# repeat the left hand side to set multiple variables.
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ifeq ($(findstring LOADABLE_MODULES,$(MENUSELECT_CFLAGS)),)
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_ASTCFLAGS+=${GC_CFLAGS}
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endif
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ifneq ($(findstring STATIC_BUILD,$(MENUSELECT_CFLAGS)),)
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STATIC_BUILD=-static
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endif
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include $(ASTTOPDIR)/Makefile.rules
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# If MODULE_PREFIX is defined, use it to run the standard functions to set
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# C_MODS, CC_MODS, LOADABLE_MODS and EMBEDDED_MODS.
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# Each word of MODULE_PREFIX is a prefix for filenames that we consider
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# valid C or CC modules (eg. app, func ...). Note that the underscore
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# is added here, and does not need to be in MODULE_PREFIX
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#
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# Use MODULE_EXCLUDE to specify additional modules to exclude.
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ifneq ($(MODULE_PREFIX),)
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ALL_C_MODS:=
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ALL_CC_MODS:=
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ALL_C_MODS+=$(foreach p,$(MODULE_PREFIX),$(patsubst %.c,%,$(wildcard $(p)_*.c)))
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ALL_CC_MODS+=$(foreach p,$(MODULE_PREFIX),$(patsubst %.cc,%,$(wildcard $(p)_*.cc)))
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endif
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C_MODS:=$(filter-out $(MENUSELECT_$(MENUSELECT_CATEGORY)),$(ALL_C_MODS))
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CC_MODS:=$(filter-out $(MENUSELECT_$(MENUSELECT_CATEGORY)),$(ALL_CC_MODS))
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ifneq ($(findstring $(MENUSELECT_CATEGORY),$(MENUSELECT_EMBED)),)
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EMBEDDED_MODS:=$(C_MODS) $(CC_MODS)
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else
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LOADABLE_MODS:=$(C_MODS) $(CC_MODS)
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endif
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# Both C++ and C++ sources need their module name in AST_MODULE
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# We also pass whatever _INCLUDE list is generated by menuselect
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# (they are stored in file 'makeopts'). This is also necessary
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# for components used to build modules, which can't be determined
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# by the rules in this file, so the MOD_ASTCFLAGS definition
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# is used to collect the required flags for a module... which can
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# then be used any place they are required.
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MOD_ASTCFLAGS=-DAST_MODULE=\"$(1)\" $(MENUSELECT_OPTS_$(1):%=-D%) $(foreach dep,$(MENUSELECT_DEPENDS_$(1)),$(value $(dep)_INCLUDE))
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$(addsuffix .oo,$(CC_MODS)) $(addsuffix .o,$(C_MODS)): \
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_ASTCFLAGS+=$(call MOD_ASTCFLAGS,$*)
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ifeq ($(findstring $(OSARCH), mingw32 cygwin ),)
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# don't define -fPIC on mingw32 and cygwin, it is the default
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$(LOADABLE_MODS:%=%.so): _ASTCFLAGS+=-fPIC
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endif
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# For loadable modules, pass _LIB and _LDFLAGS from menuselect.
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$(LOADABLE_MODS:%=%.so): LIBS+=$(foreach dep,$(MENUSELECT_DEPENDS_$*),$(value $(dep)_LIB))
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$(LOADABLE_MODS:%=%.so): _ASTLDFLAGS+=$(foreach dep,$(MENUSELECT_DEPENDS_$*),$(value $(dep)_LDFLAGS))
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$(EMBEDDED_MODS:%=%.o): _ASTCFLAGS+=-DEMBEDDED_MODULE=$*
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$(addsuffix .so,$(filter $(LOADABLE_MODS),$(C_MODS))): %.so: %.o
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$(addsuffix .so,$(filter $(LOADABLE_MODS),$(CC_MODS))): %.so: %.oo
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modules.link: $(addsuffix .eo,$(filter $(EMBEDDED_MODS),$(C_MODS)))
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.PHONY: clean uninstall _all moduleinfo makeopts
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ifneq ($(LOADABLE_MODS),)
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_all: $(LOADABLE_MODS:%=%.so)
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ifneq ($(findstring $(OSARCH), mingw32 cygwin ),)
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# linker options and extra libraries for cygwin
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SOLINK=-Wl,--out-implib=lib$@.a -shared
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LIBS+=-L$(ASTTOPDIR)/main -lasterisk -L$(ASTTOPDIR)/res $($@_LIBS)
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# additional libraries in res/
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endif
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endif
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ifneq ($(EMBEDDED_MODS),)
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_all: modules.link
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__embed_ldscript:
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@echo "../$(SUBDIR)/modules.link"
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__embed_ldflags:
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@echo "$(foreach mod,$(filter $(EMBEDDED_MODS),$(C_MODS)),$(foreach dep,$(MENUSELECT_DEPENDS_$(mod)),$(dep)_LDFLAGS))"
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@echo "$(foreach mod,$(filter $(EMBEDDED_MODS),$(CC_MODS)),$(foreach dep,$(MENUSELECT_DEPENDS_$(mod)),$(dep)_LDFLAGS))"
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__embed_libs:
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@echo "$(foreach mod,$(filter $(EMBEDDED_MODS),$(C_MODS)),$(foreach dep,$(MENUSELECT_DEPENDS_$(mod)),$(dep)_LIB))"
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@echo "$(foreach mod,$(filter $(EMBEDDED_MODS),$(CC_MODS)),$(foreach dep,$(MENUSELECT_DEPENDS_$(mod)),$(dep)_LIB))"
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else
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__embed_ldscript:
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__embed_ldflags:
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__embed_libs:
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endif
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modules.link:
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@rm -f $@
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@for file in $(patsubst %,$(SUBDIR)/%,$(filter %.eo,$^)); do echo "INPUT (../$${file})" >> $@; done
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@for file in $(patsubst %,$(SUBDIR)/%,$(filter-out %.eo,$^)); do echo "INPUT (../$${file})" >> $@; done
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clean::
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rm -f *.so *.o *.oo *.eo *.i *.ii
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rm -f .*.d
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rm -f *.s *.i
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rm -f modules.link
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install:: all
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@echo "Installing modules from `basename $(CURDIR)`..."
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@for x in $(LOADABLE_MODS:%=%.so); do $(INSTALL) -m 755 $$x $(DESTDIR)$(MODULES_DIR) ; done
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uninstall::
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dist-clean::
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rm -f .*.moduleinfo .moduleinfo
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rm -f .*.makeopts .makeopts
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rm -f *.exports
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.%.moduleinfo: %.c
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@echo "<member name=\"$*\" displayname=\"$(shell $(GREP) -e AST_MODULE_INFO $< | head -n 1 | cut -d '"' -f 2)\" remove_on_change=\"$(SUBDIR)/$*.o $(SUBDIR)/$*.so\">" > $@
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$(AWK) -f $(ASTTOPDIR)/build_tools/get_moduleinfo $< >> $@
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echo "</member>" >> $@
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.%.moduleinfo: %.cc
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@echo "<member name=\"$*\" displayname=\"$(shell $(GREP) -e AST_MODULE_INFO $< | head -n 1 | cut -d '"' -f 2)\" remove_on_change=\"$(SUBDIR)/$*.oo $(SUBDIR)/$*.so\">" > $@
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$(AWK) -f $(ASTTOPDIR)/build_tools/get_moduleinfo $< >> $@
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echo "</member>" >> $@
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.moduleinfo:: $(addsuffix .moduleinfo,$(addprefix .,$(ALL_C_MODS) $(ALL_CC_MODS)))
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@echo "<category name=\"MENUSELECT_$(MENUSELECT_CATEGORY)\" displayname=\"$(MENUSELECT_DESCRIPTION)\" remove_on_change=\"$(SUBDIR)/modules.link\">" > $@
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@cat $^ >> $@
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@echo "</category>" >> $@
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moduleinfo: .moduleinfo
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@cat $<
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.%.makeopts: %.c
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@$(AWK) -f $(ASTTOPDIR)/build_tools/get_makeopts $< > $@
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.%.makeopts: %.cc
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@$(AWK) -f $(ASTTOPDIR)/build_tools/get_makeopts $< > $@
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.makeopts:: $(addsuffix .makeopts,$(addprefix .,$(ALL_C_MODS) $(ALL_CC_MODS)))
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@cat $^ > $@
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makeopts: .makeopts
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@cat $<
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ifneq ($(wildcard .*.d),)
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include .*.d
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endif
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