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a10178bda1
Replace with IS_IN and IS_IN_LIB macros instead. This change results in a change in generated code, because it fixes a subtle bug. The bug was introduced when systemtap probes were added to lowlevellock.h, which resulted in stap-probe.h being included in a number of places. stap-probe.h always defines IN_LIB, which breaks a check in errno.h and netdb.h since they rely on that macro to decide whether to implement an internal version of a declaration or an external one. The components that see a code change due to this are: iconv_prog libmemusage.so libpcprofile.so libSegFault.so libutil.so.1 locale localedef nscd All other built components (i.e. libc, libpthread, etc.) remain unchanged by this on x86_64. * elf/Makefile (CPPFLAGS-.os): Remove IN_LIB. * elf/rtld-Rules (rtld-CPPFLAGS): Likewise. * extra-lib.mk (CPPFLAGS-$(lib)): Likewise. * include/libc-symbols.h (IS_IN_LIB): New macro. * include/errno.h: Use IS_IN_LIB instead of IN_LIB. * include/netdb.h: Likewise. * include/stap-probe.h: Remove all uses of IN_LIB.
110 lines
3.8 KiB
Makefile
110 lines
3.8 KiB
Makefile
# This file is included several times in a row, once
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# for each element of $(extra-libs). $(extra-libs-left)
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# is initialized first to $(extra-libs) so that with each
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# inclusion, we advance $(lib) to the next library name (e.g. libfoo).
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# The variable $($(lib)-routines) defines the list of modules
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# to be included in that library. A sysdep Makefile can add to
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# $(lib)-sysdep_routines to include additional modules.
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lib := $(firstword $(extra-libs-left))
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extra-libs-left := $(filter-out $(lib),$(extra-libs-left))
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object-suffixes-$(lib) := $(filter-out $($(lib)-inhibit-o),$(object-suffixes))
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ifneq (,$($(lib)-static-only-routines))
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ifneq (,$(filter yes%,$(build-shared)$($(lib).so-version)))
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object-suffixes-$(lib) += $(filter-out $($(lib)-inhibit-o),.oS)
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endif
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endif
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ifneq (,$(object-suffixes-$(lib)))
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# Make sure these are simply-expanded variables before we append to them,
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# since we want the expressions we append to be expanded right now.
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install-lib := $(install-lib)
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extra-objs := $(extra-objs)
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# The modules that go in $(lib).
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all-$(lib)-routines := $($(lib)-routines) $($(lib)-sysdep_routines)
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# Add each flavor of library to the lists of things to build and install.
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install-lib += $(foreach o,$(object-suffixes-$(lib)),$(lib:lib%=$(libtype$o)))
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extra-objs += $(foreach o,$(filter-out .os .oS,$(object-suffixes-$(lib))),\
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$(patsubst %,%$o,$(filter-out \
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$($(lib)-shared-only-routines),\
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$(all-$(lib)-routines))))
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ifneq (,$(filter .os,$(object-suffixes-$(lib))))
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extra-objs += $(patsubst %,%.os,$(filter-out $($(lib)-static-only-routines),\
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$(all-$(lib)-routines)))
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endif
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ifneq (,$(filter .oS,$(object-suffixes-$(lib))))
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extra-objs += $(patsubst %,%.oS,$(filter $($(lib)-static-only-routines),\
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$(all-$(lib)-routines)))
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endif
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alltypes-$(lib) := $(foreach o,$(object-suffixes-$(lib)),\
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$(objpfx)$(patsubst %,$(libtype$o),\
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$(lib:lib%=%)))
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ifeq (,$(filter $(lib),$(extra-libs-others)))
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lib-noranlib: $(alltypes-$(lib))
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ifeq (yes,$(build-shared))
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lib-noranlib: $(objpfx)$(lib).so$($(lib).so-version)
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endif
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else
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others: $(alltypes-$(lib))
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endif
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# The linked shared library is never a dependent of lib-noranlib,
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# because linking it will depend on libc.so already being built.
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ifneq (,$(filter .os,$(object-suffixes-$(lib))))
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others: $(objpfx)$(lib).so$($(lib).so-version)
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endif
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# Use o-iterator.mk to generate a rule for each flavor of library.
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ifneq (,$(filter-out .os .oS,$(object-suffixes-$(lib))))
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define o-iterator-doit
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$(objpfx)$(patsubst %,$(libtype$o),$(lib:lib%=%)): \
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$(patsubst %,$(objpfx)%$o,\
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$(filter-out $($(lib)-shared-only-routines),\
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$(all-$(lib)-routines))); \
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$$(build-extra-lib)
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endef
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object-suffixes-left = $(filter-out .os .oS,$(object-suffixes-$(lib)))
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include $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
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endif
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ifneq (,$(filter .os,$(object-suffixes-$(lib))))
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$(objpfx)$(patsubst %,$(libtype.os),$(lib:lib%=%)): \
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$(patsubst %,$(objpfx)%.os,\
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$(filter-out $($(lib)-static-only-routines),\
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$(all-$(lib)-routines)))
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$(build-extra-lib)
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endif
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ifneq (,$(filter .oS,$(object-suffixes-$(lib))))
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$(objpfx)$(patsubst %,$(libtype.oS),$(lib:lib%=%)): \
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$(patsubst %,$(objpfx)%.oS,\
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$(filter $($(lib)-static-only-routines),\
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$(all-$(lib)-routines)))
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$(build-extra-lib)
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endif
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ifeq ($(build-shared),yes)
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# Add the version script to the dependencies of the shared library.
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$(objpfx)$(lib).so: $(firstword $($(lib)-map) \
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$(addprefix $(common-objpfx), \
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$(filter $(lib).map, \
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$(version-maps))))
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endif
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endif
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# This will define `libof-ROUTINE := LIB' for each of the routines.
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cpp-srcs-left := $($(lib)-routines) $($(lib)-sysdep_routines)
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ifneq (,$(cpp-srcs-left))
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include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
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endif
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CPPFLAGS-$(lib) := -DNOT_IN_libc=1 -DIS_IN_$(lib)=1
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