diff options
Diffstat (limited to 'Makerules')
| -rw-r--r-- | Makerules | 40 |
1 files changed, 32 insertions, 8 deletions
@@ -432,13 +432,33 @@ map-file = $(firstword $($(@F:.so=-map)) \ load-map-file = $(map-file:%=-Wl,--version-script=%) endif +# Compiler arguments to use to link a shared object with libc and +# ld.so. This is intended to be as similar as possible to a default +# link with an installed libc. +link-libc-args = -Wl,--start-group \ + $(libc-for-link) \ + $(common-objpfx)libc_nonshared.a \ + $(as-needed) $(elfobjdir)/ld.so $(no-as-needed) \ + -Wl,--end-group + +# The corresponding shared libc to use. This may be modified for a +# particular target. +libc-for-link = $(common-objpfx)libc.so + +# The corresponding dependencies. As these are used in dependencies, +# not just commands, they cannot use target-specific variables so need +# to name both possible libc.so objects. +link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \ + $(common-objpfx)libc_nonshared.a $(elfobjdir)/ld.so + # Pattern rule to build a shared object from an archive of PIC objects. # This must come after the installation rules so Make doesn't try to # build shared libraries in place from the installed *_pic.a files. # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies -# on other shared objects. -lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(+interp) - $(build-shlib) +# on other shared objects. The linking with libc and ld.so is intended +# to be as similar as possible to a default link with an installed libc. +lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(+interp) $(link-libc-deps) + $(build-shlib) $(link-libc-args) define build-shlib-helper $(LINK.o) -shared $(static-libgcc) -Wl,-O1 $(sysdep-LDFLAGS) \ @@ -513,17 +533,19 @@ endef # not for shared objects define build-module $(build-module-helper) -o $@ $(shlib-lds-flags) \ - $(csu-objpfx)abi-note.o $(build-module-objlist) + $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args) endef define build-module-asneeded $(build-module-helper) -o $@ $(shlib-lds-flags) \ $(csu-objpfx)abi-note.o \ - -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed + -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \ + $(link-libc-args) endef build-module-helper-objlist = \ $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\ - $(filter-out %.lds $(map-file) $(+preinit) $(+postinit),$^)) + $(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \ + $(link-libc-deps),$^)) build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so) build-shlib-objlist = $(build-module-helper-objlist) \ @@ -566,6 +588,9 @@ generated += libc_pic.opts libc_pic.os.clean libc_pic_clean := .clean endif +# Do not filter ld.so out of libc.so link. +$(common-objpfx)libc.so: link-libc-deps = # empty + # Use our own special initializer and finalizer files for libc.so. $(common-objpfx)libc.so: $(elfobjdir)/soinit.os \ $(common-objpfx)libc_pic.os$(libc_pic_clean) \ @@ -621,8 +646,7 @@ include $(patsubst %,$(..)extra-modules.mk,$(modules-names)) extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names)) $(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \ - $(objpfx)%.os $(shlib-lds) \ - $(common-objpfx)libc.so $(common-objpfx)libc_nonshared.a + $(objpfx)%.os $(shlib-lds) $(link-libs-deps) $(build-module) endif |