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https://sourceware.org/git/glibc.git
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Remove --with-default-link configure option
Now that there is no need to use a special linker script to hardening internal data structures, remove the --with-default-link configure option and associated definitions. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
parent
3020f72618
commit
91fc5b9990
6
INSTALL
6
INSTALL
@ -90,12 +90,6 @@ if 'CFLAGS' is specified it must enable optimization. For example:
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library will still be usable, but functionality may be lost--for
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example, you can't build a shared libc with old binutils.
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'--with-default-link'
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With '--with-default-link', the build system does not use a custom
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linker script for linking shared objects. The default is
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'--without-default-link', because the custom linker script is
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needed for full RELRO protection.
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'--with-nonshared-cflags=CFLAGS'
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Use additional compiler flags CFLAGS to build the parts of the
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library which are always statically linked into applications and
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21
Makerules
21
Makerules
@ -544,13 +544,8 @@ $(LINK.o) -shared -static-libgcc -Wl,-O1 $(sysdep-LDFLAGS) \
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-L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
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endef
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# If the linker is good enough, we can let it use its default linker script.
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# In the long term the custom linker script will be removed.
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shlib-lds =
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shlib-lds-flags =
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define build-shlib
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$(build-shlib-helper) -o $@ $(shlib-lds-flags) \
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$(build-shlib-helper) -o $@ \
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$(csu-objpfx)abi-note.o $(build-shlib-objlist)
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endef
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@ -569,12 +564,12 @@ endef
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# binutils only position loadable notes into the first page for binaries,
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# not for shared objects
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define build-module
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$(build-module-helper) -o $@ $(shlib-lds-flags) \
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$(build-module-helper) -o $@ \
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$(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args)
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$(call after-link,$@)
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endef
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define build-module-asneeded
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$(build-module-helper) -o $@ $(shlib-lds-flags) \
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$(build-module-helper) -o $@ \
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$(csu-objpfx)abi-note.o \
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-Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \
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$(link-libc-args)
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@ -606,7 +601,6 @@ $(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
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$(LINK.o) -nostdlib -nostartfiles -r -o $@ \
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$(LDFLAGS-c_pic.os) $(whole-archive) $^ -o $@
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ifeq (,$(strip $(shlib-lds-flags)))
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# Generate a list of -R options to excise .gnu.glibc-stub.* sections.
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$(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
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$(OBJDUMP) -h $< | \
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@ -620,7 +614,6 @@ $(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
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generated += libc_pic.opts libc_pic.os.clean
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libc_pic_clean := .clean
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endif
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# Build a possibly-modified version of libc_pic.a for use in building
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# linkobj/libc.so.
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@ -650,16 +643,14 @@ $(common-objpfx)linkobj/libc.so: link-libc-deps = # empty
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$(common-objpfx)libc.so: $(common-objpfx)libc_pic.os$(libc_pic_clean) \
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$(elf-objpfx)sofini.os \
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$(elf-objpfx)interp.os \
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$(elf-objpfx)ld.so \
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$(shlib-lds)
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$(elf-objpfx)ld.so
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$(build-shlib)
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$(call after-link,$@)
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$(common-objpfx)linkobj/libc.so: $(common-objpfx)linkobj/libc_pic.a \
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$(elf-objpfx)sofini.os \
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$(elf-objpfx)interp.os \
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$(elf-objpfx)ld.so \
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$(shlib-lds)
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$(elf-objpfx)ld.so
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$(build-shlib)
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$(call after-link,$@)
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@ -720,7 +711,7 @@ endif
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extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
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$(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
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$(objpfx)%.os $(shlib-lds) $(link-libs-deps)
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$(objpfx)%.os $(link-libs-deps)
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$(build-module)
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endif
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@ -69,7 +69,6 @@ have-libaudit = @have_libaudit@
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have-libcap = @have_libcap@
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have-cc-with-libunwind = @libc_cv_cc_with_libunwind@
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bind-now = @bindnow@
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use-default-link = @use_default_link@
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have-cxx-thread_local = @libc_cv_cxx_thread_local@
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have-loop-to-function = @libc_cv_cc_loop_to_function@
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have-textrel_ifunc = @libc_cv_textrel_ifunc@
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13
configure
vendored
13
configure
vendored
@ -680,7 +680,6 @@ hardcoded_path_in_tests
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enable_timezone_tools
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rtld_early_cflags
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extra_nonshared_cflags
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use_default_link
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sysheaders
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ac_ct_CXX
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CXXFLAGS
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@ -756,7 +755,6 @@ with_gd_lib
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with_binutils
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with_selinux
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with_headers
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with_default_link
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with_nonshared_cflags
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with_rtld_early_cflags
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with_timeoutfactor
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@ -1475,7 +1473,6 @@ Optional Packages:
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--with-selinux if building with SELinux support
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--with-headers=PATH location of system headers to use (for example
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/usr/src/linux/include) [default=compiler default]
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--with-default-link do not use explicit linker scripts
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--with-nonshared-cflags=CFLAGS
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build nonshared libraries with additional CFLAGS
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--with-rtld-early-cflags=CFLAGS
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@ -3275,16 +3272,6 @@ fi
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# Check whether --with-default-link was given.
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if test "${with_default_link+set}" = set; then :
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withval=$with_default_link; use_default_link=$withval
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else
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use_default_link=no
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fi
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# Check whether --with-nonshared-cflags was given.
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if test "${with_nonshared_cflags+set}" = set; then :
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withval=$with_nonshared_cflags; extra_nonshared_cflags=$withval
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@ -147,13 +147,6 @@ AC_ARG_WITH([headers],
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[sysheaders=''])
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AC_SUBST(sysheaders)
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AC_SUBST(use_default_link)
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AC_ARG_WITH([default-link],
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AS_HELP_STRING([--with-default-link],
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[do not use explicit linker scripts]),
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[use_default_link=$withval],
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[use_default_link=no])
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dnl Additional build flags injection.
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AC_ARG_WITH([nonshared-cflags],
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AS_HELP_STRING([--with-nonshared-cflags=CFLAGS],
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@ -1242,8 +1242,6 @@ endif
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# Command to link into a larger single relocatable object.
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reloc-link = $(LINK.o) -nostdlib -nostartfiles -r
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$(objpfx)sotruss-lib.so: $(shlib-lds)
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$(objpfx)dl-allobjs.os: $(all-rtld-routines:%=$(objpfx)%.os)
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$(reloc-link) -o $@ $^
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@ -4,7 +4,7 @@ extra-modules-left := $(strip $(filter-out $(mod),$(extra-modules-left)))
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extra-objs := $(extra-objs) $(patsubst %,%.os,$($(mod)-routines))
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$(objpfx)$(mod).so: $(addprefix $(objpfx),$(addsuffix .os,$($(mod)-routines)))\
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$(shlib-lds) $(link-libc-deps)
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$(link-libc-deps)
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$(build-module-asneeded)
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ifneq (,$(extra-modules-left))
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@ -117,12 +117,6 @@ problem and suppress these constructs, so that the library will still be
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usable, but functionality may be lost---for example, you can't build a
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shared libc with old binutils.
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@item --with-default-link
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With @code{--with-default-link}, the build system does not use a custom
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linker script for linking shared objects. The default is
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@code{--without-default-link}, because the custom linker script is
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needed for full RELRO protection.
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@item --with-nonshared-cflags=@var{cflags}
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Use additional compiler flags @var{cflags} to build the parts of the
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library which are always statically linked into applications and
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