diff options
| -rw-r--r-- | INSTALL | 10 | ||||
| -rw-r--r-- | Makefile | 4 | ||||
| -rw-r--r-- | Makerules | 26 | ||||
| -rw-r--r-- | config.make.in | 1 | ||||
| -rwxr-xr-x | configure | 15 | ||||
| -rw-r--r-- | configure.ac | 7 | ||||
| -rw-r--r-- | elf/Makefile | 8 | ||||
| -rw-r--r-- | manual/install.texi | 9 |
8 files changed, 77 insertions, 3 deletions
@@ -181,6 +181,16 @@ if 'CFLAGS' is specified it must enable optimization. For example: RELRO and a read-only global offset table (GOT), at the cost of slightly increased program load times. +'--disable-major-minor-libraries' + Do not install shared objects under file names that contain the + major and minor version of the GNU C Library. By default, such + names are used, and the names defined by the ABI are provided as + symbolic links only. This causes problems with certain package + managers during library upgrades and (in particular) downgrades, so + this option can be used to install these shared objects directly + under their ABI-defined names, without an additional indirection + via symbolic links. + '--enable-pt_chown' The file 'pt_chown' is a helper binary for 'grantpt' (*note Pseudo-Terminals: Allocation.) that is installed setuid root to fix @@ -112,7 +112,9 @@ ifeq (yes,$(build-shared)) install: install-symbolic-link .PHONY: install-symbolic-link install-symbolic-link: subdir_install - $(symbolic-link-prog) $(symbolic-link-list) + if test -e $(symbolic-link-list) ; then \ + $(symbolic-link-prog) $(symbolic-link-list); \ + fi rm -f $(symbolic-link-list) install: @@ -991,6 +991,14 @@ versioned := $(strip $(foreach so,$(install-lib.so),\ install-lib.so-versioned := $(filter $(versioned), $(install-lib.so)) install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so)) +# $(install-major-minor-libraries) is used within install-lib-nosubdir +# to trigger installation of the actual implementation file. +ifeq (yes,$(major-minor-libraries)) +install-major-minor-libraries = $(inst_slibdir)/$(L:.so=)-$(version).so +else +install-major-minor-libraries = +endif + # For libraries whose soname have version numbers, we install three files: # $(inst_libdir)/libfoo.so -- for linking, symlink or ld script # $(inst_slibdir)/libfoo.so.NN -- for loading by SONAME, symlink @@ -998,7 +1006,7 @@ install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so)) install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \ $(foreach L,$(install-lib.so-versioned),\ $(inst_libdir)/$L \ - $(inst_slibdir)/$(L:.so=)-$(version).so \ + $(install-major-minor-libraries) \ $(inst_slibdir)/$L$($L-version)) # Install all the unversioned shared libraries. @@ -1051,6 +1059,7 @@ endef endif ifdef libc.so-version +ifeq (yes,$(major-minor-libraries)) # For a library specified to be version N, install three files: # libc.so -> libc.so.N (e.g. libc.so.6) # libc.so.6 -> libc-VERSION.so (e.g. libc-1.10.so) @@ -1060,6 +1069,11 @@ $(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \ $(make-shlib-link) $(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force) $(do-install-program) +else # !$(major-minor-libraries) +$(inst_slibdir)/libc.so$(libc.so-version): $(common-objpfx)libc.so $(+force) + $(do-install-program) +endif # !$(major-minor-libraries) + install: $(inst_slibdir)/libc.so$(libc.so-version) # This fragment of linker script gives the OUTPUT_FORMAT statement @@ -1134,6 +1148,7 @@ include $(o-iterator) generated += $(foreach o,$(versioned),$o$($o-version)) +ifeq (yes,$(major-minor-libraries)) define o-iterator-doit $(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \ $(+force); @@ -1148,6 +1163,15 @@ $(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force); endef object-suffixes-left := $(versioned) include $(o-iterator) + +else # !$(major-minor-libraries) +define o-iterator-doit +$(inst_slibdir)/$o$($o-version): $(objpfx)$o $(+force); + $$(do-install-program) +endef +object-suffixes-left := $(versioned) +include $(o-iterator) +endif # !$(major-minor-libraries) endif # ifneq (,$(versioned)) define do-install-so diff --git a/config.make.in b/config.make.in index 2fed3da..ad48e54 100644 --- a/config.make.in +++ b/config.make.in @@ -71,6 +71,7 @@ have-libcap = @have_libcap@ have-cc-with-libunwind = @libc_cv_cc_with_libunwind@ fno-unit-at-a-time = @fno_unit_at_a_time@ bind-now = @bindnow@ +major-minor-libraries = @major_minor_libraries@ have-hash-style = @libc_cv_hashstyle@ use-default-link = @use_default_link@ output-format = @libc_cv_output_format@ @@ -682,6 +682,7 @@ experimental_malloc enable_werror all_warnings force_install +major_minor_libraries bindnow hardcoded_path_in_tests enable_timezone_tools @@ -776,6 +777,7 @@ enable_hidden_plt enable_bind_now enable_stack_protector enable_static_nss +enable_major_minor_libraries enable_force_install enable_maintainer_mode enable_kernel @@ -1441,6 +1443,10 @@ Optional Features: Use -fstack-protector[-all|-strong] to detect glibc buffer overflows --enable-static-nss build static NSS modules [default=no] + --enable-major-minor-libraries + install most shared objects under names based on the + glibc version, with symbolic links to them + [default=yes] --disable-force-install don't force installation of files from this package, even if they are older than the installed files --enable-maintainer-mode @@ -3463,6 +3469,15 @@ if test x"$static_nss" = xyes || test x"$shared" = xno; then fi +# Check whether --enable-major-minor-libraries was given. +if test "${enable_major_minor_libraries+set}" = set; then : + enableval=$enable_major_minor_libraries; major_minor_libraries=$enableval +else + major_minor_libraries=yes +fi + + + # Check whether --enable-force-install was given. if test "${enable_force_install+set}" = set; then : enableval=$enable_force_install; force_install=$enableval diff --git a/configure.ac b/configure.ac index e69c88c..c374eea 100644 --- a/configure.ac +++ b/configure.ac @@ -251,6 +251,13 @@ if test x"$static_nss" = xyes || test x"$shared" = xno; then AC_DEFINE(DO_STATIC_NSS) fi +AC_ARG_ENABLE([major-minor-libraries], + AC_HELP_STRING([--enable-major-minor-libraries], + [install most shared objects under names based on the glibc version, with symbolic links to them @<:@default=yes@:>@]), + [major_minor_libraries=$enableval], + [major_minor_libraries=yes]) +AC_SUBST(major_minor_libraries) + AC_ARG_ENABLE([force-install], AC_HELP_STRING([--disable-force-install], [don't force installation of files from this package, even if they are older than the installed files]), diff --git a/elf/Makefile b/elf/Makefile index 305bed2..e3e898b 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -553,6 +553,7 @@ $(objpfx)trusted-dirs.st: Makefile $(..)Makeconfig CPPFLAGS-dl-load.c += -I$(objpfx). -I$(csu-objpfx). ifeq (yes,$(build-shared)) +ifeq (yes,$(major-minor-libraries)) $(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so $(+force) $(make-target-directory) $(do-install-program) @@ -562,11 +563,16 @@ $(inst_rtlddir)/$(rtld-installed-name): \ $(inst_slibdir)/libc-$(version).so $(make-target-directory) $(make-shlib-link) +else # !$(major-minor-libraries) +$(inst_slibdir)/$(rtld-installed-name): $(objpfx)ld.so $(+force) + $(make-target-directory) + $(do-install-program) +endif # !$(major-minor-libraries) # Special target called by parent to install just the dynamic linker. .PHONY: ldso_install ldso_install: $(inst_rtlddir)/$(rtld-installed-name) -endif +endif # $(build-shared) ldd-rewrite = -e 's%@RTLD@%$(rtlddir)/$(rtld-installed-name)%g' \ diff --git a/manual/install.texi b/manual/install.texi index b2d569a..d98f026 100644 --- a/manual/install.texi +++ b/manual/install.texi @@ -209,6 +209,15 @@ provides additional security hardening because it enables full RELRO and a read-only global offset table (GOT), at the cost of slightly increased program load times. +@item --disable-major-minor-libraries +Do not install shared objects under file names that contain the major +and minor version of @theglibc. By default, such names are used, and +the names defined by the ABI are provided as symbolic links only. This +causes problems with certain package managers during library upgrades +and (in particular) downgrades, so this option can be used to install +these shared objects directly under their ABI-defined names, without an +additional indirection via symbolic links. + @pindex pt_chown @findex grantpt @item --enable-pt_chown |