Link them all with -z,defs,-z,relro,--no-undefined, provide complete dependencies for the link steps, and add libeu.a to each one. libeu.a contains useful library functionality that each of them might use. The linker will strip unneeded symbols, so linking it in won't hurt even if none of the functions are used.
Signed-off-by: Ulf Hermann <ulf.herm...@qt.io> --- backends/Makefile.am | 7 ++++--- libasm/Makefile.am | 14 ++++++++------ libdw/Makefile.am | 15 +++++++++------ libelf/Makefile.am | 14 +++++++++----- 4 files changed, 30 insertions(+), 20 deletions(-) diff --git a/backends/Makefile.am b/backends/Makefile.am index bfb6b84..79bd26c 100644 --- a/backends/Makefile.am +++ b/backends/Makefile.am @@ -45,6 +45,7 @@ noinst_DATA = $(libebl_pic:_pic.a=.so) libelf = ../libelf/libelf.so libdw = ../libdw/libdw.so +libeu = ../lib/libeu.a i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \ i386_retval.c i386_regs.c i386_auxv.c i386_syscall.c \ @@ -130,14 +131,14 @@ libebl_bpf_pic_a_SOURCES = $(bpf_SRCS) am_libebl_bpf_pic_a_OBJECTS = $(bpf_SRCS:.c=.os) -libebl_%.so libebl_%.map: libebl_%_pic.a $(libelf) $(libdw) +libebl_%.so libebl_%.map: libebl_%_pic.a $(libelf) $(libdw) $(libeu) @rm -f $(@:.so=.map) $(AM_V_at)echo 'ELFUTILS_$(PACKAGE_VERSION) { global: $*_init; local: *; };' \ > $(@:.so=.map) $(AM_V_CCLD)$(LINK) -shared -o $(@:.map=.so) \ -Wl,--whole-archive $< $(cpu_$*) -Wl,--no-whole-archive \ - -Wl,--version-script,$(@:.so=.map) \ - -Wl,-z,defs -Wl,--as-needed $(libelf) $(libdw) + -Wl,--version-script,$(@:.so=.map),--no-undefined \ + -Wl,-z,defs,-z,relro -Wl,--as-needed $(libelf) $(libdw) $(libeu) @$(textrel_check) libebl_i386.so: $(cpu_i386) diff --git a/libasm/Makefile.am b/libasm/Makefile.am index 8094b05..9effa6c 100644 --- a/libasm/Makefile.am +++ b/libasm/Makefile.am @@ -55,17 +55,19 @@ libasm_a_SOURCES = asm_begin.c asm_abort.c asm_end.c asm_error.c \ libasm_pic_a_SOURCES = am_libasm_pic_a_OBJECTS = $(libasm_a_SOURCES:.c=.os) -libasm_so_LDLIBS = +libasm_so_DEPS = ../lib/libeu.a ../libebl/libebl.a ../libelf/libelf.so ../libdw/libdw.so +libasm_so_LDLIBS = $(libasm_so_DEPS) if USE_LOCKS libasm_so_LDLIBS += -lpthread endif +libasm_so_LIBS = libasm_pic.a libasm_so_SOURCES = -libasm.so$(EXEEXT): libasm_pic.a libasm.map - $(AM_V_CCLD)$(LINK) -shared -o $@ -Wl,--whole-archive,$<,--no-whole-archive \ - -Wl,--version-script,$(srcdir)/libasm.map,--no-undefined \ - -Wl,--soname,$@.$(VERSION) \ - ../libebl/libebl.a ../libelf/libelf.so ../libdw/libdw.so \ +libasm.so$(EXEEXT): $(srcdir)/libasm.map $(libasm_so_LIBS) $(libasm_so_DEPS) + $(AM_V_CCLD)$(LINK) -shared -o $@ \ + -Wl,--soname,$@.$(VERSION),-z,defs,-z,relro \ + -Wl,--version-script,$<,--no-undefined \ + -Wl,--whole-archive $(libasm_so_LIBS) -Wl,--no-whole-archive \ $(libasm_so_LDLIBS) @$(textrel_check) $(AM_V_at)ln -fs $@ $@.$(VERSION) diff --git a/libdw/Makefile.am b/libdw/Makefile.am index 082d96c..634ac2e 100644 --- a/libdw/Makefile.am +++ b/libdw/Makefile.am @@ -102,17 +102,20 @@ endif libdw_pic_a_SOURCES = am_libdw_pic_a_OBJECTS = $(libdw_a_SOURCES:.c=.os) +libdw_so_LIBS = libdw_pic.a ../libdwelf/libdwelf_pic.a \ + ../libdwfl/libdwfl_pic.a ../libebl/libebl.a +libdw_so_DEPS = ../lib/libeu.a ../libelf/libelf.so +libdw_so_LDLIBS = $(libdw_so_DEPS) -ldl -lz $(argp_LDADD) $(zip_LIBS) libdw_so_SOURCES = -libdw.so$(EXEEXT): $(srcdir)/libdw.map libdw_pic.a ../libdwelf/libdwelf_pic.a \ - ../libdwfl/libdwfl_pic.a ../libebl/libebl.a \ - ../libelf/libelf.so +libdw.so$(EXEEXT): $(srcdir)/libdw.map $(libdw_so_LIBS) $(libdw_so_DEPS) # The rpath is necessary for libebl because its $ORIGIN use will # not fly in a setuid executable that links in libdw. - $(AM_V_CCLD)$(LINK) -shared -o $@ -Wl,--soname,$@.$(VERSION),-z,defs \ + $(AM_V_CCLD)$(LINK) -shared -o $@ \ + -Wl,--soname,$@.$(VERSION),-z,defs,-z,relro \ -Wl,--enable-new-dtags,-rpath,$(pkglibdir) \ -Wl,--version-script,$<,--no-undefined \ - -Wl,--whole-archive $(filter-out $<,$^) -Wl,--no-whole-archive\ - -ldl -lz $(argp_LDADD) $(zip_LIBS) + -Wl,--whole-archive $(libdw_so_LIBS) -Wl,--no-whole-archive \ + $(libdw_so_LDLIBS) @$(textrel_check) $(AM_V_at)ln -fs $@ $@.$(VERSION) diff --git a/libelf/Makefile.am b/libelf/Makefile.am index 167a832..88c1edd 100644 --- a/libelf/Makefile.am +++ b/libelf/Makefile.am @@ -95,16 +95,20 @@ libelf_a_SOURCES = elf_version.c elf_hash.c elf_error.c elf_fill.c \ libelf_pic_a_SOURCES = am_libelf_pic_a_OBJECTS = $(libelf_a_SOURCES:.c=.os) -libelf_so_LDLIBS = -lz +libelf_so_DEPS = ../lib/libeu.a +libelf_so_LDLIBS = $(libelf_so_DEPS) -lz if USE_LOCKS libelf_so_LDLIBS += -lpthread endif +libelf_so_LIBS = libelf_pic.a libelf_so_SOURCES = -libelf.so$(EXEEXT): libelf_pic.a libelf.map - $(AM_V_CCLD)$(LINK) -shared -o $@ -Wl,--whole-archive,$<,--no-whole-archive \ - -Wl,--version-script,$(srcdir)/libelf.map,--no-undefined \ - -Wl,--soname,$@.$(VERSION),-z,defs,-z,relro $(libelf_so_LDLIBS) +libelf.so$(EXEEXT): $(srcdir)/libelf.map $(libelf_so_LIBS) $(libelf_so_DEPS) + $(AM_V_CCLD)$(LINK) -shared -o $@ \ + -Wl,--soname,$@.$(VERSION),-z,defs,-z,relro \ + -Wl,--version-script,$<,--no-undefined \ + -Wl,--whole-archive $(libelf_so_LIBS) -Wl,--no-whole-archive \ + $(libelf_so_LDLIBS) @$(textrel_check) $(AM_V_at)ln -fs $@ $@.$(VERSION) -- 2.1.4