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6ab674ebff
With gcc-4.9, a new -fstack-protector-strong flag is available that is between -fstack-protector (pretty weak) and -fstack-protector-all (pretty strong) that provides good trade-offs between overhead but still providing good coverage. Update the places in glibc that use ssp to use this flag when it's available. This also kills off the indirection of hardcoding the flag name in the Makefiles and adding it based on a have-ssp boolean. Instead, the build always expands the $(stack-protector) variable to the best ssp setting. This makes the build logic a bit simpler and allows people to easily set to a diff flag like: make stack-protector=-fstack-protector-all
105 lines
2.9 KiB
Makefile
105 lines
2.9 KiB
Makefile
# Copyright (C) 1998-2015 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Sub-makefile for nscd portion of the library.
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#
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subdir := nscd
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include ../Makeconfig
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ifneq ($(use-nscd),no)
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routines := nscd_getpw_r nscd_getgr_r nscd_gethst_r nscd_getai \
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nscd_initgroups nscd_getserv_r nscd_netgroup
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aux := nscd_helper
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endif
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# To find xmalloc.c
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vpath %.c ../locale/programs
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nscd-modules := nscd connections pwdcache getpwnam_r getpwuid_r grpcache \
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getgrnam_r getgrgid_r hstcache gethstbyad_r gethstbynm3_r \
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getsrvbynm_r getsrvbypt_r servicescache \
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dbg_log nscd_conf nscd_stat cache mem nscd_setup_thread \
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xmalloc xstrdup aicache initgrcache gai res_hconf \
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netgroupcache
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ifeq ($(build-nscd)$(have-thread-library),yesyes)
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others += nscd
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others-pie += nscd
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install-sbin := nscd
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extra-objs = $(nscd-modules:=.o)
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endif
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all-nscd-modules := $(nscd-modules) selinux
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ifeq (yes,$(have-selinux))
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ifeq (yes,$(have-libaudit))
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libaudit = -laudit
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ifeq (yes,$(have-libcap))
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libcap = -lcap
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endif
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endif
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nscd-modules += selinux
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selinux-LIBS := -lselinux $(libaudit) $(libcap)
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# The configure.ac check for libselinux and its headers did not use
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# $SYSINCLUDES. The directory specified by --with-headers usually
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# contains only the basic kernel interface headers, not something like
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# libselinux. So the simplest thing is to presume that the standard
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# system headers will be ok for this file.
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$(objpfx)nscd_stat.o: sysincludes = # nothing
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$(objpfx)selinux.o: sysincludes = # nothing
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endif
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LDLIBS-nscd = $(selinux-LIBS)
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include ../Rules
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CFLAGS-nscd_getpw_r.c = -fexceptions
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CFLAGS-nscd_getgr_r.c = -fexceptions
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CFLAGS-nscd_gethst_r.c = -fexceptions
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CFLAGS-nscd_getai.c = -fexceptions
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CFLAGS-nscd_initgroups.c = -fexceptions
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CPPFLAGS-nscd += -D_FORTIFY_SOURCE=2
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ifeq (yesyes,$(have-fpie)$(build-shared))
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CFLAGS-nscd += $(pie-ccflag)
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endif
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CFLAGS-nscd += $(stack-protector)
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ifeq (yesyes,$(have-fpie)$(build-shared))
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LDFLAGS-nscd = -Wl,-z,now
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endif
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# Set libof-nscd.
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cpp-srcs-left := $(nscd-modules)
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lib := nscd
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include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
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$(objpfx)nscd: $(nscd-modules:%=$(objpfx)%.o)
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ifeq ($(build-shared),yes)
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$(objpfx)nscd: $(shared-thread-library) $(common-objpfx)nis/libnsl.so
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else
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$(objpfx)nscd: $(static-thread-library) $(common-objpfx)nis/libnsl.a
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endif
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