[Bug nscd/12125] New: Problems linking nscd under certain gcc conditions

["viriketo at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=12125

           Summary: Problems linking nscd under certain gcc conditions
           Product: glibc
           Version: 2.12
            Status: NEW
          Severity: normal
          Priority: P2
         Component: nscd
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: viriketo@gmail.com


The 'nscd' makefile reads:
ifeq (yes,$(have-ssp))
nscd-cflags += -fstack-protector
endif
...
ifeq (yesyes,$(have-fpie)$(build-shared))
relro-LDFLAGS += -Wl,-z,now

$(objpfx)nscd: $(addprefix $(objpfx),$(nscd-modules:=.o))
    $(+link-pie)
endif



And the link-pie defined in 'Makeconfig' says to use "-nostdlib" in the gcc
linking call.

The check for the stack protector does not use "-nostdlib", so a simple
"-fstack-protector" succeeds. Here is the gcc spec part:
*link_ssp:
%{fstack-protector|fstack-protector-all:-lssp_nonshared -lssp}

*link_command:
... %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)} ...

So, the trouble appears when glibc is:
- build as shared
- -fpie found
- -fstack-protector found

Because it tries to link nscd with -nostdlib but without supplying
-lssp_noshared -lssp

This problem happens in glibc 2.12.1 and glibc 2.11 at least.

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