[Bug bootstrap/52850] New: Linker path ends up using wrong zlib

[skunk at iskunk dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52850

             Bug #: 52850
           Summary: Linker path ends up using wrong zlib
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: skunk@iskunk.org


Bootstrapping GCC on AIX fails with

tg-gcc -mminimal-toc   -g -fkeep-inline-functions -DIN_GCC   -W -Wall
-Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -Wold-style-definition -Wc++-compat -fno-common 
-DHAVE_CONFIG_H -Wl,-bmaxdata:0x40000000 -o cc1 c-lang.o c-family/stub-objc.o
attribs.o c-errors.o c-decl.o c-typeck.o c-convert.o c-aux-info.o
c-objc-common.o c-parser.o tree-mudflap.o c-family/c-common.o
c-family/c-cppbuiltin.o c-family/c-dump.o c-family/c-format.o
c-family/c-gimplify.o c-family/c-lex.o c-family/c-omp.o c-family/c-opts.o
c-family/c-pch.o c-family/c-ppoutput.o c-family/c-pragma.o
c-family/c-pretty-print.o c-family/c-semantics.o c-family/c-ada-spec.o
default-c.o rs6000-c.o \
          cc1-checksum.o main.o tree-browser.o libbackend.a libcommon-target.a
libcommon.a ../libcpp/libcpp.a ../libdecnumber/libdecnumber.a libcommon.a
../libcpp/libcpp.a  -liconv ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a    -L/tg/freeport/arch/aix64/lib
-L/tg/freeport/arch/aix64/lib -L/tg/freeport/arch/aix64/lib -lmpc -lmpfr -lgmp 
 -L../zlib -lz
ld: 0711-317 ERROR: Undefined symbol: .deflateInit_
ld: 0711-317 ERROR: Undefined symbol: .zError
ld: 0711-317 ERROR: Undefined symbol: .deflate
ld: 0711-317 ERROR: Undefined symbol: .deflateEnd
ld: 0711-317 ERROR: Undefined symbol: .inflateInit_
ld: 0711-317 ERROR: Undefined symbol: .inflate
ld: 0711-317 ERROR: Undefined symbol: .inflateEnd
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.
collect2: ld returned 8 exit status
gmake[3]: *** [cc1] Error 1
gmake[3]: Leaving directory `/tmp/gcc-4.7.0-build/gcc'
gmake[2]: *** [all-stage1-gcc] Error 2
gmake[2]: Leaving directory `/tmp/gcc-4.7.0-build'
gmake[1]: *** [stage1-bubble] Error 2
gmake[1]: Leaving directory `/tmp/gcc-4.7.0-build'
gmake: *** [bootstrap-lean] Error 2


The problem is that there is an unsuitable copy of libz installed under
/tg/freeport/arch/aix64/lib (where suitable copies of gmp/mpfr/mpc are
located), but since "-L../zlib -lz" is specified after
"-L/tg/freeport/arch/aix64/lib", zlib is obtain from the latter location.

Either "-L../zlib" should be specified prior to any user-supplied library
paths, or the link invocation should specify the libz library file explicitly
rather than use "-lz".