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Subject: [Bug other/45915] New: Check for gnu_unique_object in ld.so in gcc/configure.ac is broken for non-glibc ldd
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45915

           Summary: Check for gnu_unique_object in ld.so in
                    gcc/configure.ac is broken for non-glibc ldd
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gcc-tgc@jupiterrise.com
              Host: i386-pc-solaris2.8


While building gcc-4.6-20101002 with this configure invocation:
./gcc-4.6-20101002/configure --prefix=/usr/tgcware/gcc46 --with-gnu-as
--with-as=/opt/csw/bin/gas --without-gnu-ld --with-ld=/usr/ccs/bin/ld
--disable-nls --enable-shared --enable-languages=c,c++,fortran,ada

Where gas is from binutils 2.20.1 (Blastwave build).

I noticed this output:

checking assembler for gnu_unique_object... yes
expr: syntax error
/export/home/pkgsrc/build/gcc-4.6-20101002/gcc/configure: test: : integer
expression expected

Looking in gcc/configure.ac beginning in line 3840 is the problem.
It runs 'ldd --version' and expects output that can be parsed into an integer.
This fails on Solaris and $glibcmajor is empty when expr tries to do math with
it causing the error above to be printed.