Port Bug Report: PERL5 Interface does not compile

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Jonathan Zdziarski
Your email address : jonz(at)netrail(dot)net

Category : install: compile
Severity : serious

Summary: PERL5 Interface does not compile

System Configuration
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Operating System : Solaris 7

PostgreSQL version : 6.4.2

Compiler used : gcc 2.8.1

Hardware:
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ASUS P2L97-DS, Dual P-II 333 Mhz, 512MB RAM, 9 Gig Disk

Versions of other tools:
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flex 2.5.4a bison 1.27 gcc 2.8.1 gmake 3.77

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Problem Description:
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Using the latest version of flex and all, I still am not able to compile the PERL5 Interface. This is what I get every time...

Writing Makefile for Pg
make[2]: Leaving directory `/usr/share/src/pgsql/src/interfaces'
make[2]: Entering directory `/usr/share/src/pgsql/src/interfaces/perl5'
mkdir blib
mkdir blib/lib
mkdir blib/arch
mkdir blib/arch/auto
mkdir blib/arch/auto/Pg
mkdir blib/lib/auto
mkdir blib/lib/auto/Pg
mkdir blib/man3
cp Pg.pm blib/lib/Pg.pm
AutoSplitting blib/lib/Pg.pm (blib/lib/auto/Pg)
/usr/local/bin/perl -I/usr/local/lib/perl5/5.00554/i86pc-solaris -I/usr/local/lib/perl5/5.00554 /usr/local/lib/perl5/5.00554/ExtUtils/xsubpp -typemap /usr/local/lib/perl5/5.00554/ExtUtils/typemap -typemap typemap Pg.xs >xstmp.c && mv xstmp.c Pg.c
gcc -c -I../libpq -I../../include -I/usr/local/include -O -DVERSION=\"1.8.0\" -DXS_VERSION=\"1.8.0\" -fPIC -I/usr/local/lib/perl5/5.00554/i86pc-solaris/CORE Pg.c
Pg.xs: In function `XS_Pg_PQprint':
Pg.xs:584: `na' undeclared (first use in this function)
Pg.xs:584: (Each undeclared identifier is reported only once
Pg.xs:584: for each function it appears in.)
Pg.xs: In function `XS_PG_results_fetchrow':
Pg.xs:1256: `sv_undef' undeclared (first use in this function)
Pg.xs: In function `XS_PG_results_print':
Pg.xs:1296: `na' undeclared (first use in this function)
make[2]: *** [Pg.o] Error 1
make[2]: Leaving directory `/usr/share/src/pgsql/src/interfaces/perl5'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/usr/share/src/pgsql/src/interfaces'
make: *** [all] Error 2

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Test Case:
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Just try to compile it under S7.

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Solution:
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