SunOS amber 5.7 Generic_106542-07 i86pc i386 i86pc
gcc version 2.95.1 19990816 (release)
Postgresql 6.5.2

gmake all

...

gmake[2]: Leaving directory
`/tmp/sql/postgresql-6.5.2/src/interfaces/libpq++'
if [ "all" = "install" ]; then \
gmake -w install-perl5; \
else \
gmake -w perl5/Makefile; \
gmake -w -C perl5 all; \
fi
gmake[2]: Entering directory `/tmp/sql/postgresql-6.5.2/src/interfaces'
cd perl5 && perl5 Makefile.PL
/bin/sh: perl5: not found
gmake[2]: *** [perl5/Makefile] Error 1
gmake[2]: Leaving directory `/tmp/sql/postgresql-6.5.2/src/interfaces'
gmake[2]: Entering directory
`/tmp/sql/postgresql-6.5.2/src/interfaces/perl5'
gmake[2]: *** No rule to make target `all'. Stop.
gmake[2]: Leaving directory
`/tmp/sql/postgresql-6.5.2/src/interfaces/perl5'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/tmp/sql/postgresql-6.5.2/src/interfaces'
gmake: *** [all] Error 2