HP-UX 11.11, ERROR: Circular dependency detected

[Paul Ackersviller <pda%sdf.org@localhost>]

I'm attempting source builds on HP-UX 11.11 with gcc-4.2.3, but am
getting an error that looks like a gcc version check is failing.
Not being at all familiar with BSD makefiles, I'll just spit out
the following...


===> Checking for vulnerabilities in compat_headers-0.2
===> Installing dependencies for compat_headers-0.2
=> Build dependency gcc>=2.95.3nb7: NOT found
=> Verifying reinstall for ../../lang/gcc
=> Bootstrap dependency digest>=20010302: NOT found
=> Verifying reinstall for ../../pkgtools/digest
===> Checking for vulnerabilities in digest-20080510
===> Installing dependencies for digest-20080510
=> Build dependency compat_headers>=0.2: NOT found
=> Verifying reinstall for ../../pkgtools/compat_headers
ERROR: This package has set PKG_FAIL_REASON:
ERROR: Circular dependency detected
*** Error code 1

Stop.
bmake: stopped in /fsdev02/pkgsrc/pkgtools/compat_headers
*** Error code 1

Stop.
bmake: stopped in /fsdev02/pkgsrc/pkgtools/digest
*** Error code 1

Stop.
bmake: stopped in /fsdev02/pkgsrc/lang/gcc
*** Error code 1

Stop.
bmake: stopped in /fsdev02/pkgsrc/pkgtools/compat_headers