how about a 'snowleopardfixes' library port?

[Clemens Lang]

Hi,

On Tue, Aug 23, 2016 at 10:00:05AM -0700, Ken Cunningham wrote:
> clang -dynamiclib -std=gnu99 strnlen.c getline.c -current_version 1.0 -compatibility_version 1.0 -o libsnowleopardfixes.a.dylib

You need -install_name ${prefix}/lib/libsnowleopardfixes.a.dylib here.

> configure:3663: ./conftest
> dyld: Library not loaded: libsnowleopardfixes.a.dylib
>   Referenced from: /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_sysutils_lnav/lnav/work/lnav-0.8.1/./conftest
>   Reason: image not found
> ./configure: line 3665: 50401 Trace/BPT trap          ./conftest$ac_cv_exeext
> configure:3667: $? = 133
> configure:3674: error: in `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_sysutils_lnav/lnav/work/lnav-0.8.1':
> configure:3676: error: cannot run C++ compiled programs.
> If you meant to cross compile, use `--host'.

This check just tests whether you can run compiled programs. Because
your library does not have a correct install name it is not found by the
loader, which causes the test program to fail.

The configure script just happens to assume that you might be
cross-compiling if you cannot run the generated binaries.

-- 
Clemens