--- Begin Message ---
On Jul 31, 2021, at 3:37 AM, Denis Ovsienko via tcpdump-workers
wrote:
> # Solaris 11 with GCC #
> This is the opposite: the pre-compile libpcap feature test programs
> fail to link so all libpcap feature tests fail. However, libpcap is
> detected as available and the build process resorts to missing/ and
> produces a binary of tcpdump that is mostly functional:
>
> $ /tmp/tcpdump_build_matrix.XX06MD.a/bin/tcpdump -D
> /tmp/tcpdump_build_matrix.XX06MD.a/bin/tcpdump: illegal option -- D
>
> The problem seems to be that the feature test linking instead of using
> the flags returned by pcap-config points exactly to the 32-bit version
> of libpcap and fails:
>
> $ pcap-config --libs
> -L/usr/lib -lpcap
solaris11$ /usr/bin/pcap-config --libs
-L/usr/lib -lpcap
solaris11$ /usr/bin/amd64/pcap-config --libs
-L/usr/lib/amd64 -R/usr/lib/amd64 -lpcap
on my x86-64 Solaris 11 VM.
From the Solaris 64-bit Developer's Guide:
http://math-atlas.sourceforge.net/devel/assembly/816-5138.pdf
the equivalent of "amd64" on SPARC is probably "sparcv9".
So tcpdump (and anything else using libpcap) should, on Solaris, determine the
target architecture and run the appropriate version of pcap-config.
I'll look at that.
(Apropos of nothing, that Sun document also says of the 64-bit SPARC ABI:
Structure passing and return are accomplished differently. Small data
structures and some floating point arguments are now passed directly in
registers.
I'm curious which, if any, ABIs pass data structures *and unions* that would
fit in a single register in a register.--- End Message ---
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