While researching a different Linux Wireshark build problem I found the
following:
A default Linux Wireshark './configure && make' with net-snmp present
uses an "enhanced" set of CFLAGS. That is: a
'./configure --without-net-snmp && make' uses a distinctly (smaller) set
of CFLAGS than when building with net-snmp present.
This happens because if net-snmp is present than "net-snmp-config
--cflags" is used to get a list of compiler options to be added to
CFLAGS (& CXXFLAGS).
The options included in CFLAGS *only* when building with net-snmp (the
default build) include the following;
-pipe
--param=ssp-buffer-size=4
-Wp,-D_FORTIFY_SOURCE=2
-fexceptions
-fstack-protector
-fasynchronous-unwind-tables
-fno-strict-aliasing
-m32
-march=i386
-mtune=generic
-Ulinux
-Dlinux=linux
-D_REENTRANT
-D_GNU_SOURCE
-D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64
-I/usr/include/gdbm
-I/usr/lib/perl5/5.8.8/i386-linux-thread-multi/CORE
-I.
-I/usr/include/net-snmp
So: my question: should any of the above options be used for a Wireshark
build when using --without-snmp??
Also: as noted elsewhere on the list it sounds like the use of net-snmp
will be replaced by the use of libsmi, If so, I'm assuming that the
additional options as above will no longer be part of CFLAGS for a
Wireshark build. Again: In this case will any of the above options need
to be added to the CFLAGS used for making Wireshark ?
(The exception to the above is wiretap: the CFLAGS used in the wiretap
Makefile do not include the additional flags as above. I'll guess that
this is because a separate configure is done for wiretap).
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