Anybody building Wireshark 3.1 under Cygwin using gcc 7.4.0 ?

edit

These are the changes:

In "file_util.h":

#ifndef O_BINARY        /* WB TMP MODIF */
#define O_BINARY   0    /* Win32 needs the O_BINARY flag for open() */
#endif

"editcap.c", "ftype-time.c" (for strptime):

#ifdef      __CYGWIN__          /* WB TMP MODIF */
#define _XOPEN_SOURCE        700
#undef      __STRICT_ANSI__ /* Maybe also neded for strptime? */
#endif

"…/dissectors/packet-s1ap.c": warning error: argument ‘offset’ might be clobbered by ‘longjmp’ or ‘vfork’ [-Werror=clobbered].

So, in file "epan/dissectors/CMakeList.txt":

set_source_files_properties(
    ${CLEAN_FILES}
    PROPERTIES
    COMPILE_FLAGS "${WERROR_COMMON_FLAGS}"
)

#WB TMP MODIF
set_source_files_properties(
    ${CMAKE_CURRENT_SOURCE_DIR}/packet-s1ap.c
    PROPERTIES
    COMPILE_FLAGS "-O2 ${WERROR_COMMON_FLAGS} -Wno-error=clobbered" 
)

In file "interface_toolbar_reader.cpp":

/* WB TMP MODIF */
#include <sys/time.h>
#include <sys/select.h>

Building Wireshark using Cywin isn't a supported option, so you're on your own.

There is a buildable Windows version using Visual Studio Community editions, so what are you trying to achieve building under Cygwin?

Grahamb - It'a simply :-) Because my boss doesn't like Microsoft license restrictions.

I hope you're being paid well to try to achieve this, good luck.

What are the perceived licence restrictions as regards to Wireshark on Windows built using VC? I ask as I'm not aware of any.

Using for "commercial use" is not perfectly precised :-/ My firm made only linux software, but we need Windows Wireshark with our plugins for internal testing.

By the way, why there is no suport for Cygwin? It looks like not to much left to do.

Many companies large and small build Wireshark and plugins on Windows using MSVC with no issue whatsoever. Examining the Visual Studio 2019 Community Licence reveals that:

• Any number of your users may use the software to develop and test applications released under Open Source Initiative (OSI) approved open source software licenses.

Note that Wireshark and plugins are licenced under the GPL.

There is no support for Cygwin as no-one has come up with the time or motivation to add it. The result will likely be slower than the native Windows build (due to the Cygwin compatibility layer) and will require a modified installer to handle the additional Cygwin dependencies.

The Windows native build is a first class supported version of Wireshark.