What Linux libs needed for connectToHost() to work?

[RolandHughes]

I'm hoping someone knows the answer or can point me to a cheat sheet for this.

Qt 4.8.x
Desktop 32-bit Mint 14
target 32-bit bitbaked Linux

Using the smtp project library to send email works flawlessly on the desktop. On the embedded target connectToHost() (and the secured version) both fail instantly. Since they do not have a debug version of Qt on the target I cannot step into the call to identify exactly what is missing. I am pretty certain those who baked the cake left something out as has been found previously. Not their fault really. They started really small and have been adding things as the project progressed.

Yes, I can step through on the desktop and come up with a longer list of function calls to track back, but, was hoping someone had already stumbled into this.

The really odd part is the library test for SSL comes back as supported, so it does appear they baked in "most" of what was needed.

Thanks,

[wysota]

Qt on Linux uses BSD sockets for networking and AFAIK this is part of glibc thus you don't need any extra libraries. Did you verify using system tools (e.g. wireshark) there is no network traffic between the target and its environment?


This is the list of libraries my QtNetwork links against:
$ ldd ~/Qt/5.3/gcc_64/lib/libQt5Network.so | awk '{ print $1; }'
linux-vdso.so.1
libQt5Core.so.5
libpthread.so.0
libstdc++.so.6
libc.so.6
libicui18n.so.52
libicuuc.so.52
libdl.so.2
libgthread-2.0.so.0
librt.so.1
libglib-2.0.so.0
libm.so.6
libgcc_s.so.1
/lib64/ld-linux-x86-64.so.2
libicudata.so.52
libpcre.so.3


You can see it is just pthreads, icu and pcre apart the other standard libraries (+dynamically loaded OpenSSL in case of using SSL sockets).

[anda_skoa]

Since you mention SSL: does connectToHost() fail or connectToHostEncrypted()?

Cheers,
_

[RolandHughes]

Since you mention SSL: does connectToHost() fail or connectToHostEncrypted()?

Cheers,
_

Both. And the call to determine if SSL is supported actually returns true.

@wysota,

Thanks for the list. They had the icu stuff in the build environment, but it did not get deployed to target. Everything else was there. I will send up a flare and get them cranking on a new build.