Cross compilation of GStreamer in Ubuntu docker container resulting in not all subprojects being built

[Matthew Waters]

You need to have a cross-build of openssl or gnutls to be able to build
libnice.

I assume that the 'pkg-config --version openssl' is only showing you the
system versions which would be built for linux, not mingw.

On 20/7/20 12:16 am, Ben Rush wrote:
> In particular, I'm having trouble getting the webrtc library to build,
> and it appears as though -- if I track it back far enough -- the issue
> is with libnice. The meson build output results in the output at the
> end of this email (I'll defer posting it now to make the email reading
> easier). 
>
> According to the error, the problem is that pkg-config is unable to
> find openssl. But running this at the command prompt (after attaching
> to the container), results in what appears to be a positive for
> finding openssl: 
>
> root at b5f46e708137:/gst-build# pkg-config --version openssl
> 0.29.1
>
> Ultimately I'm curious if someone has been able to build webrtc and
> the like cross compiled for Windows from Ubuntu, etc. I'd love to have
> a nice, dockerized system for building for Windows but after about day
> of fighting, I've yet to get it to work completely. 
>
> Here is the output: 
>
> |Executing subproject libnice method meson
> |
> |Project name: libnice
> |Project version: 0.1.17.1
> |C compiler for the build machine: cc (gcc 7.5.0 "cc (Ubuntu
> 7.5.0-3ubuntu1~18.04) 7.5.0")
> |C linker for the build machine: cc ld.bfd 2.30
> |C compiler for the host machine: x86_64-w64-mingw32-gcc (gcc 7.3.0
> "x86_64-w64-mingw32-gcc (GCC) 7.3-win32 20180312")
> |C linker for the host machine: x86_64-w64-mingw32-gcc ld.bfd 2.30
> |Library iphlpapi found: YES
> |Library ws2_32 found: YES
> |Checking for function "clock_gettime" : NO (cached)
> |Library rt found: NO
> |Checking for function "clock_gettime" with dependency -lrt: NO (cached)
> |Has header "arpa/inet.h" : NO (cached)
> |Has header "net/in.h" : NO
> |Has header "netdb.h" : NO (cached)
> |Has header "ifaddrs.h" : NO
> |Has header "unistd.h" : YES (cached)
> |Checking for function "poll" : NO (cached)
> |Checking for function "getifaddrs" : NO
> |Compiler for C supports arguments -fno-strict-aliasing: YES
> |Message: warning level: 1
> |Message: werror enabled: false
> |Dependency gio-2.0 found: YES 2.62.6 (cached)
> |Dependency (anonymous) from subproject subprojects/glib found: YES 2.62.6
> |Dependency (anonymous) from subproject subprojects/glib found: YES 2.62.6
> |Dependency (anonymous) from subproject subprojects/glib found: YES 2.62.6
> |Dependency gthread-2.0 from subproject subprojects/glib found: YES 2.62.6
> |Message: Crypto library requested: auto
> |Run-time dependency gnutls found: NO (tried pkgconfig and cmake)
> |Run-time dependency openssl found: NO (tried pkgconfig and cmake)
> |Looking for a fallback subproject for the dependency openssl
> |Subproject directory not found and openssl.wrap file not found
> |Subproject  subprojects/openssl is buildable: NO (disabling)
> |Dependency openssl from subproject subprojects/openssl found: NO
> |Library crypto found: NO
> |Library eay32 found: NO
> |
> |subprojects/libnice/meson.build:249:4: Exception: Problem
> encountered: Either GnuTLS or OpenSSL is required as crypto library,
> but neither was found
>
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> gstreamer-devel at lists.freedesktop.org
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