I'm getting some difficulties on building the tutorial codes of Anjay https://github.com/AVSystem/Anjay. the doc wasn't really helpful.
I tried a simple :
cd examples/tutorial/custom-object
cmake . && make
but I'm getting this message :
By not providing "Findanjay.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "anjay", but
CMake did not find one.
Could not find a package configuration file provided by "anjay" with any of
the following names:
anjayConfig.cmake
anjay-config.cmake
Add the installation prefix of "anjay" to CMAKE_PREFIX_PATH or set
"anjay_DIR" to a directory containing one of the above files. If "anjay"
provides a separate development package or SDK, be sure it has been
installed.
CMake Warning (dev) in CMakeLists.txt:
No cmake_minimum_required command is present. A line of code such as
cmake_minimum_required(VERSION 3.10)
should be added at the top of the file. The version specified may be lower
if you wish to support older CMake versions for this project. For more
information run "cmake --help-policy CMP0000".
This warning is for project developers. Use -Wno-dev to suppress it.
I would appreciate any suggetions.
Thank you.
I was doing the same thing. The error is because you have not installed anjay libraries on your local system or provide a way for CMake to find it.
I installed it by following steps mentioned in compilation docs
In the root of Anjay directory execute the following:
cmake . && make && sudo make install
Related
I am working on a small C executable project using Jetbrains CLion 2019.3, MinGW 8.1, and also the Conan C/C++ Package Manager 1.21.1. I am refreshing my knowledge about C and want to learn about new tools like Conan. My main development environment is Windows, but this project is intended to be cross-platform; I would like to be able to build and run the application on Linux/Unix as well.
Since my application needs to compute signatures using HMACSHA1, I want to use the OpenSSL library, so I added the OpenSSL/1.1.1a#conan/stable package to the requires section of my conanfile.txt file, and I also created a Conan profile for MinGW that has the following options:
toolchain=$MINGW64_PATH
target_host=x86_64-w64-mingw32
cc_compiler=gcc
cxx_compiler=g++
[env]
CONAN_CMAKE_FIND_ROOT_PATH=$toolchain
CHOST=$target_host
AR=$target_host-ar
AS=$target_host-as
RANLIB=$target_host-ranlib
CC=$target_host-$cc_compiler
CXX=$target_host-$cxx_compiler
STRIP=$target_host-strip
RC=$target_host-windres
[settings]
os_build=Windows
arch_build=x86_64
# We are cross-building to Windows
os=Windows
arch=x86_64
compiler=gcc
# Adjust to the gcc version of your MinGW package
compiler.version=8.1
compiler.libcxx=libstdc++11
build_type=Release
The MINGW64_PATH points to my MinGW installation folder.
When running conan install it complains about a missing package (obviously a dependency package of OpenSSL) that does not exist:
zlib/1.2.11#conan/stable: WARN: Can't find a 'zlib/1.2.11#conan/stable' package for the specified settings, options and dependencies:
- Settings: arch=x86_64, build_type=Release, compiler=gcc, compiler.version=8.1, os=Windows
- Options: minizip=False, shared=False
- Dependencies:
- Package ID: eb34f13b437ddfd63abb1f884c4b8886c48b74cd
ERROR: Missing prebuilt package for 'zlib/1.2.11#conan/stable'
Try to build it from sources with "--build zlib"
Or read "http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package"
Since I am a noob using Conan, I have no clue how I can fix this problem. What needs to be done to fix this issue, and also can I fix this on my own, or do I need help from the package author?
I found a description of the Missing prebuilt package error at https://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package, but it does not help much.
so I added the OpenSSL/1.1.1a#conan/stable package to the requires
That package is obsolete, you can check it on Conan Community repository. You should try openssl/1.1.1a# instead, which is maintained by the new Conan Center Index.
conan install openssl/1.1.1d#
Where is the namespace? It has been removed, take a look on more information about recipes.
Since I am a noob using Conan, I have no clue how I can fix this problem. What needs to be done to fix this issue, and also can I fix this on my own, or do I need help from the package author?
As the FAQ recommends, you should build by yourself, running the command proposed by the error message:
conan install openssl/1.1.1a# --build zlib
But I'm sure it won't be enough, you will need to build OpenSSL too. So, the best approach in your situation is:
conan install openssl/1.1.1a# --build missing
Now, Conan will build from sources anything which is not pre-built on server side.
To summarize, this is not an error, like something is broken.
When you asked for OpenSSL 1.1.1a, Conan found the recipe on Conan Center, which explain how to build OpenSSL, however it didn't find your pre-built package, following your settings and options.
Well, MingW is not used in Conan Center Index, because there is no enough demand, all supported platforms and configurations are listed in the Wiki. But this specific recipe should support MingW, since when it was part of Conan Community, MingW was present in package lists for building.
I would say, you can use 1.1.1d instead, which newer and safer than 1.1.1a.
The title states the problem statement: I'm trying to create a CMake project utilizing the libwebsocket library, but I can't find any information for doing so.
Is there anyone who have tried this? A simple CMakeLists.txt for e.g. the test-server program would be much appreciated!
I've compiled and installed the library on my Ubuntu 14.04 machine.
EDIT: I would also like to know if anyone has experience in using the libwebsocket lib w/ C++?
EDIT 2:
After using #evadeflow's answer I'm able to run cmake and build the project. However now I get the following runtime error:
And here's an ls of the /usr/local/lib/ folder
It seems like the libwebsockets.so.7 file is not found?
From CMake:
${LIB_WEBSOCKETS_INCLUDE_DIRS} = /usr/local/lib
${LIB_WEBSOCKETS_INSTALL_DIR} = /usr/local
EDIT 3:
Solved edit 2 by:
Editing the file /etc/ld.so.conf and add /usr/local/lib.
Reference: https://lonesysadmin.net/2013/02/22/error-while-loading-shared-libraries-cannot-open-shared-object-file/
If you've already installed libwebsockets, something like this ought to work:
cmake_minimum_required(VERSION 2.8)
find_package(PkgConfig)
pkg_check_modules(LIB_WEBSOCKETS REQUIRED libwebsockets)
get_filename_component(
LIB_WEBSOCKETS_INSTALL_DIR
${LIB_WEBSOCKETS_LIBRARY_DIRS}
DIRECTORY
)
add_executable(
test-server
test-server/test-server.c
test-server/test-server-http.c
test-server/test-server-dumb-increment.c
test-server/test-server-mirror.c
test-server/test-server-status.c
test-server/test-server-echogen.c
)
target_link_libraries(
test-server
${LIB_WEBSOCKETS_LIBRARIES}
)
set_target_properties(
test-server
PROPERTIES
INCLUDE_DIRECTORIES
${LIB_WEBSOCKETS_INCLUDE_DIRS}
LINK_FLAGS
"-L${LIB_WEBSOCKETS_LIBRARY_DIRS}"
COMPILE_DEFINITIONS
INSTALL_DATADIR="${LIB_WEBSOCKETS_INSTALL_DIR}/share"
)
This is basically a stripped-down version of what's in the CMakeLists.txt file from the libwebsockets github project, without all the platform- and build-specific conditionals.
I hope this is enough to satisfy your request for a 'simple' CMakeLists.txt example. I tested it with CMake version 2.8.12.2; it should work fine as-is if you've installed libwebsockets to its default prefix of /usr/local; however, if you installed to a different location, you will need to set PKG_CONFIG_PATH in the environment from which you invoke cmake.
Also, as explained in the CMake documentation, you will need to replace DIRECTORY with PATH in the get_filename_component() invocation if you're using CMake 2.8.11 or earlier.
UPDATE: Regarding the file not found error from your follow-up comment, this is almost certainly due to libwebsocket.so[.7] not being on the linker's default path. There are at least three ways to fix this, but the easiest way to verify that this is the problem would be to just launch the app from the terminal using:
$ LD_LIBRARY_PATH=/usr/local/lib ./test-server
If it works, you know that was the issue. (Oops—I see you've figured it out in the meantime. Yeah, updating /etc/ld.so.conf is another way. Or, you can force CMake to link to the static version of libwebsockets [as described in this answer] is another. But I like your solution best.)
UPDATE: One thing that wasn't mentioned about /etc/ld.so.conf is that you generally need to run sudo /sbin/ldconfig after editing it in order to update the shared library cache. And—when setting non-default paths for a particular application—many people consider it good form to add a new 'sub-config file' in /etc/ld.so.conf.d rather than edit the global ldconfig file. (For the case of adding /usr/local/lib, though, this is such a common requirement I'd be inclined to dump it in the global config, which is what lots of Linux distros do, anyway.)
After I followed the instructions in (Building Custom ModSecurity Modules)section in modsecurity dev guide in order to compile (mod_tfn_reverse.c) using the command apxs -ca mod_tfn_reverse.c, I'm still finding "fatal errors" such as unable to find the file modsecurity.h mentioned in the header of the C document.
Here is the link to the source on github modsec
Instructions I did:
I am using Ubuntu 14.4 64bits (New installation with updates).
I installed "apache dev" package, to run "APXS" command on terminal.
Downloaded "modsecurity" zip file from github.
I extracted the zip file, then I located where the mod_tfn_reverse.c is.
It's path : ModSecurity/ext/mod_tfn_reverse.c
Then I changed the directory to the targeted file CD modsecurity/ext
as I placed the folder in "home".
Finally, I executed the command apxs -ca mod_tfn_reverse.c.
These are the instructions I did, apxs works, but the compilation fails because "modsecurity.h" declared in the header was not found, I searched this file I found it in another directory (ModSecurity/apache2/modsecurity.h).
So, the difficulty is, how can I successfully compile that specific file and have the module done and ready to use in apache2 server.
I am also confused about what are the other archives, headers, and development tools required to:
to compile a custom apache module.
to compile mod_tfn_reverse.c, in my case, knowing that this is only the starting point to create custom module for modsecurity.
This is covered by the included README:
apxs -I<MODSECURITY_SOURCE_CODE> -I/usr/include/libxml2 \
-ca mod_tfn_reverse.c
I have encountered problem in building a solution of OpenEXR using Cmake for VS2013.
FYI, i have installed the prerequisite of OpenEXR, ILMBase and specify the path in system path variables. However, when i configure Cmake to produce solution for VS2013, the ILMBase package prefix cant be located.
Is there any solution to this??
if you still have the problem: Follow the readme, so don't use the cmake gui, but type everything in the command line (which includes specifying ILMBASE_PACKAGE_PREFIX)
Just spend 3 straight hours trying to solve the java.lang.UnsatisfiedLinkError: no jtokyocabinet in java.library.path problem in Eclipse in Linux.
Downloaded TC and TC-Java sources,
Built them both using ./config --prefix=/usr (so everything "JNI" related should be in /usr/lib)
Set the LD_LIBRARY_PATH=/usr/lib and CLASSPATH="$CLASSPATH:/usr/local/lib/tokyocabinet.jar" and exported both in .profile
Imported tokyocabinet.jar into the project.
Am I missing a setting other than the proper -Djava.library.path=. settings? I can't even find anything on the net about jtokyocabinet on the web or in the documentation. What's the secret sauce to getting this thing to work?
try to make a link to libjtokyocabinet.so...0 in your JAVA_HOME/jre/lib/i386.
it is because your code can not find tokyocabinet's *.so and *.a files, usually they are in /usr/local/lib, run the following command:
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
and then try your code again.
Have the same problem, in my case, using OpenSUSE 12.3 64 bits and Eclipse.
First, the kyotocabinet-java package can be downloaded from this repository:
http://download.opensuse.org/repositories/devel:/libraries:/c_c++/openSUSE_12.3/
This package provide /usr/lib64/libjkyotocabinet.so.1.1.0 that is the library used by the kyotocabinet jar you can get from maven or the official site.
Looking for this lib I found that there is created a slink:
xxxx#xxxx:/usr/lib64> ls -al /usr/lib64/libjkyoto*
/usr/lib64/libjkyotocabinet.so.1 -> libjkyotocabinet.so.1.1.0
/usr/lib64/libjkyotocabinet.so.1.1.0
I just created a new slink without the ".1" at the end...
sudo ln -s libjkyotocabinet.so.1.1.0 libjkyotocabinet.so
/usr/lib64/libjkyotocabinet.so -> /usr/lib64/libjkyotocabinet.so.1.1.0
And all worked alright, seems that
System.loadLibrary("jkyotocabinet");
don't work if the library name is ended with something different to ".so"
Yes, you're missing something. Eclipse controls its own classpath, so whatever you set up in the environment outside Eclipse is likely not to have any effect.
You need to go into the properties for your project, find the "Build Path" settings and add the path to your tc.jar (or jars) to your build path there.
It may be easier to set up a /lib directory within your eclipse project, copy your tokyo jar there and add that to your build path. That way, it becomes part of your project (and can move from Eclipse installation to Eclipse installation) rather than being an external system dependency.