cottsay / openelp

Open Source EchoLink Proxy

OpenELP, an Open Source EchoLink Proxy

OpenELP is an open source EchoLink proxy for Linux and Windows. It aims to be efficient and maintain a small footprint, while still implementing all of the features present in the official EchoLink proxy.

OpenELP also has the ability to bind to multiple network interfaces which are routed to unique external IP addresses, and therefore is capable of accepting connections from multiple clients simultaneously.

Prerequisites

To build OpenELP you will need:

• CMake
• pkg-config
• GCC or Visual Studio

If available, OpenELP can use:

• PCRE2
• OpenSSL
• Doxygen

If your system doesn't have PCRE2 development files installed, you have the option of bundling PCRE2 with OpenELP. To do this, specify -DOPENELP_BUNDLE_PCRE:BOOL=ON when you call cmake. CMake will download the PCRE2 sources automatically and build them into the OpenELP library.

To create a Windows installer, you will also need to install NSIS

The only runtime dependency that OpenELP has is on the PCRE2 shared library, unless PCRE2 was bundled into OpenELP.

To install these prerequisites on Fedora (23+) and CentOS/RHEL (6+ w/EPEL), run:

sudo yum install cmake doxygen gcc pcre2-devel pkgconfig openssl-devel

Compiling

Linux:

mkdir build && cd build
cmake ..
make

Windows:

mkdir build && cd build
cmake .. -DOPENELP_BUNDLE_PCRE:BOOL=ON
devenv openelp.sln /build

Windows Installer:

devenv openelp.sln /project PACKAGE /build

License

See LICENSE file.

EchoLink® is a registered trademark of Synergenics, LLC.

Bugs

All issues and feature requests should be directed to the bug tracker. Please review any open issues before filing new ones.

openelp's Issues

Issues building on Ubuntu Server 15.04

I added libpcre3-dev and cmake, cloned the repo, then tried to build as recommended. No luck :(

Patrick@Ubuntu-1504-1:~/OpenELP/openelp/build$ cmake ..
CMake Error at /usr/share/cmake-3.0/Modules/FindPackageHandleStandardArgs.cmake:136 (message):
  Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
Call Stack (most recent call first):
  /usr/share/cmake-3.0/Modules/FindPackageHandleStandardArgs.cmake:343 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.0/Modules/FindPkgConfig.cmake:168 (find_package_handle_standard_args)
  CMakeLists.txt:91 (find_package)


-- Configuring incomplete, errors occurred!
See also "/home/Patrick/OpenELP/openelp/CMakeFiles/CMakeOutput.log".

Building in Centos 7.1 - also can't get PCRE 2.8

I tried setting up the prerequisites:

sudo yum install cmake doxygen pcre-devel gcc subversion

That still doesn't get a compatible PCRE 2.8 on Centos 7.1.

[Patrick@plang-ducp-c1 build]$ cmake ..
-- The C compiler identification is GNU 4.8.5
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.27.1")
-- checking for module 'libpcre2-8'
--   package 'libpcre2-8' not found
CMake Error at /usr/share/cmake/Modules/FindPkgConfig.cmake:279 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/share/cmake/Modules/FindPkgConfig.cmake:333 (_pkg_check_modules_internal)
  CMakeLists.txt:92 (pkg_check_modules)


-- Found Doxygen: /usr/bin/doxygen (found version "1.8.5")
-- Configuring incomplete, errors occurred!

If I try to use static PCRE 2.8, it fails building PCRE itself:

[Patrick@plang-ducp-c1 openelp]$ cmake .. -DOPENELP_BUNDLE_PCRE:BOOL=ON
CMake Error: The source directory "/home/Patrick" does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.
[Patrick@plang-ducp-c1 openelp]$ cd build/
[Patrick@plang-ducp-c1 build]$ rm -rf *
[Patrick@plang-ducp-c1 build]$ cmake .. -DOPENELP_BUNDLE_PCRE:BOOL=ON
-- The C compiler identification is GNU 4.8.5
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Found Subversion: /usr/bin/svn (found version "1.7.14")
-- Found Doxygen: /usr/bin/doxygen (found version "1.8.5")
-- Configuring done
-- Generating done
-- Build files have been written to: /home/Patrick/openelp/build
[Patrick@plang-ducp-c1 build]$ make
Scanning dependencies of target pcre
[  3%] Creating directories for 'pcre'
[  7%] Performing download step (SVN checkout) for 'pcre'
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 U   pcre
Checked out revision 498.
[ 11%] No patch step for 'pcre'
[ 15%] Performing update step (SVN update) for 'pcre'
Updating '.':
At revision 498.
[ 19%] Performing configure step for 'pcre'
-- The C compiler identification is GNU 4.8.5
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
CMake Error at CMakeLists.txt:78 (CMAKE_POLICY):
  Policy "CMP0026" is not known to this version of CMake.


-- Could NOT find BZip2 (missing:  BZIP2_LIBRARIES BZIP2_INCLUDE_DIR)
-- Could NOT find ZLIB (missing:  ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
-- Could not find OPTIONAL package Readline
-- Could not find OPTIONAL package Editline
-- Looking for dirent.h
-- Looking for dirent.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for inttypes.h
-- Looking for inttypes.h - found
-- Looking for sys/stat.h
-- Looking for sys/stat.h - found
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for unistd.h
-- Looking for unistd.h - found
-- Looking for windows.h
-- Looking for windows.h - not found
-- Looking for bcopy
-- Looking for bcopy - found
-- Looking for memmove
-- Looking for memmove - found
-- Looking for strerror
-- Looking for strerror - found
--
--
-- PCRE2 configuration summary:
--
--   Install prefix .................. : /usr/local
--   C compiler ...................... : /usr/bin/cc
--   C compiler flags ................ : -I/home/Patrick/openelp/build/pcre-prefix/src/pcre/src
--
--   Build 8 bit PCRE2 library ....... : ON
--   Build 16 bit PCRE2 library ...... : OFF
--   Build 32 bit PCRE2 library ...... : OFF
--   Enable JIT compiling support .... : OFF
--   Enable Unicode support .......... : ON
--   Newline char/sequence ........... : LF
--   \R matches only ANYCRLF ......... : OFF
--   EBCDIC coding ................... : OFF
--   EBCDIC coding with NL=0x25 ...... : OFF
--   Rebuild char tables ............. : OFF
--   Use heap recursion .............. : OFF
--   Internal link size .............. : 2
--   Parentheses nest limit .......... : 250
--   Match limit ..................... : 10000000
--   Match limit recursion ........... : MATCH_LIMIT
--   Build shared libs ............... : OFF
--   Build static libs ............... : ON
--   Build pcre2grep ................. : OFF
--   Enable JIT in pcre2grep ......... : ON
--   Buffer size for pcre2grep ....... : 20480
--   Build tests (implies pcre2test  . : OFF
--                and pcre2grep)
--   Link pcre2grep with libz ........ : Library not found
--   Link pcre2grep with libbz2 ...... : Library not found
--   Link pcre2test with libeditline . : Library not found
--   Link pcre2test with libreadline . : Library not found
--   Support Valgrind .................: OFF
--
-- Configuring incomplete, errors occurred!
make[2]: *** [pcre-prefix/src/pcre-stamp/pcre-configure] Error 1
make[1]: *** [CMakeFiles/pcre.dir/all] Error 2
make: *** [all] Error 2
[Patrick@plang-ducp-c1 build]$