Compiling Plugin for OSX

[hmacread]

Hi All,

First there is a problem that I'd like to remedy with the build scripts for the OpenCPN package in that it doesn't create the folder:

~/OpenCPN.app/Contents/PlugIns

But once this is created the plugins are found when the setting pane is open.

git clone https://github.com/seandepagnier/climatology_pi
cd climatology_pi/
mkdir build
cd build
cmake ..
make

Output from the cmake .. is as follows:

Hughs-MacBook-Pro:build hmacread$ cmake ..
-- The C compiler identification is AppleClang 6.0.0.6000054
-- The CXX compiler identification is AppleClang 6.0.0.6000054
-- 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
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- *** Staging to build climatology_pi ***
-- Found wxWidgets: TRUE  
-- Found OpenGL: /System/Library/Frameworks/OpenGL.framework  
-- Found OpenGL...
--     Lib: /System/Library/Frameworks/AGL.framework/System/Library/Frameworks/OpenGL.framework
--     Include: /System/Library/Frameworks/OpenGL.framework
-- Found Gettext: /usr/local/bin/msgmerge (found version "0.19.3") 
-- Found ZLIB: /usr/lib/libz.dylib (found version "1.2.5") 
-- Configuring done
CMake Warning (dev):
  Policy CMP0042 is not set: MACOSX_RPATH is enabled by default.  Run "cmake
  --help-policy CMP0042" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  MACOSX_RPATH is not specified for the following targets:

   climatology_pi

This warning is for project developers.  Use -Wno-dev to suppress it.

-- Generating done
-- Build files have been written to: /Users/hmacread/code/OpenCPN/currentbuild/plugins/climatology_pi/build

Include error from make:

[ 30%] Building CXX object CMakeFiles/climatology_pi.dir/src/ClimatologyOverlayFactory.cpp.o
In file included from /Users/hmacread/code/OpenCPN/currentbuild/plugins/climatology_pi/src/ClimatologyOverlayFactory.cpp:28:
In file included from /usr/local/include/wx-3.0/wx/wx.h:15:
In file included from /usr/local/include/wx-3.0/wx/object.h:19:
In file included from /usr/local/include/wx-3.0/wx/memory.h:15:
In file included from /usr/local/include/wx-3.0/wx/string.h:46:
/usr/local/include/wx-3.0/wx/strvararg.h:30:18: fatal error: 'tr1/type_traits' file not found
        #include <tr1/type_traits>
                 ^
1 error generated.

[CarCode]

Regarding strvararg.h you see:

#if defined(HAVE_TYPE_TRAITS)
#include <type_traits>
#elif defined(HAVE_TR1_TYPE_TRAITS)
#ifdef __VISUALC__
#include <type_traits>
#else
#include <tr1/type_traits>
#endif
#endif

So check your config.log build by configure for wxWidgets. You should see something like that:

configure:21689: checking type_traits usability
configure:21689: g++ -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -mmacosx-version-min=10.9 -c conftest.cpp >&5
configure:21689: $? = 0
configure:21689: result: yes
configure:21689: checking type_traits presence
configure:21689: g++ -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -mmacosx-version-min=10.9 -E conftest.cpp
configure:21689: $? = 0
configure:21689: result: yes
configure:21689: checking for type_traits
configure:21689: result: yes

#define HAVE_TYPE_TRAITS 1

There might be something wrong with your wxWidgets build I suppose.

Again my advise to Mac users: use Xcode and you have help anywhere. Cmake cannot offer this.

Gerhard

[merrimac]

The traits error occurs if you are trying to build for OSX 10.9 or 10.10 instead of 10.7.

Are you sure you configured wxWidgets with: ../configure --enable-unicode --with-osx-cocoa --with-macosx-sdk=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/ --with-macosx-version-min=10.7 --enable-aui --disable-debug --enable-opengl --without-liblzma

and have set

export MACOSX_DEPLOYMENT_TARGET=10.7

before running cmake ../

as instructed on Compiling - Mac OS X | Official OpenCPN Homepage ?

Note that in Xcode I still needed to go to the Project settings and change the deployment target in the UI to 10.7, even when the project was generated for 10.7.

[merrimac]

Now that I have built my plugin, I ran into the next problem -- the plugin has dependencies on /usr/local/lib/wx*.dylib, but they should be relative to the package path.

For now I'm using install_name_tool to fix up the library after building, but shouldn't this be part of the make process?

for i in `otool -L libbr24radar_pi.dylib | awk '/\/usr\/local\/lib/ { print $1; }'`; do echo $i; install_name_tool -change $i @executable_path/../MacOS/`echo $i | sed 's/3.0.dylib/3.0.0.3.0.dylib/'`; done

[rgleason]

That's great you are compiling plugin Climatology, I hope it works out. Please record your steps here and in the development manual for others, so that the process can be repeated and improved. Thanks.