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Member "plplot-5.15.0/doc/wiki_source/Building_PLplot_with_a_cross-compiler" (1 Jun 2019, 4101 Bytes) of package /linux/misc/plplot-5.15.0.tar.gz:


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    1 <!---
    2 N.B.  The definitive Markdown source of this file is located in the
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    8 with your favorite file editor, and delete used to remove extraneous
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   11 -->
   12 
   13 From version 2.6.0 cmake includes support for cross-compiling. The [CMake wiki](http://www.cmake.org/Wiki/CMake_Cross_Compiling) provides a useful source of background information here.
   14 
   15 Cross-compiling plplot is complicated because a full build involves lots of external libraries for different drivers and multiple different compilers /interpreters for the language bindings. However, it is possible to build a cut-down version of PLplot using cmake. PLplot compiles and runs several executables to create source files / data for the project at build time. Obviously it is not generally possible to run the cross-compiled versions and so access is also required to a native build tree in which to find the native versions of the build-time executables. Support for this was only added to PLplot on 3rd March 2009 (svn revision 9665).
   16 
   17 The following instructions were written and tested on using the mingw32 cross-compiler for Windows running under Linux. Debian and Ubuntu supply packages for this environment so it is simple to install and test.
   18 
   19 Build a native version of PLplot
   20 --------------------------------
   21 
   22 This can just be a normal PLplot build. The only thing to be careful of it to ensure that it uses dynamic drivers if you intend to use them for the cross compiler otherwise get-drv-info will not be built.
   23 
   24 Create a CMake toolchain
   25 ------------------------
   26 
   27 See the [CMake wiki](http://www.cmake.org/Wiki/CMake_Cross_Compiling) for details of this for individual platforms. The mingw32 example worked fine for me.
   28 
   29 Building a cross-compiled version of PLplot
   30 -------------------------------------------
   31 
   32 -   Create a new directory for the cross-compile build and change to that directory.
   33 -   Run cmake.
   34 
   35 <!-- -->
   36 
   37 -   -   You probably want to disable all languages and drivers by default and then just enable the ones you need. You can achieve this by setting DEFAULT_NO_DEVICES=ON and DEFAULT_NO_BINDINGS=ON. Failure to do this can lead to strange results if cmake picks up native rather than cross-compiler versions of tools, for example the fortran compiler, which are not part of your toolchain.
   38     -   You will need to set the following CMake variables.
   39         -   CMAKE_TOOLCHAIN_FILE: points to the CMake toolchain file for this cross-compiler.
   40         -   CMAKE_NATIVE_BINARY_DIR: points to the top-level directory in the native PLplot build tree.
   41     -   You will need to disable pkg-config support or ensure that pkg-config is using the correct package information files for the cross-platform. The simplest way of disabling this is by setting PKG_CONFIG_EXECUTABLE to something like NOT-FOUND.
   42     -   You will either need to disable support for the CSA library, or explicitly set NanAwareCCompiler (probably to ON) since this uses a build-time executable to check for support. This can't be executed for a cross-compiled environment.
   43 
   44 <!-- -->
   45 
   46 -   Run make to build the cross-compiled version of PLplot.
   47 
   48 Using this method I have successfully cross-compiled the C++ bindings and the ps and svg drivers. Note that neither of these has external dependencies. For reference the cmake command line looked like
   49 
   50 `cmake -DCMAKE_TOOLCHAIN_FILE=~/Toolchain-mingw32.cmake -DDEFAULT_NO_DEVICES=ON -DPLD_ps=ON -DPLD_svg=ON -DPKG_CONFIG_EXECUTABLE=Not-Found -DDEFAULT_NO_BINDINGS=ON -DENABLE_cxx=ON -DNaNAwareCCompiler=ON -DCMAKE_NATIVE_BINARY_DIR=/home/andrew/software/plplot/build`
   51 `../plplot`
   52 
   53 
   54 The content of this page is available under the [GNU Free Documentation License 1.2](http://www.gnu.org/copyleft/fdl.html).