Hello,
I have been trying to get PLplot to build under MSYS on Windows
(FYI: MSYS is the Linux/UNIX-like environment for MinGW), but
so far I have failed. The reason is that CMake picks up the
MS Visual C/C++ import libraries for the system libraries gdi32.dll
and comgdi32.dll.
Here is my analysis:
- The variable MSYS should be set to 1 (true) if CMake is running
under MSYS, but it is not. MinGW is set to true.
So I now check that the environment variable OSTYPE is set to
"msys" to detect if it is running under MSYS.
- In wingcc.cmake, we have code to look for the gdi32 and comgdi32
libraries via find_library and useful hints via MINGWLIBPATH.
So to support MSYS, I set MINGWLIBPATH to the correct MSYS library
path (merely extending the condition in plplot.cmake)
- The effect of these changes is strange though:
- The build scripts seem to be set up for building PLplot as
static libraries with static drivers (everything is concentrated
in the src subdirectory
- The build.cmake file contains dependencies to the MSVC import
libraries (gdi32.lib and comgdi32.lib), not to the MSYS libraries
(libgdi32.a and libcomgdi32.a).
The reason for this may be that CMake on Windows does not recognise
the libxxx.a pattern for libraries. A workaround is to force these
libraries to be used, but perhaps there is a better way?
The first effect, however, is more worrisome. My guess is that we
do not yet have propagated all build options for this platform.
I will try to sort this one out in the coming days.
Regards,
Arjen
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