[cmake-developers] [CMake 0016078]: CMake on Cygwin with clang not creating expected dll.a

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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https://cmake.org/Bug/view.php?id=16078 
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Reported By:                Thomas Nilsson
Assigned To:                
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Project:                    CMake
Issue ID:                   16078
Category:                   CMake
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             2016-04-24 04:28 EDT
Last Modified:              2016-04-24 04:28 EDT
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Summary:                    CMake on Cygwin with clang not creating expected
dll.a
Description: 
I'm building a shared library and an application using that lib on Cygwin. With
GCC CMake creates a .dll.a to use when linking. Switching to clang I get

[ 34%] Built target xyz_shared
make[2]: *** No rule to make target 'src/libxyz_shared.dll.a', needed by
'xyz.exe'.  Stop.


Steps to Reproduce: 
On Cygwin, use the attached CMakeLists.txt and see it produce
'cygxyz_shared.dll' and 'libxyz_shared.dll.a'.

Clear the build directory and do

  $ CC=clang cmake ..; make

and it will not create 'libxyz_shared.dll.a'.

Additional Information: 
As described in this Stackoverflow question
(http://stackoverflow.com/questions/36294199) the culprit seems to be the lack
of the flags '-Wl,--enable-auto-import' when using clang.
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Issue History 
Date Modified    Username       Field                    Change               
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2016-04-24 04:28 Thomas Nilsson New Issue                                    
2016-04-24 04:28 Thomas Nilsson File Added: CMakeLists.txt                    
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