[cmake-developers] [CMake 0016102]: target_include_directories behaves differently on STATIC and SHARED libraries

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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https://cmake.org/Bug/view.php?id=16102 
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Reported By:                pboettch
Assigned To:                
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Project:                    CMake
Issue ID:                   16102
Category:                   CMake
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
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Date Submitted:             2016-05-12 18:09 EDT
Last Modified:              2016-05-12 18:09 EDT
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Summary:                    target_include_directories behaves differently on
STATIC and SHARED libraries
Description: 
Consider the following CMakeLists.txt:

  add_library(lib1 INTERFACE)
  target_include_directories(lib1 INTERFACE /lib1-dir)
 
  add_library(lib3 STATIC src3.c)
  target_include_directories(lib3 PUBLIC /lib3-dir)
  target_link_libraries(lib3 PRIVATE lib1)

  add_executable(exe1 exe.c)
  target_link_libraries(exe1 lib3)

Here lib3 is privately linking with lib1. However, during the compilation of
exe.c I see -I/lib1-dir is passed to gcc. 

When creating lib3 as a SHARED library it works as expected.

I understand that lib1 needs to be linked to exe1 if lib3 is STATIC and that
this not necessary when lib3 is SHARED.

However this logic does not apply for include_directories (or
compile-definitions and compile-options), which should, IMHO, never be passed on
if link is PRIVATE. Hence this bug-report.
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Issue History 
Date Modified    Username       Field                    Change               
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2016-05-12 18:09 pboettch       New Issue                                    
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