[cmake-developers] [CMake 0015118]: ExternalProject_Add SOURCE_DIR field overrides DOWNLOAD_DIR field

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://public.kitware.com/Bug/view.php?id=15118 
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Reported By:                Umar Arshad
Assigned To:                
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Project:                    CMake
Issue ID:                   15118
Category:                   CMake
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             2014-08-30 00:49 EDT
Last Modified:              2014-08-30 00:49 EDT
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Summary:                    ExternalProject_Add SOURCE_DIR field overrides
DOWNLOAD_DIR field
Description: 
Setting the SOURCE_DIR field forces the download of a repository to that
directory instead of the DOWNLOAD_DIR directory. This seems counter to what the
documentation suggest since the SOURCE_DIR field is under the configuration
section. This makes it difficult to add projects who's CMakeLists.txt files are
not in the root folder of the repository (i.e. clBLAS)

DOWNLOAD_DIR should be where the project is downloaded/cloned
SOURCE_DIR should be the location of the CMakeLists.txt file

Steps to Reproduce: 
# Set default ExternalProject root directory
set_directory_properties(PROPERTIES EP_PREFIX ${CMAKE_BINARY_DIR}/third_party)

ExternalProject_Add(
    clBlas
    GIT_REPOSITORY ssh://git@github.com/clMathLibraries/clBLAS.git
    GIT_TAG "v2.2"
    TIMEOUT 10
    DOWNLOAD_DIR ${CMAKE_BINARY_DIR}/third_party/src/clBlas
    SOURCE_DIR  ${CMAKE_BINARY_DIR}/third_party/src/clBlas/src
    CMAKE_ARGS  -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
                -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_DEBUG:PATH=DebugLibs
                -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_RELEASE:PATH=ReleaseLibs
                -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
                -DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS})

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Issue History 
Date Modified    Username       Field                    Change               
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2014-08-30 00:49 Umar Arshad    New Issue                                    
2014-08-30 00:49 Umar Arshad    File Added: BuildCLBLAS.cmake                   

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