In the toplevel CMakeLists.txt there is this clause(line 497-512) to remove the
check for certain image libraries on OSX.
# Image readers/writers depend on 3rd party libraries except for OS X which
# can use Quicktime.
IF(NOT APPLE)
FIND_PACKAGE(GIFLIB)
FIND_PACKAGE(JPEG)
FIND_PACKAGE(PNG)
FIND_PACKAGE(TIFF)
# QuickTime is required for OS X, but optional for Windows.
IF(WIN32)
FIND_PACKAGE(QuickTime)
ENDIF()
ELSE()
FIND_PACKAGE(QuickTime)
ENDIF()
The problem is that when compiling with 64-bit support, we need to use imageio
instead of quicktime. There is a comment in there that talks about 2
approaches.
# Platform specific:
# (We can approach this one of two ways. We can try to FIND everything
# and simply check if we found the packages before actually building
# or we can hardcode the cases. The advantage of the former is that
# packages that are installed on platforms that don't require them
# will still get built (presuming no compatibility issues). But this
# also means modules that are redundant may get built. For example,
# OS X doesn't need GIF, JPEG, PNG, TIFF, etc because it uses QuickTime.
# Also, it will clutter the CMake menu with "NOT_FOUND".
# The downside to the latter is that it is harder to build those
# potentially redundant modules.)
I would like to propose we switch to the former approach. I can see 64-bit
compilation being more prevalent going forward.
Thoughts?
Chuck_______________________________________________
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