I have a project with a chain of external libraries and some of the
dependencies depend on each other as options
meaning
project uses
LIB A,
LIB B
LIB B can use as option LIB C
my project then needs to inquire LIB B to see if LIB C was included (to link
with LIB C)
I do this like this
message("-- Detecting if HDF5 library ${HDF5_LIBRARY} needs the ZLIB
library...")
check_library_exists(${HDF5_LIBRARY} H5Z_DEFLATE "" NEED_ZLIB)
here LIB B = HDF5_LIBRARY
LIB C = the zlib library
this works with no problems in Linux.
However in Visual Studio , this detection only works if I manually set in the
generated project
the option
"Link Library Dependencies"
to include LIB C (the zlib library)
these lines get added to the generated Visual Studio project
<Lib>
<AdditionalOptions>%(AdditionalOptions) /machine:x64</AdditionalOptions>
<AdditionalDependencies>I:\nco\cmake\zlib\build\Debug\zlibstaticd.lib;I:\nco\cmake\szip\build\bin\Debug\libszip_D.lib</AdditionalDependencies>
</Lib
Is there a way that I can set this in the CMake script?
these comments show the problem
#HDF5 can be optionally linked with the SZIP library (Science Data Lossless
Compression Program) and ZLIB
#Symbol to detect in ZLIB can be only H5Z_DEFLATE, a structure only defined in
H5Zdeflate.c if the filter is enabled
#For SZIP the structure can be only H5Z_SZIP, defined in H5Zszip.c if the
filter is enabled
#check_library_exists() tries to link a temporary program with these symbols
#On MSVC for this detection to work, the HDF5 library MUST HAVE as additional
dependencies the ZLIB and SZIP libraries,
#which is not a requirement for the library to build successfully
to reproduce the problem, this is the project
https://github.com/nco/nco/tree/master/cmake
on a windows Win64 developer shell
git clone https://github.com/nco/nco
cd cmake
clone.bat
bld.bat
this will git clone and build dependencies, but there will be linking errors
because the ZLIB (and SZIP) libraries
were not correctly identified as needed
thanks
----------------------
Pedro Vicente
http://www.space-research.org/
http://pedro-vicente.net/
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