Dear all,
I am trying to build shared libraries on Windows exporting all symbols. This
is as an alternative of instrumenting the code with dllimport/dllexport
declarations. For this I do build first a static library from which I get all
the defined symbols to write a .DEF file which is then used to build the shared
library. The CMake code (using version 2.8.3) looks like this:
add_library( ${library}-static STATIC ${sources} )
add_custom_command( OUTPUT {library}.def COMMAND <using ${library}-static>
DEPENDS ${library}-static )
add_library(${library} SHARED ${library}.def)
target_link_libraries(${library} ${library}-static ${other-libs} )
set_target_properties(${library} PROPERTIES LINK_INTERFACE_LIBRARIES
${other-libs})
This works just fine when using the nmake generator. The library is created
and has all the symbols are exported as desired. But, when using Visual C++
2008 express edition I get the following error message:
1>.\mylib.dir\Debug\mylib.dll.intermediate.manifest : general error c1010070:
Failed to load and parse the manifest. The system cannot find the file
specified.
The problem is that the shared library has been defined without any 'real'
source file (only the .def file is declared) and somehow the generated code
does not produce the required manifest file. Does anybody see a problem with
these kind of constructs? Should it just work from within the IDE?
Experimentally I have found a workaround, which consists in adding a dummy
source file in the shared library definition.
...
file( WRITE ${library}.cpp "// empty file!!!\n" )
add_library( ${library} SHARED ${library}.cpp ${library}.def)
...
I have also noticed that the dependency of the shared library to the .def file
is also missing. This is, newer versions of the .def file does not trigger a
re-build of the shared library.
-------------------------------------------------------------
Pere Mato CERN, PH Department, CH 1211 Geneva 23, Switzerland
e-mail: [email protected] tel: +41 22 76 78696
fax: +41 22 76 68792 gsm: +41 76 48 70855
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