[Scons-users] Changes in linker options don't rebuild SharedLibrary

[Francis Bolduc]

It should re-link.

I've never used the no_import_lib bit, though. And your example does not
have any exported symbols. Maybe there is interference between these two
states.

My suggestion is to try exporting a symbol (declspec dllexport) and
removing the no_import_lib bit.



--
Francis Bolduc, B.Sc.


On Mon, Dec 16, 2013 at 4:50 PM, Jason Swager <jswager at alohaoi.com> wrote:


> Hello,

> I've encountered what seems to be a rather serious problem in SCONS

> linking.  I'm hoping that I'm just doing something stupid or misconfigured

> something, but something seems wrong.  What I'm finding is that changing

> the linking options won't cause a rebuild of a shared library if it has

> already been built.  Here are the details of the my situation...

>

> SCons 2.3.  Visual Studio 2010.  Windows 7 64bit machine.

>

> The DLL I'm compiling is REAL simple (SomeDLL.cpp):

>

> int hello()

> {

>     return 0;

> }

>

> The SConstruct is also very simple:

>

> env=Environment(tools=['default'], MSVC_VERSION='10.0', TARGET_ARCH =

> 'x86', no_import_lib='1')

> env.AppendUnique(SHLINKFLAGS=['/FORCE'])  #

> env.SharedLibrary(target='SomeDLL.dll', source=['SomeDLL.cpp'])

>

> Running this once, the DLL gets built.  Run it a second time, nothing gets

> built because nothing has changed.  If I comment out the second line (the

> SHLINKFLAGS modification), then run "scons" again, nothing gets rebuilt.

>  Adding/removing that line should have caused a relink.

>

> I also tried changing LINKFLAGS and even LIBS, but modifications to those

> construction variables didn't cause a relink.

>

> Just for reference, changes to compilation flags CXXFLAGS, CPPPATH,

> CCFLAGS would cause a rebuild of the CPP file, resulting in a relink of the

> DLL.  But changes to the linker options seem to be ignored.

>

> Am I doing something wrong?

> Thanks,

> Jason Swager

>

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