[Scons-users] Second build of target omitting source file from compiler invocation on Windows

[Andrew C. Morrow]

I am experiencing a puzzling build issue, only on Windows, when using SCons
2.3.0.

The first time I build the target, it builds correctly. But the second time
I build the target (which has AlwaysBuild applied, so this is not a no-op),
the source file name is strangely omitted from the compiler invocation.

First invocation of build (from a clean tree), results in this command,
which succeeds:

cl /Fobuild\xxx\include_dbclienth_test.obj /c
src\mongo\client\include_dbclienth_test.cpp /TP /nologo /EHsc /W3 /wd4355
/wd4800 /wd4267 /wd4244 /wd429
0 /we4099 /Z7 /errorReport:none /MTd /O2 /Oy-
/IC:\cygwin\home\andrew\Documents\10gen\dev\opt\include
/Ibuild\xxx\third_party\gtest-1.7.0\include /Isr
c\third_party\gtest-1.7.0\include /Ibuild\xxx\third_party\snappy
/Isrc\third_party\snappy /Ibuild\xxx\third_party\libstemmer_c\include
/Isrc\third_par
ty\libstemmer_c\include /Ibuild\xxx\third_party\s2 /Isrc\third_party\s2
/Ibuild\xxx\third_party\pcre-8.30 /Isrc\third_party\pcre-8.30
/IC:\local\boost
_1_55_0 /IC:\cygwin\home\andrew\Documents\10gen\dev\src\winpcap\Include /Z7

Second invocation results in the following command, which fails:

cl /Fobuild\xxx\include_dbclienth_test.obj /c /TP /nologo /EHsc /W3 /wd4355
/wd4800 /wd4267 /wd4244 /wd4290 /we4099 /Z7 /errorReport:none /MTd /O2 /Oy
- /IC:\cygwin\home\andrew\Documents\10gen\dev\opt\include
/Ibuild\xxx\third_party\gtest-1.7.0\include
/Isrc\third_party\gtest-1.7.0\include /Ibuild\xx
x\third_party\snappy /Isrc\third_party\snappy
/Ibuild\xxx\third_party\libstemmer_c\include
/Isrc\third_party\libstemmer_c\include /Ibuild\xxx\third_pa
rty\s2 /Isrc\third_party\s2 /Ibuild\xxx\third_party\pcre-8.30
/Isrc\third_party\pcre-8.30 /IC:\local\boost_1_55_0
/IC:\cygwin\home\andrew\Documents\10
gen\dev\src\winpcap\Include /Z7
cl : Command line error D8003 : missing source filename

Note that the second command does not reference the
include_dbclienth_test.cpp file after the '/c' switch.

Current environment is 64-bit Windows 7, VS2013 Express, using the x64
cross tools shell to work around the missing VS2013 support in 2.3.0.

If you would like to try to reproduce:


> git clone https://github.com/mongodb/mongo-cxx-driver.git

> git checkout legacy

> scons --variant-dir=xxx --full --dbg=on --opt=on --64

--prefix=<somewhere> --use-system-boost --cpppath=C:\local\boost_1_55_0
--libpath=C:\local\boost_1_55_0\lib64-msvc-12.0 check-install-mongoclient

You will need to have the prebuilt boost binaries installed somewhere,
update the build line above as needed.

This target works as expected on Linux and OSX.

Any suggestions or ideas?

Thanks,
Andrew
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