[BUG] Catch2 not rebuilt when switching toolchain from :msvc to :debug:msvc

[david-bakin]

Windows 10, VS2022, dds 0.1.0-alpha.6

Running through the tutorial I got to the end where strings.test.cpp was built using the Catch2 framework (via test_driver). Built using dds build -t :msvc: worked fine.

Then ran dds build -t :debug:msvc and got a link fail because apparently Catch2 was not rebuilt with debug flags - expected behavior was that Catch2 would be rebuilt with the debug flags per the spec which says dds ensures that everything is built with the same compiler flags.

R:\BBits\dds-tutorial>dds build -t :debug:msvc
[info ] [tutorial/tutorial-hello] Compile: hello\strings.test.cpp
[info ] [tutorial/tutorial-hello] Compile: hello-world.main.cpp
[info ] [tutorial/tutorial-hello] Compile: hello\strings.cpp
[info ] [tutorial/tutorial-hello] Compile: hello\strings.cpp -     717ms [1/3]
[info ] [tutorial/tutorial-hello] Compile: hello-world.main.cpp -     800ms [2/3]
[info ] [tutorial/tutorial-hello] Compile: hello\strings.test.cpp -    1053ms [3/3]
[info ] Compilation completed in 1329ms
[info ] [tutorial/tutorial-hello] Archive: libtutorial-hello.lib
[info ] [tutorial/tutorial-hello] Archive: libtutorial-hello.lib - 33ms
[info ] Archiving completed in 44ms
[info ] [tutorial/tutorial-hello] Link: hello-world.exe
[info ] [tutorial/tutorial-hello] Link: test\hello\strings.exe
[info ] [tutorial/tutorial-hello] Link: test\hello\strings.exe         -    728ms
[info ] [tutorial/tutorial-hello] Link: hello-world.exe                -   1325ms
[error] Failed to link executable [R:\BBits\dds-tutorial\_build\test\hello\strings.exe]. Link command was [cl.exe /nologo /EHsc "\\p70-host\repos-srcs\BBits\dds-tutorial\_build\obj\hello\strings.test.cpp.obj" "_build\libtutorial-hello.lib" "\\p70-host\repos-srcs\BBits\dds-tutorial\_build\_test-driver\v1\catch2\catch-main.cpp.obj" "/Fe_build\test\hello\strings.exe" /MTd /Z7] [Exited 2], produced output:
catch-main.cpp.obj : error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL': value '0' doesn't match value '2' in strings.test.cpp.obj
catch-main.cpp.obj : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MT_StaticRelease' doesn't match value 'MTd_StaticDebug' in strings.test.cpp.obj
LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library
_build\test\hello\strings.exe : fatal error LNK1319: 2 mismatches detected

[error] Linking a runtime binary (executable/shared library/DLL) failed
[error]
Linking a runtime binary file failed. There are a variety of possible causes
for this error. Refer to the documentation for more information.

[error] Refer: https://vector-of-bool.github.io/docs/dds/err/link-failure.html

Deleting _build and rebuilding clean did in fact work fine.