Change framework.lib from object to static lib.

[asuessenbach]

Description

Changing the framework.lib from object to static reduces the size of each samples lib from about 300MB to about 25MB.

Build tested on Win11 with VS2026. Run tested on Win11 with NVidia GPU.

Fixes #1555

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[SaschaWillems]

Also see #1561 which gets build size down to ~18 GByte for me. What's the size with this one? If this also lowers it, I could adopt this to my PR.

[asuessenbach]

which gets build size down to ~18 GByte for me

I don't see anything small like this.
With the framework.lib as OBJECT and the per-sample libs as STATIC (the current situation in main), my build directory is 60.6 GB.
With this change only (all libs as STATIC), I have 27.3 GB.
With your change only (all libs as OBJECT), I have 30.1 GB.
With both changes (framework.lib as STATIC, per-sample libs as OBJECT), I have 30.3 GB.

That is by just switching the framework.lib to STATIC (this PR) I get the best size reduction.
Plus: no need to distinguish between local and CI build.

@SaschaWillems Could you please check the sizes with your environment as well?

[asuessenbach]

... as a side note: when I try to change the framework.lib to shared, I get unresolved externals of 2 functions, that would be resolved from apps.cpp. But that file is cmake-generated into the build tree.
To resolve that would require some more in-depth investigations...

[SaschaWillems]

Welp. Ignore my PR. I forgot that I only had a few samples enabled, so size change wasn't what I thought it would be.

[gpx1000]

#1563 <-- I'm doing a few things here to address this issue. Would you test how much we save by using this version? Basically I'm looking to make a few changes to the build flags, switch to static libs and remove the .obj files once they get into the .libs. This combo should keep sccache working, keep debugging symbols available, and dramatically reduce the size of the build folder in Windows by removing duplicated debug symbols.

[asuessenbach]

Would you test how much we save by using this version?

@gpx1000 I get the same reduction (more than 30GB) as with this PR. Probably because it's the switch from OBJECT to STATIC for the framework.lib. None of your other changes in #1563 seem to happen with my build environment.

[gpx1000]

@asuessenbach, if you get a chance, give it another try, I had the cmake looking for my build setup and not all msvc setups... opps.

[asuessenbach]

@gpx1000 I don't see any additional size reduction with your latest changes.

And, by the way, I don't see anything at "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${TARGET_NAME}.dir".
Maybe you wanted to remove files at "${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.dir"?

[tomek-brcm]

Builds fine on Linux, no regressions.