[joltphysics] Add shared lib as build option

[Bruno S Marques (bmarques1995)]

Continues #53241

[Billy O'Neal (BillyONeal)]

In general, please try to avoid closing and reopening PRs with the same content, it makes following comments back to where they came from difficult.

In addition, GPT 5.6 Sol reports:

• The Windows shared package only links when consumers receive JPH_SHARED_LIBRARY. The exported CMake target supplies it, but directly including include/ and linking lib/Jolt.lib produces unresolved allocator and Factory::sInstance symbols in both Release and Debug. The required direct-link integration may not rely on an extra build-system macro; the installed headers/package layout must make this usage work.
• Normalize ports/joltphysics/portfile.cmake to LF. It is CRLF-only, and git diff --check origin/master...HEAD reports both added lines as trailing whitespace.

Would you consider merging bmarques1995#1 ?

[Bruno S Marques (bmarques1995)]

In general, please try to avoid closing and reopening PRs with the same content, it makes following comments back to where they came from difficult.

In addition, GPT 5.6 Sol reports:

• The Windows shared package only links when consumers receive JPH_SHARED_LIBRARY. The exported CMake target supplies it, but directly including include/ and linking lib/Jolt.lib produces unresolved allocator and Factory::sInstance symbols in both Release and Debug. The required direct-link integration may not rely on an extra build-system macro; the installed headers/package layout must make this usage work.
• Normalize ports/joltphysics/portfile.cmake to LF. It is CRLF-only, and git diff --check origin/master...HEAD reports both added lines as trailing whitespace.

Would you consider merging bmarques1995#1 ?

Okay, i tried to merge the changes, bad idea

[Kai Pastor (dg0yt)]

Upstream JPH_BUILD_SHARED_LIBS defaults to BUILD_SHARED_LIBS, so the extra option is not needed at all after changing vcpkg_check_linkage.
https://github.com/jrouwe/JoltPhysics/blob/e77f175595e64cb44218cc9d9d56fc365ad0e36a/Build/CMakeLists.txt#L30

[Kai Pastor (dg0yt)]

Suggested change

string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "dynamic" JPH_BUILD_SHARED_LIBS)

[Kai Pastor (dg0yt)]

Suggested change

-DJPH_BUILD_SHARED_LIBS=${JPH_BUILD_SHARED_LIBS}