Linking Jolt with Makefile and Visual Studio Code

[eashaankumar]

I am trying to add Jolt as a static library using Makefile.

I built the Jolt project with cmake_vs2022_cl_double and went into Visual Studio and ensured that the Jolt project was set to Static Library mode and Debug mode. The project built successfully and produced Jolt.lib and Jolt.pbd. I linked to these files in my Makefile with -l and used the correct libs path with -L (I think). But for some reason I keep getting mingw32/bin/ld.exe: Undefined reference to JPH::Shape and various other JPH classes. This is weird because this same Makefile has worked on other libraries such as vulkan, sdl2, glfw, etc. So can somebody tell me what I am doing wrong?

Im on Windows and trying to develop in Visual Studio Code.

Makefile:
`
CXX = g++
CXXFLAGS = -std=c++23 -Wall -pedantic-errors -DDEBUG -g -Wno-unknown-pragmas

APP = test

SRCS = ${APP}/src/*.cpp

LIBSDIR = -LC:\Users\seana\dev\CppPrjs\CaraEngineDev\stoopid\dependencies\libs
LIBS = -lJolt

HEADERS = -IC:\Users\seana\dev\CppPrjs\JoltPhysics

app: ${APP}/src/*.cpp
${CXX} ${CXXFLAGS}
${HEADERS}
${SRCS}
-L/usr/local/lib -Lstdlib ${LIBSDIR} ${LIBS}
-o ${APP}
`

c:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\seana\AppData\Local\Temp\ccOk0QK4.o:main.cpp:(.rdata$.refptr._ZTVN3JPH5ShapeE[.refptr._ZTVN3JPH5ShapeE]+0x0): undefined reference tovtable for JPH::Shape'
c:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\seana\AppData\Local\Temp\ccOk0QK4.o:main.cpp:(.rdata$.refptr._ZN3JPH5TraceE[.refptr._ZN3JPH5TraceE]+0x0): undefined reference to JPH::Trace' c:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\seana\AppData\Local\Temp\ccOk0QK4.o:main.cpp:(.rdata$.refptr._ZN3JPH4FreeE[.refptr._ZN3JPH4FreeE]+0x0): undefined reference to JPH::Free'
collect2.exe: error: ld returned 1 exit status
make: *** [Makefile:14: app] Error 1`

[jrouwe]

I'm not sure if libraries compiled with g++ through mingw are compatible with those compiled with CL (Visual Studio compiler). I would try compiling Jolt with cmake_windows_mingw.sh instead.

Also there's a (big) chance that you have mismatching preprocessor defines. Compile Jolt using make -n to see what defines it is passing (they're prefixed by JPH_). E.g. the undefined reference to Free could come from a mismatch in the JPH_DISABLE_CUSTOM_ALLOCATOR preprocessor define because in one case it's a function and in the other case a function pointer.

[eashaankumar]

compiling with cmake_windows_mingw.sh didn't work. Im getting the same errors.

I dont know much about pre-processor defines (new to c++). make -n spits out

"C:\Program Files\CMake\bin\cmake.exe" -SC:\Users\seana\dev\CppPrjs\JoltPhysicsBuild -BC:\Users\seana\dev\CppPrjs\JoltPhysics\Build\MinGW_Debug --check-build-ystem CMakeFiles\Makefile.cmake 0 "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_start C:\Users\seana\dv\CppPrjs\JoltPhysics\Build\MinGW_Debug\CMakeFiles C:\Users\seana\dev\CppPrjs\JltPhysics\Build\MinGW_Debug\\CMakeFiles\progress.marks C:/MinGW/bin/make.exe -s -f CMakeFiles\Makefile2 all C:/MinGW/bin/make.exe -s -f CMakeFiles\Jolt.dir\build.make CMakeFiles/Jolt.dir/epend

It don't know what this means. I will learn and come back to you.

[jrouwe]

Ah on my machine I needed:

cmake --build . -v

which on my machine prints e.g.:

C:\msys64\mingw64\bin\c++.exe -DJPH_DEBUG_RENDERER -DJPH_OBJECT_STREAM -DJPH_PROFILE_ENABLED -DJPH_USE_AVX -DJPH_USE_AVX2 -DJPH_USE_F16C -DJPH_USE_FMADD -DJPH_USE_LZCNT -DJPH_USE_SSE4_1 -DJPH_USE_SSE4_2 -DJPH_USE_TZCNT -D_DEBUG @CMakeFiles/Jolt.dir/includes_CXX.rsp -Wall -Werror -g -fno-rtti -fno-exceptions -Wno-stringop-overflow -Wno-psabi -ffp-contract=off -std=c++17 -mavx2 -mbmi -mpopcnt -mlzcnt -mf16c -mfma -mfpmath=sse -Winvalid-pch etc. etc. etc.

so in that case you'd need:

-DJPH_DEBUG_RENDERER -DJPH_OBJECT_STREAM -DJPH_PROFILE_ENABLED -DJPH_USE_AVX -DJPH_USE_AVX2 -DJPH_USE_F16C -DJPH_USE_FMADD -DJPH_USE_LZCNT -DJPH_USE_SSE4_1 -DJPH_USE_SSE4_2 -DJPH_USE_TZCNT -D_DEBUG

(note that you're building in Debug mode here)