include sysroot in linker search path (-L) (#33)

Co-authored-by: Marc-André Moreau <mamoreau@devolutions.net>

cmake/linux.toolchain.cmake

@@ -105,7 +105,7 @@ set(CROSS_LIBSTDCPP_INC_DIR "/usr/include/c++/${CROSS_GCC_VERSION}")
 set(CROSS_LIBSTDCPPBITS_INC_DIR "${CROSS_LIBSTDCPP_INC_DIR}/${CROSS_TARGET}")
 set(CROSS_LIBGCC_DIR "${LIBGCC_DIR}/${CROSS_TARGET}/${CROSS_GCC_VERSION}")
 set(CROSS_COMPILER_FLAGS "-iwithsysroot ${CROSS_MULTIARCH_INC_DIR}")
-set(CROSS_LINKER_FLAGS "-fuse-ld=lld -stdlib=libstdc++ -L \"${CROSS_LIBGCC_DIR}\"")
+set(CROSS_LINKER_FLAGS "-fuse-ld=lld -stdlib=libstdc++ -L \"${CMAKE_SYSROOT}/${CROSS_LIBGCC_DIR}\"")
 set(CMAKE_AR "${LLVM_PREFIX}/bin/llvm-ar" CACHE FILEPATH "" FORCE)
 set(CMAKE_NM "${LLVM_PREFIX}/bin/llvm-nm" CACHE FILEPATH "" FORCE)
 set(CMAKE_RANLIB "${LLVM_PREFIX}/bin/llvm-ranlib${EXE_SUFFIX}" CACHE FILEPATH "" FORCE)