Compile linalg as library and track link dependencies for correct link order

cmake/CMakeLists.txt

@@ -162,12 +162,23 @@ endif()
 
 if(ENABLE_MSCG OR ENABLE_USER-ATC OR ENABLE_USER-AWPMD OR ENABLE_USER-QUIP)
   find_package(LAPACK)
-  if(LAPACK_FOUND)
-    list(APPEND LAMMPS_LINK_LIBS ${LAPACK_LIBRARIES})
-  else()
+  if(NOT LAPACK_FOUND)
     enable_language(Fortran)
     file(GLOB LAPACK_SOURCES ${LAMMPS_LIB_SOURCE_DIR}/linalg/*.f)
-    list(APPEND LIB_SOURCES ${LAPACK_SOURCES})
+
+    if(BUILD_SHARED_PKG_LIBS)
+      add_library(linalg SHARED ${LAPACK_SOURCES})
+      set_target_properties(${PKG_LIB} PROPERTIES SOVERSION ${SOVERSION})
+      if(INSTALL_LIB)
+        install(TARGETS linalg LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+      else()
+        message(FATAL_ERROR "Shared library has to be installed, use -DINSTALL_LIB=ON to install lammps with a library")
+      endif()
+    else()
+      add_library(linalg STATIC ${LAPACK_SOURCES})
+    endif()
+    target_compile_options(linalg PRIVATE -fno-second-underscore)
+    set(LAPACK_LIBRARIES linalg)
   endif()
 endif()
 
@@ -368,6 +379,14 @@ foreach(SIMPLE_LIB REAX MEAM POEMS USER-ATC USER-AWPMD USER-COLVARS USER-H5MD
   endif()
 endforeach()
 
+if(ENABLE_USER-AWPMD)
+  target_link_libraries(awpmd ${LAPACK_LIBRARIES})
+endif()
+
+if(ENABLE_USER-ATC)
+  target_link_libraries(atc ${LAPACK_LIBRARIES})
+endif()
+
 if(ENABLE_USER-H5MD)
   find_package(HDF5 REQUIRED)
   target_link_libraries(h5md ${HDF5_LIBRARIES})