这些是内部函数，只有头文件里有声明。是常见的商业软件保密方法。（只发布头文件和源代码编译成的动态链接库）
如果要使用，
第一步，包含定义该函数的头文件
第二步，编译的时候链接到包含该函数定义的动态链接库。
可以使用grep找到包含该函数的声明头文件和各状况下的动态链接库。
can@M320:/ansys_inc> sudo grep -r Alloc_Storage_Vars . 
grep: ./v231/fluent/fluent23.1.0/linmic/3ddp_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/linmic/2ddp_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/linmic/2d_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/linmic/3d_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/3ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/2ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/3d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/2d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/2d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/2ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/msmdbatt/lnamd64/3ddp_node/cae_batt.o: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/msmdbatt/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/msmdbatt/lnamd64/3d_node/cae_batt.o: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/msmdbatt/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/htc/lnamd64/3ddp_node/libhtcns.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/htc/lnamd64/2ddp_node/libhtcns.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/htc/lnamd64/2d_node/libhtcns.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/htc/lnamd64/3d_node/libhtcns.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/fensapice/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/fensapice/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/3ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/2ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/3d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/2d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/2d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/2ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/3ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/2ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/3d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/2d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/2d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/2ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mpm/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mpm/lnamd64/2ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mpm/lnamd64/2d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mpm/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/3ddp_host/fluent.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/3ddp_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/2ddp_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/3d_host/fluent.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/2d_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/2d_host/fluent.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/2ddp_host/fluent.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/3d_node/fluent_mpi.23.1.0: binary file matches
./v231/fluent/fluent23.1.0/src/storage/storage.h:FLUENT_EXPORT void Alloc_Storage_Vars(Domain *, ...);
./v231/fluent/fluent23.1.0/src/storage/storage.h:FLUENT_EXPORT void MD_Alloc_Storage_Vars(Domain *, ...);
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