rror @Cuda: la función ya se ha definido en otro archivo .cu.obj

Estoy tratando de compilar un proyecto cuda que alguien me envió. Aunque la etapa de compilación pasa, la etapa de enlace falla. A continuación se muestra un ejemplo del error:

Error   298 error LNK2005: "int __cdecl compare_ints(void const *,void const *)" (?compare_ints@@YAHPBX0@Z) already defined in 3level_1.cu.obj  decode_p4.cu.obj    

Básicamente, el archivo decode_p4.cu.obj se queja de que la función compare_ints ya está definida en 3level_1.cu.obj. ¿Alguna idea sobre cómo evitar este comportamiento?

Abajo hay una lista de errores similares si eso ayuda:

Error   384 error LNK2005: "int __cdecl compare_ints(void const *,void const *)" (?compare_ints@@YAHPBX0@Z) already defined in 3level_1.cu.obj  decode_p4.cu.obj    god
Error   385 error LNK2005: "int __cdecl cpu_intersection(unsigned int *,int,unsigned int *,int)" (?cpu_intersection@@YAHPAIH0H@Z) already defined in 3level_1.cu.obj    decode_p4.cu.obj    god
Error   386 error LNK2005: "int __cdecl intersection_cpu(unsigned int * * const,int * const,int)" (?intersection_cpu@@YAHQAPAIQAHH@Z) already defined in 3level_1.cu.obj    decode_p4.cu.obj    god
Error   387 error LNK2005: "void __cdecl sort_it(unsigned int * * const,int * const,int)" (?sort_it@@YAXQAPAIQAHH@Z) already defined in 3level_1.cu.obj decode_p4.cu.obj    god
Error   388 error LNK2005: "int __cdecl GPU_Intersection(unsigned int * * const,int * const,int,unsigned int *,unsigned int *,unsigned int *,struct uint4 *)" (?GPU_Intersection@@YAHQAPAIQAHHPAI22PAUuint4@@@Z) already defined in 3level_1.cu.obj decode_p4.cu.obj    god
Error   389 error LNK2005: "int __cdecl ceilPow2(int)" (?ceilPow2@@YAHH@Z) already defined in 3level_1.cu.obj   decode_p4.cu.obj    god
Error   390 error LNK2005: "void __cdecl recAllocate1(int,int)" (?recAllocate1@@YAXHH@Z) already defined in 3level_1.cu.obj decode_p4.cu.obj    god
Error   391 error LNK2005: "unsigned int __cdecl getceilPow2(unsigned int)" (?getceilPow2@@YAII@Z) already defined in 3level_1.cu.obj   decode_p4.cu.obj    god
Error   392 error LNK2005: "void __cdecl runTest(int,char * *)" (?runTest@@YAXHPAPAD@Z) already defined in 3level_1.cu.obj  decode_p4.cu.obj    god
Error   393 error LNK2005: "void __cdecl __device_stub__Z13scanBlockMAX1P5uint4S0_Pj(struct uint4 *,struct uint4 *,unsigned int *)" (?__device_stub__Z13scanBlockMAX1P5uint4S0_Pj@@YAXPAUuint4@@0PAI@Z) already defined in 3level_1.cu.obj  decode_p4.cu.obj    god
Error   394 error LNK2005: "void __cdecl scanBlockMAX1(struct uint4 *,struct uint4 *,unsigned int *)" (?scanBlockMAX1@@YAXPAUuint4@@0PAI@Z) already defined in 3level_1.cu.obj  decode_p4.cu.obj    god
Error   395 error LNK2005: "void __cdecl __device_stub__Z16scanBlockMAX1_gpP5uint4S0_Pj(struct uint4 *,struct uint4 *,unsigned int *)" (?__device_stub__Z16scanBlockMAX1_gpP5uint4S0_Pj@@YAXPAUuint4@@0PAI@Z) already defined in 3level_1.cu.obj    decode_p4.cu.obj    god

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