摘要：
最后，strncpy_ HiSilicon在库libsecurec中有自己的几个函数的实现，例如S。因此，基本数据库应该放在右侧。附加您自己的Makefile以避免忘记CC=arm himix200 linux gccCFLAGS=-Wall O-gINCLUDE=-I.I/include#可执行文件的名称TARGET=enJpeg#link libmpi。a和其他库文件LIBPATH=-L/Lb/LIBNAME=-lmpi live lupvqe ldnvqe lVoiceEngine lpthread lsecurec#正则表达式表示目录C文件中的所有文件，C_SRCS=$#第一行依赖项：冒号后面是依赖文件#第二行规则：$@表示目标文件，$^表示所有依赖文件，$˂表示第一个从属文件$：$$$$$-o./build/$@^#makeclean将删除所有。o和目标文件清理：rm-f./build/*
我在使用海思硬件接口的时候，用到了mpi库，然后Makefile里面链接了这个库，但是编译到了链接的时候报错了：
./lib//libmpi.so: undefined reference to `sem_post' ./lib//libmpi.so: undefined reference to `snprintf_s' ./lib//libmpi.so: undefined reference to `sincos' ./lib//libmpi.so: undefined reference to `HI_DNVQE_ReadFrame' ./lib//libmpi.so: undefined reference to `HI_VOICE_EncodeFrame' ./lib//libmpi.so: undefined reference to `atan2' ./lib//libmpi.so: undefined reference to `HI_UPVQE_Create' ./lib//libmpi.so: undefined reference to `HI_UPVQE_SetVolume' ./lib//libmpi.so: undefined reference to `sem_trywait' ./lib//libmpi.so: undefined reference to `acos' ./lib//libmpi.so: undefined reference to `HI_UPVQE_GetVolume' ./lib//libmpi.so: undefined reference to `HI_VOICE_DecReset' ./lib//libmpi.so: undefined reference to `HI_DNVQE_WriteFrame' ./lib//libmpi.so: undefined reference to `HI_DNVQE_Create' ./lib//libmpi.so: undefined reference to `sin' ./lib//libmpi.so: undefined reference to `HI_UPVQE_Destroy' ./lib//libmpi.so: undefined reference to `HI_UPVQE_GetConfig' ./lib//libmpi.so: undefined reference to `sem_getvalue' ./lib//libmpi.so: undefined reference to `sem_wait' ./lib//libmpi.so: undefined reference to `HI_VOICE_EncReset' ./lib//libmpi.so: undefined reference to `sem_init' ./lib//libmpi.so: undefined reference to `HI_UPVQE_ReadFrame' ./lib//libmpi.so: undefined reference to `memcpy_s' ./lib//libmpi.so: undefined reference to `tan' ./lib//libmpi.so: undefined reference to `HI_UPVQE_WriteFrame' ./lib//libmpi.so: undefined reference to `memmove_s' ./lib//libmpi.so: undefined reference to `pthread_join' ./lib//libmpi.so: undefined reference to `HI_VOICE_DecodeFrame' ./lib//libmpi.so: undefined reference to `pthread_create' ./lib//libmpi.so: undefined reference to `pow' ./lib//libmpi.so: undefined reference to `round' ./lib//libmpi.so: undefined reference to `log10' ./lib//libmpi.so: undefined reference to `HI_DNVQE_GetConfig' ./lib//libmpi.so: undefined reference to `sqrt' ./lib//libmpi.so: undefined reference to `sem_destroy' ./lib//libmpi.so: undefined reference to `memset_s' ./lib//libmpi.so: undefined reference to `strncpy_s' ./lib//libmpi.so: undefined reference to `HI_DNVQE_Destroy'
这些信号相关的函数链接pthread库，HI_*相关的接口去文档查属于哪个库，或许我的文档跟当前开发板不匹配，我连续找了三个没找到，不过这么火的芯片别人肯定也用过，所以方案一直接上网搜该函数；方案二我有一份领导给的头文件和库文件，我到整个头文件里面能找到相应的函数，然后就去把名字差不多的库文件链接进去，果然编译通过了。还有要特别注意的是基础库要靠右侧。最后，strncpy_s等几个函数海思有自己的实现，在库libsecurec.so（或静态库libsecurec.a）里面，这个基础库要靠右侧放。
附上自己的Makefile吧，省得下次忘记了
CC = arm-himix200-linux-gcc CCFLAGS = -Wall -O -g INCLUDE = -I ./include # 可执行文件的名字 TARGET = encJpeg # 链接 libmpi.a等库文件 LIBPATH = -L ./lib/ LIBNAME = -lmpi -live -lupvqe -ldnvqe -lVoiceEngine -lpthread -lsecurec #正则表达式表示目录下所有.c文件， C_SRCS= $(wildcard ./src/*.c) # 第一行依赖关系：冒号后面为依赖的文件 # 第二行规则：$@表示目标文件，$^表示所有依赖文件，$<表示第一个依赖文件 $(TARGET): $(C_SRCS) $(CC) $(CCFLAGS) $(INCLUDE) $(LIBPATH) $(LIBNAME) -o ./build/$@ $^ # make clean删除所有.o和目标文件 clean: rm -f ./build/*