头文件数组 multiply defined 问题

移植CMSISNN库，复制里面的几个关键数学函数表，写在单独的文件中，便于管理 ：

/*  * arm_nn_q.h  *  *  Created on: 2022??5??9??  *      Author: razor7788  */  #ifndef __ARM_NN_Q_H__ #define __ARM_NN_Q_H__  #include "cmsis_datatype.h"      const q15_t sigmoidTable_q15[256] = {     0x4000, 0x4200, 0x43ff, 0x45fc, 0x47f5, 0x49eb, 0x4bdc, 0x4dc8, 0x4fad, 0x518a, 0x5360, 0x552c, 0x56ef, 0x58a8,     0x5a57, 0x5bfb, 0x5d93, 0x5f20, 0x60a1, 0x6216, 0x637f, 0x64db, 0x662b, 0x676f, 0x68a6, 0x69d2, 0x6af1, 0x6c05,     0x6d0d, 0x6e09, 0x6efb, 0x6fe2, 0x70be, 0x7190, 0x7258, 0x7316, 0x73cc, 0x7478, 0x751b, 0x75b7, 0x764a, 0x76d6,     0x775b, 0x77d8, 0x784f, 0x78c0, 0x792a, 0x798f, 0x79ee, 0x7a48, 0x7a9d, 0x7aed, 0x7b39, 0x7b80, 0x7bc4, 0x7c03,     0x7c3f, 0x7c78, 0x7cad, 0x7ce0, 0x7d0f, 0x7d3c, 0x7d66, 0x7d8d, 0x7db3, 0x7dd6, 0x7df7, 0x7e16, 0x7e33, 0x7e4f,     0x7e69, 0x7e81, 0x7e98, 0x7eae, 0x7ec2, 0x7ed5, 0x7ee7, 0x7ef8, 0x7f08, 0x7f17, 0x7f25, 0x7f32, 0x7f3e, 0x7f4a,     0x7f55, 0x7f5f, 0x7f69, 0x7f72, 0x7f7b, 0x7f83, 0x7f8a, 0x7f91, 0x7f98, 0x7f9e, 0x7fa4, 0x7faa, 0x7faf, 0x7fb4,     0x7fb8, 0x7fbd, 0x7fc1, 0x7fc5, 0x7fc8, 0x7fcc, 0x7fcf, 0x7fd2, 0x7fd5, 0x7fd7, 0x7fda, 0x7fdc, 0x7fde, 0x7fe0,     0x7fe2, 0x7fe4, 0x7fe6, 0x7fe7, 0x7fe9, 0x7fea, 0x7feb, 0x7fed, 0x7fee, 0x7fef, 0x7ff0, 0x7ff1, 0x7ff2, 0x7ff3,     0x7ff4, 0x7ff4, 0x000b, 0x000c, 0x000c, 0x000d, 0x000e, 0x000f, 0x0010, 0x0011, 0x0012, 0x0013, 0x0015, 0x0016,     0x0017, 0x0019, 0x001a, 0x001c, 0x001e, 0x0020, 0x0022, 0x0024, 0x0026, 0x0029, 0x002b, 0x002e, 0x0031, 0x0034,     0x0038, 0x003b, 0x003f, 0x0043, 0x0048, 0x004c, 0x0051, 0x0056, 0x005c, 0x0062, 0x0068, 0x006f, 0x0076, 0x007d,     0x0085, 0x008e, 0x0097, 0x00a1, 0x00ab, 0x00b6, 0x00c2, 0x00ce, 0x00db, 0x00e9, 0x00f8, 0x0108, 0x0119, 0x012b,     0x013e, 0x0152, 0x0168, 0x017f, 0x0197, 0x01b1, 0x01cd, 0x01ea, 0x0209, 0x022a, 0x024d, 0x0273, 0x029a, 0x02c4,     0x02f1, 0x0320, 0x0353, 0x0388, 0x03c1, 0x03fd, 0x043c, 0x0480, 0x04c7, 0x0513, 0x0563, 0x05b8, 0x0612, 0x0671,     0x06d6, 0x0740, 0x07b1, 0x0828, 0x08a5, 0x092a, 0x09b6, 0x0a49, 0x0ae5, 0x0b88, 0x0c34, 0x0cea, 0x0da8, 0x0e70,     0x0f42, 0x101e, 0x1105, 0x11f7, 0x12f3, 0x13fb, 0x150f, 0x162e, 0x175a, 0x1891, 0x19d5, 0x1b25, 0x1c81, 0x1dea,     0x1f5f, 0x20e0, 0x226d, 0x2405, 0x25a9, 0x2758, 0x2911, 0x2ad4, 0x2ca0, 0x2e76, 0x3053, 0x3238, 0x3424, 0x3615,     0x380b, 0x3a04, 0x3c01, 0x3e00, };  const q15_t tanhTable_q15[256] = {     0x0000, 0x07fd, 0x0feb, 0x17b9, 0x1f59, 0x26bf, 0x2ddf, 0x34ae, 0x3b27, 0x4142, 0x46fd, 0x4c56, 0x514d, 0x55e2,     0x5a1a, 0x5df6, 0x617c, 0x64b0, 0x6797, 0x6a37, 0x6c95, 0x6eb5, 0x709e, 0x7254, 0x73dc, 0x753a, 0x7672, 0x7788,     0x787f, 0x795b, 0x7a1e, 0x7acb, 0x7b65, 0x7bee, 0x7c66, 0x7cd1, 0x7d30, 0x7d84, 0x7dce, 0x7e0f, 0x7e49, 0x7e7d,     0x7eaa, 0x7ed2, 0x7ef5, 0x7f14, 0x7f30, 0x7f48, 0x7f5e, 0x7f71, 0x7f82, 0x7f91, 0x7f9e, 0x7fa9, 0x7fb3, 0x7fbc,     0x7fc4, 0x7fcb, 0x7fd1, 0x7fd7, 0x7fdc, 0x7fe0, 0x7fe4, 0x7fe7, 0x7fea, 0x7fed, 0x7fef, 0x7ff1, 0x7ff3, 0x7ff4,     0x7ff6, 0x7ff7, 0x7ff8, 0x7ff9, 0x7ffa, 0x7ffa, 0x7ffb, 0x7ffc, 0x7ffc, 0x7ffd, 0x7ffd, 0x7ffd, 0x7ffe, 0x7ffe,     0x7ffe, 0x7ffe, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff,     0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff,     0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff, 0x7fff,     0x7fff, 0x7fff, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000,     0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000,     0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8001, 0x8001, 0x8001, 0x8001, 0x8001, 0x8001,     0x8001, 0x8001, 0x8001, 0x8002, 0x8002, 0x8002, 0x8002, 0x8003, 0x8003, 0x8003, 0x8004, 0x8004, 0x8005, 0x8006,     0x8006, 0x8007, 0x8008, 0x8009, 0x800a, 0x800c, 0x800d, 0x800f, 0x8011, 0x8013, 0x8016, 0x8019, 0x801c, 0x8020,     0x8024, 0x8029, 0x802f, 0x8035, 0x803c, 0x8044, 0x804d, 0x8057, 0x8062, 0x806f, 0x807e, 0x808f, 0x80a2, 0x80b8,     0x80d0, 0x80ec, 0x810b, 0x812e, 0x8156, 0x8183, 0x81b7, 0x81f1, 0x8232, 0x827c, 0x82d0, 0x832f, 0x839a, 0x8412,     0x849b, 0x8535, 0x85e2, 0x86a5, 0x8781, 0x8878, 0x898e, 0x8ac6, 0x8c24, 0x8dac, 0x8f62, 0x914b, 0x936b, 0x95c9,     0x9869, 0x9b50, 0x9e84, 0xa20a, 0xa5e6, 0xaa1e, 0xaeb3, 0xb3aa, 0xb903, 0xbebe, 0xc4d9, 0xcb52, 0xd221, 0xd941,     0xe0a7, 0xe847, 0xf015, 0xf803, };  const q7_t sigmoidTable_q7[256] = {     0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x53, 0x55, 0x57, 0x59, 0x5a, 0x5c, 0x5e, 0x5f, 0x61,     0x62, 0x63, 0x65, 0x66, 0x67, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x72, 0x73, 0x74, 0x74,     0x75, 0x76, 0x76, 0x77, 0x77, 0x78, 0x78, 0x79, 0x79, 0xa, 0x7a, 0x7a, 0x7b, 0x7b, 0x7b, 0x7c, 0x7c, 0x7c, 0x7c,
    0x7c, 0x7d, 0x7d, 0x7d, 0x7d, 0x7d, 0x7e, 0x7e, 0x7e, 0x7e, 0x7e, 0x7e, 0x7e, 0x7e, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
    0x02, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04, 0x04, 0x05, 0x05, 0x05, 0x06, 0x06,
    0x06, 0x07, 0x07, 0x08, 0x08, 0x09, 0x09, 0x0a, 0x0a, 0x0b, 0x0c, 0x0c, 0x0d, 0x0e, 0x0e, 0x0f, 0x10, 0x11, 0x12,
    0x13, 0x14, 0x15, 0x16, 0x17, 0x19, 0x1a, 0x1b, 0x1d, 0x1e, 0x1f, 0x21, 0x22, 0x24, 0x26, 0x27, 0x29, 0x2b, 0x2d,
    0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e,
};


const q7_t tanhTable_q7[256] = {
    0x00, 0x08, 0x10, 0x18, 0x1f, 0x27, 0x2e, 0x35, 0x3b, 0x41, 0x47, 0x4c, 0x51, 0x56, 0x5a, 0x5e, 0x61, 0x65, 0x68,
    0x6a, 0x6d, 0x6f, 0x71, 0x72, 0x74, 0x75, 0x76, 0x78, 0x78, 0x79, 0x7a, 0x7b, 0x7b, 0x7c, 0x7c, 0x7d, 0x7d, 0x7e,
    0x7e, 0x7e, 0x7e, 0x7e, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x80, 0x80, 0x80, 0x80, 0x80,
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x81, 0x81,
    0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x82, 0x82, 0x82, 0x82, 0x82, 0x83, 0x83, 0x84, 0x84, 0x85, 0x85, 0x86, 0x87,
    0x88, 0x88, 0x8a, 0x8b, 0x8c, 0x8e, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9b, 0x9f, 0xa2, 0xa6, 0xaa, 0xaf, 0xb4, 0xb9,
    0xbf, 0xc5, 0xcb, 0xd2, 0xd9, 0xe1, 0xe8, 0xf0, 0xf8,
};

__STATIC_FORCEINLINE uint32_t __QSUB16(uint32_t op1, uint32_t op2)
{
  uint32_t result;

  __asm ("qsub16 %0, %1, %2" : "=r" (result) : "r" (op1), "r" (op2) );
  return(result);
}

#endif

类似上面这样 （内容不全）。

编译后报错如下 ：

.\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_activation.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_avgpool.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_conv2d.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_dense.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_dw_conv2d.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_gru_cell.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_maxpool.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_matrix.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_simple_cell.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_softmax.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by nnom_lstm_cell.o and arm_nn_q.o). .\Objects\nnom_cm4.axf: Error: L6200E: Symbol sigmoidTable_q15 multiply defined (by mfcc.o and arm_nn_q.o).

 发现只要是包含了此头文件的.c都报错 ，急于验证效果 就暂时不同cmsis nn加速了 ，但是问题总是要解决 ，验证完整体功能 再看一边代码 发现问题原因：

原来是数组声明时  ，没有加 static 限定。头文件在预处理时只做展开 ，所以不加static时就会造成所有包含了此头文件的C文件都会有这些个数组 ，而添加static 他们就只会在当前文件中生效。这点很重要。

想不到会在这里翻车 ，以后要多多注意。