已定义但未用于整个项目的变量
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【中文标题】已定义但未用于整个项目的变量【英文标题】：Variables defined but not used for entire project 【发布时间】：2019-11-10 18:34:10 【问题描述】：突然，在为我的项目重写库时，为项目中的所有库声明的所有静态变量都给出了一个警告，表示已定义但未使用。即使它有警卫，我也会在标头内多次定义变量时遇到错误。有没有解决这些问题的通用方法？我已经尝试了一段时间，但它没有帮助。
我已尝试通过排除库/部分代码来跟踪问题，但问题仍然存在。
多定义部分代码的标头：
/*
* fonts.h
*
* Library of fonts
* Large: 8x8, normal: 5x7 and small: 4x7
*/
#ifndef FONTS_H_
#define FONTS_H_
#include <avr/pgmspace.h>
// Font 8x8 - Large
const unsigned char PROGMEM font8[95][8] =
0b00000000,0b00000000,0b00000000,0b00000000,0b00000000,0b00000000,0b00000000,0b00000000, //
0b00000000,0b00000110,0b01011111,0b01011111,0b00000110,0b00000000,0b00000000,0b00000000, // !
0b00000000,0b00000111,0b00000111,0b00000000,0b00000111,0b00000111,0b00000000,0b00000000, // "
0b00010100,0b01111111,0b01111111,0b00010100,0b01111111,0b01111111,0b00010100,0b00000000, // #
0b00100100,0b00101110,0b01101011,0b01101011,0b00111010,0b00010010,0b00000000,0b00000000, // $
0b01000110,0b01100110,0b00110000,0b00011000,0b00001100,0b01100110,0b01100010,0b00000000, // %
0b00110000,0b01111010,0b01001111,0b01011101,0b00110111,0b01111010,0b01001000,0b00000000, // &
0b00000100,0b00000111,0b00000011,0b00000000,0b00000000,0b00000000,0b00000000,0b00000000, // '
0b00000000,0b00011100,0b00111110,0b01100011,0b01000001,0b00000000,0b00000000,0b00000000, // (
0b00000000,0b01000001,0b01100011,0b00111110,0b00011100,0b00000000,0b00000000,0b00000000, // )
0b00001000,0b00101010,0b00111110,0b00011100,0b00011100,0b00111110,0b00101010,0b00001000, // *
0b00001000,0b00001000,0b00111110,0b00111110,0b00001000,0b00001000,0b00000000,0b00000000, // +
0b00000000,0b10100000,0b11100000,0b01100000,0b00000000,0b00000000,0b00000000,0b00000000, // ,
0b00001000,0b00001000,0b00001000,0b00001000,0b00001000,0b00001000,0b00000000,0b00000000, // -
0b00000000,0b00000000,0b01100000,0b01100000,0b00000000,0b00000000,0b00000000,0b00000000, // .
0b01100000,0b00110000,0b00011000,0b00001100,0b00000110,0b00000011,0b00000001,0b00000000, // /
0b00111110,0b01111111,0b01011001,0b01001101,0b01111111,0b00111110,0b00000000,0b00000000, // 0
0b01000010,0b01000010,0b01111111,0b01111111,0b01000000,0b01000000,0b00000000,0b00000000, // 1
0b01100010,0b01110011,0b01011001,0b01001001,0b01101111,0b01100110,0b00000000,0b00000000, // 2
0b00100010,0b01100011,0b01001001,0b01001001,0b01111111,0b00110110,0b00000000,0b00000000, // 3
0b00011000,0b00011100,0b00010110,0b00010011,0b01111111,0b01111111,0b00010000,0b00000000, // 4
0b00100111,0b01100111,0b01000101,0b01000101,0b01111101,0b00111001,0b00000000,0b00000000, // 5
0b00111100,0b01111110,0b01001011,0b01001001,0b01111001,0b00110000,0b00000000,0b00000000, // 6
0b00000011,0b01100011,0b01110001,0b00011001,0b00001111,0b00000111,0b00000000,0b00000000, // 7
0b00110110,0b01111111,0b01001001,0b01001001,0b01111111,0b00110110,0b00000000,0b00000000, // 8
0b00000110,0b01001111,0b01001001,0b01101001,0b00111111,0b00011110,0b00000000,0b00000000, // 9
0b00000000,0b00000000,0b01101100,0b01101100,0b00000000,0b00000000,0b00000000,0b00000000, // :
0b00000000,0b10100000,0b11101100,0b01101100,0b00000000,0b00000000,0b00000000,0b00000000, // ;
0b00001000,0b00011100,0b00110110,0b01100011,0b01000001,0b00000000,0b00000000,0b00000000, // <
0b00010100,0b00010100,0b00010100,0b00010100,0b00010100,0b00010100,0b00000000,0b00000000, // =
0b00000000,0b01000001,0b01100011,0b00110110,0b00011100,0b00001000,0b00000000,0b00000000, // >
0b00000010,0b00000011,0b01010001,0b01011001,0b00001111,0b00000110,0b00000000,0b00000000, // ?
0b00111110,0b01111111,0b01000001,0b01011101,0b01011101,0b00011111,0b00011110,0b00000000, // @
0b01111100,0b01111110,0b00010011,0b00010011,0b01111110,0b01111100,0b00000000,0b00000000, // A
0b01000001,0b01111111,0b01111111,0b01001001,0b01001001,0b01111111,0b00110110,0b00000000, // B
0b00011100,0b00111110,0b01100011,0b01000001,0b01000001,0b01100011,0b00100010,0b00000000, // C
0b01000001,0b01111111,0b01111111,0b01000001,0b01100011,0b01111111,0b00011100,0b00000000, // D
0b01000001,0b01111111,0b01111111,0b01001001,0b01011101,0b01000001,0b01100011,0b00000000, // E
0b01000001,0b01111111,0b01111111,0b01001001,0b00011101,0b00000001,0b00000011,0b00000000, // F
0b00011100,0b00111110,0b01100011,0b01000001,0b01010001,0b01110011,0b01110010,0b00000000, // G
0b01111111,0b01111111,0b00001000,0b00001000,0b01111111,0b01111111,0b00000000,0b00000000, // H
0b00000000,0b01000001,0b01111111,0b01111111,0b01000001,0b00000000,0b00000000,0b00000000, // I
0b00110000,0b01110000,0b01000000,0b01000001,0b01111111,0b00111111,0b00000001,0b00000000, // J
0b01000001,0b01111111,0b01111111,0b00001000,0b00011100,0b01110111,0b01100011,0b00000000, // K
0b01000001,0b01111111,0b01111111,0b01000001,0b01000000,0b01100000,0b01110000,0b00000000, // L
0b01111111,0b01111111,0b00000110,0b00001100,0b00000110,0b01111111,0b01111111,0b00000000, // M
0b01111111,0b01111111,0b00000110,0b00001100,0b00011000,0b01111111,0b01111111,0b00000000, // N
0b00011100,0b00111110,0b01100011,0b01000001,0b01100011,0b00111110,0b00011100,0b00000000, // O
0b01000001,0b01111111,0b01111111,0b01001001,0b00001001,0b00001111,0b00000110,0b00000000, // P
0b00011110,0b00111111,0b00100001,0b01110001,0b01111111,0b01011110,0b00000000,0b00000000, // Q
0b01000001,0b01111111,0b01111111,0b00011001,0b00111001,0b01101111,0b01000110,0b00000000, // R
0b00100110,0b01100111,0b01001101,0b01011001,0b01111011,0b00110010,0b00000000,0b00000000, // S
0b00000011,0b01000001,0b01111111,0b01111111,0b01000001,0b00000011,0b00000000,0b00000000, // T
0b01111111,0b01111111,0b01000000,0b01000000,0b01111111,0b01111111,0b00000000,0b00000000, // U
0b00011111,0b00111111,0b01100000,0b01100000,0b00111111,0b00011111,0b00000000,0b00000000, // V
0b01111111,0b01111111,0b00110000,0b00011000,0b00110000,0b01111111,0b01111111,0b00000000, // W
0b01100011,0b01110111,0b00011100,0b00001000,0b00011100,0b01110111,0b01100011,0b00000000, // X
0b00000111,0b01001111,0b01111000,0b01111000,0b01001111,0b00000111,0b00000000,0b00000000, // Y
0b01100111,0b01110011,0b01011001,0b01001101,0b01000111,0b01100011,0b01110001,0b00000000, // Z
0b00000000,0b01111111,0b01111111,0b01000001,0b01000001,0b00000000,0b00000000,0b00000000, // [
0b00000001,0b00000011,0b00000110,0b00001100,0b00011000,0b00110000,0b01100000,0b00000000, // "\"
0b00000000,0b01000001,0b01000001,0b01111111,0b01111111,0b00000000,0b00000000,0b00000000, // ]
0b00001000,0b00001100,0b00000110,0b00000011,0b00000110,0b00001100,0b00001000,0b00000000, // ^
0b10000000,0b10000000,0b10000000,0b10000000,0b10000000,0b10000000,0b10000000,0b10000000, // _
0b00000000,0b00000000,0b00000011,0b00000111,0b00000100,0b00000000,0b00000000,0b00000000, // `
0b00100000,0b01110100,0b01010100,0b01010100,0b00111100,0b01111000,0b01000000,0b00000000, // a
0b01000001,0b00111111,0b01111111,0b01000100,0b01000100,0b01111100,0b00111000,0b00000000, // b
0b00111000,0b01111100,0b01000100,0b01000100,0b01101100,0b00101000,0b00000000,0b00000000, // c
0b00110000,0b01111000,0b01001000,0b01001001,0b00111111,0b01111111,0b01000000,0b00000000, // d
0b00111000,0b01111100,0b01010100,0b01010100,0b01011100,0b00011000,0b00000000,0b00000000, // e
0b01001000,0b01111110,0b01111111,0b01001001,0b00000011,0b00000010,0b00000000,0b00000000, // f
0b10011000,0b10111100,0b10100100,0b10100100,0b11111000,0b01111100,0b00000100,0b00000000, // g
0b01000001,0b01111111,0b01111111,0b00001000,0b00000100,0b01111100,0b01111000,0b00000000, // h
0b00000000,0b01000100,0b01111101,0b01111101,0b01000000,0b00000000,0b00000000,0b00000000, // i
0b01000000,0b11000100,0b10000100,0b11111101,0b01111101,0b00000000,0b00000000,0b00000000, // j
0b01000001,0b01111111,0b01111111,0b00010000,0b00111000,0b01101100,0b01000100,0b00000000, // k
0b00000000,0b01000001,0b01111111,0b01111111,0b01000000,0b00000000,0b00000000,0b00000000, // l
0b01111100,0b01111100,0b00001100,0b00011000,0b00001100,0b01111100,0b01111000,0b00000000, // m
0b01111100,0b01111100,0b00000100,0b00000100,0b01111100,0b01111000,0b00000000,0b00000000, // n
0b00111000,0b01111100,0b01000100,0b01000100,0b01111100,0b00111000,0b00000000,0b00000000, // o
0b10000100,0b11111100,0b11111000,0b10100100,0b00100100,0b00111100,0b00011000,0b00000000, // p
0b00011000,0b00111100,0b00100100,0b10100100,0b11111000,0b11111100,0b10000100,0b00000000, // q
0b01000100,0b01111100,0b01111000,0b01000100,0b00011100,0b00011000,0b00000000,0b00000000, // r
0b01001000,0b01011100,0b01010100,0b01010100,0b01110100,0b00100100,0b00000000,0b00000000, // s
0b00000000,0b00000100,0b00111110,0b01111111,0b01000100,0b00100100,0b00000000,0b00000000, // t
0b00111100,0b01111100,0b01000000,0b01000000,0b00111100,0b01111100,0b01000000,0b00000000, // u
0b00011100,0b00111100,0b01100000,0b01100000,0b00111100,0b00011100,0b00000000,0b00000000, // v
0b00111100,0b01111100,0b01100000,0b00110000,0b01100000,0b01111100,0b00111100,0b00000000, // w
0b01000100,0b01101100,0b00111000,0b00010000,0b00111000,0b01101100,0b01000100,0b00000000, // x
0b10011100,0b10111100,0b10100000,0b10100000,0b11111100,0b01111100,0b00000000,0b00000000, // y
0b01001100,0b01100100,0b01110100,0b01011100,0b01001100,0b01100100,0b00000000,0b00000000, // z
0b00001000,0b00001000,0b00111110,0b01110111,0b01000001,0b01000001,0b00000000,0b00000000, //
0b00000000,0b00000000,0b00000000,0b01110111,0b01110111,0b00000000,0b00000000,0b00000000, // |
0b01000001,0b01000001,0b01110111,0b00111110,0b00001000,0b00001000,0b00000000,0b00000000, //
0b00000010,0b00000011,0b00000001,0b00000011,0b00000010,0b00000011,0b00000001,0b00000000, // ~
;
// Font 5x7 - normal
const unsigned char PROGMEM font5[95][5] =
0b00000000,0b00000000,0b00000000,0b00000000,0b00000000, //
0b00000000,0b00000000,0b01011111,0b00000000,0b00000000, // !
0b00000000,0b00000111,0b00000000,0b00000111,0b00000000, // "
0b00010100,0b01111111,0b00010100,0b01111111,0b00010100, // #
0b00100100,0b00101010,0b01111111,0b00101010,0b00010010, // $
0b00100011,0b00010011,0b00001000,0b01100100,0b01100010, // %
0b00110110,0b01001001,0b01010101,0b00100010,0b01010000, // &
0b00000000,0b00000101,0b00000011,0b00000000,0b00000000, // '
0b00000000,0b00011100,0b00100010,0b01000001,0b00000000, // (
0b00000000,0b01000001,0b00100010,0b00011100,0b00000000, // )
0b00001000,0b00101010,0b00011100,0b00101010,0b00001000, // *
0b00001000,0b00001000,0b00111110,0b00001000,0b00001000, // +
0b00000000,0b01010000,0b00110000,0b00000000,0b00000000, // ,
0b00001000,0b00001000,0b00001000,0b00001000,0b00001000, // -
0b00000000,0b01100000,0b01100000,0b00000000,0b00000000, // .
0b00100000,0b00010000,0b00001000,0b00000100,0b00000010, // /
0b00111110,0b01010001,0b01001001,0b01000101,0b00111110, // 0
0b00000000,0b01000010,0b01111111,0b01000000,0b00000000, // 1
0b01000010,0b01100001,0b01010001,0b01001001,0b01000110, // 2
0b00100001,0b01000001,0b01000101,0b01001011,0b00110001, // 3
0b00011000,0b00010100,0b00010010,0b01111111,0b00010000, // 4
0b00100111,0b01000101,0b01000101,0b01000101,0b00111001, // 5
0b00111100,0b01001010,0b01001001,0b01001001,0b00110000, // 6
0b00000001,0b01110001,0b00001001,0b00000101,0b00000011, // 7
0b00110110,0b01001001,0b01001001,0b01001001,0b00110110, // 8
0b00000110,0b01001001,0b01001001,0b00101001,0b00011110, // 9
0b00000000,0b00110110,0b00110110,0b00000000,0b00000000, // :
0b00000000,0b01010110,0b00110110,0b00000000,0b00000000, // ;
0b00000000,0b00001000,0b00010100,0b00100010,0b01000001, // <
0b00010100,0b00010100,0b00010100,0b00010100,0b00010100, // =
0b01000001,0b00100010,0b00010100,0b00001000,0b00000000, // >
0b00000010,0b00000001,0b01010001,0b00001001,0b00000110, // ?
0b00110010,0b01001001,0b01111001,0b01000001,0b00111110, // @
0b01111110,0b00010001,0b00010001,0b00010001,0b01111110, // A
0b01111111,0b01001001,0b01001001,0b01001001,0b00110110, // B
0b00111110,0b01000001,0b01000001,0b01000001,0b00100010, // C
0b01111111,0b01000001,0b01000001,0b00100010,0b00011100, // D
0b01111111,0b01001001,0b01001001,0b01001001,0b01000001, // E
0b01111111,0b00001001,0b00001001,0b00000001,0b00000001, // F
0b00111110,0b01000001,0b01000001,0b01010001,0b00110010, // G
0b01111111,0b00001000,0b00001000,0b00001000,0b01111111, // H
0b00000000,0b01000001,0b01111111,0b01000001,0b00000000, // I
0b00100000,0b01000000,0b01000001,0b00111111,0b00000001, // J
0b01111111,0b00001000,0b00010100,0b00100010,0b01000001, // K
0b01111111,0b01000000,0b01000000,0b01000000,0b01000000, // L
0b01111111,0b00000010,0b00000100,0b00000010,0b01111111, // M
0b01111111,0b00000100,0b00001000,0b00010000,0b01111111, // N
0b00111110,0b01000001,0b01000001,0b01000001,0b00111110, // O
0b01111111,0b00001001,0b00001001,0b00001001,0b00000110, // P
0b00111110,0b01000001,0b01010001,0b00100001,0b01011110, // Q
0b01111111,0b00001001,0b00011001,0b00101001,0b01000110, // R
0b01000110,0b01001001,0b01001001,0b01001001,0b00110001, // S
0b00000001,0b00000001,0b01111111,0b00000001,0b00000001, // T
0b00111111,0b01000000,0b01000000,0b01000000,0b00111111, // U
0b00011111,0b00100000,0b01000000,0b00100000,0b00011111, // V
0b01111111,0b00100000,0b00011000,0b00100000,0b01111111, // W
0b01100011,0b00010100,0b00001000,0b00010100,0b01100011, // X
0b00000011,0b00000100,0b01111000,0b00000100,0b00000011, // Y
0b01100001,0b01010001,0b01001001,0b01000101,0b01000011, // Z
0b00000000,0b00000000,0b01111111,0b01000001,0b01000001, // [
0b00000010,0b00000100,0b00001000,0b00010000,0b00100000, // "\"
0b01000001,0b01000001,0b01111111,0b00000000,0b00000000, // ]
0b00000100,0b00000010,0b00000001,0b00000010,0b00000100, // ^
0b01000000,0b01000000,0b01000000,0b01000000,0b01000000, // _
0b00000000,0b00000001,0b00000010,0b00000100,0b00000000, // `
0b00100000,0b01010100,0b01010100,0b01010100,0b01111000, // a
0b01111111,0b01001000,0b01000100,0b01000100,0b00111000, // b
0b00111000,0b01000100,0b01000100,0b01000100,0b00100000, // c
0b00111000,0b01000100,0b01000100,0b01001000,0b01111111, // d
0b00111000,0b01010100,0b01010100,0b01010100,0b00011000, // e
0b00001000,0b01111110,0b00001001,0b00000001,0b00000010, // f
0b00001000,0b00010100,0b01010100,0b01010100,0b00111100, // g
0b01111111,0b00001000,0b00000100,0b00000100,0b01111000, // h
0b00000000,0b01000100,0b01111101,0b01000000,0b00000000, // i
0b00100000,0b01000000,0b01000100,0b00111101,0b00000000, // j
0b00000000,0b01111111,0b00010000,0b00101000,0b01000100, // k
0b00000000,0b01000001,0b01111111,0b01000000,0b00000000, // l
0b01111100,0b00000100,0b00011000,0b00000100,0b01111000, // m
0b01111100,0b00001000,0b00000100,0b00000100,0b01111000, // n
0b00111000,0b01000100,0b01000100,0b01000100,0b00111000, // o
0b01111100,0b00010100,0b00010100,0b00010100,0b00001000, // p
0b00001000,0b00010100,0b00010100,0b00011000,0b01111100, // q
0b01111100,0b00001000,0b00000100,0b00000100,0b00001000, // r
0b01001000,0b01010100,0b01010100,0b01010100,0b00100000, // s
0b00000100,0b00111111,0b01000100,0b01000000,0b00100000, // t
0b00111100,0b01000000,0b01000000,0b00100000,0b01111100, // u
0b00011100,0b00100000,0b01000000,0b00100000,0b00011100, // v
0b00111100,0b01000000,0b00110000,0b01000000,0b00111100, // w
0b01000100,0b00101000,0b00010000,0b00101000,0b01000100, // x
0b00001100,0b01010000,0b01010000,0b01010000,0b00111100, // y
0b01000100,0b01100100,0b01010100,0b01001100,0b01000100, // z
0b00000000,0b00001000,0b00110110,0b01000001,0b00000000, //
0b00000000,0b00000000,0b01111111,0b00000000,0b00000000, // |
0b00000000,0b01000001,0b00110110,0b00001000,0b00000000, //
0b00000010,0b00000001,0b00000011,0b00000010,0b00000001, // ~
;
// Font 4x6 - Small
const unsigned char PROGMEM font4[95][4] =
0b00000000,0b00000000,0b00000000,0b00000000, //
0b00000000,0b01011100,0b00000000,0b00000000, // !
0b00001100,0b00000000,0b00001100,0b00000000, // "
0b01111100,0b00101000,0b01111100,0b00101000, // #
0b01011000,0b11011100,0b01101000,0b00000000, // $
0b00100100,0b00010000,0b01001000,0b00000000, // %
0b00101000,0b01010100,0b00101000,0b01000000, // &
0b00000000,0b00001100,0b00000000,0b00000000, // '
0b00000000,0b01111000,0b10000100,0b00000000, // (
0b10000100,0b01111000,0b00000000,0b00000000, // )
0b01010100,0b00111000,0b01010100,0b00000000, // *
0b00010000,0b01111100,0b00010000,0b00000000, // +
0b10000000,0b01000000,0b00000000,0b00000000, // ,
0b00010000,0b00010000,0b00010000,0b00000000, // -
0b00000000,0b01000000,0b00000000,0b00000000, // .
0b01100000,0b00010000,0b00001100,0b00000000, // /
0b00111000,0b01010100,0b00111000,0b00000000, // 0
0b01001000,0b01111100,0b01000000,0b00000000, // 1
0b01001000,0b01100100,0b01011000,0b00000000, // 2
0b01000100,0b01010100,0b00101100,0b00000000, // 3
0b00011100,0b00010000,0b01111100,0b00000000, // 4
0b01011100,0b01010100,0b00100100,0b00000000, // 5
0b00111000,0b01010100,0b00100100,0b00000000, // 6
0b01100100,0b00010100,0b00001100,0b00000000, // 7
0b01101000,0b01010100,0b00101100,0b00000000, // 8
0b01001000,0b01010100,0b00111000,0b00000000, // 9
0b00000000,0b01001000,0b00000000,0b00000000, // :
0b10000000,0b01001000,0b00000000,0b00000000, // ;
0b00010000,0b00101000,0b01000100,0b00000000, // <
0b00101000,0b00101000,0b00101000,0b00000000, // =
0b01000100,0b00101000,0b00010000,0b00000000, // >
0b00000100,0b01010100,0b00001000,0b00000000, // ?
0b00111000,0b01000100,0b01011100,0b00000000, // @
0b01111000,0b00010100,0b01111000,0b00000000, // A
0b01111100,0b01010100,0b00101000,0b00000000, // B
0b00111000,0b01000100,0b00101000,0b00000000, // C
0b01111100,0b01000100,0b00111000,0b00000000, // D
0b01111100,0b01010100,0b01000100,0b00000000, // E
0b01111100,0b00010100,0b00000100,0b00000000, // F
0b00111000,0b01000100,0b01110100,0b00000000, // G
0b01111100,0b00010000,0b01111100,0b00000000, // H
0b01000100,0b01111100,0b01000100,0b00000000, // I
0b00100000,0b01000000,0b00111100,0b00000000, // J
0b01111100,0b00010000,0b01101100,0b00000000, // K
0b01111100,0b01000000,0b01000000,0b00000000, // L
0b01111100,0b00011000,0b01111100,0b00000000, // M
0b01111000,0b00010000,0b00111100,0b00000000, // N
0b00111000,0b01000100,0b00111000,0b00000000, // O
0b01111100,0b00010100,0b00001000,0b00000000, // P
0b00111000,0b01000100,0b10111000,0b00000000, // Q
0b01111100,0b00010100,0b01101000,0b00000000, // R
0b01001000,0b01010100,0b00100100,0b00000000, // S
0b00000100,0b01111100,0b00000100,0b00000000, // T
0b01111100,0b01000000,0b01111100,0b00000000, // U
0b00111100,0b01100000,0b00111100,0b00000000, // V
0b01111100,0b00110000,0b01111100,0b00000000, // W
0b01101100,0b00010000,0b01101100,0b00000000, // X
0b00001100,0b01110000,0b00001100,0b00000000, // Y
0b01100100,0b01010100,0b01001100,0b00000000, // Z
0b00000000,0b01111100,0b01000100,0b00000000, // [
0b00001100,0b00010000,0b01100000,0b00000000, // "\"
0b01000100,0b01111100,0b00000000,0b00000000, // ]
0b00001000,0b00000100,0b00001000,0b00000000, // ^
0b10000000,0b10000000,0b10000000,0b00000000, // _
0b00000000,0b00000100,0b00001000,0b00000000, // `
0b00110000,0b01001000,0b01111000,0b00000000, // a
0b01111100,0b01001000,0b00110000,0b00000000, // b
0b00110000,0b01001000,0b01001000,0b00000000, // c
0b00110000,0b01001000,0b01111100,0b00000000, // d
0b00110000,0b01101000,0b01010000,0b00000000, // e
0b00010000,0b01111000,0b00010100,0b00000000, // f
0b10010000,0b10101000,0b01111000,0b00000000, // g
0b01111100,0b00001000,0b01110000,0b00000000, // h
0b01010000,0b01110100,0b01000000,0b00000000, // i
0b10000000,0b10000000,0b01110100,0b00000000, // j
0b01111100,0b00010000,0b01101000,0b00000000, // k
0b01000100,0b01111100,0b01000000,0b00000000, // l
0b01111000,0b00010000,0b01111000,0b00000000, // m
0b01111000,0b00001000,0b01110000,0b00000000, // n
0b00110000,0b01001000,0b00110000,0b00000000, // o
0b11111000,0b00101000,0b00010000,0b00000000, // p
0b00110000,0b01001000,0b11111000,0b00000000, // q
0b01111000,0b00010000,0b00001000,0b00000000, // r
0b01010000,0b01011000,0b00101000,0b00000000, // s
0b00001000,0b00111100,0b01001000,0b00000000, // t
0b00111000,0b01000000,0b01111000,0b00000000, // u
0b00111000,0b01000000,0b00111000,0b00000000, // v
0b01111000,0b00100000,0b01111000,0b00000000, // w
0b01001000,0b00110000,0b01001000,0b00000000, // x
0b10011000,0b10100000,0b01111000,0b00000000, // y
0b01001000,0b01101000,0b01011000,0b00000000, // z
0b00010000,0b01111000,0b10000100,0b00000000, //
0b00000000,0b01111100,0b00000000,0b00000000, // |
0b10000100,0b01111000,0b00010000,0b00000000, //
0b00001000,0b00000100,0b00001000,0b00000100, // ~
;
#endif /* FONTS_H_ */
由于我不知道是什么导致了问题，因此很难缩小范围并给出相关的项目代码。
编辑：在标题中声明 fonts.h 变量并在 fonts.c 文件中初始化它们解决了多重定义问题。静态变量“已定义但未使用”问题仍然存在
【问题讨论】：
您不得定义标题中带有外部链接的任何内容，句号。因此，问题出在此处的第 10 行和第 n-1 行之间存在的代码。你可以声明extern const unsigned char font8;（或者PROGMEM，不确定哪个是正确的）。
至于没有用到的静态变量，那肯定是个开关...
这些声明虽然使用 PROGMEM，但在我开始更改其他库之前确实有效。
很可能，您的“.h”文件只包含在一个“.c”文件中，现在它包含在其他“.c”文件中。另一种选择是库中的其他成员现在正在链接到您的代码中。
将所有数据放入fonts.c文件中，然后在头文件中只有一个数据的“原型”，类似于：extern const unsigned char PROGMEM font8[95][8];
【参考方案1】：
如果一个全局变量声明为static，这意味着它只能在这个特定的.c 文件中使用。如果变量已声明但从未使用过，则表示代码中存在语义错误，并被标记为警告。
一般方法：只需删除未使用的静态变量，或从声明中删除 static 关键字。
如果您在.h 文件中声明了数组。这意味着每次包含头文件时，都会创建这些变量的新副本。如果它们未声明为static，则会导致编译错误。如果是static，那么每个副本都会占用内存。
要解决此问题，您可能希望将这些数组移动到不带关键字 static 的 .c 文件中：
// inside .c file
const unsigned char PROGMEM font8[95][8] =
0b00000000,0b00000000,0b00000000,0b00000000,0b00000000,0b00000000,0b00000000,0b00000000,
...
在.h-file 中只对这些数组进行声明：
// inside .h file
extern const unsigned char PROGMEM font8[95][8];
（注意关键字extern）
这允许您在每个 .c 文件中使用相同的数组副本，其中包含 .h。
【讨论】：
【参考方案2】：静态变量“已定义但未使用”已通过将其声明移至相关库的 .c 文件来解决。示例：
.c - 文件
static const volatile menu_page** MENU_PAGE_TABLE_SRAM_BASE_OFFSET;
init_params()
MENU_PAGE_TABLE_SRAM_BASE_OFFSET = (menu_page**) 0x1C00;
在哪里
static const volatile menu_page** MENU_PAGE_TABLE_SRAM_BASE_OFFSET;
以前位于 .h 文件中
【讨论】：
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