我正在尝试编译原始 doom 的源代码作为学习 C 的一种方式。我从github下载了它并修复了 i_video.c 第 49 行(errnos.h -> errno.h)中的一个明显错误。
我现在明白了:
m_misc.c:257:5: warning: initialization from incompatible pointer type [enabled by default]
m_misc.c:257:5: warning: (near initialization for ‘defaults[14].location’) [enabled by default]
m_misc.c:257:5: error: initializer element is not computable at load time
m_misc.c:257:5: error: (near initialization for ‘defaults[14].defaultvalue’)
m_misc.c:264:35: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:264:5: error: initializer element is not constant
m_misc.c:264:5: error: (near initialization for ‘defaults[16].defaultvalue’)
m_misc.c:265:37: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:265:5: error: initializer element is not constant
m_misc.c:265:5: error: (near initialization for ‘defaults[17].defaultvalue’)
m_misc.c:288:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:288:5: error: initializer element is not constant
m_misc.c:288:5: error: (near initialization for ‘defaults[31].defaultvalue’)
m_misc.c:289:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:289:5: error: initializer element is not constant
m_misc.c:289:5: error: (near initialization for ‘defaults[32].defaultvalue’)
m_misc.c:290:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:290:5: error: initializer element is not constant
m_misc.c:290:5: error: (near initialization for ‘defaults[33].defaultvalue’)
m_misc.c:291:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:291:5: error: initializer element is not constant
m_misc.c:291:5: error: (near initialization for ‘defaults[34].defaultvalue’)
m_misc.c:292:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:292:5: error: initializer element is not constant
m_misc.c:292:5: error: (near initialization for ‘defaults[35].defaultvalue’)
m_misc.c:293:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:293:5: error: initializer element is not constant
m_misc.c:293:5: error: (near initialization for ‘defaults[36].defaultvalue’)
m_misc.c:294:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:294:5: error: initializer element is not constant
m_misc.c:294:5: error: (near initialization for ‘defaults[37].defaultvalue’)
m_misc.c:295:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:295:5: error: initializer element is not constant
m_misc.c:295:5: error: (near initialization for ‘defaults[38].defaultvalue’)
m_misc.c:296:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:296:5: error: initializer element is not constant
m_misc.c:296:5: error: (near initialization for ‘defaults[39].defaultvalue’)
m_misc.c:297:45: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
m_misc.c:297:5: error: initializer element is not constant
m_misc.c:297:5: error: (near initialization for ‘defaults[40].defaultvalue’)
m_misc.c: In function ‘M_LoadDefaults’:
m_misc.c:395:5: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
make: *** [linux/m_misc.o] Error 1
在此声明期间的 m_misc.c 文件中包含强制转换的行:
default_t defaults[] =
{
{"mouse_sensitivity",&mouseSensitivity, 5},
{"sfx_volume",&snd_SfxVolume, 8},
{"music_volume",&snd_MusicVolume, 8},
{"show_messages",&showMessages, 1},
#ifdef NORMALUNIX
{"key_right",&key_right, KEY_RIGHTARROW},
{"key_left",&key_left, KEY_LEFTARROW},
{"key_up",&key_up, KEY_UPARROW},
{"key_down",&key_down, KEY_DOWNARROW},
{"key_strafeleft",&key_strafeleft, ','},
{"key_straferight",&key_straferight, '.'},
{"key_fire",&key_fire, KEY_RCTRL},
{"key_use",&key_use, ' '},
{"key_strafe",&key_strafe, KEY_RALT},
{"key_speed",&key_speed, KEY_RSHIFT},
// UNIX hack, to be removed.
#ifdef SNDSERV
{"sndserver", (int *) &sndserver_filename, (int) "sndserver"},
{"mb_used", &mb_used, 2},
#endif
#endif
#ifdef LINUX
{"mousedev", (int*)&mousedev, (int)"/dev/ttyS0"},
{"mousetype", (int*)&mousetype, (int)"microsoft"},
#endif
{"use_mouse",&usemouse, 1},
{"mouseb_fire",&mousebfire,0},
{"mouseb_strafe",&mousebstrafe,1},
{"mouseb_forward",&mousebforward,2},
{"use_joystick",&usejoystick, 0},
{"joyb_fire",&joybfire,0},
{"joyb_strafe",&joybstrafe,1},
{"joyb_use",&joybuse,3},
{"joyb_speed",&joybspeed,2},
{"screenblocks",&screenblocks, 9},
{"detaillevel",&detailLevel, 0},
{"snd_channels",&numChannels, 3},
{"usegamma",&usegamma, 0},
{"chatmacro0", (int *) &chat_macros[0], (int) HUSTR_CHATMACRO0 },
{"chatmacro1", (int *) &chat_macros[1], (int) HUSTR_CHATMACRO1 },
{"chatmacro2", (int *) &chat_macros[2], (int) HUSTR_CHATMACRO2 },
{"chatmacro3", (int *) &chat_macros[3], (int) HUSTR_CHATMACRO3 },
{"chatmacro4", (int *) &chat_macros[4], (int) HUSTR_CHATMACRO4 },
{"chatmacro5", (int *) &chat_macros[5], (int) HUSTR_CHATMACRO5 },
{"chatmacro6", (int *) &chat_macros[6], (int) HUSTR_CHATMACRO6 },
{"chatmacro7", (int *) &chat_macros[7], (int) HUSTR_CHATMACRO7 },
{"chatmacro8", (int *) &chat_macros[8], (int) HUSTR_CHATMACRO8 },
{"chatmacro9", (int *) &chat_macros[9], (int) HUSTR_CHATMACRO9 }
};
这与现代编译器不兼容吗?有没有人设法通过它?