without link.txt

/usr/local/djgpp/bin/i586-pc-msdosdjgpp-gcc -o dist/main.exe src/main.o
src/main.o:main.c:(.text+0x15): undefined reference to `_install_allegro_version_check'
src/main.o:main.c:(.text+0x25): undefined reference to `system_driver'
src/main.o:main.c:(.text+0x31): undefined reference to `system_driver'
src/main.o:main.c:(.text+0x4d): undefined reference to `system_driver'
src/main.o:main.c:(.text+0x59): undefined reference to `system_driver'
src/main.o:main.c:(.text+0x72): undefined reference to `system_driver'
src/main.o:main.c:(.text+0x7e): more undefined references to `system_driver' follow
src/main.o:main.c:(.text+0x101): undefined reference to `gfx_driver'
src/main.o:main.c:(.text+0x1fe): undefined reference to `screen'
src/main.o:main.c:(.text+0x2b2): undefined reference to `screen'
src/main.o:main.c:(.text+0x2cc): undefined reference to `screen'
src/main.o:main.c:(.text+0x3be): undefined reference to `_rgb_r_shift_15'
src/main.o:main.c:(.text+0x3cf): undefined reference to `_rgb_g_shift_15'
src/main.o:main.c:(.text+0x3e4): undefined reference to `_rgb_b_shift_15'
src/main.o:main.c:(.text+0x400): undefined reference to `_rgb_r_shift_16'
src/main.o:main.c:(.text+0x411): undefined reference to `_rgb_g_shift_16'
src/main.o:main.c:(.text+0x426): undefined reference to `_rgb_b_shift_16'
src/main.o:main.c:(.text+0x43a): undefined reference to `_rgb_r_shift_24'
src/main.o:main.c:(.text+0x448): undefined reference to `_rgb_g_shift_24'
src/main.o:main.c:(.text+0x458): undefined reference to `_rgb_b_shift_24'
src/main.o:main.c:(.text+0x46f): undefined reference to `_rgb_r_shift_32'
src/main.o:main.c:(.text+0x47d): undefined reference to `_rgb_g_shift_32'
src/main.o:main.c:(.text+0x48d): undefined reference to `_rgb_b_shift_32'
src/main.o:main.c:(.text+0x4a4): undefined reference to `_rgb_r_shift_32'
src/main.o:main.c:(.text+0x4b2): undefined reference to `_rgb_g_shift_32'
src/main.o:main.c:(.text+0x4c2): undefined reference to `_rgb_b_shift_32'
src/main.o:main.c:(.text+0x4d2): undefined reference to `_rgb_a_shift_32'
src/main.o:main.c:(.text+0x4ed): undefined reference to `_current_palette'
src/main.o:main.c:(.text+0x4f9): undefined reference to `_rgb_scale_6'
src/main.o:main.c:(.text+0x508): undefined reference to `_current_palette'
src/main.o:main.c:(.text+0x514): undefined reference to `_rgb_scale_6'
src/main.o:main.c:(.text+0x523): undefined reference to `_current_palette'
src/main.o:main.c:(.text+0x52f): undefined reference to `_rgb_scale_6'
src/main.o:main.c:(.text+0x539): undefined reference to `_rgb_r_shift_15'
src/main.o:main.c:(.text+0x54c): undefined reference to `_rgb_scale_5'
src/main.o:main.c:(.text+0x556): undefined reference to `_rgb_g_shift_15'
src/main.o:main.c:(.text+0x569): undefined reference to `_rgb_scale_5'
src/main.o:main.c:(.text+0x573): undefined reference to `_rgb_b_shift_15'
src/main.o:main.c:(.text+0x586): undefined reference to `_rgb_scale_5'
src/main.o:main.c:(.text+0x590): undefined reference to `_rgb_r_shift_16'
src/main.o:main.c:(.text+0x5a3): undefined reference to `_rgb_scale_5'
src/main.o:main.c:(.text+0x5ad): undefined reference to `_rgb_g_shift_16'
src/main.o:main.c:(.text+0x5c0): undefined reference to `_rgb_scale_6'
src/main.o:main.c:(.text+0x5ca): undefined reference to `_rgb_b_shift_16'
src/main.o:main.c:(.text+0x5dd): undefined reference to `_rgb_scale_5'
src/main.o:main.c:(.text+0x5e7): undefined reference to `_rgb_r_shift_24'
src/main.o:main.c:(.text+0x5ff): undefined reference to `_rgb_g_shift_24'
src/main.o:main.c:(.text+0x617): undefined reference to `_rgb_b_shift_24'
src/main.o:main.c:(.text+0x62f): undefined reference to `_rgb_r_shift_32'
src/main.o:main.c:(.text+0x647): undefined reference to `_rgb_g_shift_32'
src/main.o:main.c:(.text+0x65f): undefined reference to `_rgb_b_shift_32'
src/main.o:main.c:(.text+0x677): undefined reference to `_rgb_a_shift_32'
src/main.o:main.c:(.text+0x1422): undefined reference to `allegro_errno'
src/main.o:main.c:(.text+0x1450): undefined reference to `allegro_errno'
src/main.o:main.c:(.text+0x148a): undefined reference to `allegro_errno'
src/main.o:main.c:(.text+0x14e2): undefined reference to `allegro_errno'
src/main.o:main.c:(.text+0x1513): undefined reference to `allegro_errno'
src/main.o:main.c:(.text+0x155c): more undefined references to `allegro_errno' follow
src/main.o:main.c:(.text+0x1662): undefined reference to `_cos_tbl'
src/main.o:main.c:(.text+0x167e): undefined reference to `_cos_tbl'
src/main.o:main.c:(.text+0x169a): undefined reference to `_tan_tbl'
src/main.o:main.c:(.text+0x16b6): undefined reference to `allegro_errno'
src/main.o:main.c:(.text+0x16d5): undefined reference to `_acos_tbl'
src/main.o:main.c:(.text+0x16f1): undefined reference to `allegro_errno'
src/main.o:main.c:(.text+0x1710): undefined reference to `_acos_tbl'
src/main.o:main.c:(.text+0x1860): undefined reference to `_persp_xscale'
src/main.o:main.c:(.text+0x187f): undefined reference to `_persp_xoffset'
src/main.o:main.c:(.text+0x188c): undefined reference to `_persp_yscale'
src/main.o:main.c:(.text+0x18ab): undefined reference to `_persp_yoffset'
src/main.o:main.c:(.text+0x18d2): undefined reference to `_persp_xscale_f'
src/main.o:main.c:(.text+0x18da): undefined reference to `_persp_xoffset_f'
src/main.o:main.c:(.text+0x18ed): undefined reference to `_persp_yscale_f'
src/main.o:main.c:(.text+0x18f5): undefined reference to `_persp_yoffset_f'
src/main.o:main.c:(.text+0x191f): undefined reference to `file_select_ex'
src/main.o:main.c:(.text+0x192f): undefined reference to `_textmode'
src/main.o:main.c:(.text+0x194a): undefined reference to `textout_ex'
src/main.o:main.c:(.text+0x195b): undefined reference to `_textmode'
src/main.o:main.c:(.text+0x1976): undefined reference to `textout_centre_ex'
src/main.o:main.c:(.text+0x1987): undefined reference to `_textmode'
src/main.o:main.c:(.text+0x19a2): undefined reference to `textout_right_ex'
src/main.o:main.c:(.text+0x19b3): undefined reference to `_textmode'
src/main.o:main.c:(.text+0x19d4): undefined reference to `textout_justify_ex'
src/main.o:main.c:(.text+0x19e5): undefined reference to `_textmode'
src/main.o:main.c:(.text+0x1a0e): undefined reference to `_textmode'
src/main.o:main.c:(.text+0x1a29): undefined reference to `gui_textout_ex'
src/main.o:main.c:(.text+0x1a49): undefined reference to `set_close_button_callback'
src/main.o:main.c:(.text+0x1a5a): undefined reference to `system_driver'
src/main.o:main.c:(.text+0x1a66): undefined reference to `system_driver'
src/main.o:main.c:(.text+0x1aef): undefined reference to `_current_palette'
src/main.o:main.c:(.text+0x1b4e): undefined reference to `_install_allegro_version_check'
src/main.o:main.c:(.text+0x1b64): undefined reference to `install_keyboard'
src/main.o:main.c:(.text+0x1b7c): undefined reference to `set_gfx_mode'
src/main.o:main.c:(.text+0x1b9e): undefined reference to `set_gfx_mode'
src/main.o:main.c:(.text+0x1bb7): undefined reference to `set_gfx_mode'
src/main.o:main.c:(.text+0x1bc2): undefined reference to `allegro_error'
src/main.o:main.c:(.text+0x1bcc): undefined reference to `allegro_message'
src/main.o:main.c:(.text+0x1be1): undefined reference to `desktop_palette'
src/main.o:main.c:(.text+0x1be6): undefined reference to `set_palette'
src/main.o:main.c:(.text+0x1c00): undefined reference to `makecol'
src/main.o:main.c:(.text+0x1c0a): undefined reference to `screen'
src/main.o:main.c:(.text+0x1c2a): undefined reference to `makecol'
src/main.o:main.c:(.text+0x1c34): undefined reference to `gfx_driver'
src/main.o:main.c:(.text+0x1c3d): undefined reference to `gfx_driver'
src/main.o:main.c:(.text+0x1c57): undefined reference to `gfx_driver'
src/main.o:main.c:(.text+0x1c60): undefined reference to `gfx_driver'
src/main.o:main.c:(.text+0x1c7b): undefined reference to `font'
src/main.o:main.c:(.text+0x1c80): undefined reference to `screen'
src/main.o:main.c:(.text+0x1c94): undefined reference to `textout_centre_ex'
src/main.o:main.c:(.text+0x1ca1): undefined reference to `readkey'
/usr/local/djgpp/lib/gcc/i586-pc-msdosdjgpp/5.2.0/../../../../i586-pc-msdosdjgpp/bin/ld: src/main.o: bad reloc address 0x20 in section `.eh_frame'
/usr/local/djgpp/lib/gcc/i586-pc-msdosdjgpp/5.2.0/../../../../i586-pc-msdosdjgpp/bin/ld: final link failed: Invalid operation
collect2: error: ld returned 1 exit status