prefix	= /usr
bindir	= /usr/bin
mandir	= /usr/man
infodir	= /usr/info
libungif check
  1st:
$$~test.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
    1 | main()
      | ^~~~
  2nd: -lX11 -L/usr/X11R6/lib
arm-buildroot-linux-uclibcgnueabi-gcc: ERROR: unsafe header/library path used in cross-compilation: '-L/usr/X11R6/lib'
libungif: no
libjpeg: disabled
libpng: disabled
bmp: yes
fb: /dev/fb0
LIBS	= 
#define IDSTRING "fbv 1.0b, s-tech"
#define DEFAULT_FRAMEBUFFER "/dev/fb0"
#define FBV_SUPPORT_GIF
#define FBV_SUPPORT_BMP