checking for compress in -lz... (cached) yes
checking for png_info_init in -lpng... (cached) yes
checking for gdImageCreateFromPng in -lgd... (cached) no
checking for gdImageCreateFromJpeg in -lgd... (cached) no
checking for gdImageCreateFromGif in -lgd... (cached) no
checking for gdImageLzw in -lgd... (cached) no
checking for gdImageColorResolve in -lgd... (cached) yes
checking for gdImageString16 in -lgd... (cached) yes
checking whether to include GD support... no
checking whether to include FreeType support... yes
configure: warning: No gd support found. Skipping FreeType Configuration

I can compile gcc -o a a.c -lpng -lm -lgd :
char gdImageCreateFromPng();

int main() {
gdImageCreateFromPng()
; return 0; }