mxcl/homebrew — pull request #14646 by dustin (2012-09-02 18:28:21+00:00)
Title: Graphviz depends on gd

I was having build problems with graphviz on 10.8 for a while before installing `X11` and `gd`. I can reproduce a build failure by removing `gd`, but it works fine with it.

```
Undefined symbols for architecture x86_64:
"_FT_Activate_Size", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Attach_File", referenced from:
_fontFetch in gdft.o
"_FT_Done_Face", referenced from:
_fontRelease in gdft.o
"_FT_Done_FreeType", referenced from:
_gdFontCacheShutdown in gdft.o
"_FT_Done_Glyph", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Done_Size", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Get_Char_Index", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Get_Glyph", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Get_Kerning", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Glyph_To_Bitmap", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Init_FreeType", referenced from:
_gdFontCacheSetup in gdft.o
"_FT_Load_Glyph", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_New_Face", referenced from:
_fontFetch in gdft.o
"_FT_New_Size", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Set_Char_Size", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Set_Charmap", referenced from:
_gdImageStringFTEx in gdft.o
"_FT_Set_Transform", referenced from:
_gdImageStringFTEx in gdft.o
"_FcConfigSubstitute", referenced from:
_fontFetch in gdft.o
"_FcDefaultSubstitute", referenced from:
_fontFetch in gdft.o
"_FcFontMatch", referenced from:
_fontFetch in gdft.o
"_FcNameParse", referenced from:
_fontFetch in gdft.o
"_FcPatternDestroy", referenced from:
_fontFetch in gdft.o
"_FcPatternGetString", referenced from:
_fontFetch in gdft.o
"_png_check_sig", referenced from:
_gdImageCreateFromPngCtx in gd_png.o
ld: symbol(s) not found for architecture x86_64
```