符号查找错误：未定义符号：FT_Get_Font_Format

Question

The error is

linux/FIT/fit: symbol lookup error: linux/FIT/fit: undefined symbol: FT_Get_Font_Format

This is part of an Android build.

It doesn't tell me which .so it searched.

I searched for that symbol

sudo grep -F "FT_Get_Font_Format" / -r --include="*.so*"

And it's in a bunch of .so files.

QUESTION

How do I find out which .so file it's looking for?

Answer 1

It doesn't tell me which .so it searched.

It searched all of the loaded libraries.

Unlike on Windows, the UNIX linker doesn't record which symbol is provided by which library, and the loader searches all currently loaded libraries (in order of their loading) for all of the symbols it needs to resolve.

I searched for that symbol sudo grep -F "FT_Get_Font_Format" / -r --include="*.so*"

That command does not distinguish between definition and references to the symbol, therefore this conclusion:

And it's in a bunch of .so files.

doesn't tell you anything useful.

The correct way to search for definition of the symbol would be:

find / -name '*.so*' -type f -print0 |
  xargs -o nm -AD | egrep ' [TDW] FT_Get_Font_Format'

Or you can just google it, and discover that it's part of FreeType API, and should be in libfreetype.so .

This answer suggests that your version of freetype may be too old.