当我尝试在 Ubuntu 13.10 上安装 gosu 时出现此错误
Fetching gem metadata from https://rubygems.org/.........
Fetching version metadata from https://rubygems.org/..
Resolving dependencies...
Using diff-lcs 1.2.5
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/bin/ruby1.9.1 extconf.rb
The Gosu gem requires some libraries to be installed system-wide.
See the following site for a list:
https://github.com/jlnr/gosu/wiki/Getting-Started-on-Linux
checking for TTF_RenderUTF8_Blended() in -lSDL2_ttf... yes
checking for SDL_ttf.h... yes
checking for FreeImage_ConvertFromRawBits() in -lfreeimage... yes
checking for FreeImage.h... yes
checking for main() in -lopenal... no
creating Makefile
make
compiling gosu_wrap.cxx
In file included from /usr/include/ruby-1.9.1/ruby.h:32:0,
from gosu_wrap.cxx:850:
gosu_wrap.cxx: In function ‘void Gosu::loadBitmap(Gosu::Bitmap&, VALUE)’:
/usr/include/ruby-1.9.1/ruby/ruby.h:675:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
RSTRING(str)->as.heap.len)
^
我尝试从https://github.com/jlnr/gosu/wiki/Getting-Started-on-Linux添加每个库，但我仍然收到上述错误。谁能帮我解决这个问题？
编辑：当我检查已安装软件包的状态时
dpkg -s gcc libsdl2-dev libsdl2-ttf-dev libpango1.0-dev libgl1-mesa-dev libfreeimage-dev libopenal-dev libsndfile-dev | grep Status
我得到以下状态：
Status: install ok installed
dpkg-query: package 'libsdl2-ttf-dev' is not installed and no information is available
Status: install ok installed
Status: install ok installed
Status: install ok installed
dpkg-query: package 'libopenal-dev' is not installed and no information is available
Status: install ok installed
dpkg-query: package 'libsndfile-dev' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
因此，未安装 libsdl2-ttf-dev 和 libsndfile-dev。我尝试使用 安装这些软件包apt-get install，但无法安装它们，因为它说在任何来源中都找不到这些软件包。