在我使用FTGL在OpenGL项目中渲染字体时,遇到了错误提示:
g++ -o mygame Sample_GL3_2D.cpp glad.c -lGL -lglfw -ldl -lftgl -lSOIL -I /usr/include/freetype2 -L/usr/local/lib -lfreetype
/usr/local/lib/libftgl.so: undefined reference to `__glewGenBuffers'
/usr/local/lib/libftgl.so: undefined reference to `glewInit'
/usr/local/lib/libftgl.so: undefined reference to `__glewBindVertexArray'
/usr/local/lib/libftgl.so: undefined reference to `__glewBindBuffer'
/usr/local/lib/libftgl.so: undefined reference to `__glewUniform3f'
/usr/local/lib/libftgl.so: undefined reference to `__glewVertexAttribPointer'
/usr/local/lib/libftgl.so: undefined reference to `__glewBufferData'
/usr/local/lib/libftgl.so: undefined reference to `__glewDeleteBuffers'
/usr/local/lib/libftgl.so: undefined reference to `__glewDeleteVertexArrays'
/usr/local/lib/libftgl.so: undefined reference to `__glewGenVertexArrays'
/usr/local/lib/libftgl.so: undefined reference to `__glewEnableVertexAttribArray'
这是我的Makefile文件内容
all:mygame
mygame: Sample_GL3_2D.cpp glad.c
g++ -o mygame Sample_GL3_2D.cpp glad.c -lGL -lglfw -ldl -lftgl -lSOIL -I /usr/include/freetype2 -L/usr/local/lib -lfreetype
clean:
rm mygame
看起来这些错误是由libftgl.so库引起的。我已经使用ubuntu中的glew包安装了GLEW,但不明白为什么它没有被引用。