$ nm *.so | grep "U gl" | sort -u
U glActiveTexture
U glAttachShader
U glBindAttribLocation
U glBindBuffer
U glBindFramebuffer
U glBindRenderbuffer
U glBindTexture
U glBlendColor
U glBlendEquation
U glBlendEquationSeparate
U glBlendFunc
U glBlendFuncSeparate
U glBufferData
U glBufferSubData
U glCheckFramebufferStatus
U glClear
U glClearColor
U glClearStencil
U glColorMask
U glCompileShader
U glCompressedTexImage2D
U glCompressedTexSubImage2D
U glCopyTexImage2D
U glCopyTexSubImage2D
U glCreateProgram
U glCreateShader
U glCullFace
U glDeleteBuffers
U glDeleteFramebuffers
U glDeleteProgram
U glDeleteRenderbuffers
U glDeleteShader
U glDeleteTextures
U glDepthFunc
U glDepthMask
U glDetachShader
U glDisable
U glDisableVertexAttribArray
U glDrawArrays
U glDrawElements
U glEnable
U glEnableVertexAttribArray
U glFinish
U glFlush
U glFramebufferRenderbuffer
U glFramebufferTexture2D
U glFrontFace
U glGenBuffers
U glGenFramebuffers
U glGenRenderbuffers
U glGenTextures
U glGenerateMipmap
U glGetActiveAttrib
U glGetActiveUniform
U glGetAttachedShaders
U glGetAttribLocation
U glGetBooleanv
U glGetBufferParameteriv
U glGetError
U glGetFloatv
U glGetFramebufferAttachmentParameteriv
U glGetIntegerv
U glGetProgramInfoLog
U glGetProgramiv
U glGetRenderbufferParameteriv
U glGetShaderInfoLog
U glGetShaderSource
U glGetShaderiv
U glGetString
U glGetTexParameterfv
U glGetTexParameteriv
U glGetUniformLocation
U glGetUniformfv
U glGetUniformiv
U glGetVertexAttribPointerv
U glGetVertexAttribfv
U glGetVertexAttribiv
U glHint
U glIsBuffer
U glIsEnabled
U glIsFramebuffer
U glIsProgram
U glIsRenderbuffer
U glIsShader
U glIsTexture
U glLineWidth
U glLinkProgram
U glPixelStorei
U glPolygonOffset
U glReadPixels
U glRenderbufferStorage
U glSampleCoverage
U glScissor
U glShaderSource
U glStencilFunc
U glStencilFuncSeparate
U glStencilMask
U glStencilMaskSeparate
U glStencilOp
U glStencilOpSeparate
U glTexImage2D
U glTexParameterf
U glTexParameterfv
U glTexParameteri
U glTexParameteriv
U glTexSubImage2D
U glUniform1f
U glUniform1fv
U glUniform1i
U glUniform1iv
U glUniform2f
U glUniform2fv
U glUniform2i
U glUniform2iv
U glUniform3f
U glUniform3fv
U glUniform3i
U glUniform3iv
U glUniform4f
U glUniform4fv
U glUniform4i
U glUniform4iv
U glUniformMatrix2fv
U glUniformMatrix3fv
U glUniformMatrix4fv
U glUseProgram
U glValidateProgram
U glVertexAttrib1f
U glVertexAttrib1fv
U glVertexAttrib2f
U glVertexAttrib2fv
U glVertexAttrib3f
U glVertexAttrib3fv
U glVertexAttrib4f
U glVertexAttrib4fv
U glVertexAttribPointer
U glViewport