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.. _troubleshooting-makepanda-on-linux:

Troubleshooting makepanda on Linux
==================================

This page describes potential build issues that may arise when building
Panda3D using the Makepanda build system on the Linux platform, and possible
solutions.

Undefined reference to \`\_\_isoc99\_sscanf'
============================================


If you're building Panda3D on 64-bits linux, and run into this error:
::
    g++ -o built/bin/apply_patch -Lbuilt/lib -L/usr/X11R6/lib built/tmp/apply_patch_apply_patch.o
    -lpanda -lpandaexpress -lp3dtool -lp3dtoolconfig -lp3pystub -lz -lssl -lpthread -ldl
    built/lib/libpanda.so: undefined reference to `__isoc99_sscanf'
    collect2: ld returned 1 exit status
This error is related
to the ffmpeg thirdparty package, which has been compiled with a very recent
version of glibc. You either need to upgrade your system's glibc version
(recommended) or you can compile with --no-ffmpeg .