/usr/bin/ld: impossibile trovare /home/paz/cinelerra5/cinelerra-5.1/mpeg2enc/../thirdparty/flac-1.3.2/src/test_libs

_common/.libs/libtest_libs_common.a: File o directory non esistente

i guess you forgot to alter configure.ac, re-run autgon.sh and may be move away flac 1.3.2 tar from thirdparty/src (so build system become confused about where flac libs actually located)

can you (or Phyllis)  post your git diff ?