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configure: call flatten_extralibs in a subshell

By putting the call in a subshell, the problem of it spilling
cleanup-decision from a previous library to other libraries is avoided.

For example, it could have already cleaned up cuda_extralibs in a
previous library that depended on cuda. Then when it gets to avutil, it
will never pick up the dependency of avutil to cuda, which depends on
libdl, which in turn results in a missing -ldl extralib, resulting in
link failures in certain configurations.

pull/272/head

Timo Rothenpieler 7 years ago

parent edef07569c

commit 4fb20d4e3a

1 changed files with 10 additions and 4 deletions

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