[SCM] libav/experimental: configure: Check for nanosleep in headers as well, not only in libs

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 72199e1041b4052544e181ad90b431ca6704da12
Author: Martin Storsjö <martin at martin.st>
Date:   Mon Aug 11 15:02:28 2014 +0300

    configure: Check for nanosleep in headers as well, not only in libs
    
    On mingw64 with c++11 support, the link libraries do contain a
    nanosleep function, while it isn't exposed via the headers. Using
    check_func_headers instead of a plain check_func fixes this
    misdetection.
    
    Signed-off-by: Martin Storsjö <martin at martin.st>

diff --git a/configure b/configure
index a5ad34c..c073f30 100755
--- a/configure
+++ b/configure
@@ -4046,7 +4046,7 @@ check_func  mkstemp
 check_func  mmap
 check_func  mprotect
 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
-check_func  nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
+check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
 check_func  sched_getaffinity
 check_func  setrlimit
 check_func  strerror_r

-- 
Libav/FFmpeg packaging