Merge commit 'ec903058'

* commit 'ec903058':
  configure: Simplify clock_gettime() test

nanosleep check also updated.
Merged-by: Clément Bœsch <u@pkh.me>

configure

@@ -5580,7 +5580,8 @@ check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
 
 check_func  access
 check_func_headers stdlib.h arc4random
-check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
+check_func_headers time.h clock_gettime ||
+    { check_lib2 time.h clock_gettime -lrt && LIBRT="-lrt"; }
 check_func  fcntl
 check_func  fork
 check_func  gethrtime
@@ -5593,7 +5594,8 @@ check_func  mkstemp
 check_func  mmap
 check_func  mprotect
 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
-check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
+check_func_headers time.h nanosleep ||
+    { check_lib2 time.h nanosleep -lrt && LIBRT="-lrt"; }
 check_func  sched_getaffinity
 check_func  setrlimit
 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE