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--- coreutils-8.22.orig/m4/spawn_h.m4 2013-12-04 15:53:33.000000000 +0100
+++ coreutils-8.22/m4/spawn_h.m4 2014-02-21 15:19:26.000000000 +0100
@@ -64,7 +64,14 @@ AC_DEFUN([gl_HAVE_POSIX_SPAWN],
dnl once only, before all statements that occur in other macros.
AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
- AC_CHECK_FUNCS_ONCE([posix_spawn])
+ LIB_POSIX_SPAWN=
+ AC_SUBST([LIB_POSIX_SPAWN])
+ gl_saved_libs=$LIBS
+ AC_SEARCH_LIBS([posix_spawn], [rt],
+ [test "$ac_cv_search_posix_spawn" = "none required" ||
+ LIB_POSIX_SPAWN=$ac_cv_search_posix_spawn])
+ AC_CHECK_FUNCS([posix_spawn])
+ LIBS=$gl_saved_libs
if test $ac_cv_func_posix_spawn != yes; then
HAVE_POSIX_SPAWN=0
fi
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