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-rw-r--r--configure.in3
1 files changed, 2 insertions, 1 deletions
diff --git a/configure.in b/configure.in
index cd055da3d6..bf81905f0a 100644
--- a/configure.in
+++ b/configure.in
@@ -1351,7 +1351,8 @@ AC_CHECK_FUNCS(fmod killpg wait4 waitpid fork spawnv syscall __syscall chroot ge
setsid telldir seekdir fchmod cosh sinh tanh log2 round\
setuid setgid daemon select_large_fdset setenv unsetenv\
mktime timegm gmtime_r clock_gettime gettimeofday poll ppoll\
- pread sendfile shutdown sigaltstack dl_iterate_phdr)
+ pread sendfile shutdown sigaltstack dl_iterate_phdr\
+ dup3)
AC_CACHE_CHECK(for unsetenv returns a value, rb_cv_unsetenv_return_value,
[AC_TRY_COMPILE([