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a/src/configure.ac b/src/configure.ac
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AC_SYS_LARGEFILE
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AC_SYS_LARGEFILE
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# OpenBSD needs sys/param.h for mount.h to compile
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# OpenBSD needs sys/param.h for mount.h to compile
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AC_CHECK_HEADERS([sys/param.h, spawn.h])
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AC_CHECK_HEADERS([sys/param.h, spawn.h])
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AC_CHECK_FUNCS([posix_spawn, setrlimit])
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AC_CHECK_FUNCS([posix_spawn setrlimit kqueue])
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if test "x$ac_cv_func_posix_spawn" = xyes; then :
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if test "x$ac_cv_func_posix_spawn" = xyes; then :
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   AC_ARG_ENABLE(posix_spawn,
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   AC_ARG_ENABLE(posix_spawn,
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    AC_HELP_STRING([--enable-posix_spawn],
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    AC_HELP_STRING([--enable-posix_spawn],
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   [Enable the use of posix_spawn().]),
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   [Enable the use of posix_spawn().]),