configure: test for vsnprintf to ease enabling unac debugging traces
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@ -105,6 +105,9 @@
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/* Define to 1 if you have the <unistd.h> header file. */
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#undef HAVE_UNISTD_H
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/* Define to 1 if you have the `vsnprintf' function. */
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#undef HAVE_VSNPRINTF
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/* Define as const if the declaration of iconv() needs const. */
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#undef ICONV_CONST
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@ -37,7 +37,7 @@ AC_SYS_LARGEFILE
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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_FUNCS([posix_spawn setrlimit kqueue])
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AC_CHECK_FUNCS([posix_spawn setrlimit kqueue vsnprintf])
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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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