Include <unistd.h> for exit in utf8 locale test.
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@ -1781,6 +1781,7 @@ AC_MSG_CHECKING([for utf8 locale support])
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AC_RUN_IFELSE(
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[
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[AC_LANG_PROGRAM([[
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#include <locale.h>
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#include <locale.h>
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#include <unistd.h>
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]], [[
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]], [[
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char *loc = setlocale(LC_CTYPE, "en_US.UTF-8");
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char *loc = setlocale(LC_CTYPE, "en_US.UTF-8");
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if (loc != NULL)
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if (loc != NULL)
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