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configure.in: use AC_CHECK_{FUNCS|HEADERS}_ONCE
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@ -113,7 +113,7 @@ AC_CHECK_HEADERS([ \
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],,AC_MSG_ERROR([required C header missing!]))
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# Optional header files
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AC_CHECK_HEADERS([ \
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AC_CHECK_HEADERS_ONCE([ \
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arpa/inet.h inttypes.h malloc.h netinet/ip.h stdbool.h stddef.h \
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stdint.h varargs.h \
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])
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@ -176,7 +176,7 @@ AC_CHECK_FUNCS([ \
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AC_MSG_ERROR([required function missing!]))
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# Optional functions
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AC_CHECK_FUNCS([ \
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AC_CHECK_FUNCS_ONCE([ \
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gai_strerror getaddrinfo getnameinfo inet_aton sigaction sigprocmask \
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snprintf vsnprintf strdup strlcpy strlcat strtok_r waitpid])
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