configure.in: use AC_CHECK_{FUNCS|HEADERS}_ONCE

diff --git a/configure.in b/configure.in
index 468e927b4644088c82fae7b83ab3d84fbe10df9e..23b50cd7108a2db1cfd56c4c1d940b0b218839f6 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -113,7 +113,7 @@ AC_CHECK_HEADERS([ \
        ],,AC_MSG_ERROR([required C header missing!]))
 
 # Optional header files
        ],,AC_MSG_ERROR([required C header missing!]))
 
 # Optional header files

-AC_CHECK_HEADERS([ \
+AC_CHECK_HEADERS_ONCE([ \

        arpa/inet.h inttypes.h malloc.h netinet/ip.h stdbool.h stddef.h \
        stdint.h varargs.h \
        ])
        arpa/inet.h inttypes.h malloc.h netinet/ip.h stdbool.h stddef.h \
        stdint.h varargs.h \
        ])


@@ -176,7 +176,7 @@ AC_CHECK_FUNCS([ \
        AC_MSG_ERROR([required function missing!]))
 
 # Optional functions
        AC_MSG_ERROR([required function missing!]))
 
 # Optional functions

-AC_CHECK_FUNCS([ \
+AC_CHECK_FUNCS_ONCE([ \

        gai_strerror getaddrinfo getnameinfo inet_aton sigaction sigprocmask \
        snprintf vsnprintf strdup strlcpy strlcat strtok_r waitpid])
 
        gai_strerror getaddrinfo getnameinfo inet_aton sigaction sigprocmask \
        snprintf vsnprintf strdup strlcpy strlcat strtok_r waitpid])