Support operating systems without some non-POSIX headers

The arpa/nameser.h, netinet/ip.h, and resolv.h headers are not crucial
to building LibreSSL. The netinet/ip.h header is used in nc(1) for
optional IPTOS_ features that can be ifdef'd on systems without support.

The endian.h header is the upcoming standard header and should be used
whenever available and correct. The machine/endian.h header is
non-standard and doesn't have to exist on POSIX systems.

Fix the check for getpagesize(3) not forward declaring the function,
such that CFLAGS with -Werror=implicit-function-declaration doesn't
cause the check to fail.

1 files changed, 1 insertions, 1 deletions

diff --git a/include/compat/resolv.h b/include/compat/resolv.h
index 42dec07..b804460 100644
--- a/include/compat/resolv.h
+++ b/include/compat/resolv.h
@@ -12,7 +12,7 @@
 #else
 #include <../include/resolv.h>
 #endif
-#else
+#elif defined(HAVE_RESOLV_H)
 #include_next <resolv.h>
 #endif