build: avoid getifaddrs when unavailable

theuni · Fuzzbawls · commit 3a039d62cb46 · 2021-04-13T21:00:30.000-07:00
diff --git a/configure.ac b/configure.ac
@@ -751,6 +751,10 @@ fi
 
 AC_CHECK_HEADERS([endian.h sys/endian.h byteswap.h stdio.h stdlib.h unistd.h strings.h sys/types.h sys/stat.h sys/select.h sys/prctl.h sys/sysctl.h vm/vm_param.h sys/vmmeter.h sys/resources.h])
 
+AC_CHECK_DECLS([getifaddrs, freeifaddrs],,,
+    [#include <sys/types.h>
+    #include <ifaddrs.h>]
+)
 AC_CHECK_DECLS([strnlen])
 
 # Check for daemon(3), unrelated to --with-daemon (although used by it)
diff --git a/src/net.cpp b/src/net.cpp
@@ -2007,7 +2007,7 @@ void Discover()
             }
         }
     }
-#else
+#elif (HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS)
     // Get local host ip
     struct ifaddrs* myaddrs;
     if (getifaddrs(&myaddrs) == 0) {

Original file line number	Diff line number	Diff line change
`@@ -2007,7 +2007,7 @@ void Discover()`
`2007`	`2007`	`}`
`2008`	`2008`	`}`
`2009`	`2009`	`}`
`2010`		`-#else`
	`2010`	`+#elif (HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS)`
`2011`	`2011`	`// Get local host ip`
`2012`	`2012`	`struct ifaddrs* myaddrs;`
`2013`	`2013`	`if (getifaddrs(&myaddrs) == 0) {`