* Look for htons/htonl in netinet/in.h in addition to arpa/inet.h

* Implement htons/htonl in common.h just in case.

common.h

@@ -30,3 +30,37 @@ typedef long int intptr_t;
 typedef unsigned long int uintptr_t;
 #endif
 
+#if !defined(HAVE_HTONS) && !defined(HAVE_NETINET_IN_H)
+#   if defined(HAVE_ENDIAN_H)
+#       include <endian.h>
+#   endif
+static extern inline uint16_t htons(uint16_t x)
+{
+#if defined(HAVE_ENDIAN_H)
+    if(__BYTE_ORDER == __BIG_ENDIAN)
+#else
+    /* This is compile-time optimised with at least -O1 or -Os */
+    uint32_t const dummy = 0x12345678;
+    if(*(uint8_t const *)&dummy == 0x12)
+#endif
+        return x;
+    else
+        return (x >> 8) | (x << 8);
+}
+
+static extern inline uint32_t htonl(uint32_t x)
+{
+#if defined(HAVE_ENDIAN_H)
+    if(__BYTE_ORDER == __BIG_ENDIAN)
+#else
+    /* This is compile-time optimised with at least -O1 or -Os */
+    uint32_t const dummy = 0x12345678;
+    if(*(uint8_t const *)&dummy == 0x12)
+#endif
+        return x;
+    else
+        return (x >> 24) | ((x >> 8) & 0x0000ff00)
+                | ((x << 8) & 0x00ff0000) | (x << 24);
+}
+#endif
+

configure.ac

@@ -61,7 +61,7 @@ dnl conditional builds
 AC_ARG_ENABLE(doc,
   [  --enable-doc            build documentation (needs doxygen and LaTeX)])
 
-AC_CHECK_HEADERS(stdio.h stdarg.h signal.h sys/ioctl.h sys/time.h inttypes.h endian.h unistd.h arpa/inet.h)
+AC_CHECK_HEADERS(stdio.h stdarg.h signal.h sys/ioctl.h sys/time.h inttypes.h endian.h unistd.h arpa/inet.h netinet/in.h)
 AC_CHECK_FUNCS(signal ioctl vsnprintf getenv putenv strcasecmp htons)
 AC_CHECK_FUNCS(usleep gettimeofday)
 

cucul/font.c

@@ -25,6 +25,8 @@
 #   endif
 #   if defined(HAVE_ARPA_INET_H)
 #       include <arpa/inet.h>
+#   elif defined(HAVE_NETINET_IN_H)
+#       include <netinet/in.h>
 #   endif
 #   include <stdio.h>
 #   include <stdlib.h>

tools/makefont.c

@@ -23,6 +23,8 @@
 
 #if defined(HAVE_ARPA_INET_H)
 #   include <arpa/inet.h>
+#elif defined(HAVE_NETINET_IN_H)
+#   include <netinet/in.h>
 #endif
 
 #include <pango/pango.h>