acsite.m4

   1 dnl This is copyright Rüdiger Kuhlmann <info@ruediger-kuhlmann.de>
   2
   3 AC_DEFUN([AC_FUNC_SNPRINTF],
   4 [AC_CHECK_FUNCS(snprintf vsnprintf)
   5 AC_MSG_CHECKING(for working snprintf)
   6 AC_CACHE_VAL(ac_cv_have_working_snprintf,
   7 [AC_TRY_RUN(
   8 [#include <stdio.h>
   9
  10 int main(void)
  11 {
  12     char bufs[5] = { 'x', 'x', 'x', '\0', '\0' };
  13     char bufd[5] = { 'x', 'x', 'x', '\0', '\0' };
  14     int i;
  15     i = snprintf (bufs, 2, "%s", "111");
  16     if (strcmp (bufs, "1")) exit (1);
  17     if (i != 3) exit (1);
  18     i = snprintf (bufd, 2, "%d", 111);
  19     if (strcmp (bufd, "1")) exit (1);
  20     if (i != 3) exit (1);
  21     exit(0);
  22 }], ac_cv_have_working_snprintf=yes, ac_cv_have_working_snprintf=no, ac_cv_have_working_snprintf=cross)])
  23 AC_MSG_RESULT([$ac_cv_have_working_snprintf])
  24 AC_MSG_CHECKING(for working vsnprintf)
  25 AC_CACHE_VAL(ac_cv_have_working_vsnprintf,
  26 [AC_TRY_RUN(
  27 [#include <stdio.h>
  28 #include <stdarg.h>
  29
  30 int my_vsnprintf (char *buf, const char *tmpl, ...)
  31 {
  32     int i;
  33     va_list args;
  34     va_start (args, tmpl);
  35     i = vsnprintf (buf, 2, tmpl, args);
  36     va_end (args);
  37     return i;
  38 }
  39
  40 int main(void)
  41 {
  42     char bufs[5] = { 'x', 'x', 'x', '\0', '\0' };
  43     char bufd[5] = { 'x', 'x', 'x', '\0', '\0' };
  44     int i;
  45     i = my_vsnprintf (bufs, "%s", "111");
  46     if (strcmp (bufs, "1")) exit (1);
  47     if (i != 3) exit (1);
  48     i = my_vsnprintf (bufd, "%d", 111);
  49     if (strcmp (bufd, "1")) exit (1);
  50     if (i != 3) exit (1);
  51     exit(0);
  52 }], ac_cv_have_working_vsnprintf=yes, ac_cv_have_working_vsnprintf=no, ac_cv_have_working_vsnprintf=cross)])
  53 AC_MSG_RESULT([$ac_cv_have_working_vsnprintf])
  54 if test x$ac_cv_have_working_snprintf$ac_cv_have_working_vsnprintf != "xyesyes"; then
  55   AC_LIBOBJ(snprintf)
  56   AC_MSG_WARN([Replacing missing/broken (v)snprintf() with version from http://www.ijs.si/software/snprintf/.])
  57   AC_DEFINE(PREFER_PORTABLE_SNPRINTF, 1, "enable replacement (v)snprintf if system (v)snprintf is broken")
  58 fi])
  59
  60 dnl This macro figures out what libraries are required on this platform to link
  61 dnl sockets programs. It's usually -lsocket and/or -lnsl or neither. We test for
  62 dnl all three combinations.
  63 dnl Copyright Warren Young <warren@etr-usa.com>
  64
  65 AC_DEFUN([ETR_SOCKET_NSL],
  66 [
  67 AC_CACHE_CHECK(for libraries containing socket functions,
  68 ac_cv_socket_libs, [
  69         oCFLAGS=$CFLAGS
  70
  71         AC_TRY_LINK([
  72                         #include <sys/types.h>
  73                         #include <sys/socket.h>
  74                         #include <netinet/in.h>
  75                         #include <arpa/inet.h>
  76                 ],
  77                 [
  78                         struct in_addr add;
  79                         int sd = socket(AF_INET, SOCK_STREAM, 0);
  80                         inet_ntoa(add);
  81                 ],
  82                 ac_cv_socket_libs=-lc, ac_cv_socket_libs=no)
  83
  84         if test x"$ac_cv_socket_libs" = "xno"
  85         then
  86                 CFLAGS="$oCFLAGS -lsocket"
  87                 AC_TRY_LINK([
  88                                 #include <sys/types.h>
  89                                 #include <sys/socket.h>
  90                                 #include <netinet/in.h>
  91                                 #include <arpa/inet.h>
  92                         ],
  93                         [
  94                                 struct in_addr add;
  95                                 int sd = socket(AF_INET, SOCK_STREAM, 0);
  96                                 inet_ntoa(add);
  97                         ],
  98                         ac_cv_socket_libs=-lsocket, ac_cv_socket_libs=no)
  99         fi
 100
 101         if test x"$ac_cv_socket_libs" = "xno"
 102         then
 103                 CFLAGS="$oCFLAGS -lsocket -lnsl"
 104                 AC_TRY_LINK([
 105                                 #include <sys/types.h>
 106                                 #include <sys/socket.h>
 107                                 #include <netinet/in.h>
 108                                 #include <arpa/inet.h>
 109                         ],
 110                         [
 111                                 struct in_addr add;
 112                                 int sd = socket(AF_INET, SOCK_STREAM, 0);
 113                                 inet_ntoa(add);
 114                         ],
 115                         ac_cv_socket_libs="-lsocket -lnsl", ac_cv_socket_libs=no)
 116         fi
 117
 118         CFLAGS=$oCFLAGS
 119 ])
 120
 121         if test x"$ac_cv_socket_libs" = "xno"
 122         then
 123                 AC_MSG_ERROR([Cannot find socket libraries])
 124         elif test x"$ac_cv_socket_libs" = "x-lc"
 125         then
 126                 ETR_SOCKET_LIBS=""
 127         else
 128                 ETR_SOCKET_LIBS="$ac_cv_socket_libs"
 129         fi
 130
 131         AC_SUBST(ETR_SOCKET_LIBS)
 132 ]) dnl ETR_SOCKET_NSL