configure.in

dnl Process this file with autoconf to produce a configure script.
AC_INIT(tcptrace.c)

AC_CANONICAL_SYSTEM

AC_LBL_C_INIT(V_CCOPT, V_INCLS)

dnl Checks for programs.
AC_PROG_CC
AC_PROG_MAKE_SET

AC_PROG_LEX
AC_PROG_YACC

dnl Checks for libraries.
dnl Replace `main' with a function in -lm:
AC_CHECK_LIB(m, main)

dnl See if "unsigned long long int" works
AC_CHECK_SIZEOF(unsigned long long int)

dnl Find a good type for other binary data types (in headers)
AC_CHECK_SIZEOF(unsigned long int)
AC_CHECK_SIZEOF(unsigned int)
AC_CHECK_SIZEOF(unsigned short)


dnl include additional checking if developing
AC_LBL_DEVEL(V_CCOPT)

dnl check for needed network libraries
AC_LBL_LIBRARY_NET()

dnl use fpurge if available, otherwise fflush
AC_CHECK_FUNCS(fpurge)

dnl use mkstemp if available, otherwise tempnam
AC_CHECK_FUNCS(mkstemp)

dnl use valloc if available, then memalign, then malloc
AC_CHECK_FUNCS(valloc memalign)

dnl check for the IPv6 routines inet_pton
AC_CHECK_FUNCS(inet_pton)

AC_MSG_CHECKING(how to print unsigned long long)
AC_SUBST(FS_ULL)
dnl AC_TRY_RUN is a test program that performs a run-time test to find out
dnl the correct syntax to print unsigned long long ints in printf stmts.
dnl If strcmp returns 0, we are on an enironment that uses %llu, otherwise
dnl we are on a MacOSX environment that uses %qu
AC_TRY_RUN([
#include <stdio.h>

#define NIX "%llu"

int main ()
{
  char test[11];
  unsigned long long int num = 0xdeadbeef;
  sprintf (test, NIX, num);
  if (strcmp (test, "3735928559") == 0)
     exit (0);
  else
     exit (1);
}],
AC_DEFINE(USE_LLU)
AC_MSG_RESULT(%llu), 
AC_MSG_RESULT(%qu),
AC_MSG_ERROR(can not run test program while cross compiling))

dnl Grab standard includes under weird Linux versions
dnl case "$target_os" in
dnl  *inux*)	V_INCLS="$V_INCLS -Ilinux-include";
dnl esac

dnl Grab includes from ./cygwin-includes under Windows versions
case "$target" in
  *cygwin*)	V_INCLS="$V_INCLS -I./cygwin-includes";
esac

dnl define -D__USE_BSD -D__FAVOR_BSD -D__USE_MISC -D__WIN32 for windows
case "$target" in
  *cygwin*)	V_DEFINES="$V_DEFINES -D__USE_BSD -D__FAVOR_BSD -D__USE_MISC -D__WIN32";
esac

dnl setting the correct PCAP_LDLIBS for windows
V_PCAP_LDLIBS="-lpcap";
case "$target" in
  *cygwin*)	V_PCAP_LDLIBS="-lwpcap";
esac

dnl define _BSD_SOURCE for libc-2
if [[ -f /lib/libc-2* ]]; then
 V_DEFINES="$V_DEFINES -D_BSD_SOURCE"
fi

AC_SUBST(V_CCOPT)
AC_SUBST(V_INCLS)
AC_SUBST(V_DEFINES)
AC_SUBST(V_PCAP_LDLIBS)

AC_OUTPUT(Makefile)