configure.in

《CODE READING》配套书源代码 《CODE READING》配套书源代码

dnl Use autoconf on this directory to produce configure script
dnl Use autoheader on this file to produce config.h.in
dnl Then use configure script to generate makefile from Makefile.in

AC_INIT(sockstream.h)            dnl a distinct socket++ file
AC_CONFIG_HEADER(config.h)

dnl check for programs
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CXX

if test $ac_cv_prog_gxx = yes; then
  dnl check if g++ version is greater than or equal to 2.7.2
  AC_MSG_CHECKING(whether g++ version is >= 2.7.2)
  AC_CACHE_VAL(socketxx_cv_gxx_ver, [
  socketxx_gxx_version=`eval "$CXX --version"`
  oldifs=$IFS
  IFS='.-qab'
  set $socketxx_gxx_version
  IFS=$oldifs
  socketxx_cv_gxx_ver=`eval "expr $1 \* 10000 + $2 \* 100 + $3"`])

  if test $socketxx_cv_gxx_ver -ge 20702; then
    AC_MSG_RESULT(yes)
  else
    AC_MSG_RESULT(no)
    AC_MSG_ERROR(g++ version $socketxx_gxx_version < 2.7.2)
  fi

  dnl add exception handling flag to g++ compiler
  dnl exception handling does not work with -O
  CXXFLAGS="-g -fhandle-exceptions"

  dnl add runtime type identification flag to g++
  dnl CXXFLAGS="$CXXFLAGS -frtti"
  dnl libg++ is compiled without rtti thus we should not use rtti
  CXXFLAGS="$CXXFLAGS -fno-rtti"
fi

AC_PROG_RANLIB
AC_CHECK_PROG(MAKEDEPEND, makedepend, makedepend, :) dnl not a smiley :(
AC_PROG_CPP                      dnl later macros will use it
AC_PROG_CXXCPP                   dnl later macros will use it
AC_AIX

dnl check for libraries
AC_CHECK_LIB(nsl, t_accept, NETWORK_LIBS="$NETWORK_LIBS -lnsl")
AC_CHECK_LIB(socket, socket, NETWORK_LIBS="$NETWORK_LIBS -lsocket")
AC_SUBST(NETWORK_LIBS)

dnl check for header files
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_CHECK_HEADERS(string.h memory.h)
AC_CHECK_HEADER(_G_config.h, AC_DEFINE(_S_LIBGXX))
AC_LANG_RESTORE
AC_HEADER_SYS_WAIT

dnl check for typedefs
AC_PID_T

dnl check for structures

dnl check for compiler characteristics
AC_SUBST(CXX_INCLUDE_PATH)
AC_SUBST(CFLAGS)
AC_SUBST(CXXFLAGS)
AC_SUBST(LDFLAGS)

dnl check for library functions and global variables
AC_RETSIGTYPE
AC_FUNC_VFORK
AC_HAVE_FUNCS(select)

AC_MSG_CHECKING(for sys_siglist)
AC_CACHE_VAL(socketxx_cv_siglist, [
AC_TRY_LINK([
# include <unistd.h>
# include <sys/signal.h>
], [
#ifndef _sys_siglist
  extern char* _sys_siglist[];
#endif
  puts(*_sys_siglist);
],
socketxx_cv_siglist=_sys_siglist,
socketxx_cv_siglist=sys_siglist) ])
AC_DEFINE_UNQUOTED(SYS_SIGLIST, $socketxx_cv_siglist)
AC_MSG_RESULT($socketxx_cv_siglist)

AC_MSG_CHECKING(for sys_errlist)
AC_CACHE_VAL(socketxx_cv_errlist, [
AC_TRY_LINK([
# include <errno.h>
# include <unistd.h>
], [
#ifndef _sys_errlist
  extern char* _sys_errlist[];
#endif
  puts(*_sys_errlist);
],
socketxx_cv_errlist=_sys_errlist,
socketxx_cv_errlist=sys_errlist) ])
AC_DEFINE_UNQUOTED(SYS_ERRLIST, $socketxx_cv_errlist)
AC_MSG_RESULT($socketxx_cv_errlist)

AC_MSG_CHECKING(for sys_errlist prototype)
AC_CACHE_VAL(socketxx_cv_errlist_proto, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE( [
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
], [
  puts (*$socketxx_cv_errlist);
],
socketxx_cv_errlist_proto=yes,
socketxx_cv_errlist_proto=no) ])
AC_LANG_RESTORE
if test $socketxx_cv_errlist_proto = yes; then
  AC_DEFINE(SYS_ERRLIST_DECLARED)
fi
AC_MSG_RESULT($socketxx_cv_errlist_proto)

AC_MSG_CHECKING(for signal handler arg type)
AC_CACHE_VAL(socketxx_cv_sighnd_argtype, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([
# include <unistd.h>
# include <sys/signal.h>

  void sigh (int s, int c, void* p, void* a) {}
  ], [
  typedef RETSIGTYPE (*funcptr) (...);
  struct sigaction sa;
  sa.sa_handler = funcptr (&sigh);
  ],
  socketxx_cv_sighnd_argtype=...,
  AC_TRY_COMPILE([
#   include <unistd.h>
#   include <sys/signal.h>

    void sigh (int s, int c, void* p, void* a);
    ], [
    typedef RETSIGTYPE (*funcptr) (int);
    struct sigaction sa;
    sa.sa_handler = funcptr (&sigh);
    ],
    socketxx_cv_sighnd_argtype=int,
    socketxx_cv_sighnd_argtype=void)) ])
AC_LANG_RESTORE
AC_DEFINE_UNQUOTED(SIGHND_ARGTYPE, $socketxx_cv_sighnd_argtype)
AC_MSG_RESULT($socketxx_cv_sighnd_argtype)

dnl the following check was provided by
dnl Blair Zajac <[e-mail]>
AC_MSG_CHECKING(if extern \"C\" wrappers are needed)
AC_CACHE_VAL(bz_cv_cplusplus_needexternCwrapper, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_LINK([
# include <string.h>
# include <stdio.h>
], [
  char buf[100];
  strcpy(buf, "Hello world\n");
],
  bz_cv_cplusplus_needexternCwrapper=no,
  bz_cv_cplusplus_needexternCwrapper=yes)
])
AC_LANG_RESTORE

if test $bz_cv_cplusplus_needexternCwrapper = no; then
  AC_DEFINE(EXTERN_C_BEGIN,)
  AC_DEFINE(EXTERN_C_END,)
else
  AC_DEFINE(EXTERN_C_BEGIN, extern "C" {)
  AC_DEFINE(EXTERN_C_END, })
fi
AC_MSG_RESULT($bz_cv_cplusplus_needexternCwrapper)

dnl check for system

dnl generate output files
AC_OUTPUT(Makefile test/Makefile)