acinclude.m4

    AC_MSG_CHECKING([if gethostbyname_r takes 3 arguments])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
#undef _REENTRANT
#include <string.h>
#include <sys/types.h>
#include <netdb.h>
#undef NULL
#define NULL (void *)0
        int
        gethostbyname_r(const char *, struct hostent *,
                        struct hostent_data *);
      ]],[[
        struct hostent_data data;
        gethostbyname_r(NULL, NULL, NULL);
      ]])
    ],[
      AC_MSG_RESULT([yes])
      AC_DEFINE(HAVE_GETHOSTBYNAME_R_3, 1, [gethostbyname_r() takes 3 args])
      ac_cv_gethostbyname_r_args="3"
    ],[
      AC_MSG_RESULT([no])
    ])

    if test "$ac_cv_gethostbyname_r_args" = "unknown"; then
      AC_MSG_CHECKING([if gethostbyname_r with -D_REENTRANT takes 3 arguments])
      AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM([[
#undef _REENTRANT
#define _REENTRANT
#include <string.h>
#include <sys/types.h>
#include <netdb.h>
#undef NULL
#define NULL (void *)0
          int
          gethostbyname_r(const char *, struct hostent *,
                          struct hostent_data *);
        ]],[[
          struct hostent_data data;
          gethostbyname_r(NULL, NULL, NULL);
        ]])
      ],[
        AC_MSG_RESULT([yes])
        AC_DEFINE(HAVE_GETHOSTBYNAME_R_3, 1, [gethostbyname_r() takes 3 args])
        ac_cv_gethostbyname_r_args="3"
      ],[
        AC_MSG_RESULT([no])
      ])
    fi

    if test "$ac_cv_gethostbyname_r_args" = "unknown"; then
      AC_MSG_CHECKING([if gethostbyname_r takes 5 arguments])
      AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM([[
#undef _REENTRANT
#include <sys/types.h>
#include <netdb.h>
#undef NULL
#define NULL (void *)0
          struct hostent *
          gethostbyname_r(const char *, struct hostent *,
                          char *, int, int *);
        ]],[[
          gethostbyname_r(NULL, NULL, NULL, 0, NULL);
        ]])
      ],[
        AC_MSG_RESULT([yes])
        AC_DEFINE(HAVE_GETHOSTBYNAME_R_5, 1, [gethostbyname_r() takes 5 args])
        ac_cv_gethostbyname_r_args="5"
      ],[
        AC_MSG_RESULT([no])
      ])
    fi

    if test "$ac_cv_gethostbyname_r_args" = "unknown"; then
      AC_MSG_CHECKING([if gethostbyname_r with -D_REENTRANT takes 5 arguments])
      AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM([[
#undef _REENTRANT
#define _REENTRANT
#include <sys/types.h>
#include <netdb.h>
#undef NULL
#define NULL (void *)0
          struct hostent *
          gethostbyname_r(const char *, struct hostent *,
                          char *, int, int *);
        ]],[[
          gethostbyname_r(NULL, NULL, NULL, 0, NULL);
        ]])
      ],[
        AC_MSG_RESULT([yes])
        AC_DEFINE(HAVE_GETHOSTBYNAME_R_5, 1, [gethostbyname_r() takes 5 args])
        ac_cv_gethostbyname_r_args="5"
      ],[
        AC_MSG_RESULT([no])
      ])
    fi

    if test "$ac_cv_gethostbyname_r_args" = "unknown"; then
      AC_MSG_CHECKING([if gethostbyname_r takes 6 arguments])
      AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM([[
#undef _REENTRANT
#include <sys/types.h>
#include <netdb.h>
#undef NULL
#define NULL (void *)0
          int
          gethostbyname_r(const char *, struct hostent *,
                          char *, size_t, struct hostent **, int *);
        ]],[[
          gethostbyname_r(NULL, NULL, NULL, 0, NULL, NULL);
        ]])
      ],[
        AC_MSG_RESULT([yes])
        AC_DEFINE(HAVE_GETHOSTBYNAME_R_6, 1, [gethostbyname_r() takes 6 args])
        ac_cv_gethostbyname_r_args="6"
      ],[
        AC_MSG_RESULT([no])
      ])
    fi

    if test "$ac_cv_gethostbyname_r_args" = "unknown"; then
      AC_MSG_CHECKING([if gethostbyname_r with -D_REENTRANT takes 6 arguments])
      AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM([[
#undef _REENTRANT
#define _REENTRANT
#include <sys/types.h>
#include <netdb.h>
#undef NULL
#define NULL (void *)0
          int
          gethostbyname_r(const char *, struct hostent *,
                          char *, size_t, struct hostent **, int *);
        ]],[[
          gethostbyname_r(NULL, NULL, NULL, 0, NULL, NULL);
        ]])
      ],[
        AC_MSG_RESULT([yes])
        AC_DEFINE(HAVE_GETHOSTBYNAME_R_6, 1, [gethostbyname_r() takes 6 args])
        ac_cv_gethostbyname_r_args="6"
      ],[
        AC_MSG_RESULT([no])
      ])
    fi

    if test "$ac_cv_gethostbyname_r_args" = "unknown"; then
      AC_MSG_WARN([Cannot find out how to use gethostbyname_r])
      AC_MSG_WARN([HAVE_GETHOSTBYNAME_R will not be defined])
      ac_cv_func_gethostbyname_r="no"
    else
      AC_DEFINE_UNQUOTED(HAVE_GETHOSTBYNAME_R, 1,
        [Define to 1 if you have the gethostbyname_r function.])
      ac_cv_func_gethostbyname_r="yes"
    fi

  else
    ac_cv_func_gethostbyname_r="no"
  fi
])


dnl **********************************************************************
dnl CURL_DETECT_ICC ([ACTION-IF-YES])
dnl
dnl check if this is the Intel ICC compiler, and if so run the ACTION-IF-YES
dnl sets the $ICC variable to "yes" or "no"
dnl **********************************************************************
AC_DEFUN([CURL_DETECT_ICC],
[
    ICC="no"
    AC_MSG_CHECKING([for icc in use])
    if test "$GCC" = "yes"; then
       dnl check if this is icc acting as gcc in disguise
       AC_EGREP_CPP([^__INTEL_COMPILER], [__INTEL_COMPILER],
         dnl action if the text is found, this it has not been replaced by the
         dnl cpp
         ICC="no",
         dnl the text was not found, it was replaced by the cpp
         ICC="yes"
         AC_MSG_RESULT([yes])
         [$1]
       )
    fi
    if test "$ICC" = "no"; then
        # this is not ICC
        AC_MSG_RESULT([no])
    fi
])

dnl We create a function for detecting which compiler we use and then set as
dnl pendantic compiler options as possible for that particular compiler. The
dnl options are only used for debug-builds.

AC_DEFUN([CURL_CC_DEBUG_OPTS],
[
    if test "z$ICC" = "z"; then
      CURL_DETECT_ICC
    fi

    if test "$GCC" = "yes"; then

       dnl figure out gcc version!
       AC_MSG_CHECKING([gcc version])
       gccver=`$CC -dumpversion`
       num1=`echo $gccver | cut -d . -f1`
       num2=`echo $gccver | cut -d . -f2`
       gccnum=`(expr $num1 "*" 100 + $num2) 2>/dev/null`
       AC_MSG_RESULT($gccver)

       if test "$ICC" = "yes"; then
         dnl this is icc, not gcc.

         dnl ICC warnings we ignore:
         dnl * 269 warns on our "%Od" printf formatters for curl_off_t output:
         dnl   "invalid format string conversion"
         dnl * 279 warns on static conditions in while expressions
         dnl * 981 warns on "operands are evaluated in unspecified order"
         dnl * 1418 "external definition with no prior declaration"
         dnl * 1419 warns on "external declaration in primary source file"
         dnl   which we know and do on purpose.

         WARN="-wd279,269,981,1418,1419"

         if test "$gccnum" -gt "600"; then
            dnl icc 6.0 and older doesn't have the -Wall flag
            WARN="-Wall $WARN"
         fi
       else dnl $ICC = yes
         dnl this is a set of options we believe *ALL* gcc versions support:
         WARN="-W -Wall -Wwrite-strings -pedantic -Wpointer-arith -Wnested-externs -Winline -Wmissing-prototypes"

         dnl -Wcast-align is a bit too annoying on all gcc versions ;-)

         if test "$gccnum" -ge "207"; then
           dnl gcc 2.7 or later
           WARN="$WARN -Wmissing-declarations"
         fi

         if test "$gccnum" -gt "295"; then
           dnl only if the compiler is newer than 2.95 since we got lots of
           dnl "`_POSIX_C_SOURCE' is not defined" in system headers with
           dnl gcc 2.95.4 on FreeBSD 4.9!
           WARN="$WARN -Wundef -Wno-long-long -Wsign-compare -Wshadow -Wno-multichar"
         fi

         if test "$gccnum" -ge "296"; then
           dnl gcc 2.96 or later
           WARN="$WARN -Wfloat-equal"
         fi

         if test "$gccnum" -gt "296"; then
           dnl this option does not exist in 2.96
           WARN="$WARN -Wno-format-nonliteral"
         fi

         dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
         dnl on i686-Linux as it gives us heaps with false positives.
         dnl Also, on gcc 4.0.X it is totally unbearable and complains all
         dnl over making it unusable for generic purposes. Let's not use it.

         if test "$gccnum" -ge "303"; then
           dnl gcc 3.3 and later
           WARN="$WARN -Wendif-labels -Wstrict-prototypes"
         fi

         if test "$gccnum" -ge "304"; then
           # try these on gcc 3.4
           WARN="$WARN -Wdeclaration-after-statement"
         fi

         for flag in $CPPFLAGS; do
           case "$flag" in
            -I*)
              dnl Include path, provide a -isystem option for the same dir
              dnl to prevent warnings in those dirs. The -isystem was not very
              dnl reliable on earlier gcc versions.
              add=`echo $flag | sed 's/^-I/-isystem /g'`
              WARN="$WARN $add"
              ;;
           esac
         done

       fi dnl $ICC = no

       CFLAGS="$CFLAGS $WARN"

      AC_MSG_NOTICE([Added this set of compiler options: $WARN])

    else dnl $GCC = yes

      AC_MSG_NOTICE([Added no extra compiler options])

    fi dnl $GCC = yes

    dnl strip off optimizer flags
    NEWFLAGS=""
    for flag in $CFLAGS; do
      case "$flag" in
      -O*)
        dnl echo "cut off $flag"
        ;;
      *)
        NEWFLAGS="$NEWFLAGS $flag"
        ;;
      esac
    done
    CFLAGS=$NEWFLAGS

]) dnl end of AC_DEFUN()

# This is only a temporary fix. This macro is here to replace the broken one
# delivered by the automake project (including the 1.9.6 release). As soon as
# they ship a working version we SHOULD remove this work-around.

AC_DEFUN([AM_MISSING_HAS_RUN],
[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
test x"${MISSING+set}" = xset || MISSING="\${SHELL} \"$am_aux_dir/missing\""
# Use eval to expand $SHELL
if eval "$MISSING --run true"; then
  am_missing_run="$MISSING --run "
else
  am_missing_run=
  AC_MSG_WARN([`missing' script is too old or missing])
fi
])


dnl CURL_VERIFY_RUNTIMELIBS
dnl -------------------------------------------------
dnl Verify that the shared libs found so far can be used when running
dnl programs, since otherwise the situation will create odd configure errors
dnl that are misleading people.
dnl
dnl Make sure this test is run BEFORE the first test in the script that
dnl runs anything, which at the time of this writing is the AC_CHECK_SIZEOF
dnl macro. It must also run AFTER all lib-checking macros are complete.

AC_DEFUN([CURL_VERIFY_RUNTIMELIBS], [

  dnl this test is of course not sensible if we are cross-compiling!
  if test "x$cross_compiling" != xyes; then

    dnl just run a program to verify that the libs checked for previous to this
    dnl point also is available run-time!
    AC_MSG_CHECKING([run-time libs availability])
    AC_TRY_RUN([
main()
{
  return 0;
}
],
    AC_MSG_RESULT([fine]),
    AC_MSG_RESULT([failed])
    AC_MSG_ERROR([one or more libs available at link-time are not available run-time. Libs used at link-time: $LIBS])
    )

    dnl if this test fails, configure has already stopped
  fi
])


dnl CURL_CHECK_VARIADIC_MACROS
dnl -------------------------------------------------
dnl Check compiler support of variadic macros

AC_DEFUN([CURL_CHECK_VARIADIC_MACROS], [
  AC_CACHE_CHECK([for compiler support of C99 variadic macro style],
    [curl_cv_variadic_macros_c99], [
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
#define c99_vmacro3(first, ...) fun3(first, __VA_ARGS__)
#define c99_vmacro2(first, ...) fun2(first, __VA_ARGS__)
        int fun3(int arg1, int arg2, int arg3);
        int fun2(int arg1, int arg2);
        int fun3(int arg1, int arg2, int arg3)
        { return arg1 + arg2 + arg3; }
        int fun2(int arg1, int arg2)
        { return arg1 + arg2; }
      ]],[[
        int res3 = c99_vmacro3(1, 2, 3);
        int res2 = c99_vmacro2(1, 2);
      ]])
    ],[
      curl_cv_variadic_macros_c99="yes"
    ],[
      curl_cv_variadic_macros_c99="no"
    ])
  ])
  case "$curl_cv_variadic_macros_c99" in
    yes)
      AC_DEFINE_UNQUOTED(HAVE_VARIADIC_MACROS_C99, 1,
        [Define to 1 if compiler supports C99 variadic macro style.])
      ;;
  esac
  AC_CACHE_CHECK([for compiler support of old gcc variadic macro style],
    [curl_cv_variadic_macros_gcc], [
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
#define gcc_vmacro3(first, args...) fun3(first, args)
#define gcc_vmacro2(first, args...) fun2(first, args)
        int fun3(int arg1, int arg2, int arg3);
        int fun2(int arg1, int arg2);
        int fun3(int arg1, int arg2, int arg3)
        { return arg1 + arg2 + arg3; }
        int fun2(int arg1, int arg2)
        { return arg1 + arg2; }
      ]],[[
        int res3 = gcc_vmacro3(1, 2, 3);
        int res2 = gcc_vmacro2(1, 2);
      ]])
    ],[
      curl_cv_variadic_macros_gcc="yes"
    ],[
      curl_cv_variadic_macros_gcc="no"
    ])
  ])
  case "$curl_cv_variadic_macros_gcc" in
    yes)
      AC_DEFINE_UNQUOTED(HAVE_VARIADIC_MACROS_GCC, 1,
        [Define to 1 if compiler supports old gcc variadic macro style.])
      ;;
  esac
])


dnl CURL_CHECK_CA_BUNDLE
dnl -------------------------------------------------
dnl Check if a default ca-bundle should be used
dnl
dnl regarding the paths this will scan:
dnl /etc/ssl/certs/ca-certificates.crt Debian systems
dnl /etc/pki/tls/certs/ca-bundle.crt Redhat and Mandriva
dnl /usr/share/ssl/certs/ca-bundle.crt old(er) Redhat
dnl /etc/ssl/certs/ (ca path) SUSE

AC_DEFUN([CURL_CHECK_CA_BUNDLE], [

  AC_MSG_CHECKING([default CA cert bundle/path])

  AC_ARG_WITH(ca-bundle,
AC_HELP_STRING([--with-ca-bundle=FILE], [File name to use as CA bundle])
AC_HELP_STRING([--without-ca-bundle], [Don't use a default CA bundle]),
  [
    want_ca="$withval"
    if test "x$want_ca" = "xyes"; then
      AC_MSG_ERROR([--with-ca-bundle=FILE requires a path to the CA bundle])
    fi
  ],
  [ want_ca="unset" ])
  AC_ARG_WITH(ca-path,
AC_HELP_STRING([--with-ca-path=DIRECTORY], [Directory to use as CA path])
AC_HELP_STRING([--without-ca-path], [Don't use a default CA path]),
  [
    want_capath="$withval"
    if test "x$want_capath" = "xyes"; then
      AC_MSG_ERROR([--with-ca-path=DIRECTORY requires a path to the CA path directory])
    fi
  ],
  [ want_capath="unset"])

  if test "x$want_ca" != "xno" -a "x$want_ca" != "xunset" -a \
          "x$want_capath" != "xno" -a "x$want_capath" != "xunset"; then
    dnl both given
    AC_MSG_ERROR([Can't specify both --with-ca-bundle and --with-ca-path.])
  elif test "x$want_ca" != "xno" -a "x$want_ca" != "xunset"; then
    dnl --with-ca-bundle given
    ca="$want_ca"
    capath="no"
  elif test "x$want_capath" != "xno" -a "x$want_capath" != "xunset"; then
    dnl --with-ca-path given
    if test "x$OPENSSL_ENABLED" != "x1"; then
      AC_MSG_ERROR([--with-ca-path only works with openSSL])
    fi
    capath="$want_capath"
    ca="no"
  else
    dnl neither of --with-ca-* given
    dnl first try autodetecting a CA bundle , then a CA path
    dnl both autodetections can be skipped by --without-ca-*
    ca="no"
    capath="no"
    if test "x$want_ca" = "xunset"; then
      dnl the path we previously would have installed the curl ca bundle
      dnl to, and thus we now check for an already existing cert in that place
      dnl in case we find no other
      if test "x$prefix" != xNONE; then
        cac="${prefix}/share/curl/curl-ca-bundle.crt"
      else
        cac="$ac_default_prefix/share/curl/curl-ca-bundle.crt"
      fi

      for a in /etc/ssl/certs/ca-certificates.crt \
               /etc/pki/tls/certs/ca-bundle.crt \
               /usr/share/ssl/certs/ca-bundle.crt \
               "$cac"; do
        if test -f "$a"; then
          ca="$a"
          break
        fi
      done
    fi
    if test "x$want_capath" = "xunset" -a "x$ca" = "xno" -a \
            "x$OPENSSL_ENABLED" = "x1"; then
      for a in /etc/ssl/certs/; do
        if test -d "$a" && ls "$a"/[[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]].0 >/dev/null 2>/dev/null; then
          capath="$a"
          break
        fi
      done
    fi
  fi
        
    

  if test "x$ca" != "xno"; then
    CURL_CA_BUNDLE='"'$ca'"'
    AC_DEFINE_UNQUOTED(CURL_CA_BUNDLE, "$ca", [Location of default ca bundle])
    AC_SUBST(CURL_CA_BUNDLE)
    AC_MSG_RESULT([$ca])
  elif test "x$capath" != "xno"; then
    CURL_CA_PATH="\"$capath\""
    AC_DEFINE_UNQUOTED(CURL_CA_PATH, "$capath", [Location of default ca path])
    AC_MSG_RESULT([$capath (capath)])
  else
    AC_MSG_RESULT([no])
  fi
])