#***************************************************************************
#                                  _   _ ____  _
#  Project                     ___| | | |  _ \| |
#                             / __| | | | |_) | |
#                            | (__| |_| |  _ <| |___
#                             \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
#***************************************************************************

dnl File version for 'aclocal' use. Keep it a single number.
dnl serial 19

dnl CURL_CHECK_OPTION_THREADED_RESOLVER
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-threaded-resolver or --disable-threaded-resolver, and
dnl set shell variable want_threaded_resolver as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_THREADED_RESOLVER], [
  AC_MSG_CHECKING([whether to enable the threaded resolver])
  OPT_THRES="default"
  AC_ARG_ENABLE(threaded_resolver,
AS_HELP_STRING([--enable-threaded-resolver],[Enable threaded resolver])
AS_HELP_STRING([--disable-threaded-resolver],[Disable threaded resolver]),
  OPT_THRES=$enableval)
  case "$OPT_THRES" in
    no)
      dnl --disable-threaded-resolver option used
      want_threaded_resolver="no"
      ;;
    yes)
      dnl --enable-threaded-resolver option used
      want_threaded_resolver="yes"
      ;;
    *)
      dnl configure option not specified
      case $host_os in
        msdos* | amiga*)
          want_threaded_resolver="no"
          ;;
        *)
          if test "$want_ares" = "yes"; then
            want_threaded_resolver="no"
          else
            want_threaded_resolver="yes"
          fi
          ;;
      esac
      ;;
  esac
  AC_MSG_RESULT([$want_threaded_resolver])
])

dnl CURL_CHECK_OPTION_ARES
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-ares or --disable-ares, and
dnl set shell variable want_ares as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_ARES], [
  AC_BEFORE([$0],[CURL_CHECK_LIB_ARES])
  AC_MSG_CHECKING([whether to enable c-ares for DNS lookups])
  OPT_ARES="default"
  AC_ARG_ENABLE(ares,
AS_HELP_STRING([--enable-ares@<:@=PATH@:>@],[Enable c-ares for DNS lookups])
AS_HELP_STRING([--disable-ares],[Disable c-ares for DNS lookups]),
  OPT_ARES=$enableval)
  case "$OPT_ARES" in
    no)
      dnl --disable-ares option used
      want_ares="no"
      ;;
    default)
      dnl configure option not specified
      want_ares="no"
      ;;
    *)
      dnl --enable-ares option used
      want_ares="yes"
      if test -n "$enableval" && test "x$enableval" != "xyes"; then
        want_ares_path="$enableval"
      fi
      ;;
  esac
  AC_MSG_RESULT([$want_ares])
])


dnl CURL_CHECK_OPTION_DEBUG
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-debug or --disable-debug, and set shell
dnl variable want_debug value as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_DEBUG], [
  AC_BEFORE([$0],[CURL_CHECK_OPTION_WARNINGS])
  AC_BEFORE([$0],[XC_CHECK_PROG_CC])
  AC_MSG_CHECKING([whether to enable debug build options])
  OPT_DEBUG_BUILD="default"
  AC_ARG_ENABLE(debug,
AS_HELP_STRING([--enable-debug],[Enable debug build options])
AS_HELP_STRING([--disable-debug],[Disable debug build options]),
  OPT_DEBUG_BUILD=$enableval)
  case "$OPT_DEBUG_BUILD" in
    no)
      dnl --disable-debug option used
      want_debug="no"
      ;;
    default)
      dnl configure option not specified
      want_debug="no"
      ;;
    *)
      dnl --enable-debug option used
      want_debug="yes"
      ;;
  esac
  AC_MSG_RESULT([$want_debug])
])

dnl CURL_CHECK_OPTION_OPTIMIZE
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-optimize or --disable-optimize, and set
dnl shell variable want_optimize value as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_OPTIMIZE], [
  AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])
  AC_BEFORE([$0],[XC_CHECK_PROG_CC])
  AC_MSG_CHECKING([whether to enable compiler optimizer])
  OPT_COMPILER_OPTIMIZE="default"
  AC_ARG_ENABLE(optimize,
AS_HELP_STRING([--enable-optimize],[Enable compiler optimizations])
AS_HELP_STRING([--disable-optimize],[Disable compiler optimizations]),
  OPT_COMPILER_OPTIMIZE=$enableval)
  case "$OPT_COMPILER_OPTIMIZE" in
    no)
      dnl --disable-optimize option used. We handle this as a request
      dnl to disable compiler optimizations if possible. If the compiler
      dnl is known CFLAGS and CPPFLAGS are overridden, otherwise this
      dnl can not be honored.
      want_optimize="no"
      AC_MSG_RESULT([no])
      ;;
    default)
      dnl configure's optimize option not specified. Initially we handle
      dnl this as a request contrary to configure's setting for
      dnl --enable-debug. IOW, initially, for debug-enabled builds this
      dnl is handled as a request to disable optimizations if possible,
      dnl and for debug-disabled builds this is handled initially as
      dnl a request to enable optimizations if possible. Finally, if the
      dnl compiler is known and CFLAGS and CPPFLAGS do not have any
      dnl optimizer flag the request is honored, in any other case the
      dnl request can not be honored.
      dnl IOW, existing optimizer flags defined in CFLAGS or CPPFLAGS
      dnl always take precedence over any initial assumption.
      if test "$want_debug" = "yes"; then
        want_optimize="assume_no"
        AC_MSG_RESULT([(assumed) no])
      else
        want_optimize="assume_yes"
        AC_MSG_RESULT([(assumed) yes])
      fi
      ;;
    *)
      dnl --enable-optimize option used. We handle this as a request
      dnl to enable compiler optimizations if possible. If the compiler
      dnl is known CFLAGS and CPPFLAGS are overridden, otherwise this
      dnl can not be honored.
      want_optimize="yes"
      AC_MSG_RESULT([yes])
      ;;
  esac
])


dnl CURL_CHECK_OPTION_SYMBOL_HIDING
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-symbol-hiding or --disable-symbol-hiding,
dnl setting shell variable want_symbol_hiding value.

AC_DEFUN([CURL_CHECK_OPTION_SYMBOL_HIDING], [
  AC_BEFORE([$0],[CURL_CHECK_COMPILER_SYMBOL_HIDING])
  AC_MSG_CHECKING([whether to enable hiding of library internal symbols])
  OPT_SYMBOL_HIDING="default"
  AC_ARG_ENABLE(symbol-hiding,
AS_HELP_STRING([--enable-symbol-hiding],[Enable hiding of library internal symbols])
AS_HELP_STRING([--disable-symbol-hiding],[Disable hiding of library internal symbols]),
  OPT_SYMBOL_HIDING=$enableval)
  case "$OPT_SYMBOL_HIDING" in
    no)
      dnl --disable-symbol-hiding option used.
      dnl This is an indication to not attempt hiding of library internal
      dnl symbols. Default symbol visibility is used, which normally
      dnl exposes all library internal symbols.
      want_symbol_hiding="no"
      AC_MSG_RESULT([no])
      ;;
    default)
      dnl configure's symbol-hiding option not specified.
      dnl Handle this as if --enable-symbol-hiding option was given.
      want_symbol_hiding="yes"
      AC_MSG_RESULT([yes])
      ;;
    *)
      dnl --enable-symbol-hiding option used.
      dnl This is an indication to attempt hiding of library internal
      dnl symbols. This is only supported on some compilers/linkers.
      want_symbol_hiding="yes"
      AC_MSG_RESULT([yes])
      ;;
  esac
])


dnl CURL_CHECK_OPTION_RT
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --disable-rt and set shell variable dontwant_rt
dnl as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_RT], [
  AC_BEFORE([$0], [CURL_CHECK_LIB_THREADS])
  AC_MSG_CHECKING([whether to disable dependency on -lrt])
  OPT_RT="default"
  AC_ARG_ENABLE(rt,
AS_HELP_STRING([--disable-rt],[disable dependency on -lrt]),
  OPT_RT=$enableval)
  case "$OPT_RT" in
    no)
      dnl --disable-rt used (reverse logic)
      dontwant_rt="yes"
      AC_MSG_RESULT([yes])
      ;;
    default)
      dnl configure option not specified (so not disabled)
      dontwant_rt="no"
      AC_MSG_RESULT([(assumed no)])
      ;;
    *)
      dnl --enable-rt option used (reverse logic)
      dontwant_rt="no"
      AC_MSG_RESULT([no])
      ;;
  esac
])

dnl CURL_CHECK_OPTION_WARNINGS
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-warnings or --disable-warnings, and set
dnl shell variable want_warnings as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_WARNINGS], [
  AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])
  AC_BEFORE([$0],[CURL_CHECK_OPTION_WERROR])
  AC_BEFORE([$0],[XC_CHECK_PROG_CC])
  AC_MSG_CHECKING([whether to enable strict compiler warnings])
  OPT_COMPILER_WARNINGS="default"
  AC_ARG_ENABLE(warnings,
AS_HELP_STRING([--enable-warnings],[Enable strict compiler warnings])
AS_HELP_STRING([--disable-warnings],[Disable strict compiler warnings]),
  OPT_COMPILER_WARNINGS=$enableval)
  case "$OPT_COMPILER_WARNINGS" in
    no)
      dnl --disable-warnings option used
      want_warnings="no"
      ;;
    default)
      dnl configure option not specified, so
      dnl use same setting as --enable-debug
      want_warnings="$want_debug"
      ;;
    *)
      dnl --enable-warnings option used
      want_warnings="yes"
      ;;
  esac
  AC_MSG_RESULT([$want_warnings])
])

dnl CURL_CHECK_OPTION_WERROR
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-werror or --disable-werror, and set
dnl shell variable want_werror as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_WERROR], [
  AC_BEFORE([$0],[CURL_CHECK_COMPILER])
  AC_MSG_CHECKING([whether to enable compiler warnings as errors])
  OPT_COMPILER_WERROR="default"
  AC_ARG_ENABLE(werror,
AS_HELP_STRING([--enable-werror],[Enable compiler warnings as errors])
AS_HELP_STRING([--disable-werror],[Disable compiler warnings as errors]),
  OPT_COMPILER_WERROR=$enableval)
  case "$OPT_COMPILER_WERROR" in
    no)
      dnl --disable-werror option used
      want_werror="no"
      ;;
    default)
      dnl configure option not specified
      want_werror="no"
      ;;
    *)
      dnl --enable-werror option used
      want_werror="yes"
      ;;
  esac
  AC_MSG_RESULT([$want_werror])
])


dnl CURL_CHECK_NONBLOCKING_SOCKET
dnl -------------------------------------------------
dnl Check for how to set a socket into non-blocking state.

AC_DEFUN([CURL_CHECK_NONBLOCKING_SOCKET], [
  AC_REQUIRE([CURL_CHECK_FUNC_FCNTL])
  AC_REQUIRE([CURL_CHECK_FUNC_IOCTLSOCKET])
  AC_REQUIRE([CURL_CHECK_FUNC_IOCTLSOCKET_CAMEL])

  tst_method="unknown"

  AC_MSG_CHECKING([how to set a socket into non-blocking mode])
  if test "$curl_cv_func_fcntl_o_nonblock" = "yes"; then
    tst_method="fcntl O_NONBLOCK"
  elif test "$curl_cv_func_ioctl_fionbio" = "yes"; then
    tst_method="ioctl FIONBIO"
  elif test "$curl_cv_func_ioctlsocket_fionbio" = "yes"; then
    tst_method="ioctlsocket FIONBIO"
  elif test "$curl_cv_func_ioctlsocket_camel_fionbio" = "yes"; then
    tst_method="IoctlSocket FIONBIO"
  elif test "$curl_cv_func_setsockopt_so_nonblock" = "yes"; then
    tst_method="setsockopt SO_NONBLOCK"
  fi
  AC_MSG_RESULT([$tst_method])
  if test "$tst_method" = "unknown"; then
    AC_MSG_WARN([cannot determine non-blocking socket method.])
  fi
])


dnl CURL_CONFIGURE_SYMBOL_HIDING
dnl -------------------------------------------------
dnl Depending on --enable-symbol-hiding or --disable-symbol-hiding
dnl configure option, and compiler capability to actually honor such
dnl option, this modifies compiler flags as appropriate and also
dnl provides needed definitions for configuration and Makefile.am files.
dnl This macro should not be used until all compilation tests have
dnl been done to prevent interferences on other tests.

AC_DEFUN([CURL_CONFIGURE_SYMBOL_HIDING], [
  AC_MSG_CHECKING([whether hiding of library internal symbols does actually happen])
  CFLAG_CURL_SYMBOL_HIDING=""
  doing_symbol_hiding="no"
  if test "$want_symbol_hiding" = "yes" &&
    test "$supports_symbol_hiding" = "yes"; then
    doing_symbol_hiding="yes"
    CFLAG_CURL_SYMBOL_HIDING="$symbol_hiding_CFLAGS"
    AC_DEFINE_UNQUOTED(CURL_EXTERN_SYMBOL, $symbol_hiding_EXTERN,
      [Definition to make a library symbol externally visible.])
    AC_MSG_RESULT([yes])
  else
    AC_MSG_RESULT([no])
  fi
  AM_CONDITIONAL(DOING_CURL_SYMBOL_HIDING, test "$doing_symbol_hiding" = "yes")
  AC_SUBST(CFLAG_CURL_SYMBOL_HIDING)
])


dnl CURL_CHECK_LIB_ARES
dnl -------------------------------------------------
dnl When c-ares library support has been requested, performs necessary checks
dnl and adjustments needed to enable support of this library.

AC_DEFUN([CURL_CHECK_LIB_ARES], [

  if test "$want_ares" = "yes"; then
    dnl c-ares library support has been requested
    clean_CPPFLAGS="$CPPFLAGS"
    clean_LDFLAGS="$LDFLAGS"
    clean_LDFLAGSPC="$LDFLAGSPC"
    clean_LIBS="$LIBS"
    configure_runpath=`pwd`
    if test -n "$want_ares_path"; then
      dnl c-ares library path has been specified
      ARES_PCDIR="$want_ares_path/lib/pkgconfig"
      CURL_CHECK_PKGCONFIG(libcares, [$ARES_PCDIR])
      if test "$PKGCONFIG" != "no"; then
        ares_LIBS=`CURL_EXPORT_PCDIR([$ARES_PCDIR])
          $PKGCONFIG --libs-only-l libcares`
        ares_LDFLAGS=`CURL_EXPORT_PCDIR([$ARES_PCDIR])
          $PKGCONFIG --libs-only-L libcares`
        ares_CPPFLAGS=`CURL_EXPORT_PCDIR([$ARES_PCDIR])
          $PKGCONFIG --cflags-only-I libcares`
        AC_MSG_NOTICE([pkg-config: ares LIBS: "$ares_LIBS"])
        AC_MSG_NOTICE([pkg-config: ares LDFLAGS: "$ares_LDFLAGS"])
        AC_MSG_NOTICE([pkg-config: ares CPPFLAGS: "$ares_CPPFLAGS"])
      else
        dnl ... path without pkg-config
        ares_CPPFLAGS="-I$want_ares_path/include"
        ares_LDFLAGS="-L$want_ares_path/lib"
        ares_LIBS="-lcares"
      fi
    else
      dnl c-ares path not specified, use defaults
      CURL_CHECK_PKGCONFIG(libcares)
      if test "$PKGCONFIG" != "no"; then
        ares_LIBS=`$PKGCONFIG --libs-only-l libcares`
        ares_LDFLAGS=`$PKGCONFIG --libs-only-L libcares`
        ares_CPPFLAGS=`$PKGCONFIG --cflags-only-I libcares`
        AC_MSG_NOTICE([pkg-config: ares_LIBS: "$ares_LIBS"])
        AC_MSG_NOTICE([pkg-config: ares_LDFLAGS: "$ares_LDFLAGS"])
        AC_MSG_NOTICE([pkg-config: ares_CPPFLAGS: "$ares_CPPFLAGS"])
      else
        ares_CPPFLAGS=""
        ares_LDFLAGS=""
        ares_LIBS="-lcares"
      fi
    fi

    CPPFLAGS="$clean_CPPFLAGS $ares_CPPFLAGS"
    LDFLAGS="$clean_LDFLAGS $ares_LDFLAGS"
    LDFLAGSPC="$clean_LDFLAGSPC $ares_LDFLAGS"
    LIBS="$ares_LIBS $clean_LIBS"

    dnl check if c-ares new enough, 1.16.0 or newer
    AC_CHECK_FUNC([ares_getaddrinfo],
    [
    ],[
      AC_MSG_ERROR([c-ares library is defective or too old])
      dnl restore initial settings
      CPPFLAGS="$clean_CPPFLAGS"
      LDFLAGS="$clean_LDFLAGS"
      LDFLAGSPC="$clean_LDFLAGSPC"
      LIBS="$clean_LIBS"
      dnl prevent usage
      want_ares="no"
    ])

    if test "$want_ares" = "yes"; then
      dnl finally c-ares is used
      AC_DEFINE(USE_ARES, 1, [Define to enable c-ares support])
      USE_ARES=1
      LIBCURL_PC_REQUIRES_PRIVATE="$LIBCURL_PC_REQUIRES_PRIVATE libcares"
      curl_res_msg="c-ares"
    fi
  fi
])

dnl CURL_CHECK_OPTION_HTTPSRR
dnl -----------------------------------------------------
dnl Verify whether configure has been invoked with option
dnl --enable-httpsrr or --disable-httpsrr, and set
dnl shell variable want_httpsrr as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_HTTPSRR], [
  AC_MSG_CHECKING([whether to enable HTTPSRR support])
  OPT_HTTPSRR="default"
  AC_ARG_ENABLE(httpsrr,
AS_HELP_STRING([--enable-httpsrr],[Enable HTTPSRR support (experimental)])
AS_HELP_STRING([--disable-httpsrr],[Disable HTTPSRR support (experimental)]),
  OPT_HTTPSRR=$enableval)
  case "$OPT_HTTPSRR" in
    no)
      dnl --disable-httpsrr option used
      want_httpsrr="no"
      curl_httpsrr_msg="no      (--enable-httpsrr)"
      AC_MSG_RESULT([no])
      ;;
    default)
      dnl configure option not specified
      want_httpsrr="no"
      curl_httpsrr_msg="no      (--enable-httpsrr)"
      AC_MSG_RESULT([no])
      ;;
    *)
      dnl --enable-httpsrr option used
      want_httpsrr="yes"
      curl_httpsrr_msg="enabled"
      AC_MSG_RESULT([yes])
      ;;
  esac
])

dnl CURL_CHECK_OPTION_ECH
dnl -----------------------------------------------------
dnl Verify whether configure has been invoked with option
dnl --enable-ech or --disable-ech, and set
dnl shell variable want_ech as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_ECH], [
  AC_MSG_CHECKING([whether to enable ECH support])
  OPT_ECH="default"
  AC_ARG_ENABLE(ech,
AS_HELP_STRING([--enable-ech],[Enable ECH support (experimental)])
AS_HELP_STRING([--disable-ech],[Disable ECH support (experimental)]),
  OPT_ECH=$enableval)
  case "$OPT_ECH" in
    no)
      dnl --disable-ech option used
      want_ech="no"
      curl_ech_msg="no      (--enable-ech)"
      AC_MSG_RESULT([no])
      ;;
    default)
      dnl configure option not specified
      want_ech="no"
      curl_ech_msg="no      (--enable-ech)"
      AC_MSG_RESULT([no])
      ;;
    *)
      dnl --enable-ech option used
      want_ech="yes"
      curl_ech_msg="enabled (--disable-ech)"
      AC_MSG_RESULT([yes])
      ;;
  esac
])
])

dnl CURL_CHECK_OPTION_SSLS_EXPORT
dnl -----------------------------------------------------
dnl Verify whether configure has been invoked with option
dnl --enable-ssl-session-export or --disable-ssl-session-export, and set
dnl shell variable want_ech as appropriate.

AC_DEFUN([CURL_CHECK_OPTION_SSLS_EXPORT], [
  AC_MSG_CHECKING([whether to enable SSL session export support])
  OPT_SSLS_EXPORT="default"
  AC_ARG_ENABLE(ssls-export,
AS_HELP_STRING([--enable-ssls-export],
               [Enable SSL session export support (experimental)])
AS_HELP_STRING([--disable-ssls-export],
               [Disable SSL session export support (experimental)]),
  OPT_SSLS_EXPORT=$enableval)
  case "$OPT_SSLS_EXPORT" in
    no)
      dnl --disable-ssls-export option used
      want_ssls_export="no"
      curl_ssls_export_msg="no      (--enable-ssls-export)"
      AC_MSG_RESULT([no])
      ;;
    default)
      dnl configure option not specified
      want_ssls_export="no"
      curl_ssls_export_msg="no      (--enable-ssls-export)"
      AC_MSG_RESULT([no])
      ;;
    *)
      dnl --enable-ssls-export option used
      want_ssls_export="yes"
      curl_ssls_export_msg="enabled (--disable-ssls-export)"
      AC_MSG_RESULT([yes])
      ;;
  esac
])
])
