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configure: remove support for "embedded ares"

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In March 2010 (commit 4259d2df7d) we removed the embedded 'ares'
directory from the curl source tree but we have since supported
especially detecting and using that build directory. The time has come
to remove that kludge and ask users to specify the c-ares dir correctly
with --enable-ares.

Closes #8397
This commit is contained in:
Daniel Stenberg 2022-02-07 17:17:31 +01:00
parent 436398bef5
commit ff4bf6bfb5
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GPG key ID: 5CC908FDB71E12C2
6 changed files with 45 additions and 100 deletions
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101
m4/curl-confopts.m4
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@ -5,7 +5,7 @@
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
# Copyright (C) 1998 - 2022, 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
@ -487,9 +487,7 @@ AC_DEFUN([CURL_CHECK_LIB_ARES], [
clean_CPPFLAGS="$CPPFLAGS"
clean_LDFLAGS="$LDFLAGS"
clean_LIBS="$LIBS"
embedded_ares="unknown"
configure_runpath=`pwd`
embedded_ares_builddir="$configure_runpath/ares"
if test -n "$want_ares_path"; then
dnl c-ares library path has been specified
ARES_PCDIR="$want_ares_path/lib/pkgconfig"
@ -511,31 +509,19 @@ AC_DEFUN([CURL_CHECK_LIB_ARES], [
ares_LIBS="-lcares"
fi
else
dnl c-ares library path has not been given
if test -d "$srcdir/ares"; then
dnl c-ares sources embedded in curl tree
embedded_ares="yes"
AC_CONFIG_SUBDIRS(ares)
dnl c-ares has installable configured header files, path
dnl inclusion fully done in makefiles for in-tree builds.
ares_CPPFLAGS=""
ares_LDFLAGS="-L$embedded_ares_builddir"
ares_LIBS="-lcares"
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: "$ares_CPPFLAGS"])
else
dnl c-ares path not specified, use defaults
CURL_CHECK_PKGCONFIG(libcares)
if test "$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
ares_CPPFLAGS=""
ares_LDFLAGS=""
ares_LIBS="-lcares"
fi
fi
#
@ -543,38 +529,37 @@ AC_DEFUN([CURL_CHECK_LIB_ARES], [
LDFLAGS="$clean_LDFLAGS $ares_LDFLAGS"
LIBS="$ares_LIBS $clean_LIBS"
#
if test "$embedded_ares" != "yes"; then
dnl check if c-ares new enough when not using an embedded
dnl source tree one which normally has not been built yet.
AC_MSG_CHECKING([that c-ares is good and recent enough])
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
dnl check if c-ares new enough
AC_MSG_CHECKING([that c-ares is good and recent enough])
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
#include <ares.h>
/* set of dummy functions in case c-ares was built with debug */
void curl_dofree() { }
void curl_sclose() { }
void curl_domalloc() { }
void curl_docalloc() { }
void curl_socket() { }
]],[[
ares_channel channel;
ares_cancel(channel); /* added in 1.2.0 */
ares_process_fd(channel, 0, 0); /* added in 1.4.0 */
ares_dup(&channel, channel); /* added in 1.6.0 */
]])
],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([c-ares library defective or too old])
dnl restore initial settings
CPPFLAGS="$clean_CPPFLAGS"
LDFLAGS="$clean_LDFLAGS"
LIBS="$clean_LIBS"
# prevent usage
want_ares="no"
])
fi
/* set of dummy functions in case c-ares was built with debug */
void curl_dofree() { }
void curl_sclose() { }
void curl_domalloc() { }
void curl_docalloc() { }
void curl_socket() { }
]],[[
ares_channel channel;
ares_cancel(channel); /* added in 1.2.0 */
ares_process_fd(channel, 0, 0); /* added in 1.4.0 */
ares_dup(&channel, channel); /* added in 1.6.0 */
]])
],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([c-ares library defective or too old])
dnl restore initial settings
CPPFLAGS="$clean_CPPFLAGS"
LDFLAGS="$clean_LDFLAGS"
LIBS="$clean_LIBS"
# prevent usage
want_ares="no"
])
if test "$want_ares" = "yes"; then
dnl finally c-ares will be used
AC_DEFINE(USE_ARES, 1, [Define to enable c-ares support])