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dfe06e6202
Unfortunately the data reported by pkg-config is not completely accurate, so until the issue has been fixed in readline we need to work around it in libvirt. The good news is that we only need the fix to land in FreeBSD ports and macOS homebrew before we can drop the kludge, so we're talking months rather than years. Signed-off-by: Andrea Bolognani <abologna@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
87 lines
3.4 KiB
Plaintext
87 lines
3.4 KiB
Plaintext
dnl The readline library
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dnl
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dnl Copyright (C) 2005-2013 Red Hat, Inc.
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dnl
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dnl This library is free software; you can redistribute it and/or
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dnl modify it under the terms of the GNU Lesser General Public
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dnl License as published by the Free Software Foundation; either
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dnl version 2.1 of the License, or (at your option) any later version.
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dnl
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dnl This library is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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dnl Lesser General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU Lesser General Public
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dnl License along with this library. If not, see
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dnl <http://www.gnu.org/licenses/>.
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dnl
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AC_DEFUN([LIBVIRT_ARG_READLINE],[
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LIBVIRT_ARG_WITH_FEATURE([READLINE], [readline], [check])
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])
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AC_DEFUN([LIBVIRT_CHECK_READLINE],[
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# We have to check for readline.pc's presence beforehand because for
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# the longest time the library didn't ship a .pc file at all
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PKG_CHECK_EXISTS([readline], [use_pkgconfig=1], [use_pkgconfig=0])
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if test $use_pkgconfig = 1; then
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# readline 7.0 is the first version which includes pkg-config support
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LIBVIRT_CHECK_PKG([READLINE], [readline], [7.0])
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else
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# This function is present in all reasonable (5.0+) readline versions;
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# however, the macOS base system contains a library called libedit which
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# takes over the readline name despite lacking many of its features. We
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# want to make sure we only enable readline support when linking against
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# the actual readline library, and the availability of this specific
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# functions is as good a witness for that fact as any.
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AC_CHECK_DECLS([rl_completion_quote_character],
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[], [],
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[[#include <stdio.h>
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#include <readline/readline.h>]])
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if test "$ac_cv_have_decl_rl_completion_quote_character" = "no" ; then
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if test "$with_readline" = "yes" ; then
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AC_MSG_ERROR([readline is missing rl_completion_quote_character])
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else
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with_readline=no;
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fi
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fi
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# The normal library check...
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LIBVIRT_CHECK_LIB([READLINE], [readline], [readline], [readline/readline.h])
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fi
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# We need this to avoid compilation issues with modern compilers.
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# See 9ea3424a178 for a more detailed explanation
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if test "$with_readline" = "yes" ; then
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case "$READLINE_CFLAGS" in
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*-D_FUNCTION_DEF*) ;;
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*) READLINE_CFLAGS="-D_FUNCTION_DEF $READLINE_CFLAGS" ;;
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esac
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fi
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# Gross kludge for readline include path obtained through pkg-config.
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#
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# As of 8.0, upstream readline.pc has -I${includedir}/readline among
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# its Cflags, which is clearly wrong. This does not affect Linux
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# because ${includedir} is already part of the default include path,
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# but on other platforms that's not the case and the result is that
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# <readline/readline.h> can't be located, causing the build to fail.
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# A patch solving this issue has already been posted upstream, so once
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# the fix has landed in FreeBSD ports and macOS homebrew we can safely
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# drop the kludge and rely on pkg-config alone on those platforms.
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#
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# [1] http://lists.gnu.org/archive/html/bug-readline/2019-04/msg00007.html
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case "$READLINE_CFLAGS" in
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*include/readline*) READLINE_CFLAGS=$(echo $READLINE_CFLAGS | sed s,include/readline,include,g) ;;
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*) ;;
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esac
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])
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AC_DEFUN([LIBVIRT_RESULT_READLINE],[
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LIBVIRT_RESULT_LIB([READLINE])
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])
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