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aclocal.m4
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dnl $Id: aclocal.m4,v 1.46 2023/12/29 10:38:47 tom Exp $
dnl autoconf macros for vttest - T.E.Dickey
dnl ---------------------------------------------------------------------------
dnl Copyright: 1997-2022,2023 by Thomas E. Dickey
dnl
dnl Permission is hereby granted, free of charge, to any person obtaining a
dnl copy of this software and associated documentation files (the
dnl "Software"), to deal in the Software without restriction, including
dnl without limitation the rights to use, copy, modify, merge, publish,
dnl distribute, distribute with modifications, sublicense, and/or sell
dnl copies of the Software, and to permit persons to whom the Software is
dnl furnished to do so, subject to the following conditions:
dnl
dnl The above copyright notice and this permission notice shall be included
dnl in all copies or portions of the Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
dnl OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
dnl MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
dnl IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
dnl DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
dnl OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
dnl THE USE OR OTHER DEALINGS IN THE SOFTWARE.
dnl
dnl Except as contained in this notice, the name(s) of the above copyright
dnl holders shall not be used in advertising or otherwise to promote the
dnl sale, use or other dealings in this Software without prior written
dnl authorization.
dnl ---------------------------------------------------------------------------
dnl ---------------------------------------------------------------------------
dnl AM_LANGINFO_CODESET version: 7 updated: 2023/01/11 04:05:23
dnl -------------------
dnl Inserted as requested by gettext 0.10.40
dnl File from /usr/share/aclocal
dnl codeset.m4
dnl ====================
dnl serial AM1
dnl
dnl From Bruno Haible.
AC_DEFUN([AM_LANGINFO_CODESET],
[
AC_CACHE_CHECK([for nl_langinfo and CODESET], am_cv_langinfo_codeset,
[AC_TRY_LINK([
$ac_includes_default
#include <langinfo.h>],
[char* cs = nl_langinfo(CODESET); (void)cs],
am_cv_langinfo_codeset=yes,
am_cv_langinfo_codeset=no)
])
if test "$am_cv_langinfo_codeset" = yes; then
AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
[Define if you have <langinfo.h> and nl_langinfo(CODESET).])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ACVERSION_CHECK version: 5 updated: 2014/06/04 19:11:49
dnl ------------------
dnl Conditionally generate script according to whether we're using a given autoconf.
dnl
dnl $1 = version to compare against
dnl $2 = code to use if AC_ACVERSION is at least as high as $1.
dnl $3 = code to use if AC_ACVERSION is older than $1.
define([CF_ACVERSION_CHECK],
[
ifdef([AC_ACVERSION], ,[ifdef([AC_AUTOCONF_VERSION],[m4_copy([AC_AUTOCONF_VERSION],[AC_ACVERSION])],[m4_copy([m4_PACKAGE_VERSION],[AC_ACVERSION])])])dnl
ifdef([m4_version_compare],
[m4_if(m4_version_compare(m4_defn([AC_ACVERSION]), [$1]), -1, [$3], [$2])],
[CF_ACVERSION_COMPARE(
AC_PREREQ_CANON(AC_PREREQ_SPLIT([$1])),
AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)), AC_ACVERSION, [$2], [$3])])])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ACVERSION_COMPARE version: 3 updated: 2012/10/03 18:39:53
dnl --------------------
dnl CF_ACVERSION_COMPARE(MAJOR1, MINOR1, TERNARY1,
dnl MAJOR2, MINOR2, TERNARY2,
dnl PRINTABLE2, not FOUND, FOUND)
define([CF_ACVERSION_COMPARE],
[ifelse(builtin([eval], [$2 < $5]), 1,
[ifelse([$8], , ,[$8])],
[ifelse([$9], , ,[$9])])])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ADD_CFLAGS version: 15 updated: 2020/12/31 10:54:15
dnl -------------
dnl Copy non-preprocessor flags to $CFLAGS, preprocessor flags to $CPPFLAGS
dnl $1 = flags to add
dnl $2 = if given makes this macro verbose.
dnl
dnl Put any preprocessor definitions that use quoted strings in $EXTRA_CPPFLAGS,
dnl to simplify use of $CPPFLAGS in compiler checks, etc., that are easily
dnl confused by the quotes (which require backslashes to keep them usable).
AC_DEFUN([CF_ADD_CFLAGS],
[
cf_fix_cppflags=no
cf_new_cflags=
cf_new_cppflags=
cf_new_extra_cppflags=
for cf_add_cflags in $1
do
case "$cf_fix_cppflags" in
(no)
case "$cf_add_cflags" in
(-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C)
case "$cf_add_cflags" in
(-D*)
cf_tst_cflags=`echo "${cf_add_cflags}" |sed -e 's/^-D[[^=]]*='\''\"[[^"]]*//'`
test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
&& test -z "${cf_tst_cflags}" \
&& cf_fix_cppflags=yes
if test "$cf_fix_cppflags" = yes ; then
CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
continue
elif test "${cf_tst_cflags}" = "\"'" ; then
CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
continue
fi
;;
esac
case "$CPPFLAGS" in
(*$cf_add_cflags)
;;
(*)
case "$cf_add_cflags" in
(-D*)
cf_tst_cppflags=`echo "x$cf_add_cflags" | sed -e 's/^...//' -e 's/=.*//'`
CF_REMOVE_DEFINE(CPPFLAGS,$CPPFLAGS,$cf_tst_cppflags)
;;
esac
CF_APPEND_TEXT(cf_new_cppflags,$cf_add_cflags)
;;
esac
;;
(*)
CF_APPEND_TEXT(cf_new_cflags,$cf_add_cflags)
;;
esac
;;
(yes)
CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
cf_tst_cflags=`echo "${cf_add_cflags}" |sed -e 's/^[[^"]]*"'\''//'`
test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
&& test -z "${cf_tst_cflags}" \
&& cf_fix_cppflags=no
;;
esac
done
if test -n "$cf_new_cflags" ; then
ifelse([$2],,,[CF_VERBOSE(add to \$CFLAGS $cf_new_cflags)])
CF_APPEND_TEXT(CFLAGS,$cf_new_cflags)
fi
if test -n "$cf_new_cppflags" ; then
ifelse([$2],,,[CF_VERBOSE(add to \$CPPFLAGS $cf_new_cppflags)])
CF_APPEND_TEXT(CPPFLAGS,$cf_new_cppflags)
fi
if test -n "$cf_new_extra_cppflags" ; then
ifelse([$2],,,[CF_VERBOSE(add to \$EXTRA_CPPFLAGS $cf_new_extra_cppflags)])
CF_APPEND_TEXT(EXTRA_CPPFLAGS,$cf_new_extra_cppflags)
fi
AC_SUBST(EXTRA_CPPFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_APPEND_CFLAGS version: 3 updated: 2021/09/05 17:25:40
dnl ----------------
dnl Use CF_ADD_CFLAGS after first checking for potential redefinitions.
dnl $1 = flags to add
dnl $2 = if given makes this macro verbose.
define([CF_APPEND_CFLAGS],
[
for cf_add_cflags in $1
do
case "x$cf_add_cflags" in
(x-[[DU]]*)
CF_REMOVE_CFLAGS($cf_add_cflags,CFLAGS,[$2])
CF_REMOVE_CFLAGS($cf_add_cflags,CPPFLAGS,[$2])
;;
esac
CF_ADD_CFLAGS([$cf_add_cflags],[$2])
done
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_APPEND_TEXT version: 1 updated: 2017/02/25 18:58:55
dnl --------------
dnl use this macro for appending text without introducing an extra blank at
dnl the beginning
define([CF_APPEND_TEXT],
[
test -n "[$]$1" && $1="[$]$1 "
$1="[$]{$1}$2"
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_DISABLE version: 3 updated: 1999/03/30 17:24:31
dnl --------------
dnl Allow user to disable a normally-on option.
AC_DEFUN([CF_ARG_DISABLE],
[CF_ARG_OPTION($1,[$2],[$3],[$4],yes)])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_ENABLE version: 3 updated: 1999/03/30 17:24:31
dnl -------------
dnl Allow user to enable a normally-off option.
AC_DEFUN([CF_ARG_ENABLE],
[CF_ARG_OPTION($1,[$2],[$3],[$4],no)])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ARG_OPTION version: 5 updated: 2015/05/10 19:52:14
dnl -------------
dnl Restricted form of AC_ARG_ENABLE that ensures user doesn't give bogus
dnl values.
dnl
dnl Parameters:
dnl $1 = option name
dnl $2 = help-string
dnl $3 = action to perform if option is not default
dnl $4 = action if perform if option is default
dnl $5 = default option value (either 'yes' or 'no')
AC_DEFUN([CF_ARG_OPTION],
[AC_ARG_ENABLE([$1],[$2],[test "$enableval" != ifelse([$5],no,yes,no) && enableval=ifelse([$5],no,no,yes)
if test "$enableval" != "$5" ; then
ifelse([$3],,[ :]dnl
,[ $3]) ifelse([$4],,,[
else
$4])
fi],[enableval=$5 ifelse([$4],,,[
$4
])dnl
])])dnl
dnl ---------------------------------------------------------------------------
dnl CF_C11_NORETURN version: 4 updated: 2023/02/18 17:41:25
dnl ---------------
AC_DEFUN([CF_C11_NORETURN],
[
AC_MSG_CHECKING(if you want to use C11 _Noreturn feature)
CF_ARG_ENABLE(stdnoreturn,
[ --enable-stdnoreturn enable C11 _Noreturn feature for diagnostics],
[enable_stdnoreturn=yes],
[enable_stdnoreturn=no])
AC_MSG_RESULT($enable_stdnoreturn)
if test $enable_stdnoreturn = yes; then
AC_CACHE_CHECK([for C11 _Noreturn feature], cf_cv_c11_noreturn,
[AC_TRY_COMPILE([
$ac_includes_default
#include <stdnoreturn.h>
static _Noreturn void giveup(void) { exit(0); }
],
[if (feof(stdin)) giveup()],
cf_cv_c11_noreturn=yes,
cf_cv_c11_noreturn=no)
])
else
cf_cv_c11_noreturn=no,
fi
if test "$cf_cv_c11_noreturn" = yes; then
AC_DEFINE(HAVE_STDNORETURN_H, 1,[Define if <stdnoreturn.h> header is available and working])
AC_DEFINE_UNQUOTED(STDC_NORETURN,_Noreturn,[Define if C11 _Noreturn keyword is supported])
HAVE_STDNORETURN_H=1
else
HAVE_STDNORETURN_H=0
fi
AC_SUBST(HAVE_STDNORETURN_H)
AC_SUBST(STDC_NORETURN)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CC_ENV_FLAGS version: 11 updated: 2023/02/20 11:15:46
dnl ---------------
dnl Check for user's environment-breakage by stuffing CFLAGS/CPPFLAGS content
dnl into CC. This will not help with broken scripts that wrap the compiler
dnl with options, but eliminates a more common category of user confusion.
dnl
dnl In particular, it addresses the problem of being able to run the C
dnl preprocessor in a consistent manner.
dnl
dnl Caveat: this also disallows blanks in the pathname for the compiler, but
dnl the nuisance of having inconsistent settings for compiler and preprocessor
dnl outweighs that limitation.
AC_DEFUN([CF_CC_ENV_FLAGS],
[
# This should have been defined by AC_PROG_CC
: "${CC:=cc}"
AC_MSG_CHECKING(\$CFLAGS variable)
case "x$CFLAGS" in
(*-[[IUD]]*)
AC_MSG_RESULT(broken)
AC_MSG_WARN(your environment uses the CFLAGS variable to hold CPPFLAGS options)
cf_flags="$CFLAGS"
CFLAGS=
for cf_arg in $cf_flags
do
CF_ADD_CFLAGS($cf_arg)
done
;;
(*)
AC_MSG_RESULT(ok)
;;
esac
AC_MSG_CHECKING(\$CC variable)
case "$CC" in
(*[[\ \ ]]-*)
AC_MSG_RESULT(broken)
AC_MSG_WARN(your environment uses the CC variable to hold CFLAGS/CPPFLAGS options)
# humor him...
cf_prog=`echo "$CC" | sed -e 's/ / /g' -e 's/[[ ]]* / /g' -e 's/[[ ]]*[[ ]]-[[^ ]].*//'`
cf_flags=`echo "$CC" | sed -e "s%^$cf_prog%%"`
CC="$cf_prog"
for cf_arg in $cf_flags
do
case "x$cf_arg" in
(x-[[IUDfgOW]]*)
CF_ADD_CFLAGS($cf_arg)
;;
(*)
CC="$CC $cf_arg"
;;
esac
done
CF_VERBOSE(resulting CC: '$CC')
CF_VERBOSE(resulting CFLAGS: '$CFLAGS')
CF_VERBOSE(resulting CPPFLAGS: '$CPPFLAGS')
;;
(*)
AC_MSG_RESULT(ok)
;;
esac
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CHECK_CACHE version: 13 updated: 2020/12/31 10:54:15
dnl --------------
dnl Check if we're accidentally using a cache from a different machine.
dnl Derive the system name, as a check for reusing the autoconf cache.
dnl
dnl If we've packaged config.guess and config.sub, run that (since it does a
dnl better job than uname). Normally we'll use AC_CANONICAL_HOST, but allow
dnl an extra parameter that we may override, e.g., for AC_CANONICAL_SYSTEM
dnl which is useful in cross-compiles.
dnl
dnl Note: we would use $ac_config_sub, but that is one of the places where
dnl autoconf 2.5x broke compatibility with autoconf 2.13
AC_DEFUN([CF_CHECK_CACHE],
[
if test -f "$srcdir/config.guess" || test -f "$ac_aux_dir/config.guess" ; then
ifelse([$1],,[AC_CANONICAL_HOST],[$1])
system_name="$host_os"
else
system_name="`(uname -s -r) 2>/dev/null`"
if test -z "$system_name" ; then
system_name="`(hostname) 2>/dev/null`"
fi
fi
test -n "$system_name" && AC_DEFINE_UNQUOTED(SYSTEM_NAME,"$system_name",[Define to the system name.])
AC_CACHE_VAL(cf_cv_system_name,[cf_cv_system_name="$system_name"])
test -z "$system_name" && system_name="$cf_cv_system_name"
test -n "$cf_cv_system_name" && AC_MSG_RESULT(Configuring for $cf_cv_system_name)
if test ".$system_name" != ".$cf_cv_system_name" ; then
AC_MSG_RESULT(Cached system name ($system_name) does not agree with actual ($cf_cv_system_name))
AC_MSG_ERROR("Please remove config.cache and try again.")
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CHECK_ERRNO version: 14 updated: 2023/02/18 17:41:25
dnl --------------
dnl Check for data that is usually declared in <stdio.h> or <errno.h>, e.g.,
dnl the 'errno' variable. Define a DECL_xxx symbol if we must declare it
dnl ourselves.
dnl
dnl $1 = the name to check
dnl $2 = the assumed type
AC_DEFUN([CF_CHECK_ERRNO],
[
AC_CACHE_CHECK(if external $1 is declared, cf_cv_dcl_$1,[
AC_TRY_COMPILE([
$ac_includes_default
#include <errno.h> ],
ifelse([$2],,int,[$2]) x = (ifelse([$2],,int,[$2])) $1; (void)x,
[cf_cv_dcl_$1=yes],
[cf_cv_dcl_$1=no])
])
if test "$cf_cv_dcl_$1" = no ; then
CF_UPPER(cf_result,decl_$1)
AC_DEFINE_UNQUOTED($cf_result)
fi
# It's possible (for near-UNIX clones) that the data doesn't exist
CF_CHECK_EXTERN_DATA($1,ifelse([$2],,int,[$2]))
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CHECK_EXTERN_DATA version: 5 updated: 2021/09/04 06:35:04
dnl --------------------
dnl Check for existence of external data in the current set of libraries. If
dnl we can modify it, it is real enough.
dnl $1 = the name to check
dnl $2 = its type
AC_DEFUN([CF_CHECK_EXTERN_DATA],
[
AC_CACHE_CHECK(if external $1 exists, cf_cv_have_$1,[
AC_TRY_LINK([
#undef $1
extern $2 $1;
],
[$1 = 2],
[cf_cv_have_$1=yes],
[cf_cv_have_$1=no])
])
if test "$cf_cv_have_$1" = yes ; then
CF_UPPER(cf_result,have_$1)
AC_DEFINE_UNQUOTED($cf_result)
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_CLANG_COMPILER version: 9 updated: 2023/02/18 17:41:25
dnl -----------------
dnl Check if the given compiler is really clang. clang's C driver defines
dnl __GNUC__ (fooling the configure script into setting $GCC to yes) but does
dnl not ignore some gcc options.
dnl
dnl This macro should be run "soon" after AC_PROG_CC or AC_PROG_CPLUSPLUS, to
dnl ensure that it is not mistaken for gcc/g++. It is normally invoked from
dnl the wrappers for gcc and g++ warnings.
dnl
dnl $1 = GCC (default) or GXX
dnl $2 = CLANG_COMPILER (default)
dnl $3 = CFLAGS (default) or CXXFLAGS
AC_DEFUN([CF_CLANG_COMPILER],[
ifelse([$2],,CLANG_COMPILER,[$2])=no
if test "$ifelse([$1],,[$1],GCC)" = yes ; then
AC_MSG_CHECKING(if this is really Clang ifelse([$1],GXX,C++,C) compiler)
cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
AC_TRY_COMPILE([],[
#ifdef __clang__
#else
#error __clang__ is not defined
#endif
],[ifelse([$2],,CLANG_COMPILER,[$2])=yes
],[])
ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
AC_MSG_RESULT($ifelse([$2],,CLANG_COMPILER,[$2]))
fi
CLANG_VERSION=none
if test "x$ifelse([$2],,CLANG_COMPILER,[$2])" = "xyes" ; then
case "$CC" in
(c[[1-9]][[0-9]]|*/c[[1-9]][[0-9]])
AC_MSG_WARN(replacing broken compiler alias $CC)
CFLAGS="$CFLAGS -std=`echo "$CC" | sed -e 's%.*/%%'`"
CC=clang
;;
esac
AC_MSG_CHECKING(version of $CC)
CLANG_VERSION="`$CC --version 2>/dev/null | sed -e '2,$d' -e 's/^.*(CLANG[[^)]]*) //' -e 's/^.*(Debian[[^)]]*) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
test -z "$CLANG_VERSION" && CLANG_VERSION=unknown
AC_MSG_RESULT($CLANG_VERSION)
for cf_clang_opt in \
-Qunused-arguments \
-Wno-error=implicit-function-declaration
do
AC_MSG_CHECKING(if option $cf_clang_opt works)
cf_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cf_clang_opt"
AC_TRY_LINK([
#include <stdio.h>],[
printf("hello!\\n");],[
cf_clang_optok=yes],[
cf_clang_optok=no])
AC_MSG_RESULT($cf_clang_optok)
CFLAGS="$cf_save_CFLAGS"
if test "$cf_clang_optok" = yes; then
CF_VERBOSE(adding option $cf_clang_opt)
CF_APPEND_TEXT(CFLAGS,$cf_clang_opt)
fi
done
fi
])
dnl ---------------------------------------------------------------------------
dnl CF_DISABLE_ECHO version: 14 updated: 2021/09/04 06:35:04
dnl ---------------
dnl You can always use "make -n" to see the actual options, but it is hard to
dnl pick out/analyze warning messages when the compile-line is long.
dnl
dnl Sets:
dnl ECHO_LT - symbol to control if libtool is verbose
dnl ECHO_LD - symbol to prefix "cc -o" lines
dnl RULE_CC - symbol to put before implicit "cc -c" lines (e.g., .c.o)
dnl SHOW_CC - symbol to put before explicit "cc -c" lines
dnl ECHO_CC - symbol to put before any "cc" line
dnl
AC_DEFUN([CF_DISABLE_ECHO],[
AC_MSG_CHECKING(if you want to see long compiling messages)
CF_ARG_DISABLE(echo,
[ --disable-echo do not display "compiling" commands],
[
ECHO_LT='--silent'
ECHO_LD='@echo linking [$]@;'
RULE_CC='@echo compiling [$]<'
SHOW_CC='@echo compiling [$]@'
ECHO_CC='@'
],[
ECHO_LT=''
ECHO_LD=''
RULE_CC=''
SHOW_CC=''
ECHO_CC=''
])
AC_MSG_RESULT($enableval)
AC_SUBST(ECHO_LT)
AC_SUBST(ECHO_LD)
AC_SUBST(RULE_CC)
AC_SUBST(SHOW_CC)
AC_SUBST(ECHO_CC)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_ENABLE_WARNINGS version: 9 updated: 2021/01/05 19:40:50
dnl ------------------
dnl Configure-option to enable gcc warnings
dnl
dnl $1 = extra options to add, if supported
dnl $2 = option for checking attributes. By default, this is done when
dnl warnings are enabled. For other values:
dnl yes: always do this, e.g., to use in generated library-headers
dnl no: never do this
AC_DEFUN([CF_ENABLE_WARNINGS],[
if test "$GCC" = yes || test "$GXX" = yes
then
CF_FIX_WARNINGS(CFLAGS)
CF_FIX_WARNINGS(CPPFLAGS)
CF_FIX_WARNINGS(LDFLAGS)
AC_MSG_CHECKING(if you want to turn on gcc warnings)
CF_ARG_ENABLE(warnings,
[ --enable-warnings test: turn on gcc compiler warnings],
[enable_warnings=yes],
[enable_warnings=no])
AC_MSG_RESULT($enable_warnings)
if test "$enable_warnings" = "yes"
then
ifelse($2,,[CF_GCC_ATTRIBUTES])
CF_GCC_WARNINGS($1)
fi
ifelse($2,yes,[CF_GCC_ATTRIBUTES])
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FCNTL_VS_IOCTL version: 5 updated: 2022/12/06 16:25:27
dnl -----------------
dnl Test if we have a usable ioctl with FIONREAD, or if fcntl.h is preferred.
AC_DEFUN([CF_FCNTL_VS_IOCTL],
[
AC_MSG_CHECKING(if we may use FIONREAD)
AC_CACHE_VAL(cf_cv_use_fionread,[
AC_TRY_COMPILE([
#if HAVE_SYS_FILIO_H
# include <sys/filio.h> /* FIONREAD (BSDs) */
#endif
#if HAVE_SYS_IOCTL_H
# include <sys/ioctl.h> /* FIONREAD (other...) */
#endif
],[
int l1;
ioctl (0, FIONREAD, &l1);
],
[cf_cv_use_fionread=yes],
[cf_cv_use_fionread=no])
])
AC_MSG_RESULT($cf_cv_use_fionread)
test $cf_cv_use_fionread = yes && AC_DEFINE(USE_FIONREAD,1,[Define to 1 if we may use FIONREAD])
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_FIX_WARNINGS version: 4 updated: 2021/12/16 18:22:31
dnl ---------------
dnl Warning flags do not belong in CFLAGS, CPPFLAGS, etc. Any of gcc's
dnl "-Werror" flags can interfere with configure-checks. Those go into
dnl EXTRA_CFLAGS.
dnl
dnl $1 = variable name to repair
define([CF_FIX_WARNINGS],[
if test "$GCC" = yes || test "$GXX" = yes
then
case [$]$1 in
(*-Werror=*)
cf_temp_flags=
for cf_temp_scan in [$]$1
do
case "x$cf_temp_scan" in
(x-Werror=format*)
CF_APPEND_TEXT(cf_temp_flags,$cf_temp_scan)
;;
(x-Werror=*)
CF_APPEND_TEXT(EXTRA_CFLAGS,$cf_temp_scan)
;;
(*)
CF_APPEND_TEXT(cf_temp_flags,$cf_temp_scan)
;;
esac
done
if test "x[$]$1" != "x$cf_temp_flags"
then
CF_VERBOSE(repairing $1: [$]$1)
$1="$cf_temp_flags"
CF_VERBOSE(... fixed [$]$1)
CF_VERBOSE(... extra $EXTRA_CFLAGS)
fi
;;
esac
fi
AC_SUBST(EXTRA_CFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_ATTRIBUTES version: 24 updated: 2021/03/20 12:00:25
dnl -----------------
dnl Test for availability of useful gcc __attribute__ directives to quiet
dnl compiler warnings. Though useful, not all are supported -- and contrary
dnl to documentation, unrecognized directives cause older compilers to barf.
AC_DEFUN([CF_GCC_ATTRIBUTES],
[AC_REQUIRE([AC_PROG_FGREP])dnl
AC_REQUIRE([CF_C11_NORETURN])dnl
if test "$GCC" = yes || test "$GXX" = yes
then
cat > conftest.i <<EOF
#ifndef GCC_PRINTF
#define GCC_PRINTF 0
#endif
#ifndef GCC_SCANF
#define GCC_SCANF 0
#endif
#ifndef GCC_NORETURN
#define GCC_NORETURN /* nothing */
#endif
#ifndef GCC_UNUSED
#define GCC_UNUSED /* nothing */
#endif
EOF
if test "$GCC" = yes
then
AC_CHECKING([for $CC __attribute__ directives])
cat > "conftest.$ac_ext" <<EOF
#line __oline__ "${as_me:-configure}"
#include <stdio.h>
#include "confdefs.h"
#include "conftest.h"
#include "conftest.i"
#if GCC_PRINTF
#define GCC_PRINTFLIKE(fmt,var) __attribute__((format(printf,fmt,var)))
#else
#define GCC_PRINTFLIKE(fmt,var) /*nothing*/
#endif
#if GCC_SCANF
#define GCC_SCANFLIKE(fmt,var) __attribute__((format(scanf,fmt,var)))
#else
#define GCC_SCANFLIKE(fmt,var) /*nothing*/
#endif
extern void wow(char *,...) GCC_SCANFLIKE(1,2);
extern GCC_NORETURN void oops(char *,...) GCC_PRINTFLIKE(1,2);
extern GCC_NORETURN void foo(void);
int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { (void)argc; (void)argv; return 0; }
EOF
cf_printf_attribute=no
cf_scanf_attribute=no
for cf_attribute in scanf printf unused noreturn
do
CF_UPPER(cf_ATTRIBUTE,$cf_attribute)
cf_directive="__attribute__(($cf_attribute))"
echo "checking for $CC $cf_directive" 1>&AC_FD_CC
case "$cf_attribute" in
(printf)
cf_printf_attribute=yes
cat >conftest.h <<EOF
#define GCC_$cf_ATTRIBUTE 1
EOF
;;
(scanf)
cf_scanf_attribute=yes
cat >conftest.h <<EOF
#define GCC_$cf_ATTRIBUTE 1
EOF
;;
(*)
cat >conftest.h <<EOF
#define GCC_$cf_ATTRIBUTE $cf_directive
EOF
;;
esac
if AC_TRY_EVAL(ac_compile); then
test -n "$verbose" && AC_MSG_RESULT(... $cf_attribute)
cat conftest.h >>confdefs.h
case "$cf_attribute" in
(noreturn)
AC_DEFINE_UNQUOTED(GCC_NORETURN,$cf_directive,[Define to noreturn-attribute for gcc])
;;
(printf)
cf_value='/* nothing */'
if test "$cf_printf_attribute" != no ; then
cf_value='__attribute__((format(printf,fmt,var)))'
AC_DEFINE(GCC_PRINTF,1,[Define to 1 if the compiler supports gcc-like printf attribute.])
fi
AC_DEFINE_UNQUOTED(GCC_PRINTFLIKE(fmt,var),$cf_value,[Define to printf-attribute for gcc])
;;
(scanf)
cf_value='/* nothing */'
if test "$cf_scanf_attribute" != no ; then
cf_value='__attribute__((format(scanf,fmt,var)))'
AC_DEFINE(GCC_SCANF,1,[Define to 1 if the compiler supports gcc-like scanf attribute.])
fi
AC_DEFINE_UNQUOTED(GCC_SCANFLIKE(fmt,var),$cf_value,[Define to sscanf-attribute for gcc])
;;
(unused)
AC_DEFINE_UNQUOTED(GCC_UNUSED,$cf_directive,[Define to unused-attribute for gcc])
;;
esac
fi
done
else
${FGREP-fgrep} define conftest.i >>confdefs.h
fi
rm -rf ./conftest*
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_VERSION version: 9 updated: 2023/03/05 14:30:13
dnl --------------
dnl Find version of gcc, and (because icc/clang pretend to be gcc without being
dnl compatible), attempt to determine if icc/clang is actually used.
AC_DEFUN([CF_GCC_VERSION],[
AC_REQUIRE([AC_PROG_CC])
GCC_VERSION=none
if test "$GCC" = yes ; then
AC_MSG_CHECKING(version of $CC)
GCC_VERSION="`${CC} --version 2>/dev/null | sed -e '2,$d' -e 's/^[[^(]]*([[^)]][[^)]]*) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
test -z "$GCC_VERSION" && GCC_VERSION=unknown
AC_MSG_RESULT($GCC_VERSION)
fi
CF_INTEL_COMPILER(GCC,INTEL_COMPILER,CFLAGS)
CF_CLANG_COMPILER(GCC,CLANG_COMPILER,CFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GCC_WARNINGS version: 41 updated: 2021/01/01 16:53:59
dnl ---------------
dnl Check if the compiler supports useful warning options. There's a few that
dnl we don't use, simply because they're too noisy:
dnl
dnl -Wconversion (useful in older versions of gcc, but not in gcc 2.7.x)
dnl -Winline (usually not worthwhile)
dnl -Wredundant-decls (system headers make this too noisy)
dnl -Wtraditional (combines too many unrelated messages, only a few useful)
dnl -Wwrite-strings (too noisy, but should review occasionally). This
dnl is enabled for ncurses using "--enable-const".
dnl -pedantic
dnl
dnl Parameter:
dnl $1 is an optional list of gcc warning flags that a particular
dnl application might want to use, e.g., "no-unused" for
dnl -Wno-unused
dnl Special:
dnl If $with_ext_const is "yes", add a check for -Wwrite-strings
dnl
AC_DEFUN([CF_GCC_WARNINGS],
[
AC_REQUIRE([CF_GCC_VERSION])
if test "x$have_x" = xyes; then CF_CONST_X_STRING fi
cat > "conftest.$ac_ext" <<EOF
#line __oline__ "${as_me:-configure}"
int main(int argc, char *argv[[]]) { return (argv[[argc-1]] == 0) ; }
EOF
if test "$INTEL_COMPILER" = yes
then
# The "-wdXXX" options suppress warnings:
# remark #1419: external declaration in primary source file
# remark #1683: explicit conversion of a 64-bit integral type to a smaller integral type (potential portability problem)
# remark #1684: conversion from pointer to same-sized integral type (potential portability problem)
# remark #193: zero used for undefined preprocessing identifier
# remark #593: variable "curs_sb_left_arrow" was set but never used
# remark #810: conversion from "int" to "Dimension={unsigned short}" may lose significant bits
# remark #869: parameter "tw" was never referenced
# remark #981: operands are evaluated in unspecified order
# warning #279: controlling expression is constant
AC_CHECKING([for $CC warning options])
cf_save_CFLAGS="$CFLAGS"
EXTRA_CFLAGS="$EXTRA_CFLAGS -Wall"
for cf_opt in \
wd1419 \
wd1683 \
wd1684 \
wd193 \
wd593 \
wd279 \
wd810 \
wd869 \
wd981
do
CFLAGS="$cf_save_CFLAGS $EXTRA_CFLAGS -$cf_opt"
if AC_TRY_EVAL(ac_compile); then
test -n "$verbose" && AC_MSG_RESULT(... -$cf_opt)
EXTRA_CFLAGS="$EXTRA_CFLAGS -$cf_opt"
fi
done
CFLAGS="$cf_save_CFLAGS"
elif test "$GCC" = yes && test "$GCC_VERSION" != "unknown"
then
AC_CHECKING([for $CC warning options])
cf_save_CFLAGS="$CFLAGS"
cf_warn_CONST=""
test "$with_ext_const" = yes && cf_warn_CONST="Wwrite-strings"
cf_gcc_warnings="Wignored-qualifiers Wlogical-op Wvarargs"
test "x$CLANG_COMPILER" = xyes && cf_gcc_warnings=
for cf_opt in W Wall \
Wbad-function-cast \
Wcast-align \
Wcast-qual \
Wdeclaration-after-statement \
Wextra \
Winline \
Wmissing-declarations \
Wmissing-prototypes \
Wnested-externs \
Wpointer-arith \
Wshadow \
Wstrict-prototypes \
Wundef Wno-inline $cf_gcc_warnings $cf_warn_CONST $1
do
CFLAGS="$cf_save_CFLAGS $EXTRA_CFLAGS -$cf_opt"
if AC_TRY_EVAL(ac_compile); then
test -n "$verbose" && AC_MSG_RESULT(... -$cf_opt)
case "$cf_opt" in
(Winline)
case "$GCC_VERSION" in
([[34]].*)
CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
continue;;
esac
;;
(Wpointer-arith)
case "$GCC_VERSION" in
([[12]].*)
CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
continue;;
esac
;;
esac
EXTRA_CFLAGS="$EXTRA_CFLAGS -$cf_opt"
fi
done
CFLAGS="$cf_save_CFLAGS"
fi
rm -rf ./conftest*
AC_SUBST(EXTRA_CFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_GNU_SOURCE version: 10 updated: 2018/12/10 20:09:41
dnl -------------
dnl Check if we must define _GNU_SOURCE to get a reasonable value for
dnl _XOPEN_SOURCE, upon which many POSIX definitions depend. This is a defect
dnl (or misfeature) of glibc2, which breaks portability of many applications,
dnl since it is interwoven with GNU extensions.
dnl
dnl Well, yes we could work around it...
dnl
dnl Parameters:
dnl $1 is the nominal value for _XOPEN_SOURCE
AC_DEFUN([CF_GNU_SOURCE],
[
cf_gnu_xopen_source=ifelse($1,,500,$1)
AC_CACHE_CHECK(if this is the GNU C library,cf_cv_gnu_library,[
AC_TRY_COMPILE([#include <sys/types.h>],[
#if __GLIBC__ > 0 && __GLIBC_MINOR__ >= 0
return 0;
#elif __NEWLIB__ > 0 && __NEWLIB_MINOR__ >= 0
return 0;
#else
# error not GNU C library
#endif],
[cf_cv_gnu_library=yes],
[cf_cv_gnu_library=no])
])
if test x$cf_cv_gnu_library = xyes; then
# With glibc 2.19 (13 years after this check was begun), _DEFAULT_SOURCE
# was changed to help a little. newlib incorporated the change about 4
# years later.
AC_CACHE_CHECK(if _DEFAULT_SOURCE can be used as a basis,cf_cv_gnu_library_219,[
cf_save="$CPPFLAGS"
CF_APPEND_TEXT(CPPFLAGS,-D_DEFAULT_SOURCE)
AC_TRY_COMPILE([#include <sys/types.h>],[
#if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19) || (__GLIBC__ > 2)
return 0;
#elif (__NEWLIB__ == 2 && __NEWLIB_MINOR__ >= 4) || (__GLIBC__ > 3)
return 0;
#else
# error GNU C library __GLIBC__.__GLIBC_MINOR__ is too old
#endif],
[cf_cv_gnu_library_219=yes],
[cf_cv_gnu_library_219=no])
CPPFLAGS="$cf_save"
])
if test "x$cf_cv_gnu_library_219" = xyes; then
cf_save="$CPPFLAGS"
AC_CACHE_CHECK(if _XOPEN_SOURCE=$cf_gnu_xopen_source works with _DEFAULT_SOURCE,cf_cv_gnu_dftsrc_219,[
CF_ADD_CFLAGS(-D_DEFAULT_SOURCE -D_XOPEN_SOURCE=$cf_gnu_xopen_source)
AC_TRY_COMPILE([
#include <limits.h>
#include <sys/types.h>
],[
#if (_XOPEN_SOURCE >= $cf_gnu_xopen_source) && (MB_LEN_MAX > 1)
return 0;
#else
# error GNU C library is too old
#endif],
[cf_cv_gnu_dftsrc_219=yes],
[cf_cv_gnu_dftsrc_219=no])
])
test "x$cf_cv_gnu_dftsrc_219" = "xyes" || CPPFLAGS="$cf_save"
else
cf_cv_gnu_dftsrc_219=maybe
fi
if test "x$cf_cv_gnu_dftsrc_219" != xyes; then
AC_CACHE_CHECK(if we must define _GNU_SOURCE,cf_cv_gnu_source,[
AC_TRY_COMPILE([#include <sys/types.h>],[
#ifndef _XOPEN_SOURCE
#error expected _XOPEN_SOURCE to be defined
#endif],
[cf_cv_gnu_source=no],
[cf_save="$CPPFLAGS"
CF_ADD_CFLAGS(-D_GNU_SOURCE)
AC_TRY_COMPILE([#include <sys/types.h>],[
#ifdef _XOPEN_SOURCE
#error expected _XOPEN_SOURCE to be undefined
#endif],
[cf_cv_gnu_source=no],
[cf_cv_gnu_source=yes])
CPPFLAGS="$cf_save"
])
])
if test "$cf_cv_gnu_source" = yes
then
AC_CACHE_CHECK(if we should also define _DEFAULT_SOURCE,cf_cv_default_source,[
CF_APPEND_TEXT(CPPFLAGS,-D_GNU_SOURCE)
AC_TRY_COMPILE([#include <sys/types.h>],[
#ifdef _DEFAULT_SOURCE
#error expected _DEFAULT_SOURCE to be undefined
#endif],
[cf_cv_default_source=no],
[cf_cv_default_source=yes])
])
if test "$cf_cv_default_source" = yes
then
CF_APPEND_TEXT(CPPFLAGS,-D_DEFAULT_SOURCE)
fi
fi
fi
fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_INTEL_COMPILER version: 9 updated: 2023/02/18 17:41:25
dnl -----------------
dnl Check if the given compiler is really the Intel compiler for Linux. It
dnl tries to imitate gcc, but does not return an error when it finds a mismatch
dnl between prototypes, e.g., as exercised by CF_MISSING_CHECK.
dnl
dnl This macro should be run "soon" after AC_PROG_CC or AC_PROG_CPLUSPLUS, to
dnl ensure that it is not mistaken for gcc/g++. It is normally invoked from
dnl the wrappers for gcc and g++ warnings.
dnl
dnl $1 = GCC (default) or GXX
dnl $2 = INTEL_COMPILER (default) or INTEL_CPLUSPLUS
dnl $3 = CFLAGS (default) or CXXFLAGS
AC_DEFUN([CF_INTEL_COMPILER],[
AC_REQUIRE([AC_CANONICAL_HOST])
ifelse([$2],,INTEL_COMPILER,[$2])=no
if test "$ifelse([$1],,[$1],GCC)" = yes ; then
case "$host_os" in
(linux*|gnu*)
AC_MSG_CHECKING(if this is really Intel ifelse([$1],GXX,C++,C) compiler)