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construct/tools/m4/charybdis.m4
2018-09-17 18:52:26 -07:00

136 lines
3.3 KiB
Text

AC_DEFUN([AC_DEFINE_DIR], [
test "x$prefix" = xNONE && prefix="$ac_default_prefix"
test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
last_ac_define_dir=`eval echo [$]$2`
ac_define_dir=`eval echo [$]last_ac_define_dir`
ac_define_dir_counter=0
while test "x[$]last_ac_define_dir" != "x[$]ac_define_dir"; do
last_ac_define_dir="[$]ac_define_dir"
ac_define_dir=`eval echo [$]last_ac_define_dir`
AS_VAR_ARITH([ac_define_dir_counter], [$ac_define_dir_counter + 1])
AS_VAR_IF([ac_define_dir_counter], [128],
[AC_MSG_ERROR([detected recusive directory expansion when expanding $1=[$]$2: [$]ac_define_dir])
break])
done
$1="$ac_define_dir"
AC_SUBST($1)
ifelse($3, ,
AC_DEFINE_UNQUOTED($1, "$ac_define_dir"),
AC_DEFINE_UNQUOTED($1, "$ac_define_dir", $3))
])
AC_DEFUN([AC_SUBST_DIR], [
ifelse($2,,,$1="[$]$2")
$1=`(
test "x$prefix" = xNONE && prefix="$ac_default_prefix"
test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
eval echo \""[$]$1"\"
)`
AC_SUBST($1)
])
dnl CHARYBDIS_C_GCC_TRY_FLAGS(<warnings>,<cachevar>)
AC_DEFUN([CHARYBDIS_C_GCC_TRY_FLAGS],[
AC_MSG_CHECKING([GCC flag(s) $1])
if test "${GCC-no}" = yes
then
AC_CACHE_VAL($2,[
oldcflags="${CXXFLAGS-}"
CXXFLAGS="${CXXFLAGS-} ${CWARNS} $1 -Werror"
AC_TRY_COMPILE([
#include <string.h>
#include <stdio.h>
int main(void);
],[
(void)strcmp("a","b"); fprintf(stdout,"test ok\n");
], [$2=yes], [$2=no])
CXXFLAGS="${oldcflags}"])
if test "x$$2" = xyes; then
CWARNS="${CWARNS}$1 "
AC_MSG_RESULT(ok)
else
$2=''
AC_MSG_RESULT(no)
fi
else
AC_MSG_RESULT(no, not using GCC)
fi
])
AC_DEFUN([RB_CHECK_TIMER_CREATE],[AC_CACHE_CHECK([for a working timer_create(CLOCK_REALTIME)],
[rb__cv_timer_create_works], [AC_TRY_RUN([
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
int main(int argc, char *argv[])
{
#if HAVE_TIMER_CREATE
struct sigevent ev;
timer_t timer;
ev.sigev_notify = SIGEV_SIGNAL;
ev.sigev_signo = SIGVTALRM;
if (timer_create(CLOCK_REALTIME, &ev, &timer) != 0) {
return 1;
}
#else
return 1;
#endif
return 0;
}
],
[rb__cv_timer_create_works=yes],
[rb__cv_timer_create_works=no],
[rb__cv_timer_create_works=no])
])
case $rb__cv_timer_create_works in
yes) AC_DEFINE([USE_TIMER_CREATE], 1,
[Define to 1 if we can use timer_create(CLOCK_REALTIME,...)]);;
esac
])
AC_DEFUN([RB_CHECK_TIMERFD_CREATE], [AC_CACHE_CHECK([for a working timerfd_create(CLOCK_REALTIME)],
[rb__cv_timerfd_create_works], [AC_TRY_RUN([
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TIMERFD_H
#include <sys/timerfd.h>
#endif
int main(int argc, char *argv[])
{
#if defined(HAVE_TIMERFD_CREATE) && defined(HAVE_SYS_TIMERFD_H)
if (timerfd_create(CLOCK_REALTIME, 0) < 0) {
return 1;
}
#else
return 1;
#endif
return 0;
}
],
[rb__cv_timerfd_create_works=yes],
[rb__cv_timerfd_create_works=no],
[rb__cv_timerfd_create_works=no])
])
case $rb__cv_timerfd_create_works in
yes) AC_DEFINE([USE_TIMERFD_CREATE], 1,
[Define to 1 if we can use timerfd_create(CLOCK_REALTIME,...)]);;
esac
])