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dnl aclocal.m4 -- custom autoconf macros for various purposes
dnl Updated for Autoconf v2
dnl
dnl ******** save/restore stuff **********
define(AC_KNFSD_SAVE,
[AC_LANG_SAVE
save_LDFLAGS=$LDFLAGS
save_CFLAGS=$CFLAGS
save_CXXFLAGS=$CXXFLAGS
save_LIBS=$LIBS
])dnl
define(AC_KNFSD_RESTORE,
[LDFLAGS=$save_LDFLAGS
CFLAGS=$save_CFLAGS
CXXFLAGS=$save_CXXFLAGS
LIBS=$save_LIBS
AC_LANG_RESTORE
])dnl
dnl *********** GNU libc 2 ***************
define(AC_GNULIBC,
[AC_MSG_CHECKING(for GNU libc2)
AC_CACHE_VAL(knfsd_cv_glibc2,
[AC_TRY_CPP([
#include <features.h>
#if !defined(__GLIBC__)
# error Nope
#endif], knfsd_cv_glibc2=yes, knfsd_cv_glibc2=no)])
AC_MSG_RESULT($knfsd_cv_glibc2)
if test $knfsd_cv_glibc2 = yes; then
CFLAGS="$CFLAGS -D_GNU_SOURCE"
CXXFLAGS="$CXXFLAGS -D_GNU_SOURCE"
fi
]) dnl
dnl
dnl ************* egcs *******************
define(AC_PROG_EGCS,
[AC_MSG_CHECKING(for egcs)
AC_CACHE_VAL(knfsd_cv_prog_EGCS,
[case `$CC --version 2>/dev/null` in
egcs*)
knfsd_cv_prog_EGCS=yes;;
*)
knfsd_cv_prog_EGCS=no;;
esac
])
AC_MSG_RESULT($knfsd_cv_prog_EGCS)
test $knfsd_cv_prog_EGCS = yes && AC_DEFINE(HAVE_EGCS)
]) dnl
dnl *********** sizeof(dev_t) **************
dnl ** We have to kludge this rather than use AC_CHECK_SIZEOF because
dnl ** we have to include sys/types.h. Ugh.
define(AC_DEV_T_SIZE,
[AC_MSG_CHECKING(size of dev_t)
AC_CACHE_VAL(ac_cv_sizeof_dev_t,
[AC_TRY_RUN(
[#include <stdio.h>
#include <sys/types.h>
main()
{
FILE *f=fopen("conftestval", "w");
if (!f) exit(1);
fprintf(f, "%d\n", sizeof(dev_t));
exit(0);
}], ac_cv_sizeof_dev_t=`cat conftestval`, ac_cv_sizeof_dev_t=0)])
AC_MSG_RESULT($ac_cv_sizeof_dev_t)
AC_DEFINE(SIZEOF_DEV_T,$ac_cv_sizeof_dev_t)
])
dnl *********** sizeof(xxx_t) **************
dnl ** Overwrite the AC_CHECK_SIZEOF macro as we must include sys/types.h
define([AC_CHECK_SIZEOF],
[changequote(<<, >>)dnl
define(<<AC_TYPE_NAME>>,translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
changequote([, ])dnl
AC_MSG_CHECKING(size of $1)
AC_CACHE_VAL(AC_CV_NAME,
[AC_TRY_RUN(
[#include <stdio.h>
#include <sys/types.h>
main()
{
FILE *f=fopen("conftestval", "w");
if (!f) exit(1);
fprintf(f, "%d\n", sizeof($1));
exit(0);
}], AC_CV_NAME=`cat conftestval`, AC_CV_NAME=0)])
AC_MSG_RESULT($AC_CV_NAME)
AC_DEFINE_UNQUOTED(AC_TYPE_NAME,$AC_CV_NAME)
undefine([AC_TYPE_NAME])dnl
undefine([AC_CV_NAME])dnl
])
dnl *********** BSD vs. POSIX signal handling **************
define([AC_BSD_SIGNALS],
[AC_MSG_CHECKING(for BSD signal semantics)
AC_CACHE_VAL(knfsd_cv_bsd_signals,
[AC_TRY_RUN([
#include <signal.h>
#include <unistd.h>
#include <sys/wait.h>
static int counter = 0;
static RETSIGTYPE handler(int num) { counter++; }
int main()
{
int s;
if ((s = fork()) < 0) return 1;
if (s != 0) {
if (wait(&s) < 0) return 1;
return WIFSIGNALED(s)? 1 : 0;
}
signal(SIGHUP, handler);
kill(getpid(), SIGHUP); kill(getpid(), SIGHUP);
return (counter == 2)? 0 : 1;
}
], knfsd_cv_bsd_signals=yes, knfsd_cv_bsd_signals=no)]) dnl
AC_MSG_RESULT($knfsd_cv_bsd_signals)
test $knfsd_cv_bsd_signals = yes && AC_DEFINE(HAVE_BSD_SIGNALS)
])dnl
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