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gnupg/acinclude.m4

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dnl macros to configure g10
dnl GNUPG_MSG_PRINT(STRING)
dnl print a message
dnl
define(GNUPG_MSG_PRINT,
[ echo $ac_n "$1"" $ac_c" 1>&AC_FD_MSG
])
dnl GNUPG_CHECK_TYPEDEF(TYPE, HAVE_NAME)
dnl Check whether a typedef exists and create a #define $2 if it exists
dnl
AC_DEFUN(GNUPG_CHECK_TYPEDEF,
[ AC_MSG_CHECKING(for $1 typedef)
AC_CACHE_VAL(gnupg_cv_typedef_$1,
[AC_TRY_COMPILE([#include <stdlib.h>
#include <sys/types.h>], [
#undef $1
int a = sizeof($1);
], gnupg_cv_typedef_$1=yes, gnupg_cv_typedef_$1=no )])
AC_MSG_RESULT($gnupg_cv_typedef_$1)
if test "$gnupg_cv_typedef_$1" = yes; then
AC_DEFINE($2)
fi
])
dnl GNUPG_LINK_FILES( SRC, DEST )
dnl same as AC_LINK_FILES, but collect the files to link in
dnl some special variables and do the link
dnl when GNUPG_DO_LINK_FILES is called
dnl This is a workaround for AC_LINK_FILES, because it does not work
dnl correct when using a caching scheme
dnl
define(GNUPG_LINK_FILES,
[ if test "x$wk_link_files_src" = "x"; then
wk_link_files_src="$1"
wk_link_files_dst="$2"
else
wk_link_files_src="$wk_link_files_src $1"
wk_link_files_dst="$wk_link_files_dst $2"
fi
])
define(GNUPG_DO_LINK_FILES,
[ AC_LINK_FILES( $wk_link_files_src, $wk_link_files_dst )
])
dnl GNUPG_CHECK_ENDIAN
dnl define either LITTLE_ENDIAN_HOST or BIG_ENDIAN_HOST
dnl
define(GNUPG_CHECK_ENDIAN,
[ if test "$cross_compiling" = yes; then
AC_MSG_WARN(cross compiling; assuming little endianess)
fi
AC_MSG_CHECKING(endianess)
AC_CACHE_VAL(gnupg_cv_c_endian,
[ gnupg_cv_c_endian=unknown
# See if sys/param.h defines the BYTE_ORDER macro.
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/param.h>], [
#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
bogus endian macros
#endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/param.h>], [
#if BYTE_ORDER != BIG_ENDIAN
not big endian
#endif], gnupg_cv_c_endian=big, gnupg_cv_c_endian=little)])
if test "$gnupg_cv_c_endian" = unknown; then
AC_TRY_RUN([main () {
/* Are we little or big endian? From Harbison&Steele. */
union
{
long l;
char c[sizeof (long)];
} u;
u.l = 1;
exit (u.c[sizeof (long) - 1] == 1);
}],
gnupg_cv_c_endian=little,
gnupg_cv_c_endian=big,
gnupg_cv_c_endian=little
)
fi
])
AC_MSG_RESULT([$gnupg_cv_c_endian])
if test "$gnupg_cv_c_endian" = little; then
AC_DEFINE(LITTLE_ENDIAN_HOST)
else
AC_DEFINE(BIG_ENDIAN_HOST)
fi
])
dnl GNUPG_CHECK_CACHE
dnl
define(GNUPG_CHECK_CACHE,
[ AC_MSG_CHECKING(cached information)
gnupg_hostcheck="$target"
AC_CACHE_VAL(gnupg_cv_hostcheck, [ gnupg_cv_hostcheck="$gnupg_hostcheck" ])
if test "$gnupg_cv_hostcheck" != "$gnupg_hostcheck"; then
AC_MSG_RESULT(changed)
AC_MSG_WARN(config.cache exists!)
AC_MSG_ERROR(you must do 'make distclean' first to compile for
different target or different parameters.)
else
AC_MSG_RESULT(ok)
fi
])
######################################################################
# Check for -fPIC etc (taken from libtool)
# This sets CFLAGS_PIC to the required flags
# NO_PIC to yes if it is not possible to
# generate PIC
######################################################################
dnl GNUPG_CHECK_PIC
dnl
define(GNUPG_CHECK_PIC,
[ AC_MSG_CHECKING(for option to create PIC)
CFLAGS_PIC=
NO_PIC=no
if test "$cross_compiling" = yes; then
AC_MSG_RESULT(assume none)
else
if test "$GCC" = yes; then
CFLAGS_PIC="-fPIC"
else
case "$host_os" in
aix3* | aix4*)
# All rs/6000 code is PIC
# but is there any non-rs/6000 AIX platform?
;;
hpux9* | hpux10*)
CFLAGS_PIC="+Z"
;;
irix5* | irix6*)
# PIC (with -KPIC) is the default.
;;
osf3* | osf4*)
# FIXME - pic_flag is probably required for
# hppa*-osf* and i860-osf*
;;
sco3.2v5*)
CFLAGS_PIC='-Kpic'
;;
solaris2* | solaris7* )
CFLAGS_PIC='-KPIC'
;;
sunos4*)
CFLAGS_PIC='-PIC'
;;
*)
NO_PIC=yes
;;
esac
fi
case "$host_cpu" in
rs6000 | powerpc | powerpcle)
# Yippee! All RS/6000 and PowerPC code is position-independent.
CFLAGS_PIC=""
;;
esac
if test "$NO_PIC" = yes; then
AC_MSG_RESULT(not possible)
else
if test -z "$CFLAGS_PIC"; then
AC_MSG_RESULT(none)
else
AC_MSG_RESULT($CFLAGS_PIC)
fi
fi
fi
])
######################################################################
# Check for rdynamic flag
# This sets CFLAGS_RDYNAMIC to the required flags
######################################################################
dnl GNUPG_CHECK_RDYNAMIC
dnl
define(GNUPG_CHECK_RDYNAMIC,
[ AC_MSG_CHECKING(how to specify -rdynamic)
CFLAGS_RDYNAMIC=
if test "$cross_compiling" = yes; then
AC_MSG_RESULT(assume none)
else
case "$host_os" in
solaris* )
CFLAGS_RDYNAMIC="-Wl,-dy"
;;
freebsd2* | osf4* )
CFLAGS_RDYNAMIC=""
;;
* )
CFLAGS_RDYNAMIC="-Wl,-export-dynamic"
;;
esac
AC_MSG_RESULT($CFLAGS_RDYNAMIC)
fi
])
#####################################################################
# Check for SysV IPC (from GIMP)
# And see whether we have a SHM_LOCK (FreeBSD does not have it).
#####################################################################
dnl GNUPG_CHECK_IPC
dnl
define(GNUPG_CHECK_IPC,
[ AC_CHECK_HEADERS(sys/ipc.h sys/shm.h)
if test "$ac_cv_header_sys_shm_h" = "yes"; then
AC_MSG_CHECKING(whether IPC_RMID allowes subsequent attaches)
AC_CACHE_VAL(gnupg_cv_ipc_rmid_deferred_release,
AC_TRY_RUN([
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
int main()
{
int id;
char *shmaddr;
id = shmget (IPC_PRIVATE, 4, IPC_CREAT | 0777);
if (id == -1)
exit (2);
shmaddr = shmat (id, 0, 0);
shmctl (id, IPC_RMID, 0);
if ((char*) shmat (id, 0, 0) == (char*) -1)
{
shmdt (shmaddr);
exit (1);
}
shmdt (shmaddr);
shmdt (shmaddr);
exit (0);
}
],
gnupg_cv_ipc_rmid_deferred_release="yes",
gnupg_cv_ipc_rmid_deferred_release="no",
gnupg_cv_ipc_rmid_deferred_release="assume-no")
)
if test "$gnupg_cv_ipc_rmid_deferred_release" = "yes"; then
AC_DEFINE(IPC_RMID_DEFERRED_RELEASE)
AC_MSG_RESULT(yes)
else
if test "$gnupg_cv_ipc_rmid_deferred_release" = "no"; then
AC_MSG_RESULT(no)
else
AC_MSG_RESULT([assuming no])
fi
fi
AC_MSG_CHECKING(whether SHM_LOCK is available)
AC_CACHE_VAL(gnupg_cv_ipc_have_shm_lock,
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>],[
int foo( int shm_id ) { shmctl(shm_id, SHM_LOCK, 0); }
],
gnupg_cv_ipc_have_shm_lock="yes",
gnupg_cv_ipc_have_shm_lock="no"
)
)
if test "$gnupg_cv_ipc_have_shm_lock" = "yes"; then
AC_DEFINE(IPC_HAVE_SHM_LOCK)
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
fi
])
######################################################################
# Check whether mlock is broken (hpux 10.20 raises a SIGBUS if mlock
# is not called from uid 0 (not tested whether uid 0 works)
######################################################################
dnl GNUPG_CHECK_MLOCK
dnl
define(GNUPG_CHECK_MLOCK,
[ AC_CHECK_FUNCS(mlock)
if test "$ac_cv_func_mlock" = "yes"; then
AC_MSG_CHECKING(whether mlock is broken)
AC_CACHE_VAL(gnupg_cv_have_broken_mlock,
AC_TRY_RUN([
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <fcntl.h>
int main()
{
char *pool;
int err;
long int pgsize = getpagesize();
pool = malloc( 4096 + pgsize );
if( !pool )
return 2;
pool += (pgsize - ((long int)pool % pgsize));
err = mlock( pool, 4096 );
if( !err || errno == EPERM )
return 0; /* okay */
return 1; /* hmmm */
}
],
gnupg_cv_have_broken_mlock="no",
gnupg_cv_have_broken_mlock="yes",
gnupg_cv_have_broken_mlock="assume-no"
)
)
if test "$gnupg_cv_have_broken_mlock" = "yes"; then
AC_DEFINE(HAVE_BROKEN_MLOCK)
AC_MSG_RESULT(yes)
else
if test "$gnupg_cv_have_broken_mlock" = "no"; then
AC_MSG_RESULT(no)
else
AC_MSG_RESULT(assuming no)
fi
fi
fi
])
dnl *-*wedit:notab*-* Please keep this as the last line.
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