source4/build/m4/rewrite.m4

   1 dnl Checks for programs.
   2 dnl Unique-to-Samba variables we'll be playing with.
   3
   4 DYNEXP=
   5
   6 AC_SUBST(SHLIBEXT)
   7 AC_SUBST(LDSHFLAGS)
   8 AC_SUBST(SONAMEFLAG)
   9 AC_SUBST(PICFLAG)
  10
  11 AC_SYS_LARGEFILE
  12
  13 #
  14 # Config CPPFLAG settings for strange OS's that must be set
  15 # before other tests.
  16 #
  17 case "$host_os" in
  18 # Try to work out if this is the native HPUX compiler that uses the -Ae flag.
  19     *hpux*)
  20       AC_PROG_CC_FLAG(Ae)
  21       # mmap on HPUX is completely broken...
  22       AC_DEFINE(MMAP_BLACKLIST, 1, [Whether MMAP is broken])
  23       if test $ac_cv_prog_cc_Ae = yes; then
  24         CPPFLAGS="$CPPFLAGS -Ae"
  25       fi
  26     ;;
  27 #
  28 # VOS may need to have POSIX support and System V compatibility enabled.
  29 #
  30     *vos*)
  31           case "$CPPFLAGS" in
  32               *-D_POSIX_C_SOURCE*)
  33                 ;;
  34           *)
  35                 CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=200112L"
  36                 AC_DEFINE(_POSIX_C_SOURCE, 200112L, [Whether to enable POSIX support])
  37                 ;;
  38           esac
  39           case "$CPPFLAGS" in
  40              *-D_SYSV*|*-D_SVID_SOURCE*)
  41                 ;;
  42              *)
  43                 CPPFLAGS="$CPPFLAGS -D_SYSV"
  44                 AC_DEFINE(_SYSV, 1, [Whether to enable System V compatibility])
  45           esac
  46     ;;
  47
  48 esac
  49
  50
  51 AC_HEADER_DIRENT
  52 AC_HEADER_TIME
  53 AC_HEADER_SYS_WAIT
  54 AC_CHECK_HEADERS(sys/select.h fcntl.h sys/fcntl.h sys/time.h stdarg.h)
  55 AC_CHECK_HEADERS(utime.h grp.h sys/id.h limits.h compat.h math.h)
  56 AC_CHECK_HEADERS(sys/param.h ctype.h sys/wait.h sys/resource.h sys/ioctl.h sys/ipc.h sys/mode.h)
  57 AC_CHECK_HEADERS(sys/mman.h sys/filio.h sys/priv.h sys/shm.h string.h strings.h stdlib.h)
  58 AC_CHECK_HEADERS(sys/vfs.h sys/fs/s5param.h sys/filsys.h termios.h termio.h)
  59 AC_CHECK_HEADERS(fnmatch.h pwd.h sys/termio.h sys/time.h)
  60 AC_CHECK_HEADERS(locale.h shadow.h)
  61 AC_CHECK_HEADERS(nss.h nss_common.h ns_api.h sys/security.h)
  62 AC_CHECK_HEADERS(sys/acl.h)
  63
  64 AC_CHECK_HEADERS(sys/capability.h)
  65
  66 AC_CHECK_HEADERS(sys/mount.h, , , [AC_INCLUDES_DEFAULT
  67 #ifdef HAVE_SYS_PARAM_H
  68 #include <sys/param.h>
  69 #endif])
  70
  71
  72 AC_TYPE_SIGNAL
  73 AC_TYPE_UID_T
  74 AC_TYPE_MODE_T
  75 AC_TYPE_OFF_T
  76 AC_TYPE_SIZE_T
  77 AC_TYPE_PID_T
  78 AC_STRUCT_ST_RDEV
  79 AC_DIRENT_D_OFF
  80 AC_CHECK_TYPE(ino_t,unsigned)
  81 AC_CHECK_TYPE(loff_t,off_t)
  82 AC_CHECK_TYPE(offset_t,loff_t)
  83 AC_CHECK_TYPES(long long)
  84
  85
  86 AC_CACHE_CHECK([for sig_atomic_t type],samba_cv_sig_atomic_t, [
  87     AC_TRY_COMPILE([
  88 #include <sys/types.h>
  89 #if STDC_HEADERS
  90 #include <stdlib.h>
  91 #include <stddef.h>
  92 #endif
  93 #include <signal.h>],[sig_atomic_t i = 0],
  94         samba_cv_sig_atomic_t=yes,samba_cv_sig_atomic_t=no)])
  95 if test x"$samba_cv_sig_atomic_t" = x"yes"; then
  96    AC_DEFINE(HAVE_SIG_ATOMIC_T_TYPE,1,[Whether we have the atomic_t variable type])
  97 fi
  98
  99 AC_FUNC_MEMCMP
 100
 101 AC_CHECK_FUNCS(setsid pipe crypt16 getauthuid)
 102 AC_CHECK_FUNCS(strftime sigprocmask sigblock sigaction)
 103 AC_CHECK_FUNCS(setgroups sysconf getpwanam srandom random srand rand usleep)
 104 AC_CHECK_FUNCS(backtrace setbuffer)
 105
 106 AC_SUBST(BLDSHARED)
 107 AC_SUBST(BLDMERGED)
 108 # Assume non-shared by default and override below
 109 BLDSHARED="false"
 110 BLDMERGED="true"
 111
 112 # these are the defaults, good for lots of systems
 113 HOST_OS="$host_os"
 114 LDSHFLAGS="-shared"
 115 SONAMEFLAG="#"
 116 SHLD="\${CC}"
 117 PICFLAG=""
 118 PICSUFFIX="po"
 119 POBAD_CC="#"
 120 SHLIBEXT="so"
 121
 122 AC_MSG_CHECKING([ability to build shared libraries])
 123
 124 # and these are for particular systems
 125 case "$host_os" in
 126         *linux*)   AC_DEFINE(LINUX,1,[Whether the host os is linux])
 127                 BLDSHARED="true"
 128                 LDSHFLAGS="-shared"
 129                 DYNEXP="-Wl,--export-dynamic"
 130                 PICFLAG="-fPIC"
 131                 SONAMEFLAG="-Wl,-soname="
 132                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 133                 ;;
 134         *solaris*) AC_DEFINE(SUNOS5,1,[Whether the host os is solaris])
 135                 BLDSHARED="true"
 136                 LDSHFLAGS="-G"
 137                 SONAMEFLAG="-h "
 138                 if test "${GCC}" = "yes"; then
 139                         PICFLAG="-fPIC"
 140                         if test "${ac_cv_prog_gnu_ld}" = "yes"; then
 141                                 DYNEXP="-Wl,-E"
 142                         fi
 143                 else
 144                         PICFLAG="-KPIC"
 145                         ## ${CFLAGS} added for building 64-bit shared
 146                         ## libs using Sun's Compiler
 147                         LDSHFLAGS="-G \${CFLAGS}"
 148                         POBAD_CC=""
 149                         PICSUFFIX="po.o"
 150                 fi
 151                 AC_DEFINE(STAT_ST_BLOCKSIZE,512,[The size of a block])
 152                 ;;
 153         *sunos*) AC_DEFINE(SUNOS4,1,[Whether the host os is sunos4])
 154                 BLDSHARED="true"
 155                 LDSHFLAGS="-G"
 156                 SONAMEFLAG="-Wl,-h,"
 157                 PICFLAG="-KPIC"   # Is this correct for SunOS
 158                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 159                 ;;
 160         *netbsd* | *freebsd*)  BLDSHARED="true"
 161                 LDSHFLAGS="-shared"
 162                 DYNEXP="-Wl,--export-dynamic"
 163                 SONAMEFLAG="-Wl,-soname,"
 164                 PICFLAG="-fPIC -DPIC"
 165                 AC_DEFINE(STAT_ST_BLOCKSIZE,512,[The size of a block])
 166                 ;;
 167         *openbsd*)  BLDSHARED="true"
 168                 LDSHFLAGS="-shared"
 169                 DYNEXP="-Wl,-Bdynamic"
 170                 SONAMEFLAG="-Wl,-soname,"
 171                 PICFLAG="-fPIC"
 172                 AC_DEFINE(STAT_ST_BLOCKSIZE,512,[The size of a block])
 173                 ;;
 174         *irix*) AC_DEFINE(IRIX,1,[Whether the host os is irix])
 175                 ATTEMPT_WRAP32_BUILD=yes
 176                 BLDSHARED="true"
 177                 LDSHFLAGS="-set_version sgi1.0 -shared"
 178                 SONAMEFLAG="-soname "
 179                 SHLD="\${LD}"
 180                 if test "${GCC}" = "yes"; then
 181                         PICFLAG="-fPIC"
 182                 else
 183                         PICFLAG="-KPIC"
 184                 fi
 185                 AC_DEFINE(STAT_ST_BLOCKSIZE,512,[The size of a block])
 186                 ;;
 187         *aix*) AC_DEFINE(AIX,1,[Whether the host os is aix])
 188                 BLDSHARED="true"
 189                 LDSHFLAGS="-Wl,-bexpall,-bM:SRE,-bnoentry,-berok"
 190                 DYNEXP="-Wl,-brtl,-bexpall,-bbigtoc"
 191                 PICFLAG="-O2"
 192                 if test "${GCC}" != "yes"; then
 193                         ## for funky AIX compiler using strncpy()
 194                         CFLAGS="$CFLAGS -D_LINUX_SOURCE_COMPAT -qmaxmem=32000"
 195                 fi
 196
 197                 AC_DEFINE(STAT_ST_BLOCKSIZE,DEV_BSIZE,[The size of a block])
 198                 ;;
 199         *hpux*) AC_DEFINE(HPUX,1,[Whether the host os is HPUX])
 200                 SHLIBEXT="sl"
 201                 # Use special PIC flags for the native HP-UX compiler.
 202                 if test $ac_cv_prog_cc_Ae = yes; then
 203                         BLDSHARED="true"
 204                         SHLD="/usr/bin/ld"
 205                         LDSHFLAGS="-B symbolic -b -z"
 206                         SONAMEFLAG="+h "
 207                         PICFLAG="+z"
 208                 fi
 209                 DYNEXP="-Wl,-E"
 210                 AC_DEFINE(STAT_ST_BLOCKSIZE,8192,[The size of a block])
 211                 ;;
 212         *qnx*) AC_DEFINE(QNX,1,[Whether the host os is qnx])
 213                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 214                 ;;
 215         *osf*) AC_DEFINE(OSF1,1,[Whether the host os is osf1])
 216                 BLDSHARED="true"
 217                 LDSHFLAGS="-shared"
 218                 SONAMEFLAG="-Wl,-soname,"
 219                 PICFLAG="-fPIC"
 220                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 221                 ;;
 222         *sco*) AC_DEFINE(SCO,1,[Whether the host os is sco unix])
 223                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 224                 ;;
 225         *unixware*) AC_DEFINE(UNIXWARE,1,[Whether the host os is unixware])
 226                 BLDSHARED="true"
 227                 LDSHFLAGS="-shared"
 228                 SONAMEFLAG="-Wl,-soname,"
 229                 PICFLAG="-KPIC"
 230                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 231                 ;;
 232         *next2*) AC_DEFINE(NEXT2,1,[Whether the host os is NeXT v2])
 233                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 234                 ;;
 235         *dgux*) AC_CHECK_PROG( ROFF, groff, [groff -etpsR -Tascii -man])
 236                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 237                 ;;
 238         *sysv4*) AC_DEFINE(SYSV,1,[Whether this is a system V system])
 239                 case "$host" in
 240                         *-univel-*)     if [ test "$GCC" != yes ]; then
 241                                         AC_DEFINE(HAVE_MEMSET,1,[Whether memset() is available])
 242                                 fi
 243                                 LDSHFLAGS="-G"
 244                                         DYNEXP="-Bexport"
 245                         ;;
 246                         *mips-sni-sysv4*) AC_DEFINE(RELIANTUNIX,1,[Whether the host os is reliantunix]);;
 247                 esac
 248                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 249                 ;;
 250
 251         *sysv5*) AC_DEFINE(SYSV,1,[Whether this is a system V system])
 252                 if [ test "$GCC" != yes ]; then
 253                         AC_DEFINE(HAVE_MEMSET,1,[Whether memset() is available])
 254                 fi
 255                 LDSHFLAGS="-G"
 256                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 257                 ;;
 258         *-vms)
 259                 BLDMERGED="false"
 260                 BLDSHARED="false"
 261                 LDSHFLAGS=""
 262                 ;;
 263         *vos*) AC_DEFINE(STAT_ST_BLOCKSIZE,4096)
 264                 BLDSHARED="false"
 265                 BLDMERGED="false"
 266                 LDSHFLAGS=""
 267                 ;;
 268         *)
 269                 AC_DEFINE(STAT_ST_BLOCKSIZE,512)
 270                 ;;
 271 esac
 272 AC_MSG_RESULT($BLDSHARED)
 273 AC_MSG_CHECKING([linker flags for shared libraries])
 274 AC_MSG_RESULT([$LDSHFLAGS])
 275 AC_MSG_CHECKING([compiler flags for position-independent code])
 276 AC_MSG_RESULT([$PICFLAGS])
 277
 278 #######################################################
 279 # test whether building a shared library actually works
 280 if test $BLDSHARED = true; then
 281 AC_CACHE_CHECK([whether building shared libraries actually works],
 282                [ac_cv_shlib_works],[
 283    ac_cv_shlib_works=no
 284    # try building a trivial shared library
 285    if test "$PICSUFFIX" = "po"; then
 286      $CC $CPPFLAGS $CFLAGS $PICFLAG -c -o shlib.po ${srcdir-.}/build/tests/shlib.c &&
 287        $CC $CPPFLAGS $CFLAGS `eval echo $LDSHFLAGS` -o shlib.so shlib.po &&
 288        ac_cv_shlib_works=yes
 289    else
 290      $CC $CPPFLAGS $CFLAGS $PICFLAG -c -o shlib.$PICSUFFIX ${srcdir-.}/build/tests/shlib.c &&
 291        mv shlib.$PICSUFFIX shlib.po &&
 292        $CC $CPPFLAGS $CFLAGS `eval echo $LDSHFLAGS` -o shlib.so shlib.po &&
 293        ac_cv_shlib_works=yes
 294    fi
 295    rm -f shlib.so shlib.po
 296 ])
 297 if test $ac_cv_shlib_works = no; then
 298    BLDSHARED=false
 299 fi
 300 fi
 301
 302 AC_CACHE_CHECK([if gettimeofday takes tz argument],samba_cv_HAVE_GETTIMEOFDAY_TZ,[
 303 AC_TRY_RUN([
 304 #include <sys/time.h>
 305 #include <unistd.h>
 306 main() { struct timeval tv; exit(gettimeofday(&tv, NULL));}],
 307            samba_cv_HAVE_GETTIMEOFDAY_TZ=yes,samba_cv_HAVE_GETTIMEOFDAY_TZ=no,samba_cv_HAVE_GETTIMEOFDAY_TZ=cross)])
 308 if test x"$samba_cv_HAVE_GETTIMEOFDAY_TZ" = x"yes"; then
 309     AC_DEFINE(HAVE_GETTIMEOFDAY_TZ,1,[Whether gettimeofday() is available])
 310 fi
 311
 312
 313 AC_CACHE_CHECK([for utimbuf],samba_cv_HAVE_UTIMBUF,[
 314 AC_TRY_COMPILE([#include <sys/types.h>
 315 #include <utime.h>],
 316 [struct utimbuf tbuf;  tbuf.actime = 0; tbuf.modtime = 1; exit(utime("foo.c",&tbuf));],
 317 samba_cv_HAVE_UTIMBUF=yes,samba_cv_HAVE_UTIMBUF=no,samba_cv_HAVE_UTIMBUF=cross)])
 318 if test x"$samba_cv_HAVE_UTIMBUF" = x"yes"; then
 319     AC_DEFINE(HAVE_UTIMBUF,1,[Whether struct utimbuf is available])
 320 fi
 321
 322 AC_CACHE_CHECK([for Linux kernel oplocks],samba_cv_HAVE_KERNEL_OPLOCKS_LINUX,[
 323 AC_TRY_RUN([
 324 #include <sys/types.h>
 325 #include <fcntl.h>
 326 #ifndef F_GETLEASE
 327 #define F_GETLEASE      1025
 328 #endif
 329 main() {
 330        int fd = open("/dev/null", O_RDONLY);
 331        return fcntl(fd, F_GETLEASE, 0) == -1;
 332 }
 333 ],
 334 samba_cv_HAVE_KERNEL_OPLOCKS_LINUX=yes,samba_cv_HAVE_KERNEL_OPLOCKS_LINUX=no,samba_cv_HAVE_KERNEL_OPLOCKS_LINUX=cross)])
 335 if test x"$samba_cv_HAVE_KERNEL_OPLOCKS_LINUX" = x"yes"; then
 336     AC_DEFINE(HAVE_KERNEL_OPLOCKS_LINUX,1,[Whether to use linux kernel oplocks])
 337 fi
 338
 339 AC_CACHE_CHECK([for kernel change notify support],samba_cv_HAVE_KERNEL_CHANGE_NOTIFY,[
 340 AC_TRY_RUN([
 341 #include <sys/types.h>
 342 #include <fcntl.h>
 343 #include <signal.h>
 344 #ifndef F_NOTIFY
 345 #define F_NOTIFY 1026
 346 #endif
 347 main() {
 348         exit(fcntl(open("/tmp", O_RDONLY), F_NOTIFY, 0) == -1 ?  1 : 0);
 349 }
 350 ],
 351 samba_cv_HAVE_KERNEL_CHANGE_NOTIFY=yes,samba_cv_HAVE_KERNEL_CHANGE_NOTIFY=no,samba_cv_HAVE_KERNEL_CHANGE_NOTIFY=cross)])
 352 if test x"$samba_cv_HAVE_KERNEL_CHANGE_NOTIFY" = x"yes"; then
 353     AC_DEFINE(HAVE_KERNEL_CHANGE_NOTIFY,1,[Whether kernel notifies changes])
 354 fi
 355
 356 AC_CACHE_CHECK([for kernel share modes],samba_cv_HAVE_KERNEL_SHARE_MODES,[
 357 AC_TRY_RUN([
 358 #include <sys/types.h>
 359 #include <fcntl.h>
 360 #include <signal.h>
 361 #include <sys/file.h>
 362 #ifndef LOCK_MAND
 363 #define LOCK_MAND       32
 364 #define LOCK_READ       64
 365 #endif
 366 main() {
 367         exit(flock(open("/dev/null", O_RDWR), LOCK_MAND|LOCK_READ) != 0);
 368 }
 369 ],
 370 samba_cv_HAVE_KERNEL_SHARE_MODES=yes,samba_cv_HAVE_KERNEL_SHARE_MODES=no,samba_cv_HAVE_KERNEL_SHARE_MODES=cross)])
 371 if test x"$samba_cv_HAVE_KERNEL_SHARE_MODES" = x"yes"; then
 372     AC_DEFINE(HAVE_KERNEL_SHARE_MODES,1,[Whether the kernel supports share modes])
 373 fi
 374
 375 AC_CACHE_CHECK([for IRIX kernel oplock type definitions],samba_cv_HAVE_KERNEL_OPLOCKS_IRIX,[
 376 AC_TRY_COMPILE([#include <sys/types.h>
 377 #include <fcntl.h>],
 378 [oplock_stat_t t; t.os_state = OP_REVOKE; t.os_dev = 1; t.os_ino = 1;],
 379 samba_cv_HAVE_KERNEL_OPLOCKS_IRIX=yes,samba_cv_HAVE_KERNEL_OPLOCKS_IRIX=no)])
 380 if test x"$samba_cv_HAVE_KERNEL_OPLOCKS_IRIX" = x"yes"; then
 381     AC_DEFINE(HAVE_KERNEL_OPLOCKS_IRIX,1,[Whether IRIX kernel oplock type definitions are available])
 382 fi
 383
 384
 385 AC_CACHE_CHECK([for ftruncate extend],samba_cv_HAVE_FTRUNCATE_EXTEND,[
 386 AC_TRY_RUN([#include "${srcdir-.}/build/tests/ftruncate.c"],
 387            samba_cv_HAVE_FTRUNCATE_EXTEND=yes,samba_cv_HAVE_FTRUNCATE_EXTEND=no,samba_cv_HAVE_FTRUNCATE_EXTEND=cross)])
 388 if test x"$samba_cv_HAVE_FTRUNCATE_EXTEND" = x"yes"; then
 389     AC_DEFINE(HAVE_FTRUNCATE_EXTEND,1,[Truncate extend])
 390 fi
 391
 392 AC_CACHE_CHECK([for sysconf(_SC_NGROUPS_MAX)],samba_cv_SYSCONF_SC_NGROUPS_MAX,[
 393 AC_TRY_RUN([#include <unistd.h>
 394 main() { exit(sysconf(_SC_NGROUPS_MAX) == -1 ? 1 : 0); }],
 395 samba_cv_SYSCONF_SC_NGROUPS_MAX=yes,samba_cv_SYSCONF_SC_NGROUPS_MAX=no,samba_cv_SYSCONF_SC_NGROUPS_MAX=cross)])
 396 if test x"$samba_cv_SYSCONF_SC_NGROUPS_MAX" = x"yes"; then
 397     AC_DEFINE(SYSCONF_SC_NGROUPS_MAX,1,[Whether sysconf(_SC_NGROUPS_MAX) is available])
 398 fi
 399
 400 AC_CACHE_CHECK([for working mmap],samba_cv_HAVE_MMAP,[
 401 AC_TRY_RUN([#include "${srcdir-.}/build/tests/shared_mmap.c"],
 402            samba_cv_HAVE_MMAP=yes,samba_cv_HAVE_MMAP=no,samba_cv_HAVE_MMAP=cross)])
 403 if test x"$samba_cv_HAVE_MMAP" = x"yes"; then
 404     AC_DEFINE(HAVE_MMAP,1,[Whether mmap works])
 405 fi
 406
 407 AC_CACHE_CHECK([for st_blocks in struct stat],samba_cv_HAVE_STAT_ST_BLOCKS,[
 408 AC_TRY_COMPILE([#include <sys/types.h>
 409 #include <sys/stat.h>
 410 #include <unistd.h>],
 411 [struct stat st;  st.st_blocks = 0;],
 412 samba_cv_HAVE_STAT_ST_BLOCKS=yes,samba_cv_HAVE_STAT_ST_BLOCKS=no,samba_cv_HAVE_STAT_ST_BLOCKS=cross)])
 413 if test x"$samba_cv_HAVE_STAT_ST_BLOCKS" = x"yes"; then
 414     AC_DEFINE(HAVE_STAT_ST_BLOCKS,1,[Whether the stat struct has a st_block property])
 415 fi
 416
 417 AC_CACHE_CHECK([for st_blksize in struct stat],samba_cv_HAVE_STAT_ST_BLKSIZE,[
 418 AC_TRY_COMPILE([#include <sys/types.h>
 419 #include <sys/stat.h>
 420 #include <unistd.h>],
 421 [struct stat st;  st.st_blksize = 0;],
 422 samba_cv_HAVE_STAT_ST_BLKSIZE=yes,samba_cv_HAVE_STAT_ST_BLKSIZE=no,samba_cv_HAVE_STAT_ST_BLKSIZE=cross)])
 423 if test x"$samba_cv_HAVE_STAT_ST_BLKSIZE" = x"yes"; then
 424     AC_DEFINE(HAVE_STAT_ST_BLKSIZE,1,[Whether the stat struct has a st_blksize property])
 425 fi
 426
 427 case "$host_os" in
 428 *linux*)
 429 AC_CACHE_CHECK([for broken RedHat 7.2 system header files],samba_cv_BROKEN_REDHAT_7_SYSTEM_HEADERS,[
 430 AC_TRY_COMPILE([
 431 #ifdef HAVE_SYS_VFS_H
 432 #include <sys/vfs.h>
 433 #endif
 434 #ifdef HAVE_SYS_CAPABILITY_H
 435 #include <sys/capability.h>
 436 #endif
 437 ],[int i;],
 438    samba_cv_BROKEN_REDHAT_7_SYSTEM_HEADERS=no,samba_cv_BROKEN_REDHAT_7_SYSTEM_HEADERS=yes)])
 439 if test x"$samba_cv_BROKEN_REDHAT_7_SYSTEM_HEADERS" = x"yes"; then
 440    AC_DEFINE(BROKEN_REDHAT_7_SYSTEM_HEADERS,1,[Broken RedHat 7.2 system header files])
 441 fi
 442 ;;
 443 esac
 444
 445 AC_CACHE_CHECK([for O_DIRECT flag to open(2)],samba_cv_HAVE_OPEN_O_DIRECT,[
 446 AC_TRY_COMPILE([
 447 #include <unistd.h>
 448 #ifdef HAVE_FCNTL_H
 449 #include <fcntl.h>
 450 #endif],
 451 [int fd = open("/dev/null", O_DIRECT);],
 452 samba_cv_HAVE_OPEN_O_DIRECT=yes,samba_cv_HAVE_OPEN_O_DIRECT=no)])
 453 if test x"$samba_cv_HAVE_OPEN_O_DIRECT" = x"yes"; then
 454     AC_DEFINE(HAVE_OPEN_O_DIRECT,1,[Whether the open(2) accepts O_DIRECT])
 455 fi