|
| 1 | +dnl |
| 2 | +dnl This file contains macros used in configure.ac. |
| 3 | +dnl automake uses this file to generate aclocal.m4, which is used by autoconf. |
| 4 | +dnl |
| 5 | + |
| 6 | +dnl ### A macro to find the include directory, useful for cross-compiling. |
| 7 | +AC_DEFUN(AC_INCLUDEDIR, |
| 8 | +[AC_REQUIRE([AC_PROG_AWK])dnl |
| 9 | +AC_SUBST(includedir) |
| 10 | +AC_MSG_CHECKING(for primary include directory) |
| 11 | +includedir=/usr/include |
| 12 | +if test -n "$GCC" |
| 13 | +then |
| 14 | + >conftest.c |
| 15 | + new_includedir=` |
| 16 | + $CC -v -E conftest.c 2>&1 | $AWK ' |
| 17 | + /^End of search list/ { print last; exit } |
| 18 | + { last = [$]1 } |
| 19 | + ' |
| 20 | + ` |
| 21 | + rm -f conftest.c |
| 22 | + if test -n "$new_includedir" && test -d "$new_includedir" |
| 23 | + then |
| 24 | + includedir=$new_includedir |
| 25 | + fi |
| 26 | +fi |
| 27 | +AC_MSG_RESULT($includedir) |
| 28 | +]) |
| 29 | + |
| 30 | +dnl ### A macro to set gcc warning flags. |
| 31 | +define(AC_WARNFLAGS, |
| 32 | +[AC_SUBST(WARNFLAGS) |
| 33 | +if test -z "$WARNFLAGS" |
| 34 | +then |
| 35 | + if test -n "$GCC" |
| 36 | + then |
| 37 | + # If we're using gcc we want warning flags. |
| 38 | + WARNFLAGS=-Wall |
| 39 | + fi |
| 40 | +fi |
| 41 | +]) |
| 42 | + |
| 43 | +dnl ### A macro to determine if we have a "MP" type procfs |
| 44 | +AC_DEFUN(AC_MP_PROCFS, |
| 45 | +[AC_MSG_CHECKING(for MP procfs) |
| 46 | +AC_CACHE_VAL(ac_cv_mp_procfs, |
| 47 | +[AC_RUN_IFELSE([AC_LANG_SOURCE([[ |
| 48 | +#include <stdio.h> |
| 49 | +#include <signal.h> |
| 50 | +#include <sys/procfs.h> |
| 51 | +
|
| 52 | +main() |
| 53 | +{ |
| 54 | + int pid; |
| 55 | + char proc[32]; |
| 56 | + FILE *ctl; |
| 57 | + FILE *status; |
| 58 | + int cmd; |
| 59 | + struct pstatus pstatus; |
| 60 | +
|
| 61 | + if ((pid = fork()) == 0) { |
| 62 | + pause(); |
| 63 | + exit(0); |
| 64 | + } |
| 65 | + sprintf(proc, "/proc/%d/ctl", pid); |
| 66 | + if ((ctl = fopen(proc, "w")) == NULL) |
| 67 | + goto fail; |
| 68 | + sprintf(proc, "/proc/%d/status", pid); |
| 69 | + if ((status = fopen (proc, "r")) == NULL) |
| 70 | + goto fail; |
| 71 | + cmd = PCSTOP; |
| 72 | + if (write (fileno (ctl), &cmd, sizeof cmd) < 0) |
| 73 | + goto fail; |
| 74 | + if (read (fileno (status), &pstatus, sizeof pstatus) < 0) |
| 75 | + goto fail; |
| 76 | + kill(pid, SIGKILL); |
| 77 | + exit(0); |
| 78 | +fail: |
| 79 | + kill(pid, SIGKILL); |
| 80 | + exit(1); |
| 81 | +} |
| 82 | +]])],[ac_cv_mp_procfs=yes],[ac_cv_mp_procfs=no],[ |
| 83 | +# Guess or punt. |
| 84 | +case "$host_os" in |
| 85 | +svr4.2*|svr5*) |
| 86 | + ac_cv_mp_procfs=yes |
| 87 | + ;; |
| 88 | +*) |
| 89 | + ac_cv_mp_procfs=no |
| 90 | + ;; |
| 91 | +esac |
| 92 | +])]) |
| 93 | +AC_MSG_RESULT($ac_cv_mp_procfs) |
| 94 | +if test "$ac_cv_mp_procfs" = yes |
| 95 | +then |
| 96 | + AC_DEFINE([HAVE_MP_PROCFS], 1, |
| 97 | +[Define if you have a SVR4 MP type procfs. |
| 98 | +I.E. /dev/xxx/ctl, /dev/xxx/status. |
| 99 | +Also implies that you have the pr_lwp member in prstatus.]) |
| 100 | +fi |
| 101 | +]) |
| 102 | + |
| 103 | +dnl ### A macro to determine if procfs is pollable. |
| 104 | +AC_DEFUN(AC_POLLABLE_PROCFS, |
| 105 | +[AC_MSG_CHECKING(for pollable procfs) |
| 106 | +AC_CACHE_VAL(ac_cv_pollable_procfs, |
| 107 | +[AC_RUN_IFELSE([AC_LANG_SOURCE([[ |
| 108 | +#include <stdio.h> |
| 109 | +#include <signal.h> |
| 110 | +#include <sys/procfs.h> |
| 111 | +#include <sys/stropts.h> |
| 112 | +#include <poll.h> |
| 113 | +
|
| 114 | +#ifdef HAVE_MP_PROCFS |
| 115 | +#define PIOCSTOP PCSTOP |
| 116 | +#define POLLWANT POLLWRNORM |
| 117 | +#define PROC "/proc/%d/ctl" |
| 118 | +#define PROC_MODE "w" |
| 119 | +int IOCTL (int fd, int cmd, int arg) { |
| 120 | + return write (fd, &cmd, sizeof cmd); |
| 121 | +} |
| 122 | +#else |
| 123 | +#define POLLWANT POLLPRI |
| 124 | +#define PROC "/proc/%d" |
| 125 | +#define PROC_MODE "r+" |
| 126 | +#define IOCTL ioctl |
| 127 | +#endif |
| 128 | +
|
| 129 | +main() |
| 130 | +{ |
| 131 | + int pid; |
| 132 | + char proc[32]; |
| 133 | + FILE *pfp; |
| 134 | + struct pollfd pfd; |
| 135 | +
|
| 136 | + if ((pid = fork()) == 0) { |
| 137 | + pause(); |
| 138 | + exit(0); |
| 139 | + } |
| 140 | + sprintf(proc, PROC, pid); |
| 141 | + if ((pfp = fopen(proc, PROC_MODE)) == NULL) |
| 142 | + goto fail; |
| 143 | + if (IOCTL(fileno(pfp), PIOCSTOP, NULL) < 0) |
| 144 | + goto fail; |
| 145 | + pfd.fd = fileno(pfp); |
| 146 | + pfd.events = POLLWANT; |
| 147 | + if (poll(&pfd, 1, 0) < 0) |
| 148 | + goto fail; |
| 149 | + if (!(pfd.revents & POLLWANT)) |
| 150 | + goto fail; |
| 151 | + kill(pid, SIGKILL); |
| 152 | + exit(0); |
| 153 | +fail: |
| 154 | + kill(pid, SIGKILL); |
| 155 | + exit(1); |
| 156 | +} |
| 157 | +]])],[ac_cv_pollable_procfs=yes],[ac_cv_pollable_procfs=no],[ |
| 158 | +# Guess or punt. |
| 159 | +case "$host_os" in |
| 160 | +solaris2*|irix5*|svr4.2uw*|svr5*) |
| 161 | + ac_cv_pollable_procfs=yes |
| 162 | + ;; |
| 163 | +*) |
| 164 | + ac_cv_pollable_procfs=no |
| 165 | + ;; |
| 166 | +esac |
| 167 | +])]) |
| 168 | +AC_MSG_RESULT($ac_cv_pollable_procfs) |
| 169 | +if test "$ac_cv_pollable_procfs" = yes |
| 170 | +then |
| 171 | + AC_DEFINE([HAVE_POLLABLE_PROCFS], 1, |
| 172 | +[Define if you have SVR4 and the poll system call works on /proc files.]) |
| 173 | +fi |
| 174 | +]) |
| 175 | + |
| 176 | +dnl ### A macro to determine if the prstatus structure has a pr_syscall member. |
| 177 | +AC_DEFUN(AC_STRUCT_PR_SYSCALL, |
| 178 | +[AC_MSG_CHECKING(for pr_syscall in struct prstatus) |
| 179 | +AC_CACHE_VAL(ac_cv_struct_pr_syscall, |
| 180 | +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/procfs.h>]], [[#ifdef HAVE_MP_PROCFS |
| 181 | +pstatus_t s; |
| 182 | +s.pr_lwp.pr_syscall |
| 183 | +#else |
| 184 | +prstatus_t s; |
| 185 | +s.pr_syscall |
| 186 | +#endif]])],[ac_cv_struct_pr_syscall=yes],[ac_cv_struct_pr_syscall=no])]) |
| 187 | +AC_MSG_RESULT($ac_cv_struct_pr_syscall) |
| 188 | +if test "$ac_cv_struct_pr_syscall" = yes |
| 189 | +then |
| 190 | + AC_DEFINE([HAVE_PR_SYSCALL], 1, |
| 191 | +[Define if the prstatus structure in sys/procfs.h has a pr_syscall member.]) |
| 192 | +fi |
| 193 | +]) |
| 194 | + |
| 195 | +dnl ### A macro to determine whether stat64 is defined. |
| 196 | +AC_DEFUN(AC_STAT64, |
| 197 | +[AC_MSG_CHECKING(for stat64 in (asm|sys)/stat.h) |
| 198 | +AC_CACHE_VAL(ac_cv_type_stat64, |
| 199 | +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#ifdef LINUX |
| 200 | +#include <linux/types.h> |
| 201 | +#include <asm/stat.h> |
| 202 | +#else |
| 203 | +#include <sys/stat.h> |
| 204 | +#endif]], [[struct stat64 st;]])],[ac_cv_type_stat64=yes],[ac_cv_type_stat64=no])]) |
| 205 | +AC_MSG_RESULT($ac_cv_type_stat64) |
| 206 | +if test "$ac_cv_type_stat64" = yes |
| 207 | +then |
| 208 | + AC_DEFINE([HAVE_STAT64], 1, |
| 209 | +[Define if stat64 is available in asm/stat.h.]) |
| 210 | +fi |
| 211 | +]) |
| 212 | + |
| 213 | +dnl ### A macro to determine if off_t is a long long |
| 214 | +AC_DEFUN(AC_OFF_T_IS_LONG_LONG, |
| 215 | +[AC_MSG_CHECKING(for long long off_t) |
| 216 | +AC_CACHE_VAL(ac_cv_have_long_long_off_t, |
| 217 | +[AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <sys/types.h> |
| 218 | +main () { |
| 219 | + if (sizeof (off_t) == sizeof (long long) && |
| 220 | + sizeof (off_t) > sizeof (long)) |
| 221 | + return 0; |
| 222 | + return 1; |
| 223 | +} |
| 224 | +]])],[ac_cv_have_long_long_off_t=yes],[ac_cv_have_long_long_off_t=no],[# Should try to guess here |
| 225 | +ac_cv_have_long_long_off_t=no |
| 226 | +])]) |
| 227 | +AC_MSG_RESULT($ac_cv_have_long_long_off_t) |
| 228 | +if test "$ac_cv_have_long_long_off_t" = yes |
| 229 | +then |
| 230 | + AC_DEFINE([HAVE_LONG_LONG_OFF_T], 1, [Define if off_t is a long long.]) |
| 231 | +fi |
| 232 | +]) |
| 233 | + |
| 234 | +dnl ### A macro to determine if rlim_t is a long long |
| 235 | +AC_DEFUN(AC_RLIM_T_IS_LONG_LONG, |
| 236 | +[AC_MSG_CHECKING(for long long rlim_t) |
| 237 | +AC_CACHE_VAL(ac_cv_have_long_long_rlim_t, |
| 238 | +[AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <sys/types.h> |
| 239 | +#include <sys/time.h> |
| 240 | +#include <sys/resource.h> |
| 241 | +main () { |
| 242 | + if (sizeof (rlim_t) == sizeof (long long) && |
| 243 | + sizeof (rlim_t) > sizeof (long)) |
| 244 | + return 0; |
| 245 | + return 1; |
| 246 | +} |
| 247 | +]])],[ac_cv_have_long_long_rlim_t=yes],[ac_cv_have_long_long_rlim_t=no],[# Should try to guess here |
| 248 | +ac_cv_have_long_long_rlim_t=no |
| 249 | +])]) |
| 250 | +AC_MSG_RESULT($ac_cv_have_long_long_rlim_t) |
| 251 | +if test "$ac_cv_have_long_long_rlim_t" = yes |
| 252 | +then |
| 253 | + AC_DEFINE([HAVE_LONG_LONG_RLIM_T], 1, [Define if rlim_t is a long long.]) |
| 254 | +fi |
| 255 | +]) |
| 256 | + |
| 257 | +dnl ### A macro to determine endianness of long long |
| 258 | +AC_DEFUN(AC_LITTLE_ENDIAN_LONG_LONG, |
| 259 | +[AC_MSG_CHECKING(for little endian long long) |
| 260 | +AC_CACHE_VAL(ac_cv_have_little_endian_long_long, |
| 261 | +[AC_RUN_IFELSE([AC_LANG_SOURCE([[ |
| 262 | +int main () { |
| 263 | + union { |
| 264 | + long long ll; |
| 265 | + long l [2]; |
| 266 | + } u; |
| 267 | + u.ll = 0x12345678; |
| 268 | + if (u.l[0] == 0x12345678) |
| 269 | + return 0; |
| 270 | + return 1; |
| 271 | +} |
| 272 | +]])],[ac_cv_have_little_endian_long_long=yes],[ac_cv_have_little_endian_long_long=no],[# Should try to guess here |
| 273 | +ac_cv_have_little_endian_long_long=no |
| 274 | +])]) |
| 275 | +AC_MSG_RESULT($ac_cv_have_little_endian_long_long) |
| 276 | +if test "$ac_cv_have_little_endian_long_long" = yes |
| 277 | +then |
| 278 | + AC_DEFINE([HAVE_LITTLE_ENDIAN_LONG_LONG], 1, |
| 279 | +[Define if long long is little-endian.]) |
| 280 | +fi |
| 281 | +]) |
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