Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1 | dnl ### A macro to find the include directory, useful for cross-compiling. |
| 2 | AC_DEFUN(AC_INCLUDEDIR, |
| 3 | [AC_REQUIRE([AC_PROG_AWK])dnl |
| 4 | AC_SUBST(includedir) |
| 5 | AC_MSG_CHECKING(for primary include directory) |
| 6 | includedir=/usr/include |
| 7 | if test -n "$GCC" |
| 8 | then |
| 9 | >conftest.c |
| 10 | new_includedir=` |
| 11 | $CC -v -E conftest.c 2>&1 | $AWK ' |
| 12 | /^End of search list/ { print last; exit } |
| 13 | { last = [$]1 } |
| 14 | ' |
| 15 | ` |
| 16 | rm -f conftest.c |
| 17 | if test -n "$new_includedir" && test -d "$new_includedir" |
| 18 | then |
| 19 | includedir=$new_includedir |
| 20 | fi |
| 21 | fi |
| 22 | AC_MSG_RESULT($includedir) |
| 23 | ]) |
| 24 | |
| 25 | dnl ### A macro to automatically set different CC and HOSTCC if using gcc. |
| 26 | define(AC_PROG_HOSTCC, |
| 27 | [AC_SUBST(HOSTCC)dnl |
| 28 | if test -z "$HOSTCC" |
| 29 | then |
| 30 | HOSTCC="$CC" |
| 31 | if test -n "$GCC" |
| 32 | then |
| 33 | # Find out if gcc groks our host. |
| 34 | worked= |
| 35 | last= |
| 36 | for i in $1 |
| 37 | do |
| 38 | test "x$i" = "x$last" && continue |
| 39 | last="$i" |
| 40 | CC="$HOSTCC -b $i" |
| 41 | AC_MSG_CHECKING([for working $CC]) |
| 42 | AC_TRY_LINK(,, |
| 43 | worked=1 |
| 44 | break |
| 45 | ) |
| 46 | AC_MSG_RESULT(no) |
| 47 | done |
| 48 | if test -z "$worked" |
| 49 | then |
| 50 | CC="$HOSTCC" |
| 51 | else |
| 52 | AC_MSG_RESULT(yes) |
| 53 | fi |
| 54 | fi |
| 55 | fi |
| 56 | ]) |
| 57 | |
| 58 | dnl ### A macro to set gcc warning flags. |
| 59 | define(AC_WARNFLAGS, |
| 60 | [AC_SUBST(WARNFLAGS) |
| 61 | if test -z "$WARNFLAGS" |
| 62 | then |
| 63 | if test -n "$GCC" |
| 64 | then |
| 65 | # If we're using gcc we want warning flags. |
| 66 | WARNFLAGS=-Wall |
| 67 | fi |
| 68 | fi |
| 69 | ]) |
| 70 | |
| 71 | dnl ### A macro to determine if procfs is pollable. |
| 72 | AC_DEFUN(AC_POLLABLE_PROCFS, |
| 73 | [AC_MSG_CHECKING(for pollable procfs) |
| 74 | AC_CACHE_VAL(ac_cv_pollable_procfs, |
| 75 | [AC_TRY_RUN([ |
| 76 | #include <stdio.h> |
| 77 | #include <signal.h> |
| 78 | #include <sys/procfs.h> |
| 79 | #include <sys/stropts.h> |
| 80 | #include <poll.h> |
| 81 | |
| 82 | main() |
| 83 | { |
| 84 | int pid; |
| 85 | char proc[32]; |
| 86 | FILE *pfp; |
| 87 | struct pollfd pfd; |
| 88 | |
| 89 | if ((pid = fork()) == 0) { |
| 90 | pause(); |
| 91 | exit(0); |
| 92 | } |
| 93 | sprintf(proc, "/proc/%d", pid); |
| 94 | if ((pfp = fopen(proc, "r+")) == NULL) |
| 95 | goto fail; |
| 96 | if (ioctl(fileno(pfp), PIOCSTOP, NULL) < 0) |
| 97 | goto fail; |
| 98 | pfd.fd = fileno(pfp); |
| 99 | pfd.events = POLLPRI; |
| 100 | if (poll(&pfd, 1, 0) < 0) |
| 101 | goto fail; |
| 102 | if (!(pfd.revents & POLLPRI)) |
| 103 | goto fail; |
| 104 | kill(pid, SIGKILL); |
| 105 | exit(0); |
| 106 | fail: |
| 107 | kill(pid, SIGKILL); |
| 108 | exit(1); |
| 109 | } |
| 110 | ], |
| 111 | ac_cv_pollable_procfs=yes, |
| 112 | ac_cv_pollable_procfs=no, |
| 113 | [ |
| 114 | # Guess or punt. |
| 115 | case "$host_os" in |
| 116 | solaris2*|irix5*) |
| 117 | ac_cv_pollable_procfs=yes |
| 118 | ;; |
| 119 | *) |
| 120 | ac_cv_pollable_procfs=no |
| 121 | ;; |
| 122 | esac |
| 123 | ])]) |
| 124 | AC_MSG_RESULT($ac_cv_pollable_procfs) |
| 125 | if test "$ac_cv_pollable_procfs" = yes |
| 126 | then |
| 127 | AC_DEFINE(HAVE_POLLABLE_PROCFS) |
| 128 | fi |
| 129 | ]) |
| 130 | |
| 131 | dnl ### A macro to determine if the prstatus structure has a pr_syscall member. |
| 132 | AC_DEFUN(AC_STRUCT_PR_SYSCALL, |
| 133 | [AC_MSG_CHECKING(for pr_syscall in struct prstatus) |
| 134 | AC_CACHE_VAL(ac_cv_struct_pr_syscall, |
| 135 | [AC_TRY_COMPILE([#include <sys/procfs.h>], |
| 136 | [struct prstatus s; s.pr_syscall;], |
| 137 | ac_cv_struct_pr_syscall=yes, |
| 138 | ac_cv_struct_pr_syscall=no)]) |
| 139 | AC_MSG_RESULT($ac_cv_struct_pr_syscall) |
| 140 | if test "$ac_cv_struct_pr_syscall" = yes |
| 141 | then |
| 142 | AC_DEFINE(HAVE_PR_SYSCALL) |
| 143 | fi |
| 144 | ]) |
| 145 | |
| 146 | dnl ### A macro to detect the presence of the sig_atomic_t in signal.h |
| 147 | AC_DEFUN(AC_SIG_ATOMIC_T, |
| 148 | [AC_MSG_CHECKING(for sig_atomic_t in signal.h) |
| 149 | AC_CACHE_VAL(ac_cv_sig_atomic_t, |
| 150 | [AC_TRY_COMPILE([#include <signal.h>], |
| 151 | [sig_atomic_t x;], |
| 152 | ac_cv_sig_atomic_t=yes, |
| 153 | ac_cv_sig_atomic_t=no)]) |
| 154 | AC_MSG_RESULT($ac_cv_sig_atomic_t) |
| 155 | if test "$ac_cv_sig_atomic_t" = yes |
| 156 | then |
| 157 | AC_DEFINE(HAVE_SIG_ATOMIC_T) |
| 158 | fi |
| 159 | ]) |
| 160 | |
| 161 | dnl ### A macro to determine if sys_errlist is declared. |
| 162 | AC_DEFUN(AC_DECL_SYS_ERRLIST, |
| 163 | [AC_MSG_CHECKING([for sys_errlist declaration]) |
| 164 | AC_CACHE_VAL(ac_cv_decl_sys_errlist, |
| 165 | [AC_TRY_COMPILE([#include <sys/types.h> |
| 166 | #include <errno.h> |
| 167 | #include <stdio.h> |
| 168 | /* Somebody might declare sys_errlist in unistd.h. */ |
| 169 | #ifdef HAVE_UNISTD_H |
| 170 | #include <unistd.h> |
| 171 | #endif], [char *msg = *(sys_errlist + 1);], |
| 172 | ac_cv_decl_sys_errlist=yes, ac_cv_decl_sys_errlist=no)])dnl |
| 173 | AC_MSG_RESULT($ac_cv_decl_sys_errlist) |
| 174 | if test $ac_cv_decl_sys_errlist = yes; then |
| 175 | AC_DEFINE(SYS_ERRLIST_DECLARED) |
| 176 | fi |
| 177 | ]) |
| 178 | |
| 179 | dnl ### A macro to determine if _sys_siglist is declared. |
| 180 | AC_DEFUN(AC_DECL__SYS_SIGLIST, |
| 181 | [AC_MSG_CHECKING([for _sys_siglist declaration]) |
| 182 | AC_CACHE_VAL(ac_cv_decl__sys_siglist, |
| 183 | [AC_TRY_COMPILE([#include <sys/types.h> |
| 184 | #include <signal.h> |
| 185 | /* Somebody might declare _sys_siglist in unistd.h. */ |
| 186 | #ifdef HAVE_UNISTD_H |
| 187 | #include <unistd.h> |
| 188 | #endif], [char *msg = *(_sys_siglist + 1);], |
| 189 | ac_cv_decl__sys_siglist=yes, ac_cv_decl__sys_siglist=no)])dnl |
| 190 | AC_MSG_RESULT($ac_cv_decl__sys_siglist) |
| 191 | if test $ac_cv_decl__sys_siglist = yes; then |
| 192 | AC_DEFINE(SYS_SIGLIST_DECLARED) |
| 193 | fi |
| 194 | ]) |
| 195 | |
| 196 | dnl ### A macro to determine if the msghdr structure has a msg_control member. |
| 197 | AC_DEFUN(AC_STRUCT_MSG_CONTROL, |
| 198 | [AC_MSG_CHECKING(for msg_control in struct msghdr) |
| 199 | AC_CACHE_VAL(ac_cv_struct_msg_control, |
| 200 | [AC_TRY_COMPILE([#include <sys/types.h> |
| 201 | #include <sys/socket.h>], |
| 202 | [#undef msg_control |
| 203 | struct msghdr m; m.msg_control;], |
| 204 | ac_cv_struct_msg_control=yes, |
| 205 | ac_cv_struct_msg_control=no)]) |
| 206 | AC_MSG_RESULT($ac_cv_struct_msg_control) |
| 207 | if test "$ac_cv_struct_msg_control" = yes |
| 208 | then |
| 209 | AC_DEFINE(HAVE_MSG_CONTROL) |
| 210 | fi |
| 211 | ]) |