| dnl ### A macro to find the include directory, useful for cross-compiling. |
| AC_DEFUN(AC_INCLUDEDIR, |
| [AC_REQUIRE([AC_PROG_AWK])dnl |
| AC_SUBST(includedir) |
| AC_MSG_CHECKING(for primary include directory) |
| includedir=/usr/include |
| if test -n "$GCC" |
| then |
| >conftest.c |
| new_includedir=` |
| $CC -v -E conftest.c 2>&1 | $AWK ' |
| /^End of search list/ { print last; exit } |
| { last = [$]1 } |
| ' |
| ` |
| rm -f conftest.c |
| if test -n "$new_includedir" && test -d "$new_includedir" |
| then |
| includedir=$new_includedir |
| fi |
| fi |
| AC_MSG_RESULT($includedir) |
| ]) |
| |
| dnl ### A macro to automatically set different CC and HOSTCC if using gcc. |
| define(AC_PROG_HOSTCC, |
| [AC_SUBST(HOSTCC)dnl |
| if test -z "$HOSTCC" |
| then |
| HOSTCC="$CC" |
| if test -n "$GCC" |
| then |
| # Find out if gcc groks our host. |
| worked= |
| last= |
| for i in $1 |
| do |
| test "x$i" = "x$last" && continue |
| last="$i" |
| CC="$HOSTCC -b $i" |
| AC_MSG_CHECKING([for working $CC]) |
| AC_TRY_LINK(,, |
| worked=1 |
| break |
| ) |
| AC_MSG_RESULT(no) |
| done |
| if test -z "$worked" |
| then |
| CC="$HOSTCC" |
| else |
| AC_MSG_RESULT(yes) |
| fi |
| fi |
| fi |
| ]) |
| |
| dnl ### A macro to set gcc warning flags. |
| define(AC_WARNFLAGS, |
| [AC_SUBST(WARNFLAGS) |
| if test -z "$WARNFLAGS" |
| then |
| if test -n "$GCC" |
| then |
| # If we're using gcc we want warning flags. |
| WARNFLAGS=-Wall |
| fi |
| fi |
| ]) |
| |
| dnl ### A macro to determine if we have a "MP" type procfs |
| AC_DEFUN(AC_MP_PROCFS, |
| [AC_MSG_CHECKING(for MP procfs) |
| AC_CACHE_VAL(ac_cv_mp_procfs, |
| [AC_TRY_RUN([ |
| #include <stdio.h> |
| #include <signal.h> |
| #include <sys/procfs.h> |
| |
| main() |
| { |
| int pid; |
| char proc[32]; |
| FILE *ctl; |
| FILE *status; |
| int cmd; |
| struct pstatus pstatus; |
| |
| if ((pid = fork()) == 0) { |
| pause(); |
| exit(0); |
| } |
| sprintf(proc, "/proc/%d/ctl", pid); |
| if ((ctl = fopen(proc, "w")) == NULL) |
| goto fail; |
| sprintf(proc, "/proc/%d/status", pid); |
| if ((status = fopen (proc, "r")) == NULL) |
| goto fail; |
| cmd = PCSTOP; |
| if (write (fileno (ctl), &cmd, sizeof cmd) < 0) |
| goto fail; |
| if (read (fileno (status), &pstatus, sizeof pstatus) < 0) |
| goto fail; |
| kill(pid, SIGKILL); |
| exit(0); |
| fail: |
| kill(pid, SIGKILL); |
| exit(1); |
| } |
| ], |
| ac_cv_mp_procfs=yes, |
| ac_cv_mp_procfs=no, |
| [ |
| # Guess or punt. |
| case "$host_os" in |
| svr4.2*|svr5*) |
| ac_cv_mp_procfs=yes |
| ;; |
| *) |
| ac_cv_mp_procfs=no |
| ;; |
| esac |
| ])]) |
| AC_MSG_RESULT($ac_cv_mp_procfs) |
| if test "$ac_cv_mp_procfs" = yes |
| then |
| AC_DEFINE(HAVE_MP_PROCFS) |
| fi |
| ]) |
| |
| dnl ### A macro to determine if procfs is pollable. |
| AC_DEFUN(AC_POLLABLE_PROCFS, |
| [AC_MSG_CHECKING(for pollable procfs) |
| AC_CACHE_VAL(ac_cv_pollable_procfs, |
| [AC_TRY_RUN([ |
| #include <stdio.h> |
| #include <signal.h> |
| #include <sys/procfs.h> |
| #include <sys/stropts.h> |
| #include <poll.h> |
| |
| #ifdef HAVE_MP_PROCFS |
| #define PIOCSTOP PCSTOP |
| #define POLLWANT POLLWRNORM |
| #define PROC "/proc/%d/ctl" |
| #define PROC_MODE "w" |
| int IOCTL (int fd, int cmd, int arg) { |
| return write (fd, &cmd, sizeof cmd); |
| } |
| #else |
| #define POLLWANT POLLPRI |
| #define PROC "/proc/%d" |
| #define PROC_MODE "r+" |
| #define IOCTL ioctl |
| #endif |
| |
| main() |
| { |
| int pid; |
| char proc[32]; |
| FILE *pfp; |
| struct pollfd pfd; |
| |
| if ((pid = fork()) == 0) { |
| pause(); |
| exit(0); |
| } |
| sprintf(proc, PROC, pid); |
| if ((pfp = fopen(proc, PROC_MODE)) == NULL) |
| goto fail; |
| if (IOCTL(fileno(pfp), PIOCSTOP, NULL) < 0) |
| goto fail; |
| pfd.fd = fileno(pfp); |
| pfd.events = POLLWANT; |
| if (poll(&pfd, 1, 0) < 0) |
| goto fail; |
| if (!(pfd.revents & POLLWANT)) |
| goto fail; |
| kill(pid, SIGKILL); |
| exit(0); |
| fail: |
| kill(pid, SIGKILL); |
| exit(1); |
| } |
| ], |
| ac_cv_pollable_procfs=yes, |
| ac_cv_pollable_procfs=no, |
| [ |
| # Guess or punt. |
| case "$host_os" in |
| solaris2*|irix5*|svr4.2uw*|svr5*) |
| ac_cv_pollable_procfs=yes |
| ;; |
| *) |
| ac_cv_pollable_procfs=no |
| ;; |
| esac |
| ])]) |
| AC_MSG_RESULT($ac_cv_pollable_procfs) |
| if test "$ac_cv_pollable_procfs" = yes |
| then |
| AC_DEFINE(HAVE_POLLABLE_PROCFS) |
| fi |
| ]) |
| |
| dnl ### A macro to determine if the prstatus structure has a pr_syscall member. |
| AC_DEFUN(AC_STRUCT_PR_SYSCALL, |
| [AC_MSG_CHECKING(for pr_syscall in struct prstatus) |
| AC_CACHE_VAL(ac_cv_struct_pr_syscall, |
| [AC_TRY_COMPILE([#include <sys/procfs.h>], |
| [#ifdef HAVE_MP_PROCFS |
| pstatus_t s; |
| s.pr_lwp.pr_syscall |
| #else |
| prstatus_t s; |
| s.pr_syscall |
| #endif], |
| ac_cv_struct_pr_syscall=yes, |
| ac_cv_struct_pr_syscall=no)]) |
| AC_MSG_RESULT($ac_cv_struct_pr_syscall) |
| if test "$ac_cv_struct_pr_syscall" = yes |
| then |
| AC_DEFINE(HAVE_PR_SYSCALL) |
| fi |
| ]) |
| |
| dnl ### A macro to detect the presence of the sig_atomic_t in signal.h |
| AC_DEFUN(AC_SIG_ATOMIC_T, |
| [AC_MSG_CHECKING(for sig_atomic_t in signal.h) |
| AC_CACHE_VAL(ac_cv_sig_atomic_t, |
| [AC_TRY_COMPILE([#include <signal.h>], |
| [sig_atomic_t x;], |
| ac_cv_sig_atomic_t=yes, |
| ac_cv_sig_atomic_t=no)]) |
| AC_MSG_RESULT($ac_cv_sig_atomic_t) |
| if test "$ac_cv_sig_atomic_t" = yes |
| then |
| AC_DEFINE(HAVE_SIG_ATOMIC_T) |
| fi |
| ]) |
| |
| dnl ### A macro to determine if sys_errlist is declared. |
| AC_DEFUN(AC_DECL_SYS_ERRLIST, |
| [AC_MSG_CHECKING([for sys_errlist declaration]) |
| AC_CACHE_VAL(ac_cv_decl_sys_errlist, |
| [AC_TRY_COMPILE([#include <sys/types.h> |
| #include <errno.h> |
| #include <stdio.h> |
| /* Somebody might declare sys_errlist in unistd.h. */ |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif], [char *msg = *(sys_errlist + 1);], |
| ac_cv_decl_sys_errlist=yes, ac_cv_decl_sys_errlist=no)])dnl |
| AC_MSG_RESULT($ac_cv_decl_sys_errlist) |
| if test $ac_cv_decl_sys_errlist = yes; then |
| AC_DEFINE(SYS_ERRLIST_DECLARED) |
| fi |
| ]) |
| |
| dnl ### A macro to determine if _sys_siglist is declared. |
| AC_DEFUN(AC_DECL__SYS_SIGLIST, |
| [AC_MSG_CHECKING([for _sys_siglist declaration]) |
| AC_CACHE_VAL(ac_cv_decl__sys_siglist, |
| [AC_TRY_COMPILE([#include <sys/types.h> |
| #include <signal.h> |
| /* Somebody might declare _sys_siglist in unistd.h. */ |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif], [char *msg = *(_sys_siglist + 1);], |
| ac_cv_decl__sys_siglist=yes, ac_cv_decl__sys_siglist=no)])dnl |
| AC_MSG_RESULT($ac_cv_decl__sys_siglist) |
| if test $ac_cv_decl__sys_siglist = yes; then |
| AC_DEFINE(SYS_SIGLIST_DECLARED) |
| fi |
| ]) |
| |
| dnl ### A macro to determine if the msghdr structure has a msg_control member. |
| AC_DEFUN(AC_STRUCT_MSG_CONTROL, |
| [AC_MSG_CHECKING(for msg_control in struct msghdr) |
| AC_CACHE_VAL(ac_cv_struct_msg_control, |
| [AC_TRY_COMPILE([#include <sys/types.h> |
| #include <sys/socket.h>], |
| [#undef msg_control |
| struct msghdr m; m.msg_control;], |
| ac_cv_struct_msg_control=yes, |
| ac_cv_struct_msg_control=no)]) |
| AC_MSG_RESULT($ac_cv_struct_msg_control) |
| if test "$ac_cv_struct_msg_control" = yes |
| then |
| AC_DEFINE(HAVE_MSG_CONTROL) |
| fi |
| ]) |
| |
| dnl ### A macro to determine whether stat64 is defined. |
| AC_DEFUN(AC_STAT64, |
| [AC_MSG_CHECKING(for stat64 in (asm|sys)/stat.h) |
| AC_CACHE_VAL(ac_cv_type_stat64, |
| [AC_TRY_COMPILE([#ifdef linux |
| #include <asm/stat.h> |
| #else |
| #include <sys/stat.h> |
| #endif], |
| [struct stat64 st;], |
| ac_cv_type_stat64=yes, |
| ac_cv_type_stat64=no)]) |
| AC_MSG_RESULT($ac_cv_type_stat64) |
| if test "$ac_cv_type_stat64" = yes |
| then |
| AC_DEFINE(HAVE_STAT64) |
| fi |
| ]) |
| |
| dnl ### A macro to determine whether we have long long |
| AC_DEFUN(AC_LONG_LONG, |
| [AC_MSG_CHECKING(for long long) |
| AC_CACHE_VAL(ac_cv_type_long_long, |
| [AC_TRY_COMPILE([], |
| [long long x = 20;], |
| ac_cv_type_long_long=yes, |
| ac_cv_type_long_long=no)]) |
| AC_MSG_RESULT($ac_cv_type_long_long) |
| if test "$ac_cv_type_long_long" = yes |
| then |
| AC_DEFINE(HAVE_LONG_LONG) |
| fi |
| ]) |
| |
| dnl ### A macro to determine whether sin6_scope_id is available. |
| AC_DEFUN(AC_SIN6_SCOPE_ID, |
| [AC_MSG_CHECKING(for sin6_scope_id in sockaddr_in6) |
| AC_CACHE_VAL(ac_cv_have_sin6_scope_id, |
| [AC_TRY_COMPILE([#include <netinet/in.h>], |
| [ struct sockaddr_in6 s; s.sin6_scope_id = 0; ], |
| ac_cv_have_sin6_scope_id=yes, |
| ac_cv_have_sin6_scope_id=no)]) |
| AC_MSG_RESULT($ac_cv_have_sin6_scope_id) |
| if test "$ac_cv_have_sin6_scope_id" = "yes" ; then |
| AC_DEFINE(HAVE_SIN6_SCOPE_ID) |
| else |
| AC_MSG_CHECKING(for sin6_scope_id in linux sockaddr_in6) |
| AC_CACHE_VAL(ac_cv_have_sin6_scope_id_linux, |
| [AC_TRY_COMPILE([#include <linux/in6.h>], |
| [ struct sockaddr_in6 s; s.sin6_scope_id = 0; ], |
| ac_cv_have_sin6_scope_id_linux=yes, |
| ac_cv_have_sin6_scope_id_linux=no)]) |
| AC_MSG_RESULT($ac_cv_have_sin6_scope_id_linux) |
| if test "$ac_cv_have_sin6_scope_id_linux" = "yes" ; then |
| AC_DEFINE(HAVE_SIN6_SCOPE_ID) |
| AC_DEFINE(HAVE_SIN6_SCOPE_ID_LINUX) |
| fi |
| fi |
| ]) |
| |