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AC_INIT([Haskell process package],[1.0],[libraries@haskell.org],[process])
# Safety check: Ensure that we are in the correct source directory.
AC_CONFIG_SRCDIR([include/runProcess.h])
AC_CONFIG_HEADERS([include/HsProcessConfig.h])
AC_PROG_CC
dnl ** Working fork?
AC_FUNC_FORK
# check for specific header (.h) files that we are interested in
AC_CHECK_HEADERS([signal.h sys/wait.h fcntl.h])
AC_CHECK_FUNCS([setitimer sysconf])
AC_CHECK_FUNCS([execvpe])
AC_CHECK_FUNCS([pipe2],[],[],[
#define _GNU_SOURCE
#include <unistd.h>
#include <fcntl.h>
])
# posix_spawn checks
AC_CHECK_HEADERS([spawn.h])
AC_CHECK_FUNCS([posix_spawnp posix_spawn_file_actions_addchdir_np posix_spawn_file_actions_addchdir],[],[],[
#define _GNU_SOURCE
#include <spawn.h>
])
AC_CHECK_DECLS([POSIX_SPAWN_SETSID, POSIX_SPAWN_SETSID_NP],[],[],[
#define _GNU_SOURCE
#include <spawn.h>
])
AC_CHECK_DECLS([POSIX_SPAWN_SETPGROUP],[],[],[
#define _GNU_SOURCE
#include <spawn.h>
])
if test "$ac_cv_func_posix_spawnp" = "yes"; then
dnl On OpenBSD posix_spawnp doesn't report ENOENT when
dnl the user attempts to spawn a process with a non-existent
dnl executable. Don't attempt to use such posix_spawn
dnl implementations to ensure errors are reported correctly.
dnl See #224.
AC_MSG_CHECKING(whether posix_spawn reports errors sensibly)
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([
#include <stddef.h>
#include <stdbool.h>
#include <errno.h>
#include <spawn.h>
], [[
pid_t pid;
char *prog = "__nonexistent_program__";
char *args[] = {prog, NULL};
char *env[] = {NULL};
// This should fail with ENOENT
int ret = posix_spawnp(&pid, prog, NULL, NULL, args, env);
bool okay = ret == ENOENT;
return !okay;
]]
)],
[AC_DEFINE([USE_POSIX_SPAWN], [], [posix_spawn should be used])
AC_MSG_RESULT(yes)],
[AC_MSG_RESULT([no, falling back to fork/exec])],
[AC_DEFINE([USE_POSIX_SPAWN], [], [])
AC_MSG_RESULT(cross-compiling - assuming yes)]
)
fi
FP_CHECK_CONSTS([SIG_DFL SIG_IGN])
AC_OUTPUT
|
