diff options
Diffstat (limited to 'm4/socklen_t.m4')
| -rw-r--r-- | m4/socklen_t.m4 | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/m4/socklen_t.m4 b/m4/socklen_t.m4 new file mode 100644 index 0000000..99ca6d4 --- /dev/null +++ b/m4/socklen_t.m4 @@ -0,0 +1,45 @@ +dnl Check for socklen_t: historically on BSD it is an int, and in +dnl POSIX 1g it is a type of its own, but some platforms use different +dnl types for the argument to getsockopt, getpeername, etc. So we +dnl have to test to find something that will work. + +dnl This is no good, because passing the wrong pointer on C compilers is +dnl likely to only generate a warning, not an error. We don't call this at +dnl the moment. + +AC_DEFUN([TYPE_SOCKLEN_T], +[ + AC_CHECK_TYPE([socklen_t], ,[ + AC_MSG_CHECKING([for socklen_t equivalent]) + AC_CACHE_VAL([rsync_cv_socklen_t_equiv], + [ + # Systems have either "struct sockaddr *" or + # "void *" as the second argument to getpeername + rsync_cv_socklen_t_equiv= + for arg2 in "struct sockaddr" void; do + for t in int size_t unsigned long "unsigned long"; do + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#include <sys/types.h> +#include <sys/socket.h> + + int getpeername (int, $arg2 *, $t *); + ]],[[ + $t len; + getpeername(0,0,&len); + ]])],[ + rsync_cv_socklen_t_equiv="$t" + break + ]) + done + done + + if test "x$rsync_cv_socklen_t_equiv" = x; then + AC_MSG_ERROR([Cannot find a type to use in place of socklen_t]) + fi + ]) + AC_MSG_RESULT($rsync_cv_socklen_t_equiv) + AC_DEFINE_UNQUOTED(socklen_t, $rsync_cv_socklen_t_equiv, + [type to use in place of socklen_t if not defined])], + [#include <sys/types.h> +#include <sys/socket.h>]) +]) |