Mercurial > dovecot > core-2.2
diff configure.in @ 50:d493b9cc265e HEAD
Introduced uoff_t which is the unsigned-equilevant of off_t. This was needed
to be able to handle off_t overflows properly. Also changed a few unsigned
int fields into uoff_t so we should now support >2G mails if uoff_t is
64bit. Also fixed several potential integer overflows.
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Tue, 27 Aug 2002 22:16:54 +0300 |
| parents | 1b34ec11fff8 |
| children | db8ea2c11ab7 |
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--- a/configure.in Tue Aug 27 20:35:00 2002 +0300 +++ b/configure.in Tue Aug 27 22:16:54 2002 +0300 @@ -94,7 +94,7 @@ dnl * gcc specific options if test "x$ac_cv_prog_gcc" = "xyes"; then - # -W -Wchar-subscripts -Wpointer-arith -Wcast-align -Wconversion -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations + # -Wchar-subscripts -Wpointer-arith -Wcast-align -Wconversion -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations CFLAGS="$CFLAGS -Wall -W" fi @@ -107,6 +107,52 @@ ;; esac +dnl * off_t checks, try to make it 64bit +preferred_off_t_bits=32 +AC_DEFINE_UNQUOTED(_FILE_OFFSET_BITS, $preferred_off_t_bits) + +AC_MSG_CHECKING([size of off_t]) +sizeof_off_t=0 +for size in 4 8; do + AC_TRY_RUN([ + #define _FILE_OFFSET_BITS $preferred_off_t_bits + #include <sys/types.h> + #include <unistd.h> + int main() { off_t size; return sizeof(size) == $size ? 0 : 1; } + ], [ + sizeof_off_t=$size + break + ]) +done + +if test x$sizeof_off_t = x0; then + AC_ERROR([Unsupported off_t size]) +fi +AC_MSG_RESULT($sizeof_off_t) + +AC_CHECK_SIZEOF(int) +AC_CHECK_SIZEOF(long) +AC_CHECK_SIZEOF(long long) + +if test x$sizeof_off_t = x$ac_cv_sizeof_long; then + # try to use unsigned long always first + AC_DEFINE_UNQUOTED(OFF_T_MAX, LONG_MAX) + AC_DEFINE_UNQUOTED(UOFF_T_FORMAT, "lu") + AC_DEFINE(UOFF_T_LONG) +elif test x$sizeof_off_t = x$ac_cv_sizeof_int; then + # next try int + AC_DEFINE_UNQUOTED(OFF_T_MAX, INT_MAX) + AC_DEFINE_UNQUOTED(UOFF_T_FORMAT, "u") + AC_DEFINE(UOFF_T_INT) +elif test x$sizeof_off_t = x$ac_cv_sizeof_long_long; then + # and finally long long + AC_DEFINE_UNQUOTED(OFF_T_MAX, LONG_LONG_MAX) + AC_DEFINE_UNQUOTED(UOFF_T_FORMAT, "llu") + AC_DEFINE(UOFF_T_LONG_LONG) +else + AC_ERROR([Couldn't find integer type for off_t]) +fi + dnl * memory alignment, could be 1 for x86 systems but 4 should be dnl * compatible with everyone. note that only 1, 2 and 4 work corrently. dnl * is 8 needed anywhere?