diff options
| -rw-r--r-- | configure.ac | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index c030ec2..113009a 100644 --- a/configure.ac +++ b/configure.ac @@ -34,7 +34,7 @@ AM_CONDITIONAL([IN_GIT], AC_ARG_WITH( [sh], [AS_HELP_STRING([--with-sh=PATH], - [POSIX-conformant shell with `local'])], + [POSIX-conformant shell with `local' and 64-bit arithmetic])], dnl This `dnl' is needed to workaround Vim syntax highlighting. [ case "${withval}" in @@ -57,6 +57,14 @@ AC_ARG_WITH( fi ] ) +AC_MSG_CHECKING([whether ${SH} supports 64-bit arithmetic]) +if test x"$(${SH} -c 'printf "%s\n" "$((2 << 61))"' 2>&AS_MESSAGE_LOG_FD)" = \ + x'4611686018427387904'; then + AC_MSG_RESULT([yes]) +else + AC_MSG_RESULT([no]) + AC_MSG_ERROR([a shell with 64-bit arithmetic is required]) +fi AC_ARG_WITH( [fakeroot], |