diff options
| -rw-r--r-- | configure.ac | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 56f08147..b323576f 100644 --- a/configure.ac +++ b/configure.ac @@ -3,6 +3,9 @@ AM_INIT_AUTOMAKE(cdec,0.1) AC_CONFIG_HEADERS(config.h) AC_PROG_LIBTOOL AC_PROG_LEX +case $LEX in +:) AC_MSG_ERROR([No lex (Flex, lex, etc.) program found]);; +esac AC_PROG_CC AC_PROG_CXX AC_LANG_CPLUSPLUS |