diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/configure.in b/configure.in index 8271cd1..04afe31 100644 --- a/configure.in +++ b/configure.in @@ -41,11 +41,16 @@ AC_ARG_ENABLE([debug], AC_PROG_CXX AC_PROG_CC AC_PROG_YACC -if test "$YACC" != byacc; then - YACC="$SHELL $missing_dir/missing byacc" - AC_SUBST(YACC, "byacc") +if test "$YACC" = yacc; then + AC_CHECK_PROG([REALLY_YACC], [yacc], [yacc]) + if test "$REALLY_YACC" = ""; then + AC_MSG_ERROR([This program cannot be built unless a version of yacc is installed.]) + fi fi AM_PROG_LEX +if test "$LEX" != flex; then + AC_MSG_ERROR([This program cannot be built unless flex is installed.]) +fi AC_PROG_LIBTOOL # Checks for header files. |