projects / bison.git / blame_incremental
| Commit | Line | Data |
|---|---|---|
| 1 | # serial 1 -*- Autoconf -*- | |
| 2 | ||
| 3 | # BISON_AC_PROG_GNU_M4 | |
| 4 | # -------------------- | |
| 5 | # Check for GNU m4, at least 1.3 (supports frozen files). | |
| 6 | AC_DEFUN([BISON_AC_PROG_GNU_M4], | |
| 7 | [AC_PATH_PROGS(M4, gm4 gnum4 m4, m4) | |
| 8 | AC_CACHE_CHECK([whether m4 supports frozen files], | |
| 9 | [ac_cv_prog_gnu_m4], | |
| 10 | [ac_cv_prog_gnu_m4=no | |
| 11 | if test x"$M4" != x; then | |
| 12 | case `$M4 --help < /dev/null 2>&1` in | |
| 13 | *reload-state*) ac_cv_prog_gnu_m4=yes ;; | |
| 14 | esac | |
| 15 | fi]) | |
| 16 | ])# BISON_AC_PROG_GNU_M4 |