diff options
Diffstat (limited to 'm4/m4.m4')
| -rw-r--r-- | m4/m4.m4 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/m4/m4.m4 b/m4/m4.m4 new file mode 100644 index 0000000..e48d690 --- /dev/null +++ b/m4/m4.m4 @@ -0,0 +1,17 @@ +# AC_PROG_GNU_M4 +# -------------- +# Check for GNU m4, at least 1.3 (supports frozen files). +AC_DEFUN([AC_PROG_GNU_M4], +[AC_PATH_PROGS(M4, gm4 gnum4 m4, m4) +AC_CACHE_CHECK(version of $M4, ac_cv_m4_version, +[ + ac_cv_m4_version=`$M4 --version | head -n 1 | sed -E -e 's/^.*[[ ]]([[1-9]][[0-9]]*\.)/\1/g' -e 's/[[^0-9.]]*$//' 2>/dev/null` + test -z "$ac_cv_m4_version" && ac_cv_m4_version=unknown +]) +AC_CACHE_CHECK(whether $M4 supports frozen files, ac_cv_prog_gnu_m4, +[ac_cv_prog_gnu_m4=no +if test x"$M4" != x; then + case `$M4 --help < /dev/null 2>&1` in + *reload-state*) ac_cv_prog_gnu_m4=yes ;; + esac +fi])]) |