diff options
Diffstat (limited to 'm4/man-heirloom-nroff.m4')
| -rw-r--r-- | m4/man-heirloom-nroff.m4 | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/m4/man-heirloom-nroff.m4 b/m4/man-heirloom-nroff.m4 new file mode 100644 index 0000000..85144e7 --- /dev/null +++ b/m4/man-heirloom-nroff.m4 @@ -0,0 +1,33 @@ +# man-heirloom-nroff.m4 serial 1 +dnl MAN_PROG_HEIRLOOM_NROFF(PROGRAM-NAME) +dnl Check whether the given nroff program is from the Heirloom Documentation +dnl Tools. We do this by testing the .X number register; it should be +dnl non-zero, and should change to a different value if the -mg option is +dnl used to enable groff compatibility. +AC_DEFUN([MAN_PROG_HEIRLOOM_NROFF], +[AC_MSG_CHECKING([whether nroff is Heirloom nroff]) + +AC_CACHE_VAL([man_cv_prog_heirloom_nroff], + [man_heirloom_ext_plain=`$1 2>/dev/null <<EOF | tr -d '\n' +\\n(.X +EOF +` + man_heirloom_ext_mg=`$1 -mg 2>/dev/null <<EOF | tr -d '\n' +\\n(.X +EOF +` + if test "x$man_heirloom_ext_plain" != 0 && \ + test "x$man_heirloom_ext_mg" != 0 && \ + test "x$man_heirloom_ext_plain" != "x$man_heirloom_extflag_mg" + then + man_cv_prog_heirloom_nroff=yes + else + man_cv_prog_heirloom_nroff=no + fi]) + +if test "$man_cv_prog_heirloom_nroff" = "yes" +then + AC_DEFINE([HEIRLOOM_NROFF], [1], [Define if nroff is Heirloom nroff.]) +fi +AC_MSG_RESULT([$man_cv_prog_heirloom_nroff]) +]) |