Adding upstream version 2.9.4.upstream/2.9.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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])
+])