[groff] 01/01: tmac.am: do not use $< in a non-portable way

[Ingo Schwarze]

schwarze pushed a commit to branch master
in repository groff.

commit 997b6b3c4582cc2897a1a79fb03dd7d2b88909cb
Author: Ingo Schwarze <schwarze@openbsd.org>
AuthorDate: Wed Oct 14 13:52:29 2020 +0200

    tmac.am: do not use $< in a non-portable way
    
    fixes https://savannah.gnu.org/bugs/?59268
    OK gbranden@
---
 tmac/tmac.am | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tmac/tmac.am b/tmac/tmac.am
index de5d174..05eb259 100644
--- a/tmac/tmac.am
+++ b/tmac/tmac.am
@@ -207,14 +207,14 @@ M4WORDS = 
define|divert|include|index|shift|undefine|undivert
 M4CHECK = tmac/check-groff_man-stamp
 
 $(M4CHECK): tmac/groff_man.7.man.in
-       ! grep -E '(^|[[:space:]])($(M4WORDS))($$|[[:space:]])' $<
-       > $@
+       ! grep -E '(^|[[:space:]])($(M4WORDS))($$|[[:space:]])' \
+         $(tmac_srcdir)/groff_man.7.man.in > $@
 
 tmac/groff_man.7.man: tmac/groff_man.7.man.in $(M4CHECK)
-       m4 -D_groff_man_not_style $< > $@
+       m4 -D_groff_man_not_style $(tmac_srcdir)/groff_man.7.man.in > $@
 
 tmac/groff_man_style.7.man: tmac/groff_man.7.man.in $(M4CHECK)
-       m4 -D_groff_man_style $< > $@
+       m4 -D_groff_man_style $(tmac_srcdir)/groff_man.7.man.in > $@
 
 # The installation of groff compatibility wrappers for vendor-provided
 # non-GNU macro sets is controlled by 'compatibility_wrappers' (see the