[groff] 01/02: [doc] fix non-portable syntax in the doc/me*.me targets

[Ingo Schwarze]

schwarze pushed a commit to branch master
in repository groff.

commit 32a04972ebe9bd06c6417bd68fed591c4ff792b9
Author: Ingo Schwarze <schwarze@openbsd.org>
AuthorDate: Tue Mar 22 15:44:10 2022 +0100

    [doc] fix non-portable syntax in the doc/me*.me targets
    
    POSIX does not define the meaning of $< in non-suffix rules, so use
    the portable $? instead.  This is adequate here because each of
    these three rules has exactly one prerequisite.
    
    OK gbranden@
---
 ChangeLog  | 7 +++++++
 doc/doc.am | 6 +++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 820e33cc..8ff83fb5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2022-03-22  Ingo Schwarze <schwarze@openbsd.org>
+
+       * doc/doc.am: fix non-portable syntax in the doc/me*.me targets:
+       POSIX does not define the meaning of $< in non-suffix rules, so
+       use the portable $? instead.  This is adequate here because each
+       of these three rules has exactly one prerequisite.
+
 2022-03-22  Ingo Schwarze <schwarze@openbsd.org>
 
        * doc/doc.am: fix non-portable syntax in the groff-man-pages.*
diff --git a/doc/doc.am b/doc/doc.am
index 0f4bfb9d..e3e48d16 100644
--- a/doc/doc.am
+++ b/doc/doc.am
@@ -242,15 +242,15 @@ doc/groff-man-pages.utf8.txt: $(GROFF_MAN_PAGES_ALL)
 
 doc/meintro.me: $(doc_srcdir)/meintro.me.in
        $(GROFF_V)$(MKDIR_P) `dirname $@` \
-       && $(DOC_SED) $< >$@
+       && $(DOC_SED) $? >$@
 
 doc/meintro_fr.me: $(doc_srcdir)/meintro_fr.me.in
        $(GROFF_V)$(MKDIR_P) `dirname $@` \
-       && $(DOC_SED) $< >$@
+       && $(DOC_SED) $? >$@
 
 doc/meref.me: $(doc_srcdir)/meref.me.in
        $(GROFF_V)$(MKDIR_P) `dirname $@` \
-       && $(DOC_SED) $< >$@
+       && $(DOC_SED) $? >$@
 
 # The me(7) intro French translation gets its own target rule because it
 # needs the "-mfr" option.