From 35af8d1099e2f3187c70c4c661a44231bdec1f4c Mon Sep 17 00:00:00 2001
From: Vincent Belaïche <vincentb1@users.sourceforge.net>
Date: Sat, 30 May 2026 16:53:15 +0200
Subject: Make build in doc/ happen in parallel over DOCLANGS

This also avoids using ";" in make rules, which doesn't propagate
errors from the first command to the entire line.

* Makefile.in (MAKE_DOC_FOR_DOCLANG): New.
  (MAKE_DOC): delegate to 'MAKE_DOC_FOR_DOCLANG' per language doc build.
---
 Makefile.in | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/Makefile.in b/Makefile.in
index e0a8d1ae579..ac15088418f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1145,10 +1145,17 @@ PDFS  = lispref-pdf  lispintro-pdf  emacs-pdf  misc-pdf
 PSS   = lispref-ps   lispintro-ps   emacs-ps   misc-ps
 
 DOCS = $(DVIS) $(HTMLS) $(INFOS) $(PDFS) $(PSS)
+
+define MAKE_DOC_FOR_DOCLANG
+.PHONY: $(1)-DOCLANG-$(2)
+$(1)-DOCLANG-$(2):
+	$$(MAKE) -C doc/$$(subst -, DOCLANG=$(2) ,$(1))
+
+endef
 define MAKE_DOC
-$(1):
-	$(foreach lang,$(DOCLANGS),$$(MAKE) -C doc/$$(subst -, DOCLANG=$(lang) ,$$@);)
+$(1): $$(addprefix $(1)-DOCLANG-,$(DOCLANGS))
 
+$$(foreach lang,$(DOCLANGS),$$(eval $$(call MAKE_DOC_FOR_DOCLANG,$(1),$$(lang))))
 endef
 $(foreach doc,$(DOCS),$(eval $(call MAKE_DOC,$(doc))))
 
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