Explicit -j1 breaks some versions of make (see #2538)

diff --git a/doc/Makefile.am b/doc/Makefile.am
index c151d56b38ea5e9ff6515a448fbe2a1f4e6becf1..4a59f2cc8961d0e2c312f73e40459f11f578bc43 100644 (file)
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -133,7 +133,7 @@ mutt.1: $(srcdir)/mutt.man
 stamp-doc-xml: $(top_srcdir)/makedoc.c $(top_srcdir)/makedoc-defs.h $(top_srcdir)/init.h \
                manual.xml.head $(top_srcdir)/functions.h $(top_srcdir)/OPS* manual.xml.tail \
                $(srcdir)/gen-map-doc $(top_srcdir)/VERSION $(top_srcdir)/ChangeLog
-       $(MAKE) -j1 ../makedoc$(EXEEXT) # we do not want to rebuild the documentation in tarball builds
+       $(MAKE) ../makedoc$(EXEEXT) # we do not want to rebuild the documentation in tarball builds
        ( date=`head -n 1 $(top_srcdir)/ChangeLog | LC_ALL=C cut -d ' ' -f 1` && \
          sed -e "s/@VERSION\@/`cat $(top_srcdir)/VERSION` ($$date)/" $(srcdir)/manual.xml.head && \
          $(MAKEDOC_CPP) $(top_srcdir)/init.h | ../makedoc -s && \