$NetBSD$

long options need two dashes.

--- doc/Makefile.in.orig	2025-02-23 20:39:21.000000000 +0000
+++ doc/Makefile.in
@@ -1,7 +1,7 @@
 MANFILES = asy.1 xasy.1x
 ASYFILES = $(filter-out $(wildcard latexusage-*.asy),$(wildcard *.asy))
 SOURCE = asymptote.texi version.texi options
-ASY = ../asy -dir ../base -config "" -render=0
+ASY = ../asy --dir ../base --config "" --render=0
 DOCFILES = asymptote.pdf asy-latex.pdf CAD.pdf TeXShopAndAsymptote.pdf \
            asyRefCard.pdf
 
@@ -39,14 +39,14 @@ faq:
 	$(ASY) -f eps $<
 
 %.pdf:	%.asy
-	$(ASY) -f pdf -noprc $<
+	$(ASY) -f pdf --noprc $<
 
 latexusage.pdf: latexusage.tex asymptote.sty
 	rm -f latexusage-*
 	rm -f latexusage.pre
 	rm -f latexusage.aux
 	pdflatex latexusage
-	$(ASY) -noprc latexusage-*.asy
+	$(ASY) --noprc latexusage-*.asy
 	pdflatex latexusage
 
 options: ../settings.cc