gh-139741: Make `dist-pdf` docs archive build work for macOS (#140837)

diff --git a/Doc/Makefile b/Doc/Makefile
index f6f4c721080c4259730ca1f427e0c02b2d6cff86..f16d9cacb1b6fb92b3efdec0252b4b4c1173d807 100644 (file)
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -241,7 +241,8 @@ dist-pdf:
        # as otherwise the full latexmk process is run twice.
        # ($$ is needed to escape the $; https://www.gnu.org/software/make/manual/make.html#Basics-of-Variable-References)
        -sed -i 's/: all-$$(FMT)/:/' build/latex/Makefile
-       (cd build/latex; $(MAKE) clean && $(MAKE) --jobs=$$((`nproc`+1)) --output-sync LATEXMKOPTS='-quiet' all-pdf && $(MAKE) FMT=pdf zip bz2)
+       if [ -n "$(filter output-sync,$(value .FEATURES))" ]; then OUTPUTSYNC=--output-sync; else OUTPUTSYNC=; fi && \
+       (cd build/latex; $(MAKE) clean && $(MAKE) --jobs=$$((`getconf _NPROCESSORS_ONLN`+1)) $$OUTPUTSYNC LATEXMKOPTS='-quiet' all-pdf && $(MAKE) FMT=pdf zip bz2)
        cp build/latex/docs-pdf.zip dist/python-$(DISTVERSION)-docs-pdf-a4.zip
        cp build/latex/docs-pdf.tar.bz2 dist/python-$(DISTVERSION)-docs-pdf-a4.tar.bz2
        @echo "Build finished and archived!"