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-rw-r--r--doc/Makefile.am4
-rw-r--r--doc/frr-sphinx.mk3
2 files changed, 7 insertions, 0 deletions
diff --git a/doc/Makefile.am b/doc/Makefile.am
index caa909d50d..aeabc0981d 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -9,6 +9,10 @@
# Note the absence of the 'developer' directory here; development docs are
# never built as part of a regular build. They are only built when explicitly
# asked for. See comment further down.
+
+# Sphinx is not designed to be invoked multiple times against the same toctree.
+.NOTPARALLEL:
+
SUBDIRS = manpages user
AM_MAKEFLAGS = DESTDIR=${DESTDIR} infodir=${infodir} doczdir=${abs_srcdir}
diff --git a/doc/frr-sphinx.mk b/doc/frr-sphinx.mk
index f5aca7a655..3d91e8f63d 100644
--- a/doc/frr-sphinx.mk
+++ b/doc/frr-sphinx.mk
@@ -1,6 +1,9 @@
# Makefile for Sphinx documentation
#
+# Sphinx is not designed to be invoked multiple times against the same toctree.
+.NOTPARALLEL:
+
# You can set these variables from the command line.
SPHINXOPTS ?=
SPHINXBUILD ?= sphinx-build