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-rw-r--r--share/mk/build/pdf/eqn.mk27
1 files changed, 27 insertions, 0 deletions
diff --git a/share/mk/build/pdf/eqn.mk b/share/mk/build/pdf/eqn.mk
new file mode 100644
index 0000000..bb0598b
--- /dev/null
+++ b/share/mk/build/pdf/eqn.mk
@@ -0,0 +1,27 @@
+# Copyright 2021-2024, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: LGPL-3.0-only WITH LGPL-3.0-linking-exception
+
+
+ifndef MAKEFILE_BUILD_PDF_EQN_INCLUDED
+MAKEFILE_BUILD_PDF_EQN_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/pre/tbl.mk
+include $(MAKEFILEDIR)/configure/build-depends/grep.mk
+include $(MAKEFILEDIR)/configure/build-depends/groff-base.mk
+
+
+_PDFMAN_troff := $(patsubst %.eqn,%.pdf.troff,$(_MAN_eqn))
+
+
+$(_PDFMAN_troff): %.pdf.troff: %.eqn $(MK) | $$(@D)/
+ $(info $(INFO_)EQN $@)
+ ! ($(EQN) -Tpdf $(EQNFLAGS) <$< 2>&1 >$@) \
+ | $(GREP) ^ >&2
+
+
+.PHONY: build-pdf-eqn
+build-pdf-eqn: $(_PDFMAN_troff);
+
+
+endif # include guard