Merge remote-tracking branch 'autothing/v3/master'

1 files changed, 23 insertions, 0 deletions

diff --git a/build-aux/Makefile.once.head/10-write-atomic.mk b/build-aux/Makefile.once.head/10-write-atomic.mk
new file mode 100644
index 0000000..c4aa808
--- /dev/null
+++ b/build-aux/Makefile.once.head/10-write-atomic.mk
@@ -0,0 +1,23 @@
+mod.write-atomic.description = `write-atomic` auxiliary build script
+mod.write-atomic.files += $(topsrcdir)/build-aux/write-atomic
+define mod.write-atomic.doc
+# User variables:
+#   - `WRITE_ATOMIC ?= $(topsrcdir)/build-aux/write-atomic`
+# Inputs:
+#   (none)
+# Outputs:
+#   (none)
+#
+# The $(WRITE_ATOMIC) program reads a file from stdin, and writes it to
+# the file named in argv[1], but does so atomically.
+#
+# That is, the following lines are almost equivalient:
+#
+#     ... > $@
+#     ... | $(WRITE_ATOMIC) $@
+#
+# The are only different in that one is atomic, while the other is not.
+endef
+mod.write-atomic.doc := $(value mod.write-atomic.doc)
+
+WRITE_ATOMIC ?= $(topsrcdir)/build-aux/write-atomic