Hi Ævar
On 25/02/2022 09:04, Ævar Arnfjörð Bjarmason wrote:
We have various behavior that's shared across our Makefiles, or that
really should be (e.g. via defined templates). Let's create a
top-level "shared.mak" to house those sorts of things, and start by
adding the ".DELETE_ON_ERROR" flag to it.
See my own 7b76d6bf221 (Makefile: add and use the ".DELETE_ON_ERROR"
flag, 2021-06-29) and db10fc6c09f (doc: simplify Makefile using
.DELETE_ON_ERROR, 2021-05-21) for the addition and use of the
".DELETE_ON_ERROR" flag.
This does have the potential downside that if e.g. templates/Makefile
would like to include this "shared.mak" in the future the semantics of
such a Makefile will change, but as noted in the above commits (and
GNU make's own documentation) any such change would be for the better,
so it's safe to do this.
I was confused about the mention of templates/Makefile in this
paragraph, it seems to be saying that the behavior would change in the
future if we included shared.mak in templates/Makefile but this patch
does exactly that.
Also does this patch mean we're now using .DELETE_ON_ERROR in places
where we were not previously using it?
Best Wishes
Phillip
This also doesn't introduce a bug by e.g. having this
".DELETE_ON_ERROR" flag only apply to this new shared.mak, Makefiles
have no such scoping semantics.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
Documentation/Makefile | 6 +++---
Makefile | 13 +++----------
contrib/scalar/Makefile | 3 +++
contrib/scalar/t/Makefile | 3 +++
shared.mak | 9 +++++++++
t/Makefile | 3 +++
t/interop/Makefile | 3 +++
t/perf/Makefile | 3 +++
templates/Makefile | 3 +++
9 files changed, 33 insertions(+), 13 deletions(-)
create mode 100644 shared.mak
diff --git a/Documentation/Makefile b/Documentation/Makefile
index ed656db2ae9..ba27456c86a 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -1,3 +1,6 @@
+# Import tree-wide shared Makefile behavior and libraries
+include ../shared.mak
+
# Guard against environment variables
MAN1_TXT =
MAN5_TXT =
@@ -524,7 +527,4 @@ doc-l10n install-l10n::
$(MAKE) -C po $@
endif
-# Delete the target file on error
-.DELETE_ON_ERROR:
-
.PHONY: FORCE
diff --git a/Makefile b/Makefile
index 6f0b4b775fe..d378ec22545 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
+# Import tree-wide shared Makefile behavior and libraries
+include shared.mak
+
# The default target of this Makefile is...
all::
@@ -2194,16 +2197,6 @@ shell_compatibility_test: please_set_SHELL_PATH_to_a_more_modern_shell
strip: $(PROGRAMS) git$X
$(STRIP) $(STRIP_OPTS) $^
-### Flags affecting all rules
-
-# A GNU make extension since gmake 3.72 (released in late 1994) to
-# remove the target of rules if commands in those rules fail. The
-# default is to only do that if make itself receives a signal. Affects
-# all targets, see:
-#
-# info make --index-search=.DELETE_ON_ERROR
-.DELETE_ON_ERROR:
-
### Target-specific flags and dependencies
# The generic compilation pattern rule and automatically
diff --git a/contrib/scalar/Makefile b/contrib/scalar/Makefile
index 5b12a437426..6fb5cc8b701 100644
--- a/contrib/scalar/Makefile
+++ b/contrib/scalar/Makefile
@@ -1,3 +1,6 @@
+# Import tree-wide shared Makefile behavior and libraries
+include ../../shared.mak
+
QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir
QUIET_SUBDIR1 =
diff --git a/contrib/scalar/t/Makefile b/contrib/scalar/t/Makefile
index 6170672bb37..01e82e56d15 100644
--- a/contrib/scalar/t/Makefile
+++ b/contrib/scalar/t/Makefile
@@ -1,3 +1,6 @@
+# Import tree-wide shared Makefile behavior and libraries
+include ../../../shared.mak
+
# Run scalar tests
#
# Copyright (c) 2005,2021 Junio C Hamano, Johannes Schindelin
diff --git a/shared.mak b/shared.mak
new file mode 100644
index 00000000000..0170bb397ae
--- /dev/null
+++ b/shared.mak
@@ -0,0 +1,9 @@
+### Flags affecting all rules
+
+# A GNU make extension since gmake 3.72 (released in late 1994) to
+# remove the target of rules if commands in those rules fail. The
+# default is to only do that if make itself receives a signal. Affects
+# all targets, see:
+#
+# info make --index-search=.DELETE_ON_ERROR
+.DELETE_ON_ERROR:
diff --git a/t/Makefile b/t/Makefile
index 46cd5fc5273..056ce55dcc9 100644
--- a/t/Makefile
+++ b/t/Makefile
@@ -1,3 +1,6 @@
+# Import tree-wide shared Makefile behavior and libraries
+include ../shared.mak
+
# Run tests
#
# Copyright (c) 2005 Junio C Hamano
diff --git a/t/interop/Makefile b/t/interop/Makefile
index 31a4bbc716a..6911c2915a7 100644
--- a/t/interop/Makefile
+++ b/t/interop/Makefile
@@ -1,3 +1,6 @@
+# Import tree-wide shared Makefile behavior and libraries
+include ../../shared.mak
+
-include ../../config.mak
export GIT_TEST_OPTIONS
diff --git a/t/perf/Makefile b/t/perf/Makefile
index 2465770a782..e4808aebed0 100644
--- a/t/perf/Makefile
+++ b/t/perf/Makefile
@@ -1,3 +1,6 @@
+# Import tree-wide shared Makefile behavior and libraries
+include ../../shared.mak
+
-include ../../config.mak
export GIT_TEST_OPTIONS
diff --git a/templates/Makefile b/templates/Makefile
index d22a71a3999..636cee52f51 100644
--- a/templates/Makefile
+++ b/templates/Makefile
@@ -1,3 +1,6 @@
+# Import tree-wide shared Makefile behavior and libraries
+include ../shared.mak
+
# make and install sample templates
ifndef V
