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| author |  Ævar Arnfjörð Bjarmason <avarab@gmail.com> | 2022-04-05 21:56:20 +0200 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2022-04-06 09:43:48 -0700 |
| commit | 8af0699b7a86a6f3c2fe9b745bcbe56ec777feac (patch) | |
| tree | de39e194b4cf6aeb0f3241037f84ad35fe3c7003 | |
| parent | Makefile: use ' ', not non-existing $(wspfx_SQ) (diff) | |
| download | tgif-8af0699b7a86a6f3c2fe9b745bcbe56ec777feac.tar.xz | |
Documentation/Makefile: fix "make info" regression in dad9cd7d518
Fix a regression in my dad9cd7d518 (Makefile: move ".SUFFIXES" rule to
shared.mak, 2022-03-03). As explained in the GNU make documentation
for the $* variable, available at:
info make --index-search='$*'
This rule relied on ".texi" being in the default list of suffixes, as
seen at:
make -f/dev/null -p | grep -v -e ^# -e ^$|grep -F .SUFFIXES
The documentation explains what was going on here:
In an explicit rule, there is no stem; so '$*' cannot be determined
in that way. Instead, if the target name ends with a recognized
suffix (*note Old-Fashioned Suffix Rules: Suffix Rules.), '$*' is
set to the target name minus the suffix. For example, if the
target name is 'foo.c', then '$*' is set to 'foo', since '.c' is a
suffix. GNU 'make' does this bizarre thing only for compatibility
with other implementations of 'make'. You should generally avoid
using '$*' except in implicit rules or static pattern rules.
If the target name in an explicit rule does not end with a
recognized suffix, '$*' is set to the empty string for that rule.
I.e. this rule added back in 5cefc33bffd (Documentation: add
gitman.info target, 2007-12-10) was resolving gitman.texi from
gitman.info. We can instead just use the more obvious $< variable
referring to the prerequisite.
This was the only use of $* in our Makefiles in an explicit rule, the
three remaining ones are all implicit rules, and therefore didn't
depend on the ".SUFFIXES" list.
Reported-by: Adam Dinwoodie <adam@dinwoodie.org>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Tested-by: Adam Dinwoodie <adam@dinwoodie.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | Documentation/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/Makefile b/Documentation/Makefile index 1eb9192dae..44c080e3e5 100644 --- a/Documentation/Makefile +++ b/Documentation/Makefile @@ -390,7 +390,7 @@ gitman.texi: $(MAN_XML) cat-texi.perl texi.xsl $(RM) $@+ gitman.info: gitman.texi - $(QUIET_MAKEINFO)$(MAKEINFO) --no-split --no-validate $*.texi + $(QUIET_MAKEINFO)$(MAKEINFO) --no-split --no-validate $< $(patsubst %.txt,%.texi,$(MAN_TXT)): %.texi : %.xml $(QUIET_DB2TEXI)$(DOCBOOK2X_TEXI) --to-stdout $*.xml >$@ |