The echo|sed is used to split the dirname & filename so it can insert $(DEPDIR) in the middle, and then chop the trailing object suffix. In the generic case, %OBJ% is $@, so we can leverage the POSIX vars $(@D) and $(@F) to do the pathname splitting and insert $(DEPDIR) in between. For chopping the object suffix, we can use the $(xxx:...=...) syntax. This avoids invoking sed completely.
These dirname/filename vars have been in POSIX since at least 2004. https://pubs.opengroup.org/onlinepubs/009695399/utilities/make.html > Each of the internal macros has an alternative form. When an > uppercase 'D' or 'F' is appended to any of the macros, the > meaning shall be changed to the directory part for 'D' and > filename part for 'F'. The directory part is the path prefix > of the file without a trailing slash; for the current directory, > the directory part is '.'. * lib/am/depend2.am: Change echo|sed logic to make variables. --- lib/am/depend2.am | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/lib/am/depend2.am b/lib/am/depend2.am index 507fa40b54a0..87546f9d8274 100644 --- a/lib/am/depend2.am +++ b/lib/am/depend2.am @@ -42,7 +42,7 @@ if %FASTDEP% ?!GENERIC? %SILENT%$(am__mv) %DEPBASE%.Tpo %DEPBASE%.Po ?GENERIC??!SUBDIROBJ? %VERBOSE%%COMPILE% -MT %OBJ% -MD -MP -MF %DEPBASE%.Tpo %-c% -o %OBJ% %SOURCEFLAG%%SOURCE% ?GENERIC??!SUBDIROBJ? %SILENT%$(am__mv) %DEPBASE%.Tpo %DEPBASE%.Po -?GENERIC??SUBDIROBJ? %VERBOSE%depbase=`echo %OBJ% | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.o$$||'`;\ +?GENERIC??SUBDIROBJ? %VERBOSE%depbase='$(@D)/$(DEPDIR)/$(@F:.o=)';\ ?GENERIC??SUBDIROBJ? %COMPILE% -MT %OBJ% -MD -MP -MF %DEPBASE%.Tpo %-c% -o %OBJ% %SOURCEFLAG%%SOURCE% &&\ ?GENERIC??SUBDIROBJ? $(am__mv) %DEPBASE%.Tpo %DEPBASE%.Po else !%FASTDEP% @@ -69,7 +69,7 @@ if %FASTDEP% ?!GENERIC? %SILENT%$(am__mv) %DEPBASE%.Tpo %DEPBASE%.Po ?GENERIC??!SUBDIROBJ? %VERBOSE%%COMPILE% -MT %OBJOBJ% -MD -MP -MF %DEPBASE%.Tpo %-c% -o %OBJOBJ% %SOURCEFLAG%`$(CYGPATH_W) '%SOURCE%'` ?GENERIC??!SUBDIROBJ? %SILENT%$(am__mv) %DEPBASE%.Tpo %DEPBASE%.Po -?GENERIC??SUBDIROBJ? %VERBOSE%depbase=`echo %OBJ% | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.obj$$||'`;\ +?GENERIC??SUBDIROBJ? %VERBOSE%depbase='$(@D)/$(DEPDIR)/$(@F:.obj=)';\ ?GENERIC??SUBDIROBJ? %COMPILE% -MT %OBJOBJ% -MD -MP -MF %DEPBASE%.Tpo %-c% -o %OBJOBJ% %SOURCEFLAG%`$(CYGPATH_W) '%SOURCE%'` &&\ ?GENERIC??SUBDIROBJ? $(am__mv) %DEPBASE%.Tpo %DEPBASE%.Po else !%FASTDEP% @@ -98,7 +98,7 @@ if %FASTDEP% ?!GENERIC? %SILENT%$(am__mv) %DEPBASE%.Tpo %DEPBASE%.Plo ?GENERIC??!SUBDIROBJ? %VERBOSE%%LTCOMPILE% -MT %LTOBJ% -MD -MP -MF %DEPBASE%.Tpo %-c% -o %LTOBJ% %SOURCEFLAG%%SOURCE% ?GENERIC??!SUBDIROBJ? %SILENT%$(am__mv) %DEPBASE%.Tpo %DEPBASE%.Plo -?GENERIC??SUBDIROBJ? %VERBOSE%depbase=`echo %OBJ% | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.lo$$||'`;\ +?GENERIC??SUBDIROBJ? %VERBOSE%depbase='$(@D)/$(DEPDIR)/$(@F:.lo=)';\ ?GENERIC??SUBDIROBJ? %LTCOMPILE% -MT %LTOBJ% -MD -MP -MF %DEPBASE%.Tpo %-c% -o %LTOBJ% %SOURCEFLAG%%SOURCE% &&\ ?GENERIC??SUBDIROBJ? $(am__mv) %DEPBASE%.Tpo %DEPBASE%.Plo else !%FASTDEP% -- 2.39.0
