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Makefile: simplify output of the libpath_template 

If a platform lacks the support to specify the dynamic library path,
there is no suitable value to give to the CC_LD_DYNPATH variable.
Allow them to be set to an empty string to signal that they do not
need to add the usual -Wl,-rpath, or -R or whatever option followed
by a directory name.  This way,

    $(call libpath_template,$(SOMELIBDIR))

would expand to just a single mention of that directory, i.e.

    -L$(SOMELIBDIR)

when CC_LD_DYNPATH is set to an empty string (or a "-L", which
would have repeated the same "-L$(SOMELIBDIR)" twice without any
ill effect).

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2024-01-31 09:42:20 -08:00
parent 354dbf7d64
commit 4ee286e8e6
1 changed files with 3 additions and 1 deletions
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4
shared.mak
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@ -111,6 +111,8 @@ endef
## Getting sick of writing -L$(SOMELIBDIR) $(CC_LD_DYNPATH)$(SOMELIBDIR)?
## Write $(call libpath_template,$(SOMELIBDIR)) instead, perhaps?
## With CC_LD_DYNPATH set to either an empty string or to "-L", the
## the directory is not shown the second time.
define libpath_template
-L$(1) $(CC_LD_DYNPATH)$(1)
-L$(1) $(if $(filter-out -L,$(CC_LD_DYNPATH)),$(CC_LD_DYNPATH)$(1))
endef