diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-10-30 19:31:24 -0400 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-10-30 19:31:24 -0400 |
commit | a01dcec5398007387f008102030838449e75a4c4 (patch) | |
tree | 36f93acabd930023124eda52f4ada7e6ee39d782 /build-aux/Makefile.once.head | |
parent | 2032840792362c62781dd2661506c5afcc7f9fe7 (diff) |
at: lt: document, fix extra DESTDIR ref
Diffstat (limited to 'build-aux/Makefile.once.head')
-rw-r--r-- | build-aux/Makefile.once.head/10-lt.mk | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/build-aux/Makefile.once.head/10-lt.mk b/build-aux/Makefile.once.head/10-lt.mk index 355a5b4343..2841bfe214 100644 --- a/build-aux/Makefile.once.head/10-lt.mk +++ b/build-aux/Makefile.once.head/10-lt.mk @@ -1,13 +1,49 @@ mod.lt.description = (systemd) Easy handling of libtool dependencies -mod.lt.deps += files quote +mod.lt.depends += files +define mod.lt.doc +# Inputs: +# - Global variable : `$(.LIBPATTERNS)` +# - Directory variable : `$(files.sys)` +# - Target variable : `$@` +# - Target variable : `$(@F)` +# - Target variable : `$^` +# Outputs: +# - Target variable : `lt.lib.rpath` (`$(@D)`, `$(files.sys)`) +# - Target variable : `lt.lib.files.all` (`$^`, `$(.LIBPATTERNS)`) +# - Target variable : `lt.lib.files.ld` (`$(lt.lib.rpath)`, `$(lt.lib.files.all)`) +# - Target variable : `lt.lib.post` (`$(lt.lib.rpath)`, `$(lt.lib.files.all)`) +# - Target variable : `lt.exe.files.all` (`$^`, `$(.LIBPATTERNS)`) +# - Target variable : `lt.exe.files.ld` (an alias for `lt.exe.files.all`) +# +# A set of variables to make interacting with libtool a little easier. +# +# libtool tries to abstract away the difference between static libraries +# and dynamic libraries. But, it does a crappy job. If one library +# depends on another library, you have to care about which of them are +# static and which are dynamic, or you'll either end up with missing +# symbols, or duplicate symbols. Either way, it will fail to link your +# executable. +# +# So, our workaround: don't pass any .la libraries to libtool/ld when +# linking a convenience library, but then run a post-libtool command to +# insert them into the .la file's dependency_libs. This uses the +# emptiness of lt.lib.rpath to determine if a library is a static +# convenience library or not. +endef +mod.lt.doc := $(value mod.lt.doc) _lt.patsubst-all = $(if $1,$(call _lt.patsubst-all,$(wordlist 2,$(words $1),$1),$2,$(patsubst $(firstword $1),$2,$3)),$3) _lt.unLIBPATTERNS = $(foreach _lt.tmp,$1,$(if $(filter $(.LIBPATTERNS),$(notdir $(_lt.tmp))),$(call _lt.patsubst-all,$(.LIBPATTERNS),-l%,$(notdir $(_lt.tmp))),$(_lt.tmp))) _lt.rest = $(wordlist 2,$(words $1),$1) +# Usage: $(call _lt.dedup,ITEM1 ITEM2 ITEM3) +# Removes duplicate items while keeping the order the same (the leftmost of a duplicate is used). _lt.dedup = $(if $1,$(if $(filter $(firstword $1),$(call _lt.rest,$1)),,$(firstword $1) )$(call _lt.dedup,$(call _lt.rest,$1))) +# Usage: $(call _lt.dependency_libs,LIB1.la OBJ.lo LIB2.la) +# => LIB1.la LIB1.la:dependency_libs OBJ.lo LIB2.la LIB2.la:dependency_libs +# Insert a .la library's dependency_libs after the library itself in the list. _lt.dependency_libs = $(foreach _lt.tmp,$1,$(_lt.tmp)$(if $(filter %.la,$(_lt.tmp)), $(shell . $(_lt.tmp); echo $$dependency_libs))) - lt.lib.rpath = $(dir $(patsubst $(DESTDIR)%,%,$(filter %/$(@F),$(files.sys)))) + lt.lib.rpath = $(dir $(filter %/$(@F),$(files.sys)) lt.lib.files.all = $(filter %.lo %.la -l%,$(call _lt.unLIBPATTERNS,$^)) lt.lib.files.ld = $(strip $(if $(lt.lib.rpath),\ $(lt.lib.files.all),\ |