[LTP] [PATCH] Fix build with libnuma-dev on some distributions

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> On some distributions when libnuma-dev is installed the tst_numa.o,
> which was added to libltp.a pulls in symbols from numa library to random
> unrealted tests which breaks the build.
> 
> This commit hence moves the tst_numa to a separate libltpnuma.a library
> that is used for linking only for tests that actually use it and link
> with -lnuma.
> 
> Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
> CC: Jan Stancek <jstancek@redhat.com>
> ---
> 
> This should fix the build failures, beware not build tested yet.

I'm fine with approach. I'd suggest different directory name, but
it's hard to come up with something nice. Maybe:
libnumafn, libnumautils (maybe taken), libtstnuma

Might be less confusing if it doesn't share same name as existing
library.

> 
>  Makefile                                         |  6 +++---
>  libnuma/Makefile                                 | 10 ++++++++++
>  {lib => libnuma}/tst_numa.c                      |  0
>  testcases/kernel/syscalls/set_mempolicy/Makefile |  3 ++-
>  4 files changed, 15 insertions(+), 4 deletions(-)
>  create mode 100644 libnuma/Makefile
>  rename {lib => libnuma}/tst_numa.c (100%)
> 
> diff --git a/Makefile b/Makefile
> index bcadd21b2..3d3c70339 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -77,7 +77,7 @@ INSTALL_TARGETS		+= runtest scenario_groups testscripts
>  CLEAN_TARGETS		+= include runtest scenario_groups testscripts
>  endif
>  INSTALL_TARGETS		+= $(COMMON_TARGETS)
> -CLEAN_TARGETS		+= $(COMMON_TARGETS) lib
> +CLEAN_TARGETS		+= $(COMMON_TARGETS) lib libnuma
>  BOOTSTRAP_TARGETS	:= $(sort $(COMMON_TARGETS) $(CLEAN_TARGETS)
>  $(INSTALL_TARGETS))
>  
>  CLEAN_TARGETS		:= $(addsuffix -clean,$(CLEAN_TARGETS))
> @@ -89,7 +89,7 @@ MAKE_TARGETS		:= $(addsuffix -all,$(filter-out
> lib,$(COMMON_TARGETS)))
>  # overtaxed one, or one where -j => 1 was specified.
>  all: $(addsuffix -all,$(COMMON_TARGETS)) Version
>  
> -$(MAKE_TARGETS): lib-all
> +$(MAKE_TARGETS): lib-all libnuma-all
>  
>  .PHONY: include-all include-install
>  include-install: $(top_builddir)/include/config.h include/mk/config.mk
>  include-all
> @@ -110,7 +110,7 @@ $(sort $(addprefix
> $(abs_top_builddir)/,$(BOOTSTRAP_TARGETS)) $(INSTALL_DIR) $(D
>  ## Pattern based subtarget rules.
>  lib-install: lib-all
>  
> -$(MAKE_TARGETS) include-all lib-all:
> +$(MAKE_TARGETS) include-all lib-all libnuma-all:
>  	$(MAKE) -C "$(subst -all,,$@)" \
>  		-f "$(abs_top_srcdir)/$(subst -all,,$@)/Makefile" all
>  
> diff --git a/libnuma/Makefile b/libnuma/Makefile
> new file mode 100644
> index 000000000..e41fc9c72
> --- /dev/null
> +++ b/libnuma/Makefile
> @@ -0,0 +1,10 @@
> +#
> +
> +top_srcdir		?= ..
> +
> +include $(top_srcdir)/include/mk/env_pre.mk
> +
> +LIB			:= libltpnuma.a
> +
> +include $(top_srcdir)/include/mk/lib.mk
> +include $(top_srcdir)/include/mk/generic_trunk_target.mk
> diff --git a/lib/tst_numa.c b/libnuma/tst_numa.c
> similarity index 100%
> rename from lib/tst_numa.c
> rename to libnuma/tst_numa.c
> diff --git a/testcases/kernel/syscalls/set_mempolicy/Makefile
> b/testcases/kernel/syscalls/set_mempolicy/Makefile
> index d273b432b..b21fdd004 100644
> --- a/testcases/kernel/syscalls/set_mempolicy/Makefile
> +++ b/testcases/kernel/syscalls/set_mempolicy/Makefile
> @@ -2,6 +2,7 @@ top_srcdir		?= ../../../..
>  
>  include $(top_srcdir)/include/mk/testcases.mk
>  
> -LDLIBS  += $(NUMA_LIBS)
> +LDFLAGS += -L$(top_builddir)/libnuma
> +LDLIBS  += $(NUMA_LIBS) -lltpnuma
>  
>  include $(top_srcdir)/include/mk/generic_leaf_target.mk
> --
> 2.19.2
> 
>