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Re: [PATCH] Install libm.a as linker script [BZ #20539]
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Andrew Senkevich <andrew dot n dot senkevich at gmail dot com>
- Cc: libc-alpha <libc-alpha at sourceware dot org>
- Date: Mon, 24 Oct 2016 15:02:03 -0700
- Subject: Re: [PATCH] Install libm.a as linker script [BZ #20539]
- Authentication-results: sourceware.org; auth=none
- References: <CAMXFM3szvCP13C1P_Ed8NVV_FTt4Q8avz4uW-a=UbpWqMnF5aw@mail.gmail.com>
On Thu, Oct 20, 2016 at 12:20 PM, Andrew Senkevich
<andrew.n.senkevich@gmail.com> wrote:
> Hi,
>
> to avoid static link fail w/o passing additional -lmvec option (while
> building with GCC 6.1 and above) this patch makes libm.a installed as
> linker script.
> Tested on x86_64. Ok for trunk?
A couple issues. Don't use cut/paste since it adds some newlines
and the patch won't apply.
> 2016-10-20 Andrew Senkevich <andrew.senkevich@intel.com>
>
> [BZ #20539]
> * Makerules (install-lib.a): filter out libm.a in case of libmvec build.
> * math/Makefile: added rules for libm.a installation as linker script.
>
> diff --git a/Makerules b/Makerules
> index e865782..290f927 100644
> --- a/Makerules
> +++ b/Makerules
> @@ -1190,7 +1190,9 @@ $(addprefix $(inst_sbindir)/,$(install-sbin)): \
> $(do-install-program)
> endif
> ifdef install-lib
> -install-lib.a := $(filter lib%.a,$(install-lib))
> +ifeq ($(build-mathvec),yes)
> +install-lib.a := $(filter-out libm.a,$(filter lib%.a,$(install-lib)))
> +endif
Should we use $(install-lib-ldscripts) instead of libm.a here?
> install-lib-non.a := $(filter-out lib%.a,$(install-lib))
> ifdef install-lib-non.a
> $(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
> diff --git a/math/Makefile b/math/Makefile
> index 2aa6a34..a96ef30 100644
> --- a/math/Makefile
> +++ b/math/Makefile
> @@ -128,8 +128,8 @@ generated += $(foreach s,.c .S,$(call
> type-foreach, $(calls:s_%=m_%$(s))))
> routines = $(call type-foreach, $(calls))
>
> ifeq ($(build-mathvec),yes)
> -# We need to install libm.so as linker script
> -# for more comfortable use of vector math library.
> +# We need to install libm.so and libm.a as linker scripts
> +# for transparent use of vector math library.
> install-lib-ldscripts := libm.so
> install_subdir: $(inst_libdir)/libm.so
> $(inst_libdir)/libm.so: $(common-objpfx)format.lds \
> @@ -142,6 +142,19 @@ $(inst_libdir)/libm.so: $(common-objpfx)format.lds \
> 'AS_NEEDED ( $(libdir)/libmvec_nonshared.a
> $(slibdir)/libmvec.so$(libmvec.so-version) ) )' \
> ) > $@.new
> mv -f $@.new $@
> +
> +install-others = $(inst_libdir)/libm.a
> +$(inst_libdir)/libm.a: $(common-objpfx)format.lds \
> + $(libm) \
> + $(libmvec) \
> + $(+force)
> + (echo '/* GNU ld script'; echo '*/';\
> + cat $<; \
> + echo 'GROUP ( $(libdir)/libm-$(lib-version).a ' \
> + 'AS_NEEDED ( $(libdir)/libmvec.a) )' \
^^^^^^^^^^^^^ Remove it.
> + ) > $@.new
> + cp $(objpfx)libm.a $(libdir)/libm-$(lib-version).a
^^^^^ It should be inst_libdir.
> + mv -f $@.new $@
> endif
>
> # Rules for the test suite.
>
Do you need to update rules for building static math tests with
libmvec.a?
--
H.J.