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From: Andrew Senkevich <andrew.n.senkevich@gmail.com>
Date: Tue, 25 Nov 2014 20:13:51 +0300
Message-ID: 
 <CAMXFM3tKFzy+7a7-2VAh_Vd0=HkdCPsc+i5QYOe7h63REXOJwA@mail.gmail.com>
Subject: [PATCH 8/N] [x86_64] Vectorized math functions
To: libc-alpha <libc-alpha@sourceware.org>

This patch changes installation of libm.so to linker script for
utilization of vector math library libmvec.so with no additional
linker flags.

ChangeLog

2014-11-25  Andrew Senkevich  <andrew.n.senkevich@gmail.com>

        * math/Makefile: Added install rule for libm.so as linker script.

        test-misc test-fpucw test-fpucw-ieee tst-definitions test-tgmath \
---
WBR,
Andrew

diff --git a/math/Makefile b/math/Makefile
index f5a23e4..4981358 100644
--- a/math/Makefile
+++ b/math/Makefile
@@ -85,6 +85,22 @@ generated += $(foreach s,.c .S l.c l.S f.c
f.S,$(calls:s_%=m_%$s))
 routines = $(calls) $(calls:=f) $(long-c-$(long-double-fcts))
 long-c-yes = $(calls:=l)

+ifeq ($(build-mathvec),yes)
+# We need to install libm.so as linker script
+# for more comfortable use of vector math library.
+install-lib-ldscripts := libm.so
+install_subdir: $(inst_libdir)/libm.so
+$(inst_libdir)/libm.so: $(common-objpfx)format.lds \
+       $(libm) \
+       $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version) \
+       $(+force)
+       (echo '/* GNU ld script'; echo '*/';\
+       cat $<; \
+       echo 'GROUP ( $(slibdir)/libm.so$(libm.so-version) ' \
+       'AS_NEEDED ( $(slibdir)/libmvec.so$(libmvec.so-version) ) )' \
+       ) > $@
+endif
+
 # Rules for the test suite.
 tests = test-matherr test-fenv atest-exp atest-sincos atest-exp2 basic-test \