powerpc64*: fix the order of implied sysdeps directories

The creation of the divergent sysdeps directory for powerpc64le

commit 2f7f3cd8cd302bb10908c86f3f7b349df0a78e6a
Author: Paul E. Murphy <murphyp@linux.vnet.ibm.com>
Date:   Fri Jul 15 18:04:40 2016 -0500

    powerpc64le: Create divergent sysdep directory for powerpc64le.

allowed float128 to be enabled for powerpc64le (little-endian) and not
for powerpc64 (big-endian).  Since the only intended difference between
them was the presence or absence of the float128 interface, the sysdeps
directory for powerpc64le explicitly reused the files from powerpc64
(through the use of Implies files).

Although this works, it also means that files under the powerpc64
directory might be preferred over files under powerpc64le.  For
instance, on a build for powerpc64le with target set to power9, a file
from powerpc64/power5 might get built, even though a file with the same
name exists in powerpc64le/power8.  That happens because the processor
hierarchy was only defined in the sysdeps directory for powerpc64 (and
borrowed by powerpc64le).

This patch fixes this behavior, by creating new subdirectories under
powerpc64 (i.e.: powerpc64/be and powerpc64/le) and creating new Implies
files to provide the hierarchy of processors for powerpc64 and
powerpc64le separately.  These changes have no effect on installed,
stripped binaries (which remain unchanged).

Tested that installed stripped binaries are unchanged and that there are
no regressions on powerpc64 and powerpc64le.

1 files changed, 81 insertions, 0 deletions

diff --git a/sysdeps/powerpc/powerpc64/le/Makefile b/sysdeps/powerpc/powerpc64/le/Makefile
new file mode 100644
index 0000000000..14d39e28b1
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/le/Makefile
@@ -0,0 +1,81 @@
+# When building float128 we need to ensure -mfloat128 is
+# passed to all such object files.
+
+# libgcc requires __tcb_parse_hwcap_and_convert_at_platform when built with
+# a binary128 type.  That symbol is provided by the loader on dynamically
+# linked executables, forcing to link the loader after libgcc link.
+f128-loader-link = $(as-needed) $(elf-objpfx)ld.so $(no-as-needed)
+
+ifeq ($(subdir),math)
+# sqrtf128 requires emulation before POWER9.
+CPPFLAGS += -I../soft-fp
+
+# float128 requires adding a handful of extra flags.
+$(foreach suf,$(all-object-suffixes),%f128$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),%f128_r$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),$(objpfx)test-float128%$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),$(objpfx)test-float64x%$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),$(objpfx)test-ifloat128%$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),$(objpfx)test-ifloat64x%$(suf)): CFLAGS += -mfloat128
+# Pairs of types with _Float128 / _Float64x as the wider type but not
+# the narrower one.
+f128-pairs = float32-float64x float32-float128 float64-float64x \
+	     float64-float128 float32x-float64x float32x-float128
+$(foreach suf,$(all-object-suffixes),$(foreach pair,$(f128-pairs),$(objpfx)test-$(pair)%$(suf))): CFLAGS += -mfloat128
+CFLAGS-libm-test-support-float128.c += -mfloat128
+CFLAGS-libm-test-support-float64x.c += -mfloat128
+CFLAGS-test-math-iscanonical.cc += -mfloat128
+CFLAGS-test-math-iseqsig.cc += -mfloat128
+CFLAGS-test-math-issignaling.cc += -mfloat128
+CFLAGS-test-math-iszero.cc += -mfloat128
+$(foreach test, \
+	  test-float128% test-ifloat128% test-float64x% test-ifloat64x% \
+	  $(foreach pair,$(f128-pairs),test-$(pair)%) \
+	  test-math-iscanonical test-math-iseqsig test-math-issignaling \
+	  test-math-iszero, \
+	  $(objpfx)$(test)): \
+  gnulib-tests += $(f128-loader-link)
+endif
+
+# Append flags to string <-> _Float128 routines.
+ifneq ($(filter $(subdir),wcsmbs stdlib),)
+$(foreach suf,$(all-object-suffixes),%f128$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),%f128_l$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),%f128_nan$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),%float1282mpn$(suf)): CFLAGS += -mfloat128
+$(foreach suf,$(all-object-suffixes),%mpn2float128$(suf)): CFLAGS += -mfloat128
+CFLAGS-bug-strtod.c += -mfloat128
+CFLAGS-bug-strtod2.c += -mfloat128
+CFLAGS-tst-strtod-round.c += -mfloat128
+CFLAGS-tst-wcstod-round.c += -mfloat128
+CFLAGS-tst-strtod-nan-locale.c += -mfloat128
+CFLAGS-tst-wcstod-nan-locale.c += -mfloat128
+CFLAGS-tst-strtod6.c += -mfloat128
+CFLAGS-tst-strfrom.c += -mfloat128
+CFLAGS-tst-strfrom-locale.c += -mfloat128
+CFLAGS-strfrom-skeleton.c += -mfloat128
+$(foreach test,bug-strtod bug-strtod2 bug-strtod2 tst-strtod-round \
+tst-wcstod-round tst-strtod6 tst-strrom tst-strfrom-locale \
+tst-strtod-nan-locale tst-wcstod-nan-locale \
+strfrom-skeleton,$(objpfx)$(test)): gnulib-tests += $(f128-loader-link)
+
+# When building glibc with support for _Float128, the powers of ten tables in
+# fpioconst.c and in the string conversion functions must be extended.  Some
+# Makefiles (e.g.: wcsmbs/Makefile) override CFLAGS defined by the Makefiles in
+# sysdeps.  This is avoided with the use sysdep-CFLAGS instead of CFLAGS.
+sysdep-CFLAGS += $(sysdep-CFLAGS-$(<F))
+sysdep-CFLAGS-fpioconst.c += -mfloat128
+sysdep-CFLAGS-strtod_l.c += -mfloat128
+sysdep-CFLAGS-strtof_l.c += -mfloat128
+sysdep-CFLAGS-strtold_l.c += -mfloat128
+sysdep-CFLAGS-wcstod_l.c += -mfloat128
+sysdep-CFLAGS-wcstof_l.c += -mfloat128
+sysdep-CFLAGS-wcstold_l.c += -mfloat128
+endif
+
+# Append flags to printf routines.
+ifeq ($(subdir),stdio-common)
+CFLAGS-printf_fp.c = -mfloat128
+CFLAGS-printf_fphex.c = -mfloat128
+CFLAGS-printf_size.c = -mfloat128
+endif