[glibc] powerpc64le: Ensure correct ldouble compiler flags are used

[glibc] powerpc64le: Ensure correct ldouble compiler flags are used

[Paul E. Murphy]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=076d06e8494319c1405129ed505fc67f17c0487d

commit 076d06e8494319c1405129ed505fc67f17c0487d
Author: Gabriel F. T. Gomes <gabriel@inconstante.eti.br>
Date:   Thu Dec 28 17:30:06 2017 -0200

    powerpc64le: Ensure correct ldouble compiler flags are used
    
    Ensure the correct ldouble abi flags are applied to ibm128 files and
    nldbl files.  Remove the IEEE options if used, and apply the flags
    used to build ldouble files which are ibm128 abi.
    
    nldbl tests are a little tricky.  To use the support, we must remove
    all ldouble abi flags, and ensure -mlong-double-64 is used.
    
    Co-authored-by: Rajalakshmi Srinivasaraghavan  <raji@linux.vnet.ibm.com>
    Co-authored-by: Tulio Magno Quites Machado Filho  <tuliom@linux.vnet.ibm.com>
    Co-authored-by: Paul E. Murphy  <murphyp@linux.vnet.ibm.com>

Diff:
---
 sysdeps/powerpc/powerpc64/le/Makefile | 58 +++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/sysdeps/powerpc/powerpc64/le/Makefile b/sysdeps/powerpc/powerpc64/le/Makefile
index 86602af8fb..8fe75e54f2 100644
--- a/sysdeps/powerpc/powerpc64/le/Makefile
+++ b/sysdeps/powerpc/powerpc64/le/Makefile
@@ -6,6 +6,13 @@
 # linked executables, forcing to link the loader after libgcc link.
 f128-loader-link = -Wl,--as-needed $(elf-objpfx)ld.so -Wl,--no-as-needed
 
+# Bootstrapping code for enabling IEEE 128.  This can be removed and
+# any indirections simplified once IEEE 128 long double is enabled.
+type-ldouble-CFLAGS =
+ifeq ($(ibm128-fcts),yes)
+type-ldouble-CFLAGS += -mabi=ibmlongdouble
+endif
+
 ifeq ($(subdir),math)
 # sqrtf128 requires emulation before POWER9.
 CPPFLAGS += -I../soft-fp
@@ -33,6 +40,42 @@ $(foreach test, \
 	  test-math-iszero, \
 	  $(objpfx)$(test)): \
   gnulib-tests += $(f128-loader-link)
+
+CFLAGS-s_logbl-power7.c += $(type-ldouble-CFLAGS)
+CFLAGS-s_logbl-ppc64.c += $(type-ldouble-CFLAGS)
+
+$(foreach suf,$(all-object-suffixes),\
+          $(objpfx)s_copysignl$(suf) \
+          $(objpfx)s_fabsl$(suf)): \
+  ASFLAGS += $(type-ldouble-CFLAGS)
+
+$(foreach suf,$(all-object-suffixes),\
+         $(objpfx)libm-test-%ibm128$(suf) \
+         $(objpfx)test-iibm128%$(suf) $(objpfx)test-ibm128%$(suf)): \
+  CFLAGS += $(type-ldouble-CFLAGS)
+
+# Newer GCC (>7) doesn't like -mabi=* and -mlong-double-64
+$(foreach suf,$(all-object-suffixes),\
+         $(objpfx)test-narrow-macros-ldbl-64$(suf) \
+         $(objpfx)test-nldbl-redirect$(suf) \
+         $(objpfx)test-redirection-ldbl-64$(suf) \
+         ): sysdep-CFLAGS := $(filter-out -mabi=ieeelongdouble,$(sysdep-CFLAGS))
+
+endif
+
+# Newer GCC (>7) doesn't like -mabi=* and -mlong-double-64
+ifeq ($(subdir),misc)
+$(foreach suf,$(all-object-suffixes),\
+         $(objpfx)tst-nldbl-warn$(suf) \
+         $(objpfx)tst-nldbl-error$(suf) \
+         ): sysdep-CFLAGS := $(filter-out -mabi=ieeelongdouble,$(sysdep-CFLAGS))
+endif
+
+# Newer GCC (>7) doesn't like -mabi=* and -mlong-double-64
+ifeq ($(subdir),argp)
+$(foreach suf,$(all-object-suffixes),\
+         $(objpfx)tst-nldbl-argp$(suf) \
+         ): sysdep-CFLAGS := $(filter-out -mabi=ieeelongdouble,$(sysdep-CFLAGS))
 endif
 
 # Append flags to string <-> _Float128 routines.
@@ -80,3 +123,18 @@ CFLAGS-printf_fp.c = -mfloat128
 CFLAGS-printf_fphex.c = -mfloat128
 CFLAGS-printf_size.c = -mfloat128
 endif
+
+
+$(foreach suf,$(all-object-suffixes),$(objpfx)nldbl-%$(suf)): \
+  CFLAGS += $(type-ldouble-CFLAGS)
+
+ldbl-ibm128-files = $(objpfx)nldbl-%$(suf) \
+		    $(objpfx)libm-test-%ibm128$(suf) \
+		    $(objpfx)test-iibm128%$(suf) $(objpfx)test-ibm128%$(suf) \
+		    $(objpfx)test-tgmath3-%$(suf)
+
+# Remove -mabi=ieeelongdouble from ldbl-ibm128 files.
+$(foreach suf,$(all-object-suffixes), $(ldbl-ibm128-files)) \
+	  $(foreach r,$(ldbl-128ibm-routines) $(ldbl-tests), \
+		    $(objpfx)$(r)$(suf)): \
+  sysdep-CFLAGS := $(filter-out -mabi=ieeelongdouble,$(sysdep-CFLAGS))