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This is a downstream only patch for RHEL 7.
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See bug 1790475 for the history behind --disable-bind-now for ppc64.
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In summary: COPY relocations and BIND_NOW are incompatible on ppc64.
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The solution is to globally disable BIND_NOW hardening on ppc64 with
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--disable-bind-now and then use a downstream-only patch to partially
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enable BIND_NOW hardening for ppc64 to the level of hardening that
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works given the toolchain.
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diff --git a/sysdeps/powerpc/Makefile b/sysdeps/powerpc/Makefile
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index b11edd77bd2c22d4..47a9e7bcf66a8531 100644
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--- a/sysdeps/powerpc/Makefile
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+++ b/sysdeps/powerpc/Makefile
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@@ -1,3 +1,29 @@
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+################################################################################
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+# Only enabled if we are not building for ppc64le.
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+ifeq (,$(filter %le,$(config-machine)))
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+# Enable bind-now behaviour by default for POWER. This is a downstream specific
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+# change that is required due to a toolchain limitation in handling COPY
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+# relocations and BIND_NOW (see rhbz#1790475).
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+LDCFLAGS-c.so += -Wl,-z,now
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+# Likewise. Take care that this is carefully selected to turn BIND_NOW back on
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+# for ld.so without turning it back on for libpthread.so which has the
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+# problematic OPD that generates a COPY relocation. Enable these only for the
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+# elf subdir which is also used to build libc.so.6. This avoids enabling
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+# BIND_NOW for libpthread.
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+ifeq ($(subdir),elf)
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+z-now-no = -Wl,-z,now
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+LDFLAGS-lib.so += -Wl,-z,now
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+link-extra-flags += -Wl,-z,now
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+endif
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+# Likewise. Take care that this is carefully selected to turn BIND_NOW
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+# back on for iconv modules to ensure the data-only DSOs have consistently the
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+# correct expected flags for DSOs (even if they don't really need them).
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+ifeq ($(subdir),iconvdata)
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+LDFLAGS.so += -Wl,-z,now
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+endif
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+endif
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+################################################################################
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+
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ifeq ($(subdir),string)
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CFLAGS-memcmp.c += -Wno-uninitialized
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endif
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