diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host
index ec7b6924ee..0926560885 100644
--- a/package/gcc/Config.in.host
+++ b/package/gcc/Config.in.host
@@ -39,6 +39,8 @@ config BR2_GCC_VERSION_4_9_X
 	depends on !(BR2_TOOLCHAIN_USES_MUSL && (BR2_powerpc64 || BR2_powerpc64le))
 	# musl mips64 unsupported
 	depends on !(BR2_TOOLCHAIN_USES_MUSL && (BR2_mips64 || BR2_mips64el))
+	# glibc >= 2.26 needs gcc >= 6.2
+	depends on !(BR2_TOOLCHAIN_USES_GLIBC && BR2_powerpc64le)
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 
 config BR2_GCC_VERSION_5_X
@@ -53,6 +55,8 @@ config BR2_GCC_VERSION_5_X
 	depends on !BR2_mips_interaptiv && !BR2_mips_m5150 && !BR2_mips_i6400
 	# musl mips64 unsupported
 	depends on !(BR2_TOOLCHAIN_USES_MUSL && (BR2_mips64 || BR2_mips64el))
+	# glibc >= 2.26 needs gcc >= 6.2
+	depends on !(BR2_TOOLCHAIN_USES_GLIBC && BR2_powerpc64le)
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_5
 
 config BR2_GCC_VERSION_6_X
diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk
index 49ccccf56f..54ef70c91c 100644
--- a/package/gcc/gcc.mk
+++ b/package/gcc/gcc.mk
@@ -254,6 +254,14 @@ HOST_GCC_COMMON_CONF_OPTS += \
 	--without-long-double-128
 endif
 
+# Since glibc >= 2.26, poerpc64le requires double/long double which
+# requires at least gcc 6.2.
+# See sysdeps/powerpc/powerpc64le/configure.ac
+ifeq ($(BR2_TOOLCHAIN_USES_GLIBC)$(BR2_TOOLCHAIN_GCC_AT_LEAST_6)$(BR2_powerpc64le),yyy)
+HOST_GCC_COMMON_CONF_OPTS += \
+	--with-long-double-128
+endif
+
 HOST_GCC_COMMON_TOOLCHAIN_WRAPPER_ARGS += -DBR_CROSS_PATH_SUFFIX='".br_real"'
 ifeq ($(BR2_GCC_ARCH_HAS_CONFIGURABLE_DEFAULTS),)
 ifeq ($(call qstrip,$(BR2_GCC_TARGET_CPU_REVISION)),)