package/gcc: enable float128 on powerpc64le with glibc >= 2.26 toolchains

float128 is now required on powerpc64le with glibc >= 2.26 toolchains.

Fixes:
running configure fragment for sysdeps/gnu
running configure fragment for sysdeps/powerpc/powerpc64le
checking if [...]powerpc64le-buildroot-linux-gnu-gcc supports binary128 floating point type... no
checking if the target machine is at least POWER8... yes
configure: error: ***  binary128 floating point type (GCC >= 6.2) is required on powerpc64le.

In order to prepare the glibc bump to this version, we enable
binary128 floating point in gcc. This require at least gcc >= 6.2.

Disable gcc 4.x and 5.x for internal toolchain.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host
index ec7b6924eed9fc2aa6bc070f3c51d8f33bc3b984..09265608850fb581f49a753f14bcbf95161b16d6 100644 (file)
--- 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 49ccccf56ff5349da4e01de8a94c77decd6f80d6..54ef70c91cea3927b85d624590ff0f946e869f7d 100644 (file)
--- 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)),)