From 5acaac7122945c7588cf2328d928e1d4fb6488dd Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Thu, 10 Aug 2023 06:32:52 +0200 Subject: [PATCH] package/gcc: fix powerpc toolchain issues with 64-bit capable cores Some of the powerpc CPUs supported by Buildroot are dual mode CPUs, which means 32 Bit and 64 Bit mode is supported, and for any 64-bit capable CPU, GCC defaults to using 64-bit, even if the toolchain tuple starts with powerpc-* (and not powerpc64-*). This causes issues when building toolchains with uClibc or musl. In order to resolve this, we force GCC to understand we want to generate 32-bit code, using the --with-cpu-32 option. See here the gcc documentation for details about --with-cpu-32: https://gcc.gnu.org/install/configure.html See here for a discussion on the musl mailinglist about the error: https://inbox.vuxu.org/musl/20220722162900.GB1320090@port70.net/ Fixes: - http://autobuild.buildroot.net/results/450/4509d8cfb7d99beb4ef023f170490def1d90f92c - http://autobuild.buildroot.net/results/654/6545a464d49f9f3c6740a5208cfad7f09ec4cb8b - http://autobuild.buildroot.net/results/cf8/cf866d5320b069eb1e8b4f05e8e58de0ad2ec7b5 Signed-off-by: Waldemar Brodkorb Signed-off-by: Thomas Petazzoni --- package/gcc/gcc.mk | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk index 1ecbf7e9b4..3050229176 100644 --- a/package/gcc/gcc.mk +++ b/package/gcc/gcc.mk @@ -225,9 +225,17 @@ endif ifneq ($(GCC_TARGET_FP32_MODE),) HOST_GCC_COMMON_CONF_OPTS += --with-fp-32="$(GCC_TARGET_FP32_MODE)" endif + +# musl/uClibc-ng does not work with biarch powerpc toolchains, we +# need to configure gcc explicitely for 32 Bit for CPU's supporting +# 64 Bit and 32 Bit ifneq ($(GCC_TARGET_CPU),) +ifeq ($(BR2_powerpc),y) +HOST_GCC_COMMON_CONF_OPTS += --with-cpu-32=$(GCC_TARGET_CPU) +else HOST_GCC_COMMON_CONF_OPTS += --with-cpu=$(GCC_TARGET_CPU) endif +endif ifneq ($(GCC_TARGET_FPU),) HOST_GCC_COMMON_CONF_OPTS += --with-fpu=$(GCC_TARGET_FPU)