Revert "configs: common: enable c++11 thread support via c11 threads"

This reverts commit 8dee616 because it
causes incompatibility with prior Zephyr releases which we do not want
at this point.

The relevant GCC patches should be reworked to be more self-contained
and maintain compatibility with prior Zephyr releases as noted in the
GitHub issue #751.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

configs/aarch64-zephyr-elf.config

@@ -5,4 +5,4 @@ CT_ARCH_64=y
 CT_TARGET_VENDOR="zephyr"
 CT_TARGET_CFLAGS="-moverride=tune=no_ldp_stp_qregs -ftls-model=local-exec"
 CT_MULTILIB=y
-CT_GDB_CROSS_EXTRA_CONFIG_ARRAY="--enable-targets=arm-zephyr-eabi --enable-threads=c11 --enable-libstdcxx-time=c11 --enable-libstdcxx-threads"
+CT_GDB_CROSS_EXTRA_CONFIG_ARRAY="--enable-targets=arm-zephyr-eabi"

configs/common.config

@@ -15,11 +15,8 @@ CT_GDB_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/gdb"
 # GCC
 CT_GCC_SRC_CUSTOM=y
 CT_GCC_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/gcc"
-# NOTE: --enable-threads=c11 is still necessary here to override the value inherited by
-# build/cc/gcc.sh with baremetal "mode"
-CT_CC_GCC_EXTRA_CONFIG_ARRAY="--with-gnu-ld --with-gnu-as --enable-initfini-array --enable-threads=c11 --enable-libstdcxx-time=c11 --enable-libstdcxx-threads"
+CT_CC_GCC_EXTRA_CONFIG_ARRAY="--with-gnu-ld --with-gnu-as --enable-initfini-array"
 CT_CC_LANG_CXX=y
-CT_THREADS_C11=y
 
 # Newlib
 CT_NEWLIB_SRC_CUSTOM=y

configs/x86_64-zephyr-elf.config

@@ -6,4 +6,4 @@ CT_TARGET_VENDOR="zephyr"
 CT_TARGET_CFLAGS="-ftls-model=local-exec"
 CT_MULTILIB=y
 CT_BINUTILS_EXTRA_CONFIG_ARRAY="--enable-targets=x86_64-pep"
-CT_CC_GCC_EXTRA_CONFIG_ARRAY="--with-gnu-ld --with-gnu-as --enable-initfini-array --with-cpu-32=i586 --with-arch-32=i586 --with-cpu-64=generic --with-arch-64=x86-64  --enable-threads=c11 --enable-libstdcxx-time=c11 --enable-libstdcxx-threads"
+CT_CC_GCC_EXTRA_CONFIG_ARRAY="--with-gnu-ld --with-gnu-as --enable-initfini-array --with-cpu-32=i586 --with-arch-32=i586 --with-cpu-64=generic --with-arch-64=x86-64"