Undo gcc-12 instead of gcc-11.

3rdparty/find_dependencies.cmake

@@ -1363,6 +1363,7 @@ if(BUILD_GUI)
                              llvm-8/lib
                              llvm-7/lib
                 )
+                file(REAL_PATH ${CPPABI_LIBRARY} CPPABI_LIBRARY)
                 get_filename_component(CLANG_LIBDIR ${CPPABI_LIBRARY} DIRECTORY)
                 string(REGEX MATCH "llvm-([0-9]+)/lib" _ ${CLANG_LIBDIR})
                 set(LIBCPP_VERSION ${CMAKE_MATCH_1})
@@ -1384,7 +1385,7 @@ if(BUILD_GUI)
             if (LIBCPP_VERSION GREATER 11)
                 message(WARNING "libc++ (LLVM) version ${LIBCPP_VERSION} > 11 includes libunwind that " 
                 "interferes with the system libunwind.so.8 and may crash Python code when exceptions "
-                "are used. Please consider using libc++ v11.")
+                "are used. Please consider using libc++ (LLVM) v11.")
             endif()
         endif()
         if (APPLE)

docker/Dockerfile.ci

@@ -68,8 +68,6 @@ RUN if [ "${BUILD_SYCL_MODULE}" = "ON" ]; then \
     fi
 
 # Dependencies: basic and python-build
-# gcc-11 causes a seg fault in tensormap when built in Release mode. Upgrade to
-# gcc-12 instead.
 RUN apt-get update && apt-get install -y \
     git  \
     wget \
@@ -89,11 +87,6 @@ RUN apt-get update && apt-get install -y \
     libxmlsec1-dev \
     libffi-dev \
     liblzma-dev \
- && if c++ --version | grep -F ' 11.' ; then \
-        apt-get install -y g++-12 \
-        && update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++-12 100 \
-        && c++ --version; \
-    fi \
  && rm -rf /var/lib/apt/lists/*
 
 # pyenv or Intel Python

util/install_deps_ubuntu.sh

@@ -39,24 +39,22 @@ eval $(
     echo DISTRIB_ID="$DISTRIB_ID";
     echo DISTRIB_RELEASE="$DISTRIB_RELEASE"
 )
+# To avoid dependence on libunwind, we don't want to use clang / libc++ versions later than 11.
+# Ubuntu 20.04's has versions 8, 10 or 12 while Ubuntu 22.04 has versions 11 and later.
 if [ "$DISTRIB_ID" == "Ubuntu" -a "$DISTRIB_RELEASE" == "20.04" ]; then
-    # To avoid dependence on libunwind, we don't want to use  clang / libc++ versions later than 11.
-    # Ubuntu 20.04's has versions 8, 10 or 12 while Ubuntu 22.04 has versions 11 and later.
     deps=("${deps[@]/clang/clang-10}")
     deps=("${deps[@]/libc++-dev/libc++-10-dev}")
     deps=("${deps[@]/libc++abi-dev/libc++abi-10-dev}")
 fi
 if [ "$DISTRIB_ID" == "Ubuntu" -a "$DISTRIB_RELEASE" == "22.04" ]; then
-    # To avoid dependence on libunwind, we don't want to use  clang / libc++ versions later than 11.
-    # Ubuntu 20.04's has versions 8, 10 or 12 while Ubuntu 22.04 has versions 11 and later.
     deps=("${deps[@]/clang/clang-11}")
     deps=("${deps[@]/libc++-dev/libc++-11-dev}")
     deps=("${deps[@]/libc++abi-dev/libc++abi-11-dev}")
 fi
 
 # Special case for ARM64
 if [ "$(uname -m)" == "aarch64" ]; then
-    # For compling LAPACK in OpenBLAS
+    # For compiling LAPACK in OpenBLAS
     deps+=("gfortran")
 fi