On 18/2/22 16:36, Paolo Bonzini wrote:
On 2/18/22 02:46, Richard Henderson wrote:
I don't have gobjc/g++ installed, so ./configure defaulted to Clang to
compile these languages, but compiled C files using GCC. At the end
the
Clang linker is used (the default c++ symlink).
This is another form of compiler mis-configuration.
If you don't have g++ to go with gcc, use --cxx=false to avoid picking
up a different compiler.
This would be the kind of problem that this test is trying to cover:
if do_cxx $CXXFLAGS $EXTRA_CXXFLAGS $CONFIGURE_CXXFLAGS
$QEMU_CXXFLAGS -o $TMPE $TMPCXX $TMPO $QEMU_LDFLAGS; then
# C++ compiler $cxx works ok with C compiler $cc
:
else
echo "C++ compiler $cxx does not work with C compiler $cc"
echo "Disabling C++ specific optional code"
cxx=
fi
In the past it detected issues with libasan/libtsan incompatibilities.
We should either add a test for atomic operations, or just drop the
test.
We shouldn't assume gcc is GCC:
$ c++ --version
Apple clang version 13.0.0 (clang-1300.0.29.30)
Target: arm64-apple-darwin21.3.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
$ g++ --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr
--with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 13.0.0 (clang-1300.0.29.30)
Target: arm64-apple-darwin21.3.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
$ gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr
--with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 13.0.0 (clang-1300.0.29.30)
Target: arm64-apple-darwin21.3.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
$ clang --version
Apple clang version 13.0.0 (clang-1300.0.29.30)
Target: arm64-apple-darwin21.3.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
