Build time compiler is stored in shiboken2 binary

[hmaarrfk]

Solution to issue cannot be found in the documentation.

• [X] I checked the documentation.

Issue

shiboken2 seems to store the build time compiler as the "forced default".

This makes it impossible to override the compiler as would be needed for cross compilation.

#if defined(Q_CC_CLANG) || defined(Q_CC_GNU)
static QString compilerFromCMake(const QString &defaultCompiler)
{
// Added !defined(Q_OS_DARWIN) due to PYSIDE-1032
#  if defined(CMAKE_CXX_COMPILER) && !defined(Q_OS_DARWIN)
    Q_UNUSED(defaultCompiler)
    return QString::fromLocal8Bit(CMAKE_CXX_COMPILER);
#  else
    return defaultCompiler;
#  endif
}
#endif // Q_CC_CLANG, Q_CC_GNU

sources/shiboken2/ApiExtractor/clangparser/compilersupport.cpp

Installed packages

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Environment info

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[hmaarrfk]

In the 5.15.5 build

$ grep -R "/home/conda/feedstock_root/build_artifacts/pyside2_1657204180233/_build_env/bin/x86_64-conda-linux-gnu-c++" ~/mambaforge/pkgs/pyside2-5.15.5-py39hbfe2af7_1
grep: /home/mark/mambaforge/pkgs/pyside2-5.15.5-py39hbfe2af7_1/bin/shiboken2: binary file matches

And in the 5.15.6 build

$ grep -R /home/conda/feedstock_root/build_artifacts/pyside2_1662903640412/_build_env/bin/x86_64-conda-linux-gnu-c++ ~/mambaforge/pkgs/pyside2-5.15.6-py39hbfe2af7_0
grep: /home/mark/mambaforge/pkgs/pyside2-5.15.6-py39hbfe2af7_0/bin/shiboken2: binary file matches

[hmaarrfk]

https://bugreports.qt.io/browse/PYSIDE-2057