How may I supply the qt5 configure script with the path to the C++ compiler I wish to use?

1r536qvi

I'd like to use a different path to my C++ compiler, but the configure script doesn't seem to honor the CXX env var. How may I achieve that?

SGaist

Hi and welcome to devnet,

Which OS are you on ?
Which compiler is that ?
How are you calling configure ?

1r536qvi

@SGaist Thanks! I'm on Linux, the compiler is a freshly compiled GCC.
This is how I call configure:
CC='/path/to/gcc' CXX='/path/to/g++' /path/to/configure args. The make output still shows it using the regular g++.

Edit: I've checked out 5.15.2. I cant post it properly because of the reputation block.

SGaist

Which version of Qt are you trying to build ?

1r536qvi

@SGaist I've checked out 5.15.2. Sorry for the late relpy, I lack the reputation to post faster.

SGaist

One possible way is to create a custom makspec that makes use of your particular GCC build.

KH-219Design

Just to build on @SGaist 's remarks, some info regarding what Qt has named mkspecs:

https://doc.qt.io/qt-5/configure-options.html#compiler-options