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[AutotoolsToolchain] Added [CC|CXX]_FOR_BUILD #3750

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Jun 4, 2024
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[AutotoolsToolchain] Added [CC|CXX]_FOR_BUILD #3750

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1d3cb77
Added new env variables info
franramirez688 Jun 4, 2024
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wip
franramirez688 Jun 4, 2024
c57b487
Update reference/tools/gnu/autotoolstoolchain.rst
czoido Jun 4, 2024
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13 changes: 9 additions & 4 deletions reference/tools/gnu/autotoolstoolchain.rst
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Expand Up @@ -53,6 +53,11 @@ corresponding build flags like ``-stdlib=libstdc++``, ``-std=gnu14``, architectu
etc. It will also append the folder where the Conan generators are located to the
``PKG_CONFIG_PATH`` environment variable.

Since `Conan 2.4.0 <https://github.com/conan-io/conan/releases/tag/2.4.0>`__,
if it's a cross-building context, ``CC_FOR_BUILD`` and ``CXX_FOR_BUILD`` are also set as environment variables if the
build profile is defining the ``c`` and ``cpp`` values in the conf variable ``tools.build:compiler_executables``.
See more info in the :ref:`conf section<conan_tools_gnu_autotoolstoolchain_conf>`.
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This generator will also generate a file called ``conanbuild.conf`` containing two keys:

- **configure_args**: Arguments to call the ``configure`` script.
Expand Down Expand Up @@ -241,12 +246,11 @@ Reference
:members:


.. _conan_tools_gnu_autotoolstoolchain_conf:

conf
^^^^

.. _conan_tools_gnu_autotoolstoolchain_conf:

- ``tools.build:cxxflags`` list of extra C++ flags that will be used by ``CXXFLAGS``.
- ``tools.build:cflags`` list of extra of pure C flags that will be used by ``CFLAGS``.
- ``tools.build:sharedlinkflags`` list of extra linker flags that will be used by ``LDFLAGS``.
Expand All @@ -259,8 +263,9 @@ conf
compiler as key and the compiler executable path as value. Those keys will be mapped as
follows:

* ``c``: will set ``CC`` in *conanautotoolstoolchain.sh|bat* script.
* ``cpp``: will set ``CXX`` in *conanautotoolstoolchain.sh|bat* script.
* ``c``: will set ``CC`` (and ``CC_FOR_BUILD`` if cross-building) in *conanautotoolstoolchain.sh|bat* script.
* ``cpp``: will set ``CXX`` (and ``CXX_FOR_BUILD`` if cross-building) in *conanautotoolstoolchain.sh|bat* script.
* ``rc``: will set ``RC`` in *conanautotoolstoolchain.sh|bat* script.
* ``cuda``: will set ``NVCC`` in *conanautotoolstoolchain.sh|bat* script.
* ``fortran``: will set ``FC`` in *conanautotoolstoolchain.sh|bat* script.

Expand Down