From 047480058c47a60e0437c5bc1b4759f2490668cc Mon Sep 17 00:00:00 2001 From: Angus Gratton Date: Tue, 25 Aug 2020 17:04:18 +1000 Subject: [PATCH 1/2] idf.py: Disable CMake --warn-uninitialized option by default Can still be enabled by passing --cmake-warn-uninitialized on the command line Prevents CMake warnings printed by default if IDF_PATH is underneath the CMake project directory. The reason for this is that CMake --warn-uninitialized only enables checks inside the project directory (ie top-level CMakeLists.txt directory and subdirectories), it doesn't enable for files included from other directories. (The only way to enable warnings in other directories is to pass --check-system-dirs and this looks like it's only useful for CMake's own developers as it prints a lot of warnings from inside CMake otherwise - see https://gitlab.kitware.com/cmake/cmake/-/issues/19645 ) Plan to follow up with a later commit to clean up most of the warnings (which aren't problems for CMake execution), but we'll also disable this option by default to avoid this unexpected triggering of IDF warnings. --- docs/en/api-guides/build-system.rst | 1 + tools/idf.py | 8 +++++--- 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/docs/en/api-guides/build-system.rst b/docs/en/api-guides/build-system.rst index fc2c7f21d3..38e943a729 100644 --- a/docs/en/api-guides/build-system.rst +++ b/docs/en/api-guides/build-system.rst @@ -111,6 +111,7 @@ To list all available options, run ``idf.py --help``. Note that some older versions of CCache may exhibit bugs on some platforms, so if files are not rebuilt as expected then try disabling ccache and build again. CCache can be enabled by default by setting the ``IDF_ENABLE_CCACHE`` environment variable to a non-zero value. - ``-v`` flag causes both ``idf.py`` and the build system to produce verbose build output. This can be useful for debugging build problems. +- ``--cmake-warn-uninitialized`` (or ``-w``) will cause CMake to print uninitialized variable warnings inside the project directory (not for directories not found inside the project directory). This only controls CMake variable warnings inside CMake itself, not other types of build warnings. This option can also be set permanently by setting the ``IDF_CMAKE_WARN_UNINITIALIZED`` environment variable to a non-zero value. Using CMake Directly -------------------- diff --git a/tools/idf.py b/tools/idf.py index ce37a6cec8..bba2ac12c2 100755 --- a/tools/idf.py +++ b/tools/idf.py @@ -242,7 +242,7 @@ def _ensure_build_directory(args, always_run_cmake=False): "-DPYTHON_DEPS_CHECKED=1", "-DESP_PLATFORM=1", ] - if not args.no_warnings: + if args.cmake_warn_uninitialized: cmake_args += ["--warn-uninitialized"] cmake_args += ["-DWARN_UNINITIALIZED=1"] @@ -998,8 +998,10 @@ def init_cli(): "default": None, }, { - "names": ["-n", "--no-warnings"], - "help": "Disable Cmake warnings.", + "names": ["-w/-n", "--cmake-warn-uninitialized/--no-warnings"], + "help": ("Enable CMake uninitialized variable warnings for CMake files inside the project directory. " + "(--no-warnings is now the default, and doesn't need to be specified.)"), + "envvar": "IDF_CMAKE_WARN_UNINITIALIZED", "is_flag": True, "default": False, }, From cad6eda3812b30327501b46fe09a4ecb8224554a Mon Sep 17 00:00:00 2001 From: Victor Lamoine Date: Tue, 18 Aug 2020 22:59:36 +0200 Subject: [PATCH 2/2] Fix ccache documentation: environment variable is IDF_CCACHE_ENABLE Merges https://github.com/espressif/esp-idf/pull/5753 --- docs/en/api-guides/build-system.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/en/api-guides/build-system.rst b/docs/en/api-guides/build-system.rst index 38e943a729..6d80ae271a 100644 --- a/docs/en/api-guides/build-system.rst +++ b/docs/en/api-guides/build-system.rst @@ -109,7 +109,7 @@ To list all available options, run ``idf.py --help``. - ``-B `` allows overriding the build directory from the default ``build`` subdirectory of the project directory. - ``--ccache`` flag can be used to enable CCache_ when compiling source files, if the CCache_ tool is installed. This can dramatically reduce some build times. -Note that some older versions of CCache may exhibit bugs on some platforms, so if files are not rebuilt as expected then try disabling ccache and build again. CCache can be enabled by default by setting the ``IDF_ENABLE_CCACHE`` environment variable to a non-zero value. +Note that some older versions of CCache may exhibit bugs on some platforms, so if files are not rebuilt as expected then try disabling ccache and build again. CCache can be enabled by default by setting the ``IDF_CCACHE_ENABLE`` environment variable to a non-zero value. - ``-v`` flag causes both ``idf.py`` and the build system to produce verbose build output. This can be useful for debugging build problems. - ``--cmake-warn-uninitialized`` (or ``-w``) will cause CMake to print uninitialized variable warnings inside the project directory (not for directories not found inside the project directory). This only controls CMake variable warnings inside CMake itself, not other types of build warnings. This option can also be set permanently by setting the ``IDF_CMAKE_WARN_UNINITIALIZED`` environment variable to a non-zero value.