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Merge topic 'doc-toolchain-file-CMAKE_SOURCE_DIR' into release-3.15

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Merge-request: !3495
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Craig Scott
2019-07-03 19:08:45 +10:00
parent c56201bdac 16434fe303
commit 581e011cef
1 changed files with 8 additions and 0 deletions
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8
Help/manual/cmake-toolchains.7.rst
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@@ -101,6 +101,14 @@ values for the compilers.
The :variable:`CMAKE_CROSSCOMPILING` variable is set to true when CMake is
cross-compiling.
Note that using the :variable:`CMAKE_SOURCE_DIR` or :variable:`CMAKE_BINARY_DIR`
variables inside a toolchain file is typically undesirable. The toolchain
file is used in contexts where these variables have different values when used
in different places (e.g. as part of a call to :command:`try_compile`). In most
cases, where there is a need to evaluate paths inside a toolchain file, the more
appropriate variable to use would be :variable:`CMAKE_CURRENT_LIST_DIR`, since
it always has an unambiguous, predictable value.
Cross Compiling for Linux
-------------------------