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overview-manual-concepts: Fix the compiler bootstrap process

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gcc-cross-initial and glibc-inital were removed a while ago and this
flow is incorrect anyway. Fix it to match what happens (adding libgcc
and libgcc-initial which are now important in this context).

(From yocto-docs rev: 047bff2b79c7742abc19d549b78c175dd3b5a8f5)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Purdie
2020-11-06 15:50:24 +00:00
parent e949e76d0f
commit a8ec1f72ba
1 changed files with 12 additions and 22 deletions
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34
documentation/overview-manual/overview-manual-concepts.rst
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@@ -1515,27 +1515,24 @@ cross-compiler that is used internally within BitBake only.
gcc-cross
.
The chain of events that occurs when ``gcc-cross`` is bootstrapped is as
follows:
The chain of events that occurs when the standard toolchain is bootstrapped:
::
gcc -> binutils-cross -> gcc-cross-initial -> linux-libc-headers -> glibc-initial -> glibc -> gcc-cross -> gcc-runtime
binutils-cross -> linux-libc-headers -> gcc-cross -> libgcc-initial -> glibc -> libgcc -> gcc-runtime
- ``gcc``: The build host's GNU Compiler Collection (GCC).
- ``gcc``: The compiler, GNU Compiler Collection (GCC).
- ``binutils-cross``: The bare minimum binary utilities needed in order
to run the ``gcc-cross-initial`` phase of the bootstrap operation.
- ``binutils-cross``: The binary utilities needed in order
to run the ``gcc-cross`` phase of the bootstrap operation and build the
headers for the C library.
- ``gcc-cross-initial``: An early stage of the bootstrap process for
creating the cross-compiler. This stage builds enough of the
``gcc-cross``, the C library, and other pieces needed to finish
building the final cross-compiler in later stages. This tool is a
"native" package (i.e. it is designed to run on the build host).
- ``linux-libc-headers``: Headers needed for the cross-compiler and C library build.
- ``linux-libc-headers``: Headers needed for the cross-compiler.
- ``libgcc-initial``: An initial version of the gcc support library needed
to bootstrap ``glibc``.
- ``glibc-initial``: An initial version of the Embedded GNU C Library
(GLIBC) needed to bootstrap ``glibc``.
- ``libgcc``: The final version of the gcc support library which
can only be built once there is a C library to link against.
- ``glibc``: The GNU C Library.
@@ -1543,14 +1540,7 @@ follows:
cross-compiler. This stage results in the actual cross-compiler that
BitBake uses when it builds an image for a targeted device.
.. note::
If you are replacing this cross compiler toolchain with a custom
version, you must replace
gcc-cross
.
This tool is also a "native" package (i.e. it is designed to run on
This tool is a "native" tool (i.e. it is designed to run on
the build host).
- ``gcc-runtime``: Runtime libraries resulting from the toolchain