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Makefile: Compile lib/utils sources separately for each platform

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Currently, if same build directory is used to compile two different
platforms then lib/utils objects are shared for these platforms.

We will be having platform specific configs to enable/disable drivers
in lib/utils and select compile time options for lib/utils sources.
This means lib/utils sources will now be compiled in a platform
specific way.

To tackle above, we update top-level Makefile as follows:
1) Don't create libsbiutils.a anymore because this can't be shared
   between platforms.
2) Compile lib/utils sources separately for each platform.
3) Add comments showing which make rules are for lib/sbi, lib/utils,
   firmware, and platform sources.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel
2022-08-08 09:33:14 +05:30
committed by Anup Patel
parent 662e631cce
commit de80e9337d
3 changed files with 26 additions and 30 deletions
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6
docs/library_usage.md
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@@ -8,11 +8,7 @@ OpenSBI provides two types of static libraries:
hooks for the execution of this interface must be provided by the firmware or
bootloader linking with this library. This library is installed as
*<install_directory>/lib/libsbi.a*
2. *libsbiutils.a* - A static library that will contain all common code required
by any platform supported in OpenSBI. It will be built by default and included
in libplatsbi.a. This library is installed as
*<install_directory>/lib/libsbiutils.a*.
3. *libplatsbi.a* - An example platform-specific static library integrating
2. *libplatsbi.a* - An example platform-specific static library integrating
*libsbi.a* with platform-specific hooks. This library is available only for
the platforms supported by OpenSBI. This library is installed as
*<install_directory>/platform/<platform_subdir>/lib/libplatsbi.a*