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@@ -55,3 +55,15 @@ first.
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See https://ccache.samba.org/manual.html#_compiling_in_different_directories[the
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See https://ccache.samba.org/manual.html#_compiling_in_different_directories[the
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ccache manual's section on "Compiling in different directories"] for
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ccache manual's section on "Compiling in different directories"] for
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more details about this rewriting of absolute paths.
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more details about this rewriting of absolute paths.
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+
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+When +ccache+ is enabled in Buildroot using the +BR2_CCACHE=y+ option:
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+
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+* +ccache+ is used during the Buildroot build itself
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+
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+* +ccache+ is not used when building outside of Buildroot, for example
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+ when directly calling the cross-compiler or using the SDK
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+
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+One can override this behavior using the +BR2_USE_CCACHE+ environment
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+variable: when set to +1+, usage of ccache is enabled (default during
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+the Buildroot build), when unset or set to a value different from +1+,
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+usage of ccache is disabled.
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Thomas Petazzoni