46 lines
1.4 KiB
Plaintext
46 lines
1.4 KiB
Plaintext
Customizing the toolchain
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-------------------------
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[[toolchain-custom]]
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There are three distinct types of toolchain backend supported in Buildroot,
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available under the menu +Toolchain+, invoking +make menuconfig+.
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Using the external toolchain backend
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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There is no way of tuning an external toolchain since Buildroot does not
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generate it.
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It also requires to set the Buildroot settings according to the toolchain ones
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(see xref:external-toolchain[]).
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Using the internal Buildroot toolchain backend
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The internal Buildroot toolchain backend *only* allows to generate
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*http://www.uclibc.org/[uClibc]-based toolchains*.
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However, it allows to tune major settings, such as:
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* Linux header version
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* http://www.uclibc.org/[uClibc] configuration (see xref:uclibc-custom[uClibc])
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* Binutils, GCC, Gdb and toolchain options
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This is directly available after selecting the +Buildroot toolchain+ type in
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the menu +Toolchain+.
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Using the Crosstool-NG backend
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The http://crosstool-ng.org[crosstool-NG] toolchain backend enables a rather
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limited set of settings under the Buildroot +Toolchain+ menu (ie. when invoking
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+make menuconfig+); mostly:
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* The http://crosstool-ng.org[crosstool-NG] configuration file
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* Gdb and some toolchain options
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Then, the toolchain can be finely tuned invoking +make ctng-menuconfig+.
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