lbrycrd/depends/README.md

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### Usage
To build dependencies for the current arch+OS:
make
To build for another arch/OS:
make HOST=host-platform-triplet
For example:
make HOST=x86_64-w64-mingw32 -j4
A prefix will be generated that's suitable for plugging into Bitcoin's
configure. In the above example, a dir named x86_64-w64-mingw32 will be
created. To use it for Bitcoin:
./configure --prefix=`pwd`/depends/x86_64-w64-mingw32
Common `host-platform-triplets` for cross compilation are:
- `i686-w64-mingw32` for Win32
- `x86_64-w64-mingw32` for Win64
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- `x86_64-apple-darwin14` for macOS
- `arm-linux-gnueabihf` for Linux ARM 32 bit
- `aarch64-linux-gnu` for Linux ARM 64 bit
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- `riscv32-linux-gnu` for Linux RISC-V 32 bit
- `riscv64-linux-gnu` for Linux RISC-V 64 bit
No other options are needed, the paths are automatically configured.
### Install the required dependencies: Ubuntu & Debian
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#### For macOS cross compilation
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sudo apt-get install curl librsvg2-bin libtiff-tools bsdmainutils cmake imagemagick libcap-dev libz-dev libbz2-dev python-setuptools
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#### For Win32/Win64 cross compilation
- see [build-windows.md](../doc/build-windows.md#cross-compilation-for-ubuntu-and-windows-subsystem-for-linux)
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#### For linux (including i386, ARM) cross compilation
Common linux dependencies:
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sudo apt-get install make automake cmake curl g++-multilib libtool binutils-gold bsdmainutils pkg-config python3
For linux ARM cross compilation:
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sudo apt-get install g++-arm-linux-gnueabihf binutils-arm-linux-gnueabihf
For linux AARCH64 cross compilation:
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sudo apt-get install g++-aarch64-linux-gnu binutils-aarch64-linux-gnu
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For linux RISC-V 64-bit cross compilation (there are no packages for 32-bit):
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sudo apt-get install g++-riscv64-linux-gnu binutils-riscv64-linux-gnu
RISC-V known issue: gcc-7.3.0 and gcc-7.3.1 result in a broken `test_bitcoin` executable (see https://github.com/bitcoin/bitcoin/pull/13543),
this is apparently fixed in gcc-8.1.0.
### Dependency Options
The following can be set when running make: make FOO=bar
SOURCES_PATH: downloaded sources will be placed here
BASE_CACHE: built packages will be placed here
SDK_PATH: Path where sdk's can be found (used by macOS)
FALLBACK_DOWNLOAD_PATH: If a source file can't be fetched, try here before giving up
NO_QT: Don't download/build/cache qt and its dependencies
NO_WALLET: Don't download/build/cache libs needed to enable the wallet
NO_UPNP: Don't download/build/cache packages needed for enabling upnp
DEBUG: disable some optimizations and enable more runtime checking
RAPIDCHECK: build rapidcheck (experimental)
HOST_ID_SALT: Optional salt to use when generating host package ids
BUILD_ID_SALT: Optional salt to use when generating build package ids
If some packages are not built, for example `make NO_WALLET=1`, the appropriate
options will be passed to bitcoin's configure. In this case, `--disable-wallet`.
### Additional targets
download: run 'make download' to fetch all sources without building them
download-osx: run 'make download-osx' to fetch all sources needed for macOS builds
download-win: run 'make download-win' to fetch all sources needed for win builds
download-linux: run 'make download-linux' to fetch all sources needed for linux builds
### Other documentation
- [description.md](description.md): General description of the depends system
- [packages.md](packages.md): Steps for adding packages