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117 lines
4.0 KiB
Plaintext
117 lines
4.0 KiB
Plaintext
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Each recipe consists of 3 main parts: defining identifiers, setting build
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variables, and defining build commands.
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The package "mylib" will be used here as an example
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General tips:
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mylib_foo is written as $(package)_foo in order to make recipes more similar.
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Identifiers:
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Each package is required to define at least these variables:
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$(package)_version:
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Version of the upstream library or program. If there is no version, a
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placeholder such as 1.0 can be used.
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$(package)_download_path:
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Location of the upstream source, without the file-name. Usually http or
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ftp.
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$(package)_file_name:
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The upstream source filename available at the download path.
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$(package)_sha256_hash:
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The sha256 hash of the upstream file
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These variables are optional:
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$(package)_build_subdir:
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cd to this dir before running configure/build/stage commands.
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$(package)_download_file:
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The file-name of the upstream source if it differs from how it should be
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stored locally. This can be used to avoid storing file-names with strange
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characters.
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$(package)_dependencies:
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Names of any other packages that this one depends on.
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$(package)_patches:
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Filenames of any patches needed to build the package
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Build Variables:
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After defining the main identifiers, build variables may be added or customized
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before running the build commands. They should be added to a function called
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$(package)_set_vars. For example:
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define $(package)_set_vars
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...
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endef
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Most variables can be prefixed with the host, architecture, or both, to make
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the modifications specific to that case. For example:
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Universal: $(package)_cc=gcc
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Linux only: $(package)_linux_cc=gcc
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x86_64 only: $(package)_x86_64_cc = gcc
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x86_64 linux only: $(package)_x86_64_linux_cc = gcc
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These variables may be set to override or append their default values.
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$(package)_cc
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$(package)_cxx
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$(package)_objc
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$(package)_objcxx
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$(package)_ar
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$(package)_ranlib
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$(package)_libtool
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$(package)_nm
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$(package)_cflags
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$(package)_cxxflags
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$(package)_ldflags
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$(package)_cppflags
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$(package)_config_env
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$(package)_build_env
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$(package)_stage_env
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The *_env variables are used to add environment variables to the respective
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commands.
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Other variables may be defined as needed.
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Build commands:
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For each build, a unique build dir and staging dir are created. For example,
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work/build/mylib/1.0-1adac830f6e and work/staging/mylib/1.0-1adac830f6e.
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The following build commands are available for each recipe:
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$(package)_fetch_cmds:
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Runs from: build dir
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Fetch the source file. If undefined, it will be fetched and verified
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against its hash.
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$(package)_extract_cmds:
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Runs from: build dir
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Verify the source file against its hash and extract it. If undefined, the
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source is assumed to be a tarball.
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$(package)_preprocess_cmds:
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Runs from: build dir/$(package)_build_subdir
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Preprocess the source as necessary. If undefined, does nothing.
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$(package)_config_cmds:
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Runs from: build dir/$(package)_build_subdir
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Configure the source. If undefined, does nothing.
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$(package)_build_cmds:
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Runs from: build dir/$(package)_build_subdir
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Build the source. If undefined, does nothing.
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$(package)_stage_cmds:
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Runs from: build dir/$(package)_build_subdir
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Stage the build results. If undefined, does nothing.
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The following variables are available for each recipe:
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$(1)_staging_dir: package's destination sysroot path
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$(1)_staging_prefix_dir: prefix path inside of the package's staging dir
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$(1)_extract_dir: path to the package's extracted sources
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$(1)_build_dir: path where configure/build/stage commands will be run
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$(1)_patch_dir: path where the package's patches (if any) are found
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Notes on build commands:
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For packages built with autotools, $($(package)_autoconf) can be used in the
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configure step to (usually) correctly configure automatically. Any
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$($(package)_config_opts) will be appended.
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Most autotools projects can be properly staged using:
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$(MAKE) DESTDIR=$($(package)_staging_dir) install
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