• rez 是什么?
• 包管理是什么

• wsl2 安装开发

• cmake / python 基础知识推荐视频
• rp 中的 cmake / python 基本套路

什么是pkg-config

简单理解，pkg-config根据.pc结尾的文件做依赖配置。 找到.pc文件周，解析其内容，然后对底层构建工具（C/C++编译器、链接器）或高层构建工具（automake?, cmake）提供具体配置项目。

通常是在POSIX系统（Linux，MacOS等）使用pkg-config，解决第三方依赖项配置问题。

近些年来随着CMake的越发流行，原本用pkg-config的很多软件包提供了cmake的配置作为替代；少部分仍然提供.pc文件作为兼容考虑；还有另外一小部分的软件包，即使基于cmake构建了，对外提供依赖配置时仍然只有.pc文件。

这就导致一个问题：虽然我学会了cmake在大部分时候都能解决依赖问题，但个别格楞子软件包还是要用pkg-config来搞。

Building Packages

rez包可以使用rez-build工具来构建和本地安装。这个工具有以下操作：

• 遍历一个包的变体
• 构建环境
• 在此环境中运行构建系统

每一个构建都来自构建的目录路径。（通常是构建的子目录或构建下的变体特定子目录） 例如一个包含两个基本python变体的程序包：

ENV cmake

Operator to read environment variables.

Use the syntax $ENV{VAR} to read environment variable VAR.

To test whether an environment variable is defined, use the signature if(DEFINED ENV{<name>}) of the if() command.

See the set() and unset() commands to see how to write or remove environment variables.

CMAKE_PREFIX_PATH

Semicolon-separated list of directories specifying installation prefixes to be searched by the find_package(), find_program(), find_library(), find_file(), and find_path() commands. Each command will add appropriate subdirectories (like bin, lib, or include) as specified in its own documentation.

By default this is empty. It is intended to be set by the project.

Build Environment Variables

https://github.com/AcademySoftwareFoundation/rez/wiki/Environment-Variables

These are variables that rez generates within a build environment, in addition to those listed here.

• REZ_BUILD_ENV - Always present in a build, has value 1.
• REZ_BUILD_INSTALL - Has a value of 1 if an installation is taking place (either a rez-build -i or rez-release), otherwise 0.
• REZ_BUILD_INSTALL_PATH - Installation path, if an install is taking place.
• REZ_BUILD_PATH - Path where build output goes.
• REZ_BUILD_PROJECT_DESCRIPTION - Equal to the description attribute of the package being built.
• REZ_BUILD_PROJECT_FILE - The filepath of the package being built (typically a package.py file).
• REZ_BUILD_PROJECT_NAME - Name of the package being built.
• REZ_BUILD_PROJECT_VERSION - Version of the package being built.
• REZ_BUILD_REQUIRES - Space-separated list of requirements for the build - comes from the current package’s requires, build_requires and private_build_requires attributes, including the current variant’s requirements.
• REZ_BUILD_REQUIRES_UNVERSIONED - Equivalent but unversioned list to REZ_BUILD_REQUIRES.
• REZ_BUILD_SOURCE_PATH - Path containing the package.py file.
• REZ_BUILD_THREAD_COUNT - Number of threads being used for the build.
• REZ_BUILD_TYPE - One of local or central. Value is central if a release is occurring.
• REZ_BUILD_VARIANT_INDEX - Zero-based index of the variant currently being built. For non-varianted packages, this is “0”.
• REZ_BUILD_VARIANT_REQUIRES - Space-separated list of runtime requirements of the current variant. This does not include the common requirements as found in REZ_BUILD_REQUIRES. For non-varianted builds, this is an empty string.

• REZ_BUILD_VARIANT_SUBPATH - Subdirectory containing the current variant. For non-varianted builds, this is an empty string.

• tbb 包生成
• 测试 tbb
  • target 名字是 TBB::tbb，可以在 kazen\packages\tbb\2021.2.0\platform-linux\arch-x86_64\lib\cmake\TBB\TBBTargets.cmake

• embree3
• 测试 embree 3 功能

• tinyobjloader
• 测试 tinyobjloader 功能

• vfx platform 介绍