airayumi / build-variables

Common variables, such as compiler flags, for building Second Life and its dependencies

Overview

This repository is intended to centralize string data common to many viewer builds (such as required compiler switches), both internal to Linden and external, on TeamCity and on individual dev machines.

Bash Usage

Intended usage is to clone this repository as a sibling to the source directory being built, then use the bash "source" or "." commands to read ../build-variables/convenience into your build script. This gives you shell variables such as

LL_BUILD_RELEASE, LL_BUILD_RELWITHDEBINFO, LL_BUILD_DEBUG

which are aliases for the platform-specific variables (e.g.)

LL_BUILD_LINUX_RELEASE, LL_BUILD_LINUX_RELWITHDEBINFO, LL_BUILD_LINUX_DEBUG

et al.

If you pass a build-type argument (Release, RelWithDebInfo, Debug) when sourcing the convenience script, e.g.:

source ../build-variables/convenience Release

then you get the additional alias LL_BUILD, which (in the example above, assuming you're running on Linux) is the same as LL_BUILD_LINUX_RELEASE.

The functions script (also sourced by convenience) provides bash functions for removing or replacing individual switches from any one of those variables. See the comments in the script for function usage.

Other Languages

Variable Suite

The convenience script sources the variables script, which provides the underlying suite of variables. Variable names are of the form:

LL_BUILD_{platform}_{buildtype}

where:

component	meaning
platform	WINDOWS, DARWIN, LINUX.
buildtype	RELEASE, RELWITHDEBINFO, DEBUG. BASE for switches common to all.

These variables are in turn composed of variables that separate out command-line macro definitions from other kinds of compiler switches:

LL_BUILD_{platform}_{buildtype}_{category}

where:

component	meaning
category	MACROS, SWITCHES.

These are typically aggregated into the corresponding LL_BUILD_{platform}_{buildtype} variables:

LL_BUILD_LINUX_RELEASE="$LL_BUILD_LINUX_RELEASE_SWITCHES $LL_BUILD_LINUX_RELEASE_MACROS"

CMake, in particular, distinguishes between macro definitions (add_definitions()) and other compiler switches (add_compile_options()), so it may be useful to populate those CMake commands from the underlying _MACROS and _SWITCHES variables.

Parsing the variables file

The variables file should be kept as simple as possible to parse, so it can be read from other languages than bash. Refer to the comments in that file itself for syntax rules.