allwpilib/toolchains/linux.gradle

model {
    toolChains {
        gcc(Gcc) {
            target('x86') {
                cppCompiler.withArguments { args ->
                    args << '-std=c++11' << '-Wformat=2' << '-Wall' << '-Wextra' << '-Werror' << '-pedantic'
                    args << '-Wno-psabi' << '-Wno-unused-parameter' << '-fPIC' << '-rdynamic'
                    //TODO: When the compiler allows us to actually call deprecated functions from within
                    // deprecated function, remove this line (this will cause calling deprecated functions
                    // to be treated as a warning rather than an error).
                    args << '-Wno-error=deprecated-declarations' << '-pthread'
                    args << '-m32'
                }
                linker.withArguments { args ->
                    args << '-rdynamic' << '-pthread'
                    args << '-m32'
                }
            }
            target('x64') {
                cppCompiler.withArguments { args ->
                    args << '-std=c++11' << '-Wformat=2' << '-Wall' << '-Wextra' << '-Werror' << '-pedantic'
                    args << '-Wno-psabi' << '-Wno-unused-parameter' << '-fPIC' << '-rdynamic'
                    //TODO: When the compiler allows us to actually call deprecated functions from within
                    // deprecated function, remove this line (this will cause calling deprecated functions
                    // to be treated as a warning rather than an error).
                    args << '-Wno-error=deprecated-declarations' << '-pthread'
                }
                linker.withArguments { args ->
                    args << '-rdynamic' << '-pthread'
                }
            }
        }
    }
}

ext.setupReleaseDefines = { cppCompiler, linker ->
    cppCompiler.args '-O2', '-g'
}

ext.setupDebugDefines = { cppCompiler, linker ->
    cppCompiler.args '-g', '-O0'
}

// Used only on Windows.
ext.setupDef = { linker, deffile -> }

ext.debugStripSetup = {
    if (!project.hasProperty('debug')) {
        project.tasks.whenObjectAdded { task ->
            if (task.name.contains('link') && task.name.contains('SharedLibrary')) {
                def library = task.outputFile.absolutePath
                def debugLibrary = task.outputFile.absolutePath + ".debug"
                task.doLast {
                    exec { commandLine "objcopy", '--only-keep-debug', library, debugLibrary }
                    exec { commandLine "strip", '-g', library }
                    exec { commandLine "objcopy", "--add-gnu-debuglink=$debugLibrary", library }
                }
            }
        }
    }
}

ext.checkNativeSymbols = { getSymbolFunc ->
    project.tasks.whenObjectAdded { task ->
        if (task.name.contains('link') && task.name.contains('SharedLibrary')) {
            def library = task.outputFile.absolutePath
            task.doLast {
                def nmOutput = new ByteArrayOutputStream()
                exec { 
                    commandLine "nm", library
                    standardOutput nmOutput
                }
                // Remove '\r' so we can check for full string contents
                String nmSymbols = nmOutput.toString().replace('\r', '')

                def symbolList = getSymbolFunc()
                symbolList.each {
                    //Add \n so we can check for the exact symbol
                    def found = nmSymbols.contains(it + '\n')
                    if (!found) {
                        throw new GradleException("Found a definition that does not have a matching symbol ${it}")
                    }
                }
            }
        }
    }
}