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<h2>Configurable Options for Compiler</h2>
Compiler has a --config option to take a configuration file in HDF format, and
it has a --config-value to take ad-hoc configurable options in HDF format.
This documentation describes what's available for both of them.
When in doubt, look for how these options are parsed in compiler/options.cpp.
= AllDynamic
Default is false. When turned on, all functions and methods can be invoked
dynamically even without a literal string. When turned off, some dynamic
function calls may fail, if compiler is not able to tell that function may be
invoked dynamically. Recommend to turn on this switch.
= AllVolatile
Default is false. When turned on, order-dependent function or class declaration
vs. existence testing can work. When turned off, some function_exists(),
class_exists(), get_defined_functions() or get_declared_classes() may return
different results than PHP does. Most programs don't have dependencies on their
behaviors, so this is recommended to leave as off.
= EnableEval
Default is 0, eval() will throw a fatal error. When 1, eval() is supported in
a limited way, mixed together with compiled program. When 2, eval() is fully
supported as an interpreter mode.
= IncludeRoots
Only needed when --input-list is not used, and --parse-on-demand is turned on.
In this case, compiler needs to understand every single include. Currently it
only understands these formats (compiler/analysis/dependency_graph.cpp),
include 'literal_file_path';
include $SOME_VARIABLE . 'literal_file_path';
IncludeRoots is designed to look up $SOME_VARIABLE in the second case, so to
resolve file paths at compilation time. It will look like this,
IncludeRoots {
* {
path = lib/
* {
path = lib/another
= AutoloadRoots
Only needed when --input-list is not used, and --parse-on-demand is turned on.
In this case, compiler needs to understand all autoloads to find a class file.
It will look like this,
AutoloadRoots {
* {
path = lib/thrift/packages
With the above configuration, whenever a class name is added to the array,
$GLOBALS['THRIFT_AUTOLOAD'][] = 'myclass';
It will be searched against the specified path. Please note that, this is
not a good way to work around the problem. --include-list is recommended to
specify all class files explicitly. Then this option isn't needed.
= IncludeSearchPaths
Only needed when --input-list is not used, and --parse-on-demand is turned on.
Specifies more paths to search for include files. For example,
IncludeSearchPaths {
* = lib/thrift/packages
* = lib/common
= PackageDirectories
Add all PHP files under these directories. For example,
PackageDirectories {
* = lib/thrift/packages
* = lib/common
= PackageExcludeDirs
Exclude file under these directories. Same as --exclude-dir command line
option. For example,
PackageExcludeDirs {
* = scripts/
* = tests/
= PackageExcludeFiles
Exclude these files. Same as --exclude-file command line option. For example,
PackageExcludeFiles {
* = scripts/delete_user.php
* = tests/create_database.php
= PackageExcludeStaticFiles
Exclude files matching these patterns from static file content cache. A static
content cache creates one single file from all static contents, including
css, js, html, images and other MIME format files. When building static
content cache, the compiler will look for all non-PHP files to try to include
them. This option allows one to exclude certain files. Same as
--exclude-static-pattern command line option. For example,
PackageExcludeStaticFiles {
* = .*\\.js
* = .*\\.css
= CachePHPFile
Default is false. Whether to include PHP files in static content cache.
= ScalarArrayFileCount
Default is 1. Scalar arrays are arrays with scalar values, including literal
strings, numbers and scalar arrays as keys and values, so their values are
entirely determined at compilation time. We pre-generate these arrays during
program startup time just once to avoid initialization costs. These scalar
arrays are groups into their own files. This option specifies how many files
to generate or split up scalar arrays, so we can compile them faster. For
large project with a lot of scalar arrays, use a higher value. Then each file
is smaller. When using distcc, normally it finishes compilation faster.
= ScalarArrayOverflowLimit
Default is 2000. Some scalar arrays can become extremely large when nested
with lots of elements and levels. This option controls how to split them up
into small ones, having sub-arrays defined by their own, so to flatten array
data structure for faster compilation.
= LiteralStringFileCount
Default is 1. Similar to scalar arrays, we have literal strings pre-generated
in files. This option specifies how many of these files are generated for
faster compilation.
= RTTIOutputFile
Still under development, but this option specifies where to store runtime
type information collected by RTTI profiler. We intend to use this information
to compile better code, similar to g++'s PGO.
= EnableHipHopSyntax
Default is false. Enables new syntax, including yield, new type names for
function parameter, function return and class variable type hints (string,
int, boolean, etc..), new array types (vector, map, set).
= EnableHipHopExperimentalSyntax
Default is false. Enables experimental syntax, including type hints for local
variables and global variables.
= EnableShortTags
Default is true. Is &lt;? allowed with PHP code?
= EnableAspTags
Default is false. Is &lt;% %&gt; allowed with PHP code?
= EnableXHP
Whether to enable XHP extension. XHP adds some syntax sugar to allow better and
safer HTML templating. For more information, search XHP.
= NativeXHP
Whether to use HPHP to directly handle XHP.
= ParserThreadCount
How many threads to use when parsing PHP files. By default, it's 2x CPU count.
= FlibDirectory
Facebook specific. Ignore.
= GenerateCppLibCode
Default is false. When turned on, it will generate better C++ code to be used
as C++ libraries, including better class methods and doc comments.
= GenerateSourceInfo
Default is false. Source info is a map from locations in C++ files to those in
PHP files. It can be used to translate C++ stacktrace to more readable PHP
stacktrace. When FrameInjection enabled, there is no need to do stacktrace
translation any more, so this option is by default set to false to save space.
= GenerateDocComments
Default is true. Whether to store doc comments in class map, so they can be
queried from reflection.
= PregenerateCPP
Default is false. In case clustering of output files has been requested and this
option is set to true, the files are pre-generated in memory in order to perform
a more precise partitioning.
= GCCOptimization
Default is disabled. This option allows to selectively decrease the compiler
optimization level for long functions. It is specified as:
GCCOptimization {
O2 = X
O1 = Y
O0 = Z
where X, Y, Z are the minimum length functions must have (measured as line
count) for their optimization level to be decreased respectively to O2, O1,
O0. Note that all these parameters are optional, so it is possible for example
to only specify O1 and O0 but not O2, meaning that O2 will never be used as an
optimization level. In general it is expected that if specified, the minimum
line counts will be increasing for a decreasing optimization level.
= DynamicFunctionPrefix
Deprecating. These are options for specifying which functions may be called
dynamically. This turned out to be hard to configure, and it's replaced by
= DynamicFunctionPostfix
Deprecating. These are options for specifying which functions may be called
dynamically. This turned out to be hard to configure, and it's replaced by
= DynamicMethodPrefix
Deprecating. These are options for specifying which methods may be called
dynamically. This turned out to be hard to configure, and it's replaced by
= DynamicInvokeFunctions
Deprecating. These are options for specifying which functions may be called
dynamically. This turned out to be hard to configure, and it's replaced by
= CodeGeneration
Under "CodeGeneration", one can specify alternative name prefixes that are
used in different places of code generation.
- IdPrefix
- LabelEscape
- LambdaPrefix
- FunctionPrefix
- BuiltinFunctionPrefix
- InvokePrefix
- CreateObjectPrefix
- PseudoMainPrefix
- VariablePrefix
- GlobalVariablePrefix
- StaticVariablePrefix
- ScalarArrayName
- SystemScalarArrayName
- ClassPrefix
- ClassStaticsPrefix
- ClassStaticsObjectPrefix
- ClassStaticsCallbackPrefix
- ClassStaticsIdGetterPrefix
- ClassStaticInitializerPrefix
- ClassStaticInitializerFlagPrefix
- ClassWrapperFunctionPrefix
- ObjectPrefix
- ObjectStaticPrefix
- SmartPtrPrefix
- MethodPrefix
- MethodWrapperPrefix
- MethodImplPrefix
- PropertyPrefix
- StaticPropertyPrefix
- ConstantPrefix
- ClassConstantPrefix
- ExceptionPrefix
- TempVariablePrefix
- EvalOrderTempPrefix
- SilencerPrefix
- EvalInvokePrefix
- TempPrefix
- MapPrefix
- IterPrefix
- InitPrefix
- FFIFnPrefix
- SystemFilePrefix
- UserFilePrefix
- ClassHeaderPrefix
- ClusterPrefix
- FFIFilePrefix
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