Predefined macros compiler for mac

In this example, cxx and cxxflags are make variables. Predefined macros are also used extensively within makes implicit rules. Their values are the major version, minor version, and patch level of the compiler, as integer constants. If you specify the expmac option but omit the source option, the compiler issues a warning message, and does not produce a source listing. The implementation also supports several more microsoftspecific preprocessor macros. Please send updatescorrections to predefcontribute. A prominent example is the lclwidgettype, which is defined by the package lcl and allows to choose the widget set carbon, gtk, qt, win32, wince. Direct use of these platform macros is discouraged, as they dont always contribute to the futureproofing of your code. Gnu make prefers to call them variables, but most unix make utilities call them macros. They act like predefined macros, but you cannot undefine them. Must be included from notice that android is based on linux, and that. Using predefined preprocessor symbols for intel mkl version. They are available with the same meanings regardless of the machine or operating system on which you are using gnu c or gnu fortran. For visual studio compiler there no any possibility get predefined macros from command line.

These macros provide information about toolchain version numbers and compiler options. The compiler supports the predefined macros listed in the table below. If you want to use the expmac option, you must also specify the source compiler option to generate a source listing. I was hoping to do this at compile time to save some code space but i can do it at run time if need be.

Im trying to detect the compiler used to compile my source code. The target platform api is machbased including nextstep and macos 10. Note the following information when using this option. Variables or macros in the gnu make utility dummies. These macros are defined by all gnu compilers that use the c preprocessor. Please note that not all compilers defines these macros, e. When the ansi option, or any std option that requests strict conformance, is given to the compiler, all the systemspecific predefined macros outside the reserved namespace are suppressed.

Predefined compiler macros browse files at joinlogin. Collectively, these macros are known as predefined compiler macros, and are used in abseil. The c166 compiler provides you with predefined constants to use in preprocessor directives and c code for more portable programs. You can use a number of predefined macros to detect apple systems and mac os x in particular.

There are no such macros predefined by osx compilers, but they may be defined by specific project makefiles and platformdetector scripts like. Dec 16, 2019 preprocessor symbols macros substitute values in a program before it is compiled. These macros are in addition to the ansi predefined macros. You can alter the values of these variables in the makefile, with arguments to make, or in the environment to alter how the implicit rules work without redefining the rules themselves. Conceptual information and tips about porting unix and linux applications to os x. The compiler predefines certain global identifiers, known as manifest constants. Predefined compiler macros wiki compilers sourceforge. The recipes in builtin implicit rules make liberal use of certain predefined variables. This option has no effect unless preprocessed output is generated. Overview of predefined compiler macros for standards, compilers, operating systems, and hardware architectures. We dont need to provide a definition to use these macros.

Predefined compiler macros wiki operatingsystems sourceforge. You can force the objectivec compiler to be used for a. Using the k switch to make the default character unsigned causes this macro to. Cdt allows for comfortable environment with code highlighting, navigation, content assist and static analysis. I can easily find predefined macros to check for msvc or gcc see for. We are slowly phasing out all predefined macros which are outside the reserved namespace.

The substitution is performed in the preprocessing phase. Using predefined macros eliminates the need to edit makefiles when the underlying compilation environment changes. Generic macros, of which at least one is defined on a unix compliant platform. I was wondering if there were any predefined macros that indicated whether the chip is using an external crystal based on the configuration bit settings. When compiling third party sources, it might be necessary to temporarily disable some warnings. The cx51 compiler provides the following predefined constants you may use in preprocessor directives and c code to create portable programs. These pages lists various predefined compiler macros that can be used to identify standards, compilers, operating systems, hardware architectures, and even basic runtime libraries at compiletime. Instead, unity defines several helper macros in hlslsupport. Defined only in compilers that support cross compiling with a target of mac osx. For example, if youre writing a shader that checks for d3d11, you may want to ensure that, in the future, the check is extended to include vulkan. Sep 11, 2007 plist compiler, a property list compiler for xcode plist compiler lets you build localized and nonlocalized plist files from plc and ploc source files. Unity s platform dependent compilation feature consists of some preprocessor directives that let you partition your scripts a piece of code that allows you to create your own components, trigger game events, modify component properties over time and respond to user input in any way you like. To generate a list of all predefined macros that the compiler knows about, this.

For example, if we want to use a generic or opaque pointer type, we use void pointers. This macro is defined when your code is being compiled by the objectivec compiler. Some macros are defined only for specific build environments or compiler options. Where the value field is empty, the symbol is only defined. Macros also provide access to the cflags macro and other flags macros for supplying compiler options from the command line. Conditionals are rules allowing to set macros depending on the target platform andor other macros. These pages lists various predefined compiler macros that can be used to identify standards. Notice that the macros indicates the mentioned version or higher. The parallel macros, inside the reserved namespace, remain defined. They are available with the same meanings regardless of the machine or operating system on which you are using gnu c. When it runs the preprocessor, it does so with these macros predefined. It is a script that you execute as a shell script build phase within your xcode project and which takes care of generating automatically the property list files for your packaged applications, bundles, frameworks, plugins, etc.