## Version Information Version Information — Variables and functions to check the GTK+ version |

## Functions

guint | gtk_get_major_version ()
guint | gtk_get_minor_version ()
guint | gtk_get_micro_version ()
guint | gtk_get_binary_age ()
guint | gtk_get_interface_age ()
const gchar * | gtk_check_version ()
#define | GTK_CHECK_VERSION()

## Types and Values

#define | gtk_major_version
#define | gtk_minor_version
#define | gtk_micro_version
#define | gtk_binary_age
#define | gtk_interface_age
#define | GTK_MAJOR_VERSION
#define | GTK_MINOR_VERSION
#define | GTK_MICRO_VERSION
#define | GTK_BINARY_AGE
#define | GTK_INTERFACE_AGE

## Includes

    #include <gtk/gtk.h>

## Description

GTK+ provides version information, primarily useful in configure checks for builds that have a configure script. Applications will not typically use the features described here.

## Functions

### gtk_get_major_version ()

    guint
    gtk_get_major_version (void);

Returns the major version number of the GTK+ library. (e.g. in GTK+ version 3.1.5 this is 3.)

This function is in the library, so it represents the GTK+ library your code is running against. Contrast with the GTK_MAJOR_VERSION macro, which represents the major version of the GTK+ headers you have included when compiling your code.

#### Returns

the major version number of the GTK+ library

Since: 3.0

### gtk_get_minor_version ()

    guint
    gtk_get_minor_version (void);

Returns the minor version number of the GTK+ library. (e.g. in GTK+ version 3.1.5 this is 1.)

This function is in the library, so it represents the GTK+ library your code is are running against. Contrast with the GTK_MINOR_VERSION macro, which represents the minor version of the GTK+ headers you have included when compiling your code.

#### Returns

the minor version number of the GTK+ library

Since: 3.0

### gtk_get_micro_version ()

    guint
    gtk_get_micro_version (void);

Returns the micro version number of the GTK+ library. (e.g. in GTK+ version 3.1.5 this is 5.)

This function is in the library, so it represents the GTK+ library your code is are running against. Contrast with the GTK_MICRO_VERSION macro, which represents the micro version of the GTK+ headers you have included when compiling your code.

#### Returns

the micro version number of the GTK+ library

Since: 3.0

### gtk_get_binary_age ()

    guint
    gtk_get_binary_age (void);

Returns the binary age as passed to `libtool` when building the GTK+ library the process is running against. If `libtool` means nothing to you, don't worry about it.

#### Returns

the binary age of the GTK+ library

Since: 3.0

### gtk_get_interface_age ()

    guint
    gtk_get_interface_age (void);

Returns the interface age as passed to `libtool` when building the GTK+ library the process is running against. If `libtool` means nothing to you, don't worry about it.

#### Returns

the interface age of the GTK+ library

Since: 3.0

### gtk_check_version ()

    const gchar *
    gtk_check_version (guint required_major,
                       guint required_minor,
                       guint required_micro);

Checks that the GTK+ library in use is compatible with the given version. Generally you would pass in the constants GTK_MAJOR_VERSION, GTK_MINOR_VERSION, GTK_MICRO_VERSION as the three arguments to this function; that produces a check that the library in use is compatible with the version of GTK+ the application or module was compiled against.

Compatibility is defined by two things: first the version of the running library is newer than the version `required_major.required_minor` .`required_micro` . Second the running library must be binary compatible with the version `required_major.required_minor` .`required_micro` (same major version.)

This function is primarily for GTK+ modules; the module can call this function to check that it wasn’t loaded into an incompatible version of GTK+. However, such a check isn’t completely reliable, since the module may be linked against an old version of GTK+ and calling the old version of `gtk_check_version()`, but still get loaded into an application using a newer version of GTK+.

#### Parameters

required_major | the required major version |
required_minor | the required minor version |
required_micro | the required micro version |

#### Returns

`NULL` if the GTK+ library is compatible with the given version, or a string describing the version mismatch. The returned string is owned by GTK+ and should not be modified or freed.

[nullable]

### GTK_CHECK_VERSION()

    #define             GTK_CHECK_VERSION(major,minor,micro)

Returns `TRUE` if the version of the GTK+ header files is the same as or newer than the passed-in version.

#### Parameters

major | major version (e.g. 1 for version 1.2.5) |
minor | minor version (e.g. 2 for version 1.2.5) |
micro | micro version (e.g. 5 for version 1.2.5) |

#### Returns

`TRUE` if GTK+ headers are new enough

## Types and Values

### gtk_major_version

    #define gtk_major_version gtk_get_major_version ()

### gtk_minor_version

    #define gtk_minor_version gtk_get_minor_version ()

### gtk_micro_version

    #define gtk_micro_version gtk_get_micro_version ()

### gtk_binary_age

    #define gtk_binary_age gtk_get_binary_age ()

### gtk_interface_age

    #define gtk_interface_age gtk_get_interface_age ()

### GTK_MAJOR_VERSION

    #define GTK_MAJOR_VERSION (3)

Like `gtk_get_major_version()`, but from the headers used at application compile time, rather than from the library linked against at application run time.

### GTK_MINOR_VERSION

    #define GTK_MINOR_VERSION (22)

Like `gtk_get_minor_version()`, but from the headers used at application compile time, rather than from the library linked against at application run time.

### GTK_MICRO_VERSION

    #define GTK_MICRO_VERSION (18)

Like `gtk_get_micro_version()`, but from the headers used at application compile time, rather than from the library linked against at application run time.

### GTK_BINARY_AGE

    #define GTK_BINARY_AGE    (2218)

Like `gtk_get_binary_age()`, but from the headers used at application compile time, rather than from the library linked against at application run time.

### GTK_INTERFACE_AGE

    #define GTK_INTERFACE_AGE (18)

Like `gtk_get_interface_age()`, but from the headers used at application compile time, rather than from the library linked against at application run time.