# CMAKE_COMPILER_IS_GNUG77

Deprecated since version 3.24: Use the `CMAKE_Fortran_COMPILER_ID` variable instead.

The `CMAKE_COMPILER_IS_*` variables were used in early CMake versions before the introduction of `CMAKE_<LANG>_COMPILER_ID` variables in CMake 2.6.

The `CMAKE_COMPILER_IS_GNUG77` variable is set to boolean true if the `Fortran` compiler is GNU.

## Examples

In earlier versions of CMake, the `CMAKE_COMPILER_IS_GNUG77` variable was used to check if the `Fortran` compiler was GNU:

    if(CMAKE_COMPILER_IS_GNUG77)
      # GNU Fortran compiler-specific logic.
    endif()

Starting with CMake 2.6, the `CMAKE_Fortran_COMPILER_ID` variable should be used instead:

    if(CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
      # GNU Fortran compiler-specific logic.
    endif()