[CMake] Fortran+CXX project with CMake 2.2.2

[Karl Merkley]

>> I am running the Darwin 2.2.2 version downloaded from www.cmake.org.
>>
>> I have a simple CMakeLists.txt where I want to combine C++ and 
>> FORTRAN.
>>
>> PROJECT(add_fortran FORTRAN)
>> ADD_EXECUTABLE(add_fortran main.cpp testf1.f)
>>
>> When I execute cmake I get the following errors.
>>
>>  . . .
>> "/Users/kgmerk/projects/cmake_fortran/build/CMakeTmp/ 
>> testFortranCompiler.f".  TRY_COMPILE only works for enabled 
>> languages.
>> Currently enabled languages are: FORTRAN
>> See PROJECT command for help enabling other languages.
>> -- Check for working Fortran compiler: g77 -- broken
>> The Fortran compiler "g77" is not able to compile a simple test 
>> program.
>> It fails with the following output:
>>
On Nov 9, 2005, at 7:00 PM, William A. Hoffman wrote:

> It should be :
>
> PROJECT(add_fortran Fortran)
>
Just for archival purposes, here is the CMakeLists.txt that actually 
works.  I also added a test to make sure both .f and .F extensions were 
handled correctly.

# The project must specify all languages that are being used in the 
project
PROJECT(add_fortran CXX Fortran)
ADD_EXECUTABLE(add_fortran main.cpp testf1.F testf2.f)

# You must which linker to use for a multiple language project
SET_TARGET_PROPERTIES(add_fortran PROPERTIES LINKER_LANGUAGE CXX)

# You need to find and link with libg2c (I _think_ this applies only if 
you are using g77)
FIND_PATH(G2C_DIR libg2c.a /opt/local/lib)
LINK_DIRECTORIES(${G2C_DIR})
TARGET_LINK_LIBRARIES(add_fortran g2c)