Mac OS install issues: cmake error

[tbainesUA]

Hello, I am trying to install Multinest onto Mac OS, following the instructions on the documentation page. I made sure to install the library dependencies using mac ports.

I have even set the following, suggested by another that has previously help someone else setup multinest on mac os in the past by adding:

export FC=/opt/local/bin/mpif90-openmpi-gcc9
export CC=/opt/local/bin/mpicc-openmpi-gcc9
export CXX=/opt/local/bin/mpicxx-openmpi-gcc9
export FFLAGS="-O3 -DMPI -m64 -ffree-line-length-none -fbounds-check -Wsurprising -g"
export CFLAGS="-O3 -DMPI -m64"

I was succesfully able to down load the software via cloning the Multinest repo but when I attemped to install it and error occurred at the cmake .. step which resulted in the following:

CMake Error in src/CMakeLists.txt:
  A logical block opening on the line

    ~/software/MultiNest/src/CMakeLists.txt:35 (if)

  is not closed.

It looks like a syntax issue, however when inspecting the line at where the error occur, I was unable to identify the error.

lines 30 - 43 of src/CMakeList.txt:

# Find required packages
FIND_PACKAGE(LAPACK REQUIRED)

# If we are compiling with gfortran, add -ffree-line-length-none
foreach(lang C CXX Fortran)
    if(CMAKE_${lang}_COMPILER_ID STREQUAL GNU)
        MESSAGE(STATUS "Detected gfortran, adding -ffree-line-length-none compiler flag.")
        set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -ffree-line-length-none")
        if(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 10)
            MESSAGE(STATUS "Detected gfortran >= 10, adding -std=legacy compiler flag.")
            set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -std=legacy")
        break()
    endif()
endforeach()

Any help would be great, thanks for your time.

[JohannesBuchner]

This is caused by a recent pull request: JohannesBuchner/MultiNest#2

[tbainesUA]

Follow up, did a git pull of the of the Multinest repo for the updated CMakeLists.txt then retried cmake .. and it no longer prompted the error above. However, i ran into an error as the following:

CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):

  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


CMake Deprecation Warning at src/CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- Detected gfortran, adding -ffree-line-length-none compiler flag.
-- Found MPI_C: /opt/local/bin/mpicc-openmpi-gcc9 (found version "3.1") 
-- Found MPI_CXX: /opt/local/bin/mpicxx-openmpi-gcc9 (found version "3.1") 
-- Found MPI_Fortran: /opt/local/bin/mpif90-openmpi-gcc9 (found version "3.1") 
-- Found MPI: TRUE (found version "3.1")  
CMake Deprecation Warning at src/example_ackley/CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


CMake Deprecation Warning at src/example_eggbox_C/CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


CMake Error at src/example_eggbox_C/CMakeLists.txt:7 (FIND_LIBRARY):
  Could not find m using the following names:


-- Configuring incomplete, errors occurred!
See also "/Users/tbaines1/software/MultiNest/build/CMakeFiles/CMakeOutput.log".
See also "/Users/tbaines1/software/MultiNest/build/CMakeFiles/CMakeError.log".

The CMakeError.log file outputted the following:

Determining if the Fortran sgemm exists failed with the following output:
Change Dir: /Users/tbaines1/software/MultiNest/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_81dad/fast && /Library/Developer/CommandLineTools/usr/bin/make  -f CMakeFiles/cmTC_81dad.dir/build.make CMakeFiles/cmTC_81dad.dir/build
Building Fortran object CMakeFiles/cmTC_81dad.dir/testFortranCompiler.f.o
/opt/local/bin/mpif90-openmpi-gcc9   -O3 -DMPI -m64 -ffree-line-length-none -fbounds-check -Wsurprising -g  -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk -mmacosx-version-min=10.15 -c /Users/tbaines1/software/MultiNest/build/CMakeFiles/CMakeTmp/testFortranCompiler.f -o CMakeFiles/cmTC_81dad.dir/testFortranCompiler.f.o
Linking Fortran executable cmTC_81dad
/opt/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_81dad.dir/link.txt --verbose=1
/opt/local/bin/mpif90-openmpi-gcc9 -O3 -DMPI -m64 -ffree-line-length-none -fbounds-check -Wsurprising -g  -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk -mmacosx-version-min=10.15 CMakeFiles/cmTC_81dad.dir/testFortranCompiler.f.o -o cmTC_81dad 
Undefined symbols for architecture x86_64:
  "_sgemm_", referenced from:
      _main in testFortranCompiler.f.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
make[1]: *** [cmTC_81dad] Error 1
make: *** [cmTC_81dad/fast] Error 2



Determining if the Fortran sgemm exists failed with the following output:
Change Dir: /Users/tbaines1/software/MultiNest/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_cab6c/fast && /Library/Developer/CommandLineTools/usr/bin/make  -f CMakeFiles/cmTC_cab6c.dir/build.make CMakeFiles/cmTC_cab6c.dir/build
Building Fortran object CMakeFiles/cmTC_cab6c.dir/testFortranCompiler.f.o
/opt/local/bin/mpif90-openmpi-gcc9   -O3 -DMPI -m64 -ffree-line-length-none -fbounds-check -Wsurprising -g  -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk -mmacosx-version-min=10.15 -c /Users/tbaines1/software/MultiNest/build/CMakeFiles/CMakeTmp/testFortranCompiler.f -o CMakeFiles/cmTC_cab6c.dir/testFortranCompiler.f.o
Linking Fortran executable cmTC_cab6c
/opt/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_cab6c.dir/link.txt --verbose=1
/opt/local/bin/mpif90-openmpi-gcc9 -O3 -DMPI -m64 -ffree-line-length-none -fbounds-check -Wsurprising -g  -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk -mmacosx-version-min=10.15 CMakeFiles/cmTC_cab6c.dir/testFortranCompiler.f.o -o cmTC_cab6c  -Wl,-rpath,/Users/tbaines1/opt/anaconda3/lib /Users/tbaines1/opt/anaconda3/lib/libmkl_intel_lp64.dylib /Users/tbaines1/opt/anaconda3/lib/libmkl_intel_thread.dylib /Users/tbaines1/opt/anaconda3/lib/libmkl_core.dylib /Users/tbaines1/opt/anaconda3/lib/libiomp5.dylib -lm -ldl 
ld: file not found: @rpath/libiomp5.dylib for architecture x86_64
collect2: error: ld returned 1 exit status
make[1]: *** [cmTC_cab6c] Error 1
make: *** [cmTC_cab6c/fast] Error 2

Thanks

[JohannesBuchner]

Be sure to clean your build/ folder completely whenever you change something.

[tbainesUA]

After cleaning the build folder, I was able to successfully execute cmake .. and make with no issues.