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Fix issues with removing try_compile input file. 

- Don't remove input file
- Put output in ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}
- Remove try_compile variable from the cache after using
This commit is contained in:
Todd Gamblin 2011-06-21 14:02:01 -07:00
parent e00d2c4d51
commit 8756e77fb4
1 changed files with 12 additions and 8 deletions
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20
Modules/FindMPI.cmake
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@ -443,10 +443,14 @@ function (interrogate_mpi_compiler lang try_libs)
endfunction() endfunction()
# This function attempts to compile with the regular compiler, to see if MPI programs
# work with it. This is a last ditch attempt after we've tried interrogating mpicc and
# friends, and after we've tried to find generic libraries. Works on machines like
# Cray XE6, where the modules environment changes what MPI version cc, CC, and ftn use.
function(try_regular_compiler lang success) function(try_regular_compiler lang success)
# last ditch attempt: just try to compile something with the regular compiler set(scratch_directory ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY})
if (${lang} STREQUAL Fortran) if (${lang} STREQUAL Fortran)
set(test_file ${CMAKE_CURRENT_BINARY_DIR}/cmake_mpi_test.f90) set(test_file ${scratch_directory}/cmake_mpi_test.f90)
file(WRITE ${test_file} file(WRITE ${test_file}
"program hello\n" "program hello\n"
"include 'mpif.h'\n" "include 'mpif.h'\n"
@ -456,9 +460,9 @@ function(try_regular_compiler lang success)
"end\n") "end\n")
else() else()
if (${lang} STREQUAL CXX) if (${lang} STREQUAL CXX)
set(test_file ${CMAKE_CURRENT_BINARY_DIR}/cmake_mpi_test.cpp) set(test_file ${scratch_directory}/cmake_mpi_test.cpp)
else() else()
set(test_file ${CMAKE_CURRENT_BINARY_DIR}/cmake_mpi_test.c) set(test_file ${scratch_directory}/cmake_mpi_test.c)
endif() endif()
file(WRITE ${test_file} file(WRITE ${test_file}
"#include <mpi.h>\n" "#include <mpi.h>\n"
@ -467,8 +471,8 @@ function(try_regular_compiler lang success)
" MPI_Finalize();\n" " MPI_Finalize();\n"
"}\n") "}\n")
endif() endif()
try_compile(worked ${CMAKE_CURRENT_BINARY_DIR} ${test_file}) try_compile(compiler_has_mpi ${scratch_directory} ${test_file})
if (worked) if (compiler_has_mpi)
set(MPI_${lang}_NO_INTERROGATE ${CMAKE_${lang}_COMPILER} CACHE STRING "Whether to interrogate MPI ${lang} compiler" FORCE) set(MPI_${lang}_NO_INTERROGATE ${CMAKE_${lang}_COMPILER} CACHE STRING "Whether to interrogate MPI ${lang} compiler" FORCE)
set(MPI_${lang}_COMPILER ${CMAKE_${lang}_COMPILER} CACHE STRING "MPI ${lang} compiler" FORCE) set(MPI_${lang}_COMPILER ${CMAKE_${lang}_COMPILER} CACHE STRING "MPI ${lang} compiler" FORCE)
set(MPI_${lang}_COMPILE_FLAGS "" CACHE STRING "MPI ${lang} compilation flags" FORCE) set(MPI_${lang}_COMPILE_FLAGS "" CACHE STRING "MPI ${lang} compilation flags" FORCE)
@ -476,8 +480,8 @@ function(try_regular_compiler lang success)
set(MPI_${lang}_LINK_FLAGS "" CACHE STRING "MPI ${lang} linking flags" FORCE) set(MPI_${lang}_LINK_FLAGS "" CACHE STRING "MPI ${lang} linking flags" FORCE)
set(MPI_${lang}_LIBRARIES "" CACHE STRING "MPI ${lang} libraries to link against" FORCE) set(MPI_${lang}_LIBRARIES "" CACHE STRING "MPI ${lang} libraries to link against" FORCE)
endif() endif()
set(${success} ${worked} PARENT_SCOPE) set(${success} ${compiler_has_mpi} PARENT_SCOPE)
file(REMOVE ${test_file}) unset(compiler_has_mpi CACHE)
endfunction() endfunction()
# End definitions, commence real work here. # End definitions, commence real work here.