Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -2,7 +2,13 @@
 
 include(CheckSymbolExists)
 
-project(test-suite C CXX)
+option(TEST_SUITE_FORTRAN "Enable Fortran test suite" OFF)
+
+if (NOT TEST_SUITE_FORTRAN)
+  project(test-suite C CXX)
+else()
+  project(test-suite C CXX Fortran)
+endif()
 
 function(append value)
   foreach(variable ${ARGN})
@@ -21,6 +27,9 @@
 # On the other hand we often want to switch compiler or cflags
 mark_as_advanced(CLEAR CMAKE_C_COMPILER CMAKE_CXX_COMPILER CMAKE_LINKER
   CMAKE_C_FLAGS CMAKE_CXX_FLAGS CMAKE_EXE_LINKER_FLAGS)
+if (TEST_SUITE_FORTRAN)
+    mark_as_advanced(CLEAR CMAKE_Fortran_COMPILER)
+endif()
 
 # The files in cmake/caches often want to pass along additional flags to select
 # the target architecture. Note that you should still use
@@ -29,6 +38,9 @@
    "Extra flags to select target architecture.")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${TEST_SUITE_ARCH_FLAGS}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TEST_SUITE_ARCH_FLAGS}")
+if (TEST_SUITE_FORTRAN)
+  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${TEST_SUITE_ARCH_FLAGS}")
+endif()
 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${TEST_SUITE_ARCH_FLAGS}")
 
 set(LLVM_CODESIGNING_IDENTITY "" CACHE STRING
@@ -153,12 +165,16 @@
 # LNT to gather data, for examples -ftime-report, or -mllvm -stats. This way
 # the user specified CMAKE_C_FLAGS etc. need not be changed.
 set(TEST_SUITE_DIAGNOSE_FLAGS CACHE STRING
-   "Extra flags appended to CMAKE_C_FLAGS + CMAKE_CXX_FLAGS")
+   "Extra flags appended to CMAKE_C_FLAGS + CMAKE_CXX_FLAGS + CMAKE_Fortran_FLAGS")
 set(TEST_SUITE_DIAGNOSE_LINKER_FLAGS CACHE STRING
     "Extra flags appended to CMAKE_EXE_LINKER_FLAGS")
 mark_as_advanced(TEST_SUITE_DIAGNOSE_FLAGS TEST_SUITE_DIAGNOSE_LINKER_FLAGS)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${TEST_SUITE_DIAGNOSE_FLAGS}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TEST_SUITE_DIAGNOSE_FLAGS}")
+if (TEST_SUITE_FORTRAN)
+  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${TEST_SUITE_DIAGNOSE_FLAGS}")
+endif()
+
 set(CMAKE_EXE_LINKER_FLAGS
     "${CMAKE_EXE_LINKER_FLAGS} ${TEST_SUITE_DIAGNOSE_LINKER_FLAGS}")
 
@@ -172,12 +188,26 @@
 # specifies CMAKE_C_FLAGS and similar.
 set(TEST_SUITE_EXTRA_C_FLAGS CACHE STRING "Extra flags for CMAKE_C_FLAGS")
 set(TEST_SUITE_EXTRA_CXX_FLAGS CACHE STRING "Extra flags for CMAKE_CXX_FLAGS")
+if (TEST_SUITE_FORTRAN)
+  set(TEST_SUITE_EXTRA_Fortran_FLAGS CACHE STRING "Extra flags for CMAKE_Fortran_FLAGS")
+endif()
+
 set(TEST_SUITE_EXTRA_EXE_LINKER_FLAGS CACHE STRING
     "Extra flags for CMAKE_EXE_LINKER_FLAGS")
+
 mark_as_advanced(TEST_SUITE_EXTRA_C_FLAGS, TEST_SUITE_EXTRA_CXX_FLAGS,
                  TEST_SUITE_EXTRA_EXE_LINKER_FLAGS)
+
+if (TEST_SUITE_FORTRAN)
+  mark_as_advanced(TEST_SUITE_EXTRA_Fortran_FLAGS TEST_SUITE_EXTRA_EXE_LINKER_FLAGS)
+endif()
+
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${TEST_SUITE_EXTRA_C_FLAGS}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TEST_SUITE_EXTRA_CXX_FLAGS}")
+if (TEST_SUITE_FORTRAN)
+  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${TEST_SUITE_EXTRA_Fortran_FLAGS}")
+endif()
+
 set(CMAKE_EXE_LINKER_FLAGS
     "${CMAKE_EXE_LINKER_FLAGS} ${TEST_SUITE_EXTRA_EXE_LINKER_FLAGS}")
 
Index: SingleSource/UnitTests/CMakeLists.txt
===================================================================
--- SingleSource/UnitTests/CMakeLists.txt
+++ SingleSource/UnitTests/CMakeLists.txt
@@ -55,4 +55,9 @@
   list(REMOVE_ITEM Source matrix-types-spec.cpp)
 endif()
 
+# Fortran
+if (TEST_SUITE_FORTRAN)
+  add_subdirectory(Fortran)
+endif()
+
 llvm_singlesource()
Index: SingleSource/UnitTests/Fortran/CMakeLists.txt
===================================================================
--- /dev/null
+++ SingleSource/UnitTests/Fortran/CMakeLists.txt
@@ -0,0 +1,3 @@
+file(GLOB Source RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.f90 *.F90 *.f *.F)
+
+llvm_singlesource()
Index: SingleSource/UnitTests/Fortran/hello.f90
===================================================================
--- /dev/null
+++ SingleSource/UnitTests/Fortran/hello.f90
@@ -0,0 +1,3 @@
+program hello
+  print *, 'Hello world'
+end program hello
Index: SingleSource/UnitTests/Fortran/hello.reference_output
===================================================================
--- /dev/null
+++ SingleSource/UnitTests/Fortran/hello.reference_output
@@ -0,0 +1,2 @@
+ Hello world
+exit 0
Index: cmake/modules/SingleMultiSource.cmake
===================================================================
--- cmake/modules/SingleMultiSource.cmake
+++ cmake/modules/SingleMultiSource.cmake
@@ -33,7 +33,7 @@
   if(DEFINED Source)
     set(sources ${Source})
   else()
-    file(GLOB sources *.c *.cpp *.cc)
+    file(GLOB sources *.c *.cpp *.cc *.f *.F *.f90 *.F90)
   endif()
   foreach(source ${sources})
     basename(name ${source})
@@ -51,7 +51,7 @@
 function(llvm_multisource target)
   set(sources ${ARGN})
   if(NOT sources)
-    file(GLOB sources *.c *.cpp *.cc)
+    file(GLOB sources *.c *.cpp *.cc *.f *.F *.f90 *.F90)
   endif()
 
   llvm_test_executable_no_test(${target} ${sources})