COMP: Improve introspection and header configuration

Use CMake capabilities to test if the specified fortran
and C compilers are compatible.  Fail early if they are
determined to be incompatible.

Use CMake capabilities to generate platform specific
header files, If CMake FortranCInterface_HEADER function
fails to identify FortranCInterface_GLOBAL_FOUND or
FortranCInterface_MODULE_FOUND, then fall back to the
statically generated file that is used by Makefiles.

Author: hjmjohnson

CBLAS/CMakeLists.txt

@@ -5,22 +5,18 @@ set(LAPACK_INSTALL_EXPORT_NAME cblas-targets)
 
 # Create a header file cblas.h for the routines called in my C programs
 include(FortranCInterface)
-FortranCInterface_HEADER( ${CMAKE_CURRENT_SOURCE_DIR}/include/cblas_mangling.h 
+## Ensure that the fortran compiler and c compiler specified are compatible
+FortranCInterface_VERIFY()
+FortranCInterface_HEADER( ${LAPACK_BINARY_DIR}/include/cblas_mangling.h 
                           MACRO_NAMESPACE "F77_"
                           SYMBOL_NAMESPACE "F77_" )
+if( NOT FortranCInterface_GLOBAL_FOUND OR NOT FortranCInterface_MODULE_FOUND)
+  message(WARNING "Reverting to pre-defined include/lapacke_mangling.h")
+  configure_file( include/lapacke_mangling_with_flags.h.in
+                  ${LAPACK_BINARY_DIR}/include/lapacke_mangling.h )
+endif ()
 
-# Old way to detect mangling
-#include(FortranMangling)
-#FORTRAN_MANGLING(CDEFS)
-#set(CDEFS ${CDEFS} CACHE STRING "Fortran Mangling" FORCE)
-#MESSAGE(STATUS "=========")
-
-# --------------------------------------------------
-# Compiler Flags
-#ADD_DEFINITIONS( "-D${CDEFS}")
-
-
-include_directories( include )
+include_directories( include ${LAPACK_BINARY_DIR}/include )
 add_subdirectory(include)
 add_subdirectory(src)
 
@@ -32,7 +28,7 @@ endforeach()
 endmacro()
 
 append_subdir_files(CBLAS_INCLUDE "include")
-INSTALL( FILES ${CBLAS_INCLUDE} DESTINATION include )
+INSTALL( FILES ${CBLAS_INCLUDE} ${LAPACK_BINARY_DIR}/include/cblas_mangling.h DESTINATION include )
 
 # --------------------------------------------------
 if(BUILD_TESTING)

CBLAS/include/CMakeLists.txt

@@ -1,3 +1,3 @@
-SET (CBLAS_INCLUDE cblas.h cblas_f77.h cblas_test.h cblas_mangling.h)
+SET (CBLAS_INCLUDE cblas.h cblas_f77.h cblas_test.h )
 
 file(COPY ${CBLAS_INCLUDE} DESTINATION ${LAPACK_BINARY_DIR}/include)

LAPACKE/CMakeLists.txt

@@ -3,21 +3,18 @@ enable_language(C)
 
 set(LAPACK_INSTALL_EXPORT_NAME lapacke-targets)
 
-# Create a header file netlib.h for the routines called in my C programs
+# Create a header file lapacke_mangling.h for the routines called in my C programs
 include(FortranCInterface)
-FortranCInterface_HEADER( ${CMAKE_CURRENT_SOURCE_DIR}/include/lapacke_mangling.h 
-                          MACRO_NAMESPACE "LAPACK_"
-                          SYMBOL_NAMESPACE "LAPACK_" )
-
-# Old way to detect mangling
-#include(FortranMangling)
-#FORTRAN_MANGLING(CDEFS)
-#set(CDEFS ${CDEFS} CACHE STRING "Fortran Mangling" FORCE)
-#MESSAGE(STATUS "=========")
-
-# --------------------------------------------------
-# Compiler Flags
-#ADD_DEFINITIONS( "-D${CDEFS}")
+## Ensure that the fortran compiler and c compiler specified are compatible
+FortranCInterface_VERIFY()
+FortranCInterface_HEADER( ${LAPACK_BINARY_DIR}/include/lapacke_mangling.h 
+    MACRO_NAMESPACE "LAPACK_"
+    SYMBOL_NAMESPACE "LAPACK_" )
+if( NOT FortranCInterface_GLOBAL_FOUND OR NOT FortranCInterface_MODULE_FOUND)
+  message(WARNING "Reverting to pre-defined include/lapacke_mangling.h")
+  configure_file( include/lapacke_mangling_with_flags.h.in
+                  ${LAPACK_BINARY_DIR}/include/lapacke_mangling.h )
+endif ()
 
 if (WIN32 AND NOT UNIX)
  ADD_DEFINITIONS(-DHAVE_LAPACK_CONFIG_H -DLAPACK_COMPLEX_STRUCTURE)
@@ -26,7 +23,7 @@ endif (WIN32 AND NOT UNIX)
 
 get_directory_property( DirDefs COMPILE_DEFINITIONS )
 
-include_directories( include )
+include_directories( include ${LAPACK_BINARY_DIR}/include )
 add_subdirectory(include)
 add_subdirectory(src)
 add_subdirectory(utils)

LAPACKE/include/CMakeLists.txt

@@ -1,3 +1,3 @@
-SET (LAPACKE_INCLUDE lapacke.h lapacke_config.h lapacke_utils.h lapacke_mangling.h)
+SET (LAPACKE_INCLUDE lapacke.h lapacke_config.h lapacke_utils.h )
 
 file(COPY ${LAPACKE_INCLUDE} DESTINATION ${LAPACK_BINARY_DIR}/include)