FortranCInt: Pass CONFIG flags to try_compile

This change ensures that Intel Fortran's /libs: in
CMAKE_Fortran_FLAGS and Visual C++'s /MT or /MD in the
CMAKE_C_FLAGS_RELEASE do not conflict with each other.

Modules/FortranCInterface/CMakeLists.txt

@@ -93,11 +93,12 @@ add_library(myfort STATIC mysub.f my_sub.f ${myfort_modules})
 
 # Provide symbols through C but fall back to Fortran.
 add_library(symbols STATIC ${symbol_sources})
-target_link_libraries(symbols myfort)
+target_link_libraries(symbols PUBLIC myfort)
+
 # In case the Fortran compiler produces PIC by default make sure
 # the C compiler produces PIC even if it is not its default.
 set_property(TARGET symbols PROPERTY POSITION_INDEPENDENT_CODE 1)
 
 # Require symbols through Fortran.
 add_executable(FortranCInterface main.F call_sub.f ${call_mod})
-target_link_libraries(FortranCInterface symbols)
+target_link_libraries(FortranCInterface PUBLIC symbols)

Modules/FortranCInterface/Detect.cmake

@@ -27,6 +27,7 @@ unset(FortranCInterface_VERIFIED_CXX CACHE)
 set(_result)
 
 # Build a sample project which reports symbols.
+set(CMAKE_TRY_COMPILE_CONFIGURATION Release)
 try_compile(FortranCInterface_COMPILED
   ${FortranCInterface_BINARY_DIR}
   ${FortranCInterface_SOURCE_DIR}
@@ -35,6 +36,8 @@ try_compile(FortranCInterface_COMPILED
   CMAKE_FLAGS
     "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_FLAGS}"
     "-DCMAKE_Fortran_FLAGS:STRING=${CMAKE_Fortran_FLAGS}"
+    "-DCMAKE_C_FLAGS_RELEASE:STRING=${CMAKE_C_FLAGS_RELEASE}"
+    "-DCMAKE_Fortran_FLAGS_RELEASE:STRING=${CMAKE_Fortran_FLAGS_RELEASE}"
   OUTPUT_VARIABLE FortranCInterface_OUTPUT)
 set(FortranCInterface_COMPILED ${FortranCInterface_COMPILED})
 unset(FortranCInterface_COMPILED CACHE)
@@ -43,7 +46,7 @@ unset(FortranCInterface_COMPILED CACHE)
 if(FortranCInterface_COMPILED)
   find_program(FortranCInterface_EXE
     NAMES FortranCInterface${CMAKE_EXECUTABLE_SUFFIX}
-    PATHS ${FortranCInterface_BINARY_DIR} ${FortranCInterface_BINARY_DIR}/Debug
+    PATHS ${FortranCInterface_BINARY_DIR} ${FortranCInterface_BINARY_DIR}/Release
     NO_DEFAULT_PATH
     )
   set(FortranCInterface_EXE ${FortranCInterface_EXE})