Partial revert of 4427. To keep the source compatibile with the old build...

Partial revert of 4427.  To keep the source compatibile with the old build system, rename mx_stream.cc to mx_stream.c and do some cmake tricks to build it as C++.

git-svn-id: https://redoubt.ligo-wa.caltech.edu/svn/advLigoRTS/trunk@4430 6dcd42c9-f523-4c6d-aada-af552506706e

src/mx_stream/CMakeLists.txt

@@ -3,11 +3,15 @@ include(FindThreads)
 
 if (OPENMX_FOUND)
 
-    add_executable(mx_stream mx_stream.cc ${CMAKE_CURRENT_SOURCE_DIR}}/../drv/rfm.c)
+    # this is a weird area, these are .c files but need to be built as C++
+    # this should be fixed after we stop the manual makefile build
+    set (CMAKE_C_COMPILER ${CMAKE_CXX_COMPILER})
+    add_executable(mx_stream mx_stream.c ${CMAKE_CURRENT_SOURCE_DIR}}/../drv/rfm.c)
     target_compile_definitions(mx_stream PUBLIC -DNO_RTL -D_XOPEN_SOURCE -D_BSD_SOURCE)
     target_include_directories(mx_stream PUBLIC
             ${CMAKE_CURRENT_SOURCE_DIR}
             ${CMAKE_CURRENT_SOURCE_DIR}/../common
             ${CMAKE_CURRENT_SOURCE_DIR}/../common/bsd)
     target_link_libraries(mx_stream PUBLIC openmx::openmx ${MAKE_THREAD_LIBS_INIT})
+    set_target_properties(mx_stream PROPERTIES LINKER_LANGUAGE CXX)
 endif (OPENMX_FOUND)

src/mx_stream/mx_stream.cc → src/mx_stream/mx_stream.c

@@ -56,9 +56,7 @@ volatile int threads_running;
 unsigned int do_wait = 0; // Wait for this number of milliseconds before starting a cycle
 unsigned int wait_delay = 4; // Wait before acknowledging sends with mx_wait() for this number of cycles times nsys
 
-extern "C" {
 extern void *findSharedMemory(char *);
-}
 
 void
 usage()