updated FSFWConfig.h.in and submodules

bsp_stm32h7_freertos/fsfwconfig/FSFWConfig.h.in

@@ -1,8 +1,13 @@
 #ifndef CONFIG_FSFWCONFIG_H_
 #define CONFIG_FSFWCONFIG_H_
 
+#ifdef __cplusplus
 #include <cstddef>
 #include <cstdint>
+#else
+#include <stddef.h>
+#include <stdint.h>
+#endif
 
 //! Used to determine whether C++ ostreams are used which can increase
 //! the binary size significantly. If this is disabled,
@@ -50,6 +55,8 @@
 //! If set to 1 the binary needs "cap_sys_nice=eip" privileges to run
 #define FSFW_USE_REALTIME_FOR_LINUX     1
 
+#ifdef __cplusplus
+
 namespace fsfwconfig {
 
 //! Default timestamp size. The default timestamp will be an seven byte CDC short timestamp.
@@ -72,4 +79,6 @@ static constexpr size_t FSFW_MAX_TM_PACKET_SIZE = 2048;
 
 }
 
+#endif
+
 #endif /* CONFIG_FSFWCONFIG_H_ */