Fixes #14: We now have a CMake build option, translated into a defined value, controlling whether or not to alias printf(), sprintf() etc.

Author: Eyal Rozenberg

CMakeLists.txt

@@ -29,6 +29,16 @@ if (NOT SUPPORT_PTRDIFF_ARGUMENTS)
 	add_definitions(-DPRINTF_DISABLE_SUPPORT_PTRDIFF_T)
 endif()
 
+option(ALIAS_STANDARD_FUNCTION_NAMES "Alias the relevant standard library function (printf, sprintf etc.) to the library's implementations" ON)
+if (NOT ALIAS_STANDARD_FUNCTION_NAMES)
+	add_definitions(-DALIAS_STANDARD_FUNCTION_NAMES)
+endif()
+
+option(ALIAS_STANDARD_FUNCTION_NAMES "Alias the relevant standard library function (printf, sprintf etc.) to the library's implementations" ON)
+if (NOT ALIAS_STANDARD_FUNCTION_NAMES)
+	add_definitions(-DALIAS_STANDARD_FUNCTION_NAMES)
+endif()
+
 # numeric defines
 
 set(INTEGER_TO_STRING_BUFFER_SIZE "32" CACHE STRING "Integer to string (ntoa) conversion buffer size")

printf.h

@@ -49,6 +49,15 @@ __attribute__((format(__printf__, (one_based_format_index), (first_arg))))
 # define ATTR_VPRINTF(one_based_format_index)
 #endif
 
+#ifdef ALIAS_STANDARD_FUNCTION_NAMES
+# define printf    printf_
+# define sprintf   sprintf_
+# define vsprintf  vsprintf_
+# define snprintf  snprintf_
+# define vsnprintf vsnprintf_
+# define vprintf   vprintf_
+#endif
+
 
 /**
  * Output a character to a custom device like UART, used by the printf() function