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Commit 4d1c4da0 authored by Dominik Loidolt's avatar Dominik Loidolt
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Fix UNUSED macro for older compiler (gcc 4.4 and older)

parent 98ec18e6
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1 merge request!26Adapt cmp_tool to the chunk decompression
......@@ -21,6 +21,22 @@
#define COMPILER_H
/* Derived from Linux "Features Test Macro" header Convenience macros to test
* the versions of gcc (or a compatible compiler).
* Use them like this:
* #if GNUC_PREREQ (2,8)
* ... code requiring gcc 2.8 or later ...
* #endif
*/
#if defined(__GNUC__) && defined(__GNUC_MINOR__)
# define GNUC_PREREQ(maj, min) \
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
#define GNUC_PREREQ(maj, min) 0
#endif
/**
* Compile time check usable outside of function scope.
* Stolen from Linux (hpi_internal.h)
......@@ -108,12 +124,19 @@
*
* This macro is used to indicate that a variable is intentionally left unused
* in the code. It helps suppress compiler warnings about unused variables.
* It also protecting against actual use of the "unused" variable.
*
* It also tries to prevent the actual use of the "unused" variables.
*/
#if GNUC_PREREQ(4, 5)
#define UNUSED __attribute__((unused)) \
__attribute__((deprecated ("parameter declared as UNUSED")))
#elif defined(__GNUC__)
#define UNUSED __attribute__((unused)) \
__attribute__((deprecated))
#else
#define UNUSED
#endif
/**
......
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