diff options
| author | Arthur de Jong <arthur@arthurdejong.org> | 2008-01-31 23:11:46 +0100 |
|---|---|---|
| committer | Arthur de Jong <arthur@arthurdejong.org> | 2008-01-31 23:11:46 +0100 |
| commit | 5d5935c3c9fdd609540cf58bee7d4f2655f70139 (patch) | |
| tree | bb9c419dcd178225f44186ad5bb5eecab39ee1fd /compat | |
| parent | 61be00f5ac69cd7be94b10af7b92b8fd9b0f4df8 (diff) | |
only define MUST_USE attribute if gcc version is more recent than 3.4
git-svn-id: http://arthurdejong.org/svn/nss-pam-ldapd/nss-ldapd@594 ef36b2f9-881f-0410-afb5-c4e39611909c
Diffstat (limited to 'compat')
| -rw-r--r-- | compat/attrs.h | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/compat/attrs.h b/compat/attrs.h index eb2e5c2..b91cc11 100644 --- a/compat/attrs.h +++ b/compat/attrs.h @@ -1,7 +1,7 @@ /* attrs.h - wrapper macros for the gcc __attribute__(()) directive - Copyright (C) 2007 Arthur de Jong + Copyright (C) 2007, 2008 Arthur de Jong This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public @@ -22,11 +22,15 @@ #ifndef _COMPAT_ATTRS_H #define _COMPAT_ATTRS_H 1 +/* macro for testing the version of GCC */ +#define GCC_VERSION(major,minor) \ + ((__GNUC__ > (major)) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) + /* These are macros to use some gcc-specific flags in case the're available and otherwise define them to empty strings. This allows us to give the compiler some extra information. */ -#if __GNUC__ >= 3 +#if GCC_VERSION(3,0) /* gcc >= 3.0 */ /* this is used to flag function parameters that are not used in the function body. */ @@ -41,22 +45,29 @@ the parameters and has no side effects or used static data */ #define PURE __attribute__((__pure__)) -/* the function's return value should be used by the caller */ -#define MUST_USE __attribute__((__warn_unused_result__)) - /* the function returns a new data structure that has been freshly allocated */ #define LIKE_MALLOC __attribute__((__malloc__)) -#else /* not __GNUC__ */ +#else /* not gcc >= 3.0 */ #define UNUSED(x) x #define LIKE_PRINTF(format_idx,arg_idx) /* no attribute */ #define PURE /* no attribute */ -#define MUST_USE /* no attribute */ #define LIKE_MALLOC /* no attribute */ -#endif /* not __GNUC__ */ +#endif /* not gcc >= 3.0 */ + +#if GCC_VERSION(3,4) /* gcc >= 3.4 */ + +/* the function's return value should be used by the caller */ +#define MUST_USE __attribute__((__warn_unused_result__)) + +#else /* not gcc >= 3.4 */ + +#define MUST_USE /* no attribute */ + +#endif /* not gcc >= 3.4 */ /* define __STRING if it's not yet defined */ #ifndef __STRING |