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New macros for controlling use of weak linkage

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- `UNITY_WEAK_ATTRIBUTE`, if defined, is placed before declarations of weakly
   linked symbols. If not manually defined, it will be automatically set to
   `__attribute__((weak))` on GCC and Clang, except for Clang for Win32.
 - `UNITY_WEAK_PRAGMA`, if defined, will cause preprocessor to emit
   `#pragma weak setUp`, etc. Ignored if `UNITY_WEAK_ATTRIBUTE` is defined.
 - `UNITY_NO_WEAK` undefines both of the above resulting in no weakly
   linked symbols.

Work around for ThrowTheSwitch/Unity#93
This commit is contained in:
Zane D. Purvis
2014-12-15 16:02:59 -05:00
parent 6792a5f4ed
commit cadee02e79
2 changed files with 19 additions and 17 deletions
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21
src/unity_internals.h
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@ -292,22 +292,19 @@ extern int UNITY_OUTPUT_CHAR(int);
//-------------------------------------------------------
// Language Features Available
//-------------------------------------------------------
#ifdef __GNUC__
#define UNITY_SUPPORT_WEAK __attribute__((weak))
#if !defined(UNITY_WEAK_ATTRIBUTE) && !defined(UNITY_WEAK_PRAGMA)
# ifdef __GNUC__ // includes clang
# if !(defined(__WIN32__) && defined(__clang__))
# define UNITY_WEAK_ATTRIBUTE __attribute__((weak))
# endif
# endif
#endif
#ifdef __clang__
#define UNITY_SUPPORT_WEAK __attribute__((weak))
#ifdef UNITY_NO_WEAK
# undef UNITY_WEAK_ATTRIBUTE
# undef UNITY_WEAK_PRAGMA
#endif
#ifndef UNITY_WEAK
#ifdef UNITY_SUPPORT_WEAK
#define UNITY_WEAK UNITY_SUPPORT_WEAK
#else
#define UNITY_WEAK
#endif
#endif
//-------------------------------------------------------
// Internal Structs Needed