Find all needed information about Weak Symbol Support. Below you can see links where you can find everything you want to know about Weak Symbol Support.
https://stackoverflow.com/questions/27935228/does-android-support-weak-symbols
That is, a native component could provide symbols like rand but adorn them with __attribute__ ( (weak)). If the symbol is found in another library, like the standard runtime, then the weakly linked symbol would not be used. On the other hand, if the symbol was missing, then the native component's version would be used.
https://docs.oracle.com/cd/E19683-01/816-1386/chapter2-11/index.html
If a static executable is being generated, the symbol is converted to an absolute symbol and assigned a value of zero. If a dynamic executable or shared object is being produced, the symbol will be left as an undefined weak reference and assigned the value zero. During process execution, the runtime linker searches for this symbol.
https://github.com/ziglang/zig/issues/1917
When an external weak symbol is not linked, there actually is no address for it. So representing it as an optional type is incorrect. What we need is an optional pointer to the symbol. For that I propose a builtin function: @externWeak(comptime name: []const u8, comptime PointerType: type) ?PointerType. PointerType could be any pointer type. The reason we supply the pointer type and not the element …
http://infocenter.arm.com/help/topic/com.arm.doc.faqs/ka14171.html
Weak Definitions. A function definition (or EXPORTed label in assembler) can also be marked as weak, as can a variable definition. In this case, a weak symbol definition is created in the object file. A weak definition can be used to resolve any reference to that symbol in the same way as a normal definition.
https://teamrock.wordpress.com/2008/10/18/gcc-weak-symbols/
Oct 18, 2008 · The function hasn’t been defined as a weak symbol and so will override the weak symbol. In this case the function will provide the caller with the clock operations specific to the SH7712. In this manner the existing generic clock support code has been designed such that it can be easily extended to support future SH subtypes.
http://www.keil.com/support/man/docs/armcc/armcc_chr1359124970859.htm
Functions defined with __weak export their symbols weakly. A weakly defined function behaves like a normally defined function unless a nonweakly defined function of the same name is linked into the same image. If both a nonweakly defined function and a weakly defined function exist in...
http://cmake.3232098.n2.nabble.com/detecting-attribute-weak-support-td7589507.html
detecting __attribute__((weak)) support. I searched and didn't find yet would it be reasonable to have built in support in cmake for knowing if the platform/compiler supports weak symbols ? I'm...
https://software.intel.com/en-us/forums/intel-c-compiler/topic/386159
In fact, it depends on the library order. The meaning of "weak" symbol is, when no other symbol is defined, its value will be zero, but does not mean a weak symbol will always be override by strong symbol. If weak symbol comes first, strong symbol will not be used still. So, the rule #1 works here too.
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