CODEWITHSUNDEEP
cygwinldlinker-flags
user69453
user69453

Reputation: 1405

What is the difference betwen --export-dynamic and --export-all-symbols?

After compiling on Cygwin with gcc or clang, ld complains about

/usr/bin/ld: warning: --export-dynamic is not supported for PE+ targets, did you mean --export-all-symbols?

Changing the linkerflag as suggested fixes this behavior, but I am not sure if this is correct. Therefore the question is simple:

What is the difference betwen --export-dynamic and --export-all-symbols?

Upvotes: 3

Views: 6598

Answers (1)

Florian Weimer
Florian Weimer

Reputation: 33694

--export-dynamic is for ELF targets:

Note that this option is specific to ELF targeted ports. PE targets support a similar function to export all symbols from a DLL or EXE; see the description of ‘--export-all-symbols’ below.

--export-all-symbols is for PE targets:

This option is specific to the i386 PE targeted port of the linker

It would probably have been possible to subsume both under --export-dynamic (because that was there first), but the implementation is completely different, and this leaked out to the ld command line interface.

Upvotes: 2

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