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wasm_export.h: Use "default" visibility for gcc and clang (#3957)

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Since the top-level CMakelists.txt is appending `-fvisibility=hidden` to
the compile options, no public symbols are exported by default. This
forbids users from linking against the shared library.

Using `gcc/clang` attributes [1], it is possible to override the definition
for `WASM_RUNTIME_API_EXTERN` so that only required symbols are
correctly exported.

[1]: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#Common-Function-Attributes
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Xavier Del Campo 2024-12-19 01:49:13 +01:00 committed by GitHub
parent 9563909d6c
commit 296c3cc69d
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core/iwasm/include/wasm_export.h
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@ -23,6 +23,8 @@
#else #else
#define WASM_RUNTIME_API_EXTERN __declspec(dllimport) #define WASM_RUNTIME_API_EXTERN __declspec(dllimport)
#endif #endif
#elif defined(__GNUC__) || defined(__clang__)
#define WASM_RUNTIME_API_EXTERN __attribute__((visibility("default")))
#else #else
#define WASM_RUNTIME_API_EXTERN #define WASM_RUNTIME_API_EXTERN
#endif #endif