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abi: Use dllexport for mingw builds

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This should fix mingw exports, specifically hiding the following:
secp256k1_pre_g_128
secp256k1_pre_g
secp256k1_ecmult_gen_prec_table

This changes our visibility macros to look more like gcc's recommendation:
https://gcc.gnu.org/wiki/Visibility#How_to_use_the_new_C.2B-.2B-_visibility_support
This commit is contained in:
Cory Fields 2023-05-04 15:56:39 +00:00
parent f30c74866b
commit bc7c8db179
1 changed files with 3 additions and 2 deletions
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include/secp256k1.h
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@ -133,8 +133,9 @@ typedef int (*secp256k1_nonce_function)(
# define SECP256K1_NO_BUILD
#endif
/* Symbol visibility. See libtool manual, section "Windows DLLs". */
#if defined(_WIN32) && !defined(__GNUC__)
/* Symbol visibility. See https://gcc.gnu.org/wiki/Visibility */
/* DLL_EXPORT is defined internally for shared builds */
#if defined(_WIN32)
# ifdef SECP256K1_BUILD
# ifdef DLL_EXPORT
# define SECP256K1_API __declspec (dllexport)