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doc: include arg -DSECP256K1_USE_EXTERNAL_DEFAULT_CALLBACKS=ON for cmake #1790

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Merged
real-or-random merged 1 commit into from
Dec 19, 2025
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doc: include arg -DSECP256K1_USE_EXTERNAL_DEFAULT_CALLBACKS=ON for cmake #1790

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3 changes: 2 additions & 1 deletion include/secp256k1.h
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Original file line number Diff line number Diff line change
Expand Up @@ -349,7 +349,8 @@ SECP256K1_API void secp256k1_context_destroy(
* writes the message to stderr and calls abort. This default callback can be
* replaced at link time if the preprocessor macro
* USE_EXTERNAL_DEFAULT_CALLBACKS is defined, which is the case if the build
* has been configured with --enable-external-default-callbacks. Then the
* has been configured with --enable-external-default-callbacks (GNU Autotools) or
* -DSECP256K1_USE_EXTERNAL_DEFAULT_CALLBACKS=ON (CMake). Then the
* following two symbols must be provided to link against:
* - void secp256k1_default_illegal_callback_fn(const char *message, void *data);
* - void secp256k1_default_error_callback_fn(const char *message, void *data);
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