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curl.h: use __has_declspec_attribute for shared builds 

Closes #3616
This commit is contained in:
Don J Olmstead 2019-02-25 14:17:51 -08:00 committed by Daniel Stenberg
parent 6cc6a447e6
commit 50482b8c0a
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1 changed files with 8 additions and 1 deletions
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9
include/curl/curl.h
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@ -91,6 +91,11 @@
#include <support/SupportDefs.h>
#endif
/* Compatibility for non-Clang compilers */
#ifndef __has_declspec_attribute
# define __has_declspec_attribute(x) 0
#endif
#ifdef __cplusplus
extern "C" {
#endif
@ -109,7 +114,9 @@ typedef void CURLSH;
#ifdef CURL_STATICLIB
# define CURL_EXTERN
#elif defined(WIN32) || defined(_WIN32) || defined(__SYMBIAN32__)
#elif defined(WIN32) || defined(_WIN32) || defined(__SYMBIAN32__) || \
(__has_declspec_attribute(dllexport) && \
__has_declspec_attribute(dllimport))
# if defined(BUILDING_LIBCURL)
# define CURL_EXTERN __declspec(dllexport)
# else