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Use __has_declspec_attribute for shared builds 

Clang compilation targets may support `__declspec` attributes. Because of that it has a `__has_declspec_attribute` [check](https://clang.llvm.org/docs/LanguageExtensions.html#has-declspec-attribute).

Currently libpsl just assumes that `__declspec` is Windows only. This adds a compatibility macro and checks whether `dllimport` and `dllexport` are available.
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Don 2018-09-24 17:17:48 -07:00 committed by GitHub
parent 523397fb83
commit d5e230b005
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1 changed files with 6 additions and 2 deletions
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8
include/libpsl.h.in
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@ -40,12 +40,16 @@
#define PSL_VERSION_PATCH @LIBPSL_VERSION_PATCH@ #define PSL_VERSION_PATCH @LIBPSL_VERSION_PATCH@
#define PSL_VERSION_NUMBER @LIBPSL_VERSION_NUMBER@ #define PSL_VERSION_NUMBER @LIBPSL_VERSION_NUMBER@
#ifndef __has_declspec_attribute
# define __has_declspec_attribute(x) 0
#endif
#ifndef PSL_API #ifndef PSL_API
#if defined BUILDING_PSL && HAVE_VISIBILITY #if defined BUILDING_PSL && HAVE_VISIBILITY
# define PSL_API __attribute__ ((__visibility__("default"))) # define PSL_API __attribute__ ((__visibility__("default")))
#elif defined BUILDING_PSL && defined _MSC_VER && !defined PSL_STATIC #elif defined BUILDING_PSL && (defined _MSC_VER || (__has_declspec_attribute(dllexport) && __has_declspec_attribute(dllimport))) && !defined PSL_STATIC
# define PSL_API __declspec(dllexport) # define PSL_API __declspec(dllexport)
#elif defined _MSC_VER && !defined PSL_STATIC #elif (defined _MSC_VER || (__has_declspec_attribute(dllexport) && __has_declspec_attribute(dllimport))) && !defined PSL_STATIC
# define PSL_API __declspec(dllimport) # define PSL_API __declspec(dllimport)
#else #else
# define PSL_API # define PSL_API