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26 lines
865 B
26 lines
865 B
diff --git a/src/webp/types.h b/src/webp/types.h |
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index 0ce2622..69f7e89 100644 |
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--- a/src/webp/types.h |
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+++ b/src/webp/types.h |
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@@ -39,7 +39,9 @@ typedef long long int int64_t; |
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#ifndef WEBP_EXTERN |
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// This explicitly marks library functions and allows for changing the |
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// signature for e.g., Windows DLL builds. |
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-# if defined(__GNUC__) && __GNUC__ >= 4 |
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+# if defined(_MSC_VER) && defined(WEBP_DLL) |
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+# define WEBP_EXTERN __declspec(dllexport) |
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+# elif defined(__GNUC__) && __GNUC__ >= 4 |
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# define WEBP_EXTERN extern __attribute__ ((visibility ("default"))) |
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# else |
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# define WEBP_EXTERN extern |
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diff --git a/CMakeLists.txt b/CMakeLists.txt |
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index 2501012..2e090e6 100644 |
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--- a/CMakeLists.txt |
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+++ b/CMakeLists.txt |
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@@ -16,2 +16,6 @@ project(WebP C) |
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+if(MSVC AND BUILD_SHARED_LIBS) |
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+ add_definitions(-DWEBP_DLL) |
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+endif() |
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+ |
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# Options for coder / decoder executables.
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