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Guard __has_attribute for compilers that don't support it #1129

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Aug 18, 2021
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Guard __has_attribute for compilers that don't support it #1129

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Guard `__has_attribute` for compilers that don't support it
lgritz Aug 14, 2021
e4fa4b4
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lgritz Aug 16, 2021
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8 changes: 8 additions & 0 deletions cmake/OpenEXRConfig.h.in
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,14 @@
(uint32_t(OPENEXR_VERSION_MINOR) << 16) | \
(uint32_t(OPENEXR_VERSION_PATCH) << 8))


// On modern versions of gcc & clang, __has_attribute can test support for
// __attribute__((attr)). Make sure it's safe for other compilers.
#ifndef __has_attribute
# define __has_attribute(x) 0
#endif


// Whether the user configured the library to have symbol visibility
// tagged
#cmakedefine OPENEXR_ENABLE_API_VISIBILITY
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