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older compiler than gcc 5 does not have __has_attribute

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fix for older compiler than gcc 5

Reference: kernel's include/linux/compiler_attributes.h
This commit is contained in:
Hin-Tak Leung 2020-12-04 22:05:28 +00:00
parent 5c9e04cd57
commit b380ebfb26
1 changed files with 4 additions and 0 deletions
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4
sound-compatible-4.18.h
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@ -16,6 +16,10 @@
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,4,0)
#ifndef __has_attribute
# define __has_attribute(x) __GCC4_has_attribute_##x
# define __GCC4_has_attribute___fallthrough__ 0
#endif
#if __has_attribute(__fallthrough__)
# define fallthrough __attribute__((__fallthrough__))
#else