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Merge pull request #1073 from facebook/hasAttribute

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make `DYNAMIC_BMI2` support of `clang` conditional to `__has_attribute()`
This commit is contained in:
Yann Collet
2018-03-24 09:52:26 -07:00
committed by GitHub
parent 1a83bcbd93 ad15c1b724
commit a2d571de78
1 changed files with 4 additions and 1 deletions
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lib/common/compiler.h
+4 -1
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@@ -64,6 +64,9 @@
#endif #endif
/* target attribute */ /* target attribute */
#ifndef __has_attribute
#define __has_attribute(x) 0 /* Compatibility with non-clang compilers. */
#endif
#if defined(__GNUC__) #if defined(__GNUC__)
# define TARGET_ATTRIBUTE(target) __attribute__((__target__(target))) # define TARGET_ATTRIBUTE(target) __attribute__((__target__(target)))
#else #else
@@ -74,7 +77,7 @@
* Enabled for clang & gcc >=4.8 on x86 when BMI2 isn't enabled by default. * Enabled for clang & gcc >=4.8 on x86 when BMI2 isn't enabled by default.
*/ */
#ifndef DYNAMIC_BMI2 #ifndef DYNAMIC_BMI2
#if defined(__clang__) \ #if (defined(__clang__) && __has_attribute(__target__)) \
|| (defined(__GNUC__) \ || (defined(__GNUC__) \
&& (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) \ && (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) \
&& (defined(__x86_64__) || defined(_M_X86)) \ && (defined(__x86_64__) || defined(_M_X86)) \