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Merge branch 'bug22915_029_2' into maint-0.2.9

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This commit is contained in:
Nick Mathewson 2017-07-26 12:53:13 -04:00
commit 6d3c5b8fb5
2 changed files with 19 additions and 0 deletions
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3
changes/bug22915 Normal file
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@ -0,0 +1,3 @@
o Minor bugfixes (compilation warnings):
- Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
bugfix on 0.2.8.1-alpha.

16
src/common/util.c
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@ -5705,6 +5705,18 @@ clamp_double_to_int64(double number)
#define PROBLEMATIC_FLOAT_CONVERSION_WARNING
DISABLE_GCC_WARNING(float-conversion)
#endif
/*
With clang 4.0 we apparently run into "double promotion" warnings here,
since clang thinks we're promoting a double to a long double.
*/
#if defined(__clang__)
#if __has_warning("-Wdouble-promotion")
#define PROBLEMATIC_DOUBLE_PROMOTION_WARNING
DISABLE_GCC_WARNING(double-promotion)
#endif
#endif
/* NaN is a special case that can't be used with the logic below. */
if (isnan(number)) {
return 0;
@ -5730,6 +5742,10 @@ DISABLE_GCC_WARNING(float-conversion)
/* Handle infinities and finite numbers with magnitude >= 2^63. */
return signbit(number) ? INT64_MIN : INT64_MAX;
#ifdef PROBLEMATIC_DOUBLE_PROMOTION_WARNING
ENABLE_GCC_WARNING(double-promotion)
#endif
#ifdef PROBLEMATIC_FLOAT_CONVERSION_WARNING
ENABLE_GCC_WARNING(float-conversion)
#endif