diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/ruby/missing.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/ruby/missing.h b/include/ruby/missing.h index 2d3852c131..03657042ce 100644 --- a/include/ruby/missing.h +++ b/include/ruby/missing.h @@ -168,7 +168,7 @@ RUBY_EXTERN const union bytesequence4_or_float rb_nan; # include <ieeefp.h> # endif # define isinf(x) (!finite(x) && !isnan(x)) -# elif __cplusplus >= 201103L +# elif defined(__cplusplus) && __cplusplus >= 201103L # include <cmath> // it must include constexpr bool isinf(double); # else RUBY_EXTERN int isinf(double); @@ -178,7 +178,7 @@ RUBY_EXTERN int isinf(double); #ifndef isnan # ifndef HAVE_ISNAN -# if __cplusplus >= 201103L +# if defined(__cplusplus) && __cplusplus >= 201103L # include <cmath> // it must include constexpr bool isnan(double); # else RUBY_EXTERN int isnan(double); |