Leah Neukirchen 23b0bb480b gcc: override glibcxx_cv_c99_math_cxx98=yes and glibcxx_cv_c99_math_cxx11=yes. ... A glibc 2.26 regression (https://sourceware.org/bugzilla/show_bug.cgi?id=21930) broke the test detecting whether libstdc++ can make use of C99 <math.h> functions, which resulted in <cmath> loading <math.h> the wrong way, breaking all C++ code using <cmath>. We override the test to provide the correct result, and <math.h> is now imported again in a C++ friendly way via <cmath>. Closes #7324. See also #7307.		2017-08-10 18:12:05 +02:00
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