cce01d0d8e
GCC <cstdlib> needs ::strtold declared. Qt's include chain pulls in <cstdlib> before stdlib.h. Adding #include <stdlib.h> at the top of common_helpers_p.h fixes the 'strtold has not been declared in ::' error. Reverted -U_GLIBCXX_USE_C99_STDLIB toolchain breakage.