On 10/03/17 12:12 +0000, Richard Sandiford wrote:
libstdc++-v3 configure checks whether old glibc inline definitions
of isnan would conflict with the libstdc++-v3 definitions and
works around them if so. But if g++ 6.x build A is used to build
another g++ 6.x B, the configure step for B will pick up the math.h
installed alongside A instead of the glibc version. configure will
then assume that the workaround isn't necessary, leaving B with a
broken cmath.
isinf already worked around this. This patch extends the same fix
to isnan. (Thanks to George for the fix.)
Huh, I wonder why I only did it for one of them.
Tested on arch64-linux-gnu. OK for trunk and 6.x?
OK, thanks.
