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Paul Eggert authored
Without this fix, the command to link temacs failed due to an undefined symbol __builtin_isnan. This is because /usr/include/iso/math_c99.h #defines isnan(x) to __builtin_isnan(x), but the bundled gcc, which identifies itself as gcc 3.4.3 (csl-sol210-3_4-branch+sol_rpath), does not have a __builtin_isnan. * configure.in (isnan): Remove now-unnecessary check. * src/floatfns.c (isnan): #undef, and then #define to a clone of what's in data.c. (Fisnan): Always define, since it's always available now. (syms_of_floatfns): Always define isnan at the Lisp level.
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