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On Mon, 22 Feb 1999, Paul Derbyshire wrote: > C:\PGD\C++\omega\ofc>gcc ntst.cc -o ntst.exe -Wall -lm -lstdcxx > c:/djgpp/tmp/cc5PNfut.o(.text+0x51):ntst.cc: undefined reference to > `atan(long double)' [ snip ] > What the hell? Is that -really- necessary? Pipe down, already. > Stroustrup 3rd Ed definitely informs me that long double overloads for > these and other functions are supposed to be in either libm or libstdc++. Uhhh... if you're referring to page 660 (section 22.3) it most certainly does not make any such guarantee with regards to -long double- datatypes. > Using egcs 1.1.1 and the libm and libstdc++ that came with it. at least on my box (sparc solaris), libm is vendor provided. gnu/include/g++/cmath -does- make reference to the math functions that use long doubles for arguments, but I don't think any library on my box actually supports them. Possibly there for platforms that do? There for platforms that typedef a long double to be the same as a double? (nm'ing vendor's libm and stdc++ does not reveal math functions taking long doubles, but possibly some other lib I'm ignoring? I did find math functions take complex objects as arguments though.) -Bob