Singular fails to build with GCC 4.7.x on Solaris

[not.really@…]

This is because on Solaris, a couple of C math (and stdlib) functions get overloaded if __cplusplus >= 199711L (which is the case with GCC 4.7.x), and pulled into the global namespace, such that calling e.g. floor() or log10() with an int, which is done in kernel/bigintmat.cc, gets ambiguous.

Cf. Sage trac ticket #14295 (where one can find a patch against Singular 3-1-5 as well).

This applies to Singular 3-1-5 as well as 3-1-6, where the latter adds another ambiguous call to floor().

The fix is obvious; just use floor((double)(...) and log10((double)(...)) where appropriate.

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P.S.: Using floor() in int ci = floor(i/col); is superfluous anyway (since both i and col are ints).

[hannes]

Thanks - fixed as proposed.