On 6/19/17 4:31 AM, Steve Kargl wrote:
> On Sun, Jun 18, 2017 at 11:29:05AM -0700, Steve Kargl wrote:
>> Both IEEE-754 2008 and ISO/IEC TS 18661-4 define the half-cycle
>> trignometric functions cospi, sinpi, and tanpi. When libm (aka
>> math.h) grows support for sinpi(x), lang/python27 has a namespace
>> collision. The attached patch fixes the problem.
>>
Hi Steve,
Is this issue relevant only for particular (and/or future) FreeBSD
versions ('where libm grows supports for x, y') or independent of base
entirely?
Also, could you open an upstream issue regarding this please, as a
long-term target for all local (Python port) patches is that they are
included upstream.
This also ensures we can document all patches with their relevant
upstream issue/commit references for our future selves and others.
./koobs
> Well, that's inconvenient. Seems attachments are stripped.
>
> --- Modules/mathmodule.c.orig 2017-06-18 11:09:05.938222000 -0700
> +++ Modules/mathmodule.c 2017-06-18 11:09:56.248307000 -0700
> @@ -71,7 +71,7 @@
> static const double sqrtpi = 1.772453850905516027298167483341145182798;
>
> static double
> -sinpi(double x)
> +my_sinpi(double x)
> {
> double y, r;
> int n;
> @@ -270,7 +270,7 @@
> integer. */
> if (absx > 200.0) {
> if (x < 0.0) {
> - return 0.0/sinpi(x);
> + return 0.0/my_sinpi(x);
> }
> else {
> errno = ERANGE;
> @@ -294,7 +294,7 @@
> }
> z = z * lanczos_g / y;
> if (x < 0.0) {
> - r = -pi / sinpi(absx) / absx * exp(y) / lanczos_sum(absx);
> + r = -pi / my_sinpi(absx) / absx * exp(y) / lanczos_sum(absx);
> r -= z * r;
> if (absx < 140.0) {
> r /= pow(y, absx - 0.5);
> @@ -366,7 +366,7 @@
> (x-0.5)*(log(x+lanczos_g-0.5)-1);
> }
> else {
> - r = log(pi) - log(fabs(sinpi(absx))) - log(absx) -
> + r = log(pi) - log(fabs(my_sinpi(absx))) - log(absx) -
> (log(lanczos_sum(absx)) - lanczos_g +
> (absx-0.5)*(log(absx+lanczos_g-0.5)-1));
> }
>
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