[DRE-maint] Bug#996219: ruby-enumerable-statistics: FTBFS with ruby3.0: statistics.c:67:32: error: ‘RComplex’ undeclared (first use in this function)

[Antonio Terceiro]

Source: ruby-enumerable-statistics
Version: 2.0.1+dfsg-3
Severity: serious
Justification: FTBFS
Tags: bookworm sid ftbfs
User: debian-ruby at lists.debian.org
Usertags: ruby3.0

Hi,

We are about to enable building against ruby3.0 on unstable. During a test
rebuild, ruby-enumerable-statistics was found to fail to build in that situation.

To reproduce this locally, you need to install ruby-all-dev from experimental
on an unstable system or build chroot.

Relevant part (hopefully):
> gcc -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -I. -I/usr/include/x86_64-linux-gnu/ruby-3.0.0 -I/usr/include/ruby-3.0.0/ruby/backward -I/usr/include/ruby-3.0.0 -I. -DHAVE_RB_RATIONAL_NEW -DHAVE_RB_RATIONAL_NUM -DHAVE_RB_RATIONAL_DEN -DHAVE_RB_COMPLEX_RAW -DHAVE_RB_COMPLEX_REAL -DHAVE_RB_COMPLEX_IMAG -DHAVE_RB_COMPLEX_PLUS -DHAVE_RB_COMPLEX_DIV -DHAVE_RB_DBL_COMPLEX_NEW -Wdate-time -D_FORTIFY_SOURCE=2   -fPIC -g -O2 -ffile-prefix-map=/build/ruby3.0-2KsnwC/ruby3.0-3.0.2=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC  -o statistics.o -c statistics.c
> statistics.c: In function ‘complex_add’:
> statistics.c:67:25: warning: implicit declaration of function ‘R_CAST’ [-Wimplicit-function-declaration]
>    67 | # define RCOMPLEX(obj) (R_CAST(RComplex)(obj))
>       |                         ^~~~~~
> statistics.c:152:18: note: in expansion of macro ‘RCOMPLEX’
>   152 |     real = f_add(RCOMPLEX(self)->real, RCOMPLEX(other)->real);
>       |                  ^~~~~~~~
> statistics.c:67:32: error: ‘RComplex’ undeclared (first use in this function)
>    67 | # define RCOMPLEX(obj) (R_CAST(RComplex)(obj))
>       |                                ^~~~~~~~
> statistics.c:152:18: note: in expansion of macro ‘RCOMPLEX’
>   152 |     real = f_add(RCOMPLEX(self)->real, RCOMPLEX(other)->real);
>       |                  ^~~~~~~~
> statistics.c:67:32: note: each undeclared identifier is reported only once for each function it appears in
>    67 | # define RCOMPLEX(obj) (R_CAST(RComplex)(obj))
>       |                                ^~~~~~~~
> statistics.c:152:18: note: in expansion of macro ‘RCOMPLEX’
>   152 |     real = f_add(RCOMPLEX(self)->real, RCOMPLEX(other)->real);
>       |                  ^~~~~~~~
> statistics.c: In function ‘f_zero_p’:
> statistics.c:47:33: error: ‘RRational’ undeclared (first use in this function)
>    47 | # define RRATIONAL(obj) (R_CAST(RRational)(obj))
>       |                                 ^~~~~~~~~
> statistics.c:400:17: note: in expansion of macro ‘RRATIONAL’
>   400 |     VALUE num = RRATIONAL(x)->num;
>       |                 ^~~~~~~~~
> statistics.c: In function ‘rb_rational_plus’:
> statistics.c:47:33: error: ‘RRational’ undeclared (first use in this function)
>    47 | # define RRATIONAL(obj) (R_CAST(RRational)(obj))
>       |                                 ^~~~~~~~~
> statistics.c:613:17: note: in expansion of macro ‘RRATIONAL’
>   613 |     VALUE num = RRATIONAL(self)->num;
>       |                 ^~~~~~~~~
> statistics.c: In function ‘calculate_and_set_mean’:
> statistics.c:67:32: error: ‘RComplex’ undeclared (first use in this function)
>    67 | # define RCOMPLEX(obj) (R_CAST(RComplex)(obj))
>       |                                ^~~~~~~~
> statistics.c:751:24: note: in expansion of macro ‘RCOMPLEX’
>   751 |     VALUE const real = RCOMPLEX(sum)->real;
>       |                        ^~~~~~~~
> make[1]: *** [Makefile:245: statistics.o] Error 1


The full build log is available at
https://people.debian.org/~kanashiro/ruby3.0/round2/builds/3/ruby-enumerable-statistics/ruby-enumerable-statistics_2.0.1+dfsg-3+rebuild1633378917_amd64.build.txt
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