Paul Eggert 4e11e3d07a stdbit-h: don’t generate some dummy .o files ...

On recent GNU and other C23ish platforms, do not compile files
like lib/stdc_bit_ceil.c, as the corresponding .o files contain
nothing useful.
* m4/stdbit_h.m4 (gl_STDBIT_H):
Define the Automake condition GL_HAVE_STDBIT_H.
Quote cache variables in case the cache is bad.
* modules/stdc_bit_ceil, modules/stdc_bit_floor:
* modules/stdc_bit_width, modules/stdc_count_ones:
* modules/stdc_count_zeros, modules/stdc_first_leading_one:
* modules/stdc_first_leading_zero:
* modules/stdc_first_trailing_one:
* modules/stdc_first_trailing_zero, modules/stdc_has_single_bit:
* modules/stdc_leading_ones, modules/stdc_leading_zeros:
* modules/stdc_trailing_ones, modules/stdc_trailing_zeros:
Generate if !GL_HAVE_STDBIT_H, not if GL_GENERATE_STDBIT_H.

2026-03-16 15:17:58 -07:00

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