mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2025-08-08 18:24:04 +02:00
b532b9cecf
There are now C99 functions that the printf items want to use that may not be necessarily supported by the math.h that is shipped by the compiler, such as signbit(), isinf(), isnan() and isfinite() and their double, long and float counterparts. This checks for whether these functions are provided by the math.h shipped by the compiler, and builds the gnulib implementations of them if they cannot be found. Currently no attempt is made to check whether these, if available from the compiler's math.h, are compliant with the specs.
344 lines
8.4 KiB
Meson
344 lines
8.4 KiB
Meson
# glib enables -Werror=format-nonliteral by default, but the embedded gnulib
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# needs to handle user provided format strings.
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extra_gnulib_args = cc.get_supported_arguments([
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'-Wno-format-nonliteral', '-Wno-duplicated-branches'])
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math_h_config = configuration_data ()
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unneeded_funcs = [
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'ACOSF',
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'ACOSL',
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'ASINF',
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'ASINL',
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'ATAN2F',
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'ATANF',
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'ATANL',
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'CBRT',
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'CBRTF',
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'CBRTL',
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'CEIL',
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'CEILF',
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'CEILL',
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'COPYSIGN',
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'COPYSIGNF',
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'COPYSIGNL',
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'COSF',
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'COSHF',
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'COSL',
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'EXP2',
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'EXP2F',
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'EXP2L',
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'EXPF',
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'EXPL',
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'EXPM1',
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'EXPM1F',
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'EXPM1L',
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'FABSF',
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'FABSL',
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'FLOOR',
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'FLOORF',
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'FLOORL',
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'FMA',
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'FMAF',
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'FMAL',
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'FMOD',
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'FMODF',
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'FMODL',
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'FREXPF',
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'HYPOT',
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'HYPOTF',
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'HYPOTL',
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'ILOGB',
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'ILOGBF',
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'ILOGBL',
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'LDEXPF',
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'LOG',
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'LOG10',
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'LOG10F',
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'LOG10L',
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'LOG1P',
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'LOG1PF',
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'LOG1PL',
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'LOG2',
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'LOG2F',
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'LOG2L',
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'LOGB',
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'LOGBF',
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'LOGBL',
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'LOGF',
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'LOGL',
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'MODF',
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'MODFF',
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'MODFL',
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'POWF',
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'REMAINDER',
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'REMAINDERF',
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'REMAINDERL',
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'RINT',
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'RINTF',
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'RINTL',
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'ROUND',
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'ROUNDF',
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'ROUNDL',
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'SINF',
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'SINHF',
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'SINL',
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'SQRTF',
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'SQRTL',
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'TANF',
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'TANHF',
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'TANL',
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'TRUNC',
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'TRUNCF',
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'TRUNCL',
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]
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foreach f : unneeded_funcs
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math_h_config.set ('GNULIB_' + f, 0)
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# These are not used in practice, guarded by
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# the appropriate GNULIB_*, but meson config
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# processor doesn't know that
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math_h_config.set ('HAVE_' + f, 'variable not used')
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math_h_config.set ('REPLACE_' + f, 'variable not used')
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endforeach
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needed_funcs = [
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'FREXP',
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'FREXPL',
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'ISFINITE',
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'ISINF',
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'ISNAN',
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'ISNAND',
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'ISNANF',
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'ISNANL',
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'LDEXPL',
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'SIGNBIT',
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]
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foreach f : needed_funcs
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math_h_config.set ('GNULIB_' + f, 1)
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endforeach
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math_h_config.set ('GUARD_PREFIX', 'GL')
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decls_for_unused_funcs = [
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'ACOSL',
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'ASINL',
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'ATANL',
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'CBRTF',
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'CBRTL',
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'CEILF',
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'CEILL',
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'COPYSIGNF',
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'COSL',
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'EXP2',
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'EXP2F',
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'EXP2L',
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'EXPL',
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'EXPM1L',
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'FLOORF',
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'FLOORL',
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'LOG10L',
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'LOG2',
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'LOG2F',
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'LOG2L',
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'LOGB',
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'LOGL',
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'REMAINDER',
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'REMAINDERL',
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'RINTF',
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'ROUND',
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'ROUNDF',
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'ROUNDL',
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'SINL',
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'SQRTL',
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'TANL',
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'TRUNC',
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'TRUNCF',
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'TRUNCL',
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]
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foreach f : decls_for_unused_funcs
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math_h_config.set ('HAVE_DECL_' + f, 0)
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endforeach
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decls_for_used_funcs = [
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'frexpl',
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'ldexpl',
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]
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foreach f : decls_for_used_funcs
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compiles = cc.compiles('''#include <math.h>
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int main ()
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{
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(void) @0@;
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return 0;
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}
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'''.format (f))
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math_h_config.set ('HAVE_DECL_' + f.to_upper (), compiles ? 1 : 0)
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set_variable ('have_decl_' + f, compiles ? true : false)
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endforeach
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nan_tmpl = '''#include <math.h>
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#if __GNUC__ >= 4
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# undef @0@
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# define @0@(x) __builtin_isnan ((@1@)(x))
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#else
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# undef @0@
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# define @0@(x) isnan ((@1@)(x))
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#endif
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double x;
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int main () {return @0@ (x);}
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'''
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links = cc.links (nan_tmpl.format ('isnand', 'double'),
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dependencies : [libm])
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math_h_config.set ('HAVE_ISNAND', links ? 1 : 0)
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math_h_config.set ('HAVE_ISNAND_IN_LIBC', links ? 1 : 0)
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set_variable ('have_isnand', links)
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links = cc.links (nan_tmpl.format ('isnanl', 'long double'),
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dependencies : [libm])
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math_h_config.set ('HAVE_ISNANL', links ? 1 : 0)
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math_h_config.set ('HAVE_ISNANL_IN_LIBC', links ? 1 : 0)
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set_variable ('have_isnanl', links)
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links = cc.links ('''#include <math.h>
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double x;
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int y;
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int main () {return ldexp (x, y) < 1;}
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''',
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dependencies : [libm])
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math_h_config.set ('HAVE_LDEXP', links ? 1 : 0)
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math_h_config.set ('HAVE_LDEXP_IN_LIBC', links ? 1 : 0)
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set_variable ('have_ldexp', links)
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links = cc.links ('''#include <math.h>
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long double x;
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int main () {return ldexpl (x, -1) > 0;}
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''',
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dependencies : [libm])
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math_h_config.set ('HAVE_LDEXPL', links ? 1 : 0)
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math_h_config.set ('HAVE_LDEXPL_IN_LIBC', links ? 1 : 0)
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set_variable ('have_ldexpl', links)
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links = cc.links ('''#include <math.h>
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double x;
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int main () {int e; return frexp (x, &e) > 0;}
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''',
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dependencies : [libm])
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math_h_config.set ('HAVE_FREXP', links ? 1 : 0)
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math_h_config.set ('HAVE_FREXP_IN_LIBC', links ? 1 : 0)
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set_variable ('have_frexp', links)
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links = cc.links ('''#include <math.h>
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long double x;
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int main () {int e; return frexpl (x, &e) > 0;}
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''',
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dependencies : [libm])
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math_h_config.set ('HAVE_FREXPL', links ? 1 : 0)
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math_h_config.set ('HAVE_FREXPL_IN_LIBC', links ? 1 : 0)
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set_variable ('have_frexpl', links)
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math_h_config.set ('INCLUDE_NEXT_AS_FIRST_DIRECTIVE', 'include')
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math_h_config.set ('NEXT_AS_FIRST_DIRECTIVE_MATH_H', '<math.h>')
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math_h_config.set ('PRAGMA_COLUMNS', '')
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math_h_config.set ('PRAGMA_SYSTEM_HEADER', '')
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compiles = cc.compiles ('''
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#include <math.h>
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/* Solaris 10 has a broken definition of NAN. Other platforms
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fail to provide NAN, or provide it only in C99 mode; this
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test only needs to fail when NAN is provided but wrong. */
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int main () {
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float f = 1.0f;
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#ifdef NAN
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f = NAN;
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#endif
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return f == 0;
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}
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''')
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math_h_config.set ('REPLACE_NAN', compiles ? 0 : 1)
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if have_frexp
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subdir ('gl_cv_func_frexp_works')
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else
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gl_cv_func_frexp_works = false
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gl_cv_func_frexp_broken_beyond_repair = true
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endif
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if have_frexpl
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subdir ('gl_cv_func_frexpl_works')
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else
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gl_cv_func_frexpl_works = false
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gl_cv_func_frexpl_broken_beyond_repair = true
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endif
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if not gl_cv_func_frexp_works and gl_cv_func_frexp_broken_beyond_repair
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error ('frexp() is missing or broken beyond repair, and we have nothing to replace it with')
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endif
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if not gl_cv_func_frexpl_works and gl_cv_func_frexpl_broken_beyond_repair
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error ('frexpl() is missing or broken beyond repair, and we have nothing to replace it with')
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endif
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math_h_config.set ('REPLACE_FREXP', gl_cv_func_frexp_works ? 0 : 1)
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math_h_config.set ('REPLACE_FREXPL', gl_cv_func_frexpl_works ? 0 : 1)
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math_h_config.set ('HAVE_DECL_FREXPL', gl_cv_func_frexpl_decl ? 0 : 1)
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math_h_config.set ('REPLACE_ITOLD', 0)
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math_h_config.set ('REPLACE_HUGE_VAL', 0)
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math_h_config.set ('REPLACE_SIGNBIT_USING_GCC', 0)
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if have_ldexpl
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subdir ('gl_cv_func_ldexpl_works')
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else
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gl_cv_func_ldexpl_works = false
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endif
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math_h_config.set ('REPLACE_LDEXPL', gl_cv_func_ldexpl_works ? 0 : 1)
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math_h_config.set ('HAVE_DECL_LDEXPL', gl_cv_func_ldexpl_decl ? 0 : 1)
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inf_tmpl = '''#include <math.h>
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double x;
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int main () {return @0@ (x);}
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'''
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other_needed_math_sources = []
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# Some compilers may not have isfinite, isinf available
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foreach f: ['isfinite', 'isinf', 'isnan', 'isnanf', 'signbit']
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links = cc.links (inf_tmpl.format('@0@'.format(f)),
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dependencies : [libm])
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math_h_config.set ('HAVE_@0@'.format(f.to_upper()), links ? 1 : 0)
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math_h_config.set ('HAVE_@0@_IN_LIBC'.format(f.to_upper()), links ? 1 : 0)
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math_h_config.set ('REPLACE_@0@'.format(f.to_upper()), links ? 0 : 1)
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set_variable ('have_@0@'.format(f), links)
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if not links
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if f == 'signbit'
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other_needed_math_sources += [ 'signbitd.c', 'signbitf.c', 'signbitl.c' ]
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elif f != 'isfinite' and f != 'isnan'
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other_needed_math_sources += [ '@0@.c'.format(f) ]
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endif
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endif
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endforeach
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math_h = configure_file (input: 'gnulib_math.h.in',
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output: 'gnulib_math.h',
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configuration: math_h_config)
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gnulib_sources = ['asnprintf.c', 'printf.c', 'printf-args.c', 'printf-parse.c', 'printf-frexp.c', 'printf-frexpl.c', 'isnand.c', 'isnanl.c', 'vasnprintf.c']
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if not gl_cv_func_frexp_works
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gnulib_sources += ['frexp.c']
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endif
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if not gl_cv_func_frexpl_works
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gnulib_sources += ['frexpl.c']
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endif
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gnulib_sources += other_needed_math_sources
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gnulib_lib = static_library('gnulib', gnulib_sources,
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dependencies : [libm],
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include_directories : [configinc, glibinc, include_directories ('.')],
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pic : true,
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c_args : ['-DGCC_LINT=1', '-DLIBDIR="@0@"'.format(get_option('libdir')), '-DGLIB_COMPILATION', '-DG_LOG_DOMAIN="GLib"' ] + glib_hidden_visibility_args + extra_gnulib_args)
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gnulib_libm_dependency = [libm]
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