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e59c94fa0e
If a platform does not define "long-double-fcts = yes" in its Makefiles and it does define __NO_LONG_DOUBLE_MATH in its installed headers, it will currently create exported symbols for __finitel, __isinfl, and __isnanl that can't be reached from userspace by correct use of the finite(), isinf(), or isnan() macros in <math.h>. To avoid this situation, by default for such platforms we now no longer export these symbols, thus causing appropriate link-time errors. However, for platforms that previously exported these symbols, we continue to do so as compat symbols; this is enabled by adding LDBL_CLASSIFY_COMPAT to math_private.h for the platform. For tile, remove the now-unnecessary exports of those functions from libc and libm.
39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
#ifndef NIO2_MATH_PRIVATE_H
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#define NIO2_MATH_PRIVATE_H 1
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/* Suppress use of exceptions here to avoid build errors if the FE_*
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macros aren't defined. Only allow rounding modes implemented for Nios II.
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This does mean that some code will silently fail to report exceptions,
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set rounding mode as expected, etc., but it allows math code to compile
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that otherwise wouldn't (such as math/s_fma.c) and so is valuable.
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We intentionally ignore the "exception" arguments of functions that
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take an exception, since we can't even evaluate the argument
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without causing a build failure. The extra level of statement
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expression wrapping avoids "statement with no effect" warnings.
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Since the callers don't check for errors anyway, we just claim
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success in every case.
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The overrides for libc_ functions must happen before we include
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the generic math_private.h, and the overrides for regular
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<fenv.h> functions must happen afterwards, to avoid clashing with
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the declarations of those functions. */
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#define libc_fesetround(rnd) ({ 0; })
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#define libc_fetestexcept(exc) ({ 0; })
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#define libc_feholdexcept_setround(env, exc) ({ (void) (env); 0; })
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#define libc_feupdateenv_test(env, exc) ({ (void) (env); 0; })
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/* Enable __finitel, __isinfl, and __isnanl for binary compatibility
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when built without long double support. */
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#define LDBL_CLASSIFY_COMPAT 1
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#include_next <math_private.h>
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#define feraiseexcept(excepts) ({ 0; })
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#define __feraiseexcept(excepts) ({ 0; })
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#define feclearexcept(exc) ({ 0; })
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#endif
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