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167 lines
6.9 KiB
Diff
167 lines
6.9 KiB
Diff
From 49348beafe9ba150c9bd48595b3f372299bddbb0 Mon Sep 17 00:00:00 2001
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From: Joseph Myers <joseph@codesourcery.com>
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Date: Tue, 17 Mar 2020 22:57:42 +0000
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Subject: [PATCH] Fix build with GCC 10 when long double = double.
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On platforms where long double has the same ABI as double, glibc
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defines long double functions as aliases for the corresponding double
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functions. The declarations of those functions in <math.h> are
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disabled to avoid problems with aliases having incompatible types, but
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GCC 10 now gives errors for incompatible types when the long double
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function is known to GCC as a built-in function, not just when there
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is an incompatible header declaration.
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This patch fixes those errors by using appropriate
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-fno-builtin-<function> options to compile the double functions. The
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list of CFLAGS-* settings is an appropriately adapted version of that
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in sysdeps/ieee754/ldbl-opt/Makefile used there for building nldbl-*.c
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files; in particular, the options are used even if GCC does not
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currently have a built-in function of a given function, so that adding
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such a built-in function in future will not break the glibc build.
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Thus, various of the CFLAGS-* settings are only for future-proofing
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and may not currently be needed (and it's possible some could be
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irrelevant for other reasons).
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Tested with build-many-glibcs.py for arm-linux-gnueabi (compilers and
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glibcs builds), where it fixes the build that previously failed.
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---
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math/Makefile | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 122 insertions(+)
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diff --git a/math/Makefile b/math/Makefile
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index 84a8b94c74..0a5a40430e 100644
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--- a/math/Makefile
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+++ b/math/Makefile
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@@ -650,6 +650,128 @@ ifneq ($(long-double-fcts),yes)
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# We won't compile the `long double' code at all. Tell the `double' code
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# to define aliases for the `FUNCl' names.
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math-CPPFLAGS += -DNO_LONG_DOUBLE
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+# GCC 10 diagnoses aliases with types conflicting with built-in
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+# functions.
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+CFLAGS-w_acos.c += -fno-builtin-acosl
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+CFLAGS-w_acosh.c += -fno-builtin-acoshl
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+CFLAGS-w_asin.c += -fno-builtin-asinl
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+CFLAGS-s_asinh.c += -fno-builtin-asinhl
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+CFLAGS-s_atan.c += -fno-builtin-atanl
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+CFLAGS-w_atan2.c += -fno-builtin-atan2l
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+CFLAGS-w_atanh.c += -fno-builtin-atanhl
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+CFLAGS-s_cabs.c += -fno-builtin-cabsl
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+CFLAGS-s_cacos.c += -fno-builtin-cacosl
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+CFLAGS-s_cacosh.c += -fno-builtin-cacoshl
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+CFLAGS-s_canonicalize.c += -fno-builtin-canonicalizel
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+CFLAGS-s_carg.c += -fno-builtin-cargl
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+CFLAGS-s_casin.c += -fno-builtin-casinl
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+CFLAGS-s_casinh.c += -fno-builtin-casinhl
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+CFLAGS-s_catan.c += -fno-builtin-catanl
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+CFLAGS-s_catanh.c += -fno-builtin-catanhl
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+CFLAGS-s_cbrt.c += -fno-builtin-cbrtl
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+CFLAGS-s_ccos.c += -fno-builtin-ccosl
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+CFLAGS-s_ccosh.c += -fno-builtin-ccoshl
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+CFLAGS-s_ceil.c += -fno-builtin-ceill
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+CFLAGS-s_cexp.c += -fno-builtin-cexpl
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+CFLAGS-s_cimag.c += -fno-builtin-cimagl
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+CFLAGS-s_clog.c += -fno-builtin-clogl
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+CFLAGS-s_clog10.c += -fno-builtin-clog10l
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+CFLAGS-s_conj.c += -fno-builtin-conjl
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+CFLAGS-s_copysign.c += -fno-builtin-copysignl
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+CFLAGS-s_cos.c += -fno-builtin-cosl
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+CFLAGS-w_cosh.c += -fno-builtin-coshl
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+CFLAGS-s_cpow.c += -fno-builtin-cpowl
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+CFLAGS-s_cproj.c += -fno-builtin-cprojl
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+CFLAGS-s_creal.c += -fno-builtin-creall
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+CFLAGS-s_csin.c += -fno-builtin-csinl
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+CFLAGS-s_csinh.c += -fno-builtin-csinhl
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+CFLAGS-s_csqrt.c += -fno-builtin-csqrtl
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+CFLAGS-s_ctan.c += -fno-builtin-ctanl
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+CFLAGS-s_ctanh.c += -fno-builtin-ctanhl
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+CFLAGS-s_dadd.c += -fno-builtin-daddl
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+CFLAGS-s_ddiv.c += -fno-builtin-ddivl
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+CFLAGS-s_dmul.c += -fno-builtin-dmull
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+CFLAGS-s_dsub.c += -fno-builtin-dsubl
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+CFLAGS-s_erf.c += -fno-builtin-erfl
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+CFLAGS-s_erfc.c += -fno-builtin-erfcl
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+CFLAGS-e_exp.c += -fno-builtin-expl
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+CFLAGS-w_exp10.c += -fno-builtin-exp10l
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+CFLAGS-e_exp2.c += -fno-builtin-exp2l
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+CFLAGS-s_expm1.c += -fno-builtin-expm1l
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+CFLAGS-s_fabs.c += -fno-builtin-fabsl
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+CFLAGS-s_fadd.c += -fno-builtin-faddl
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+CFLAGS-s_fdim.c += -fno-builtin-fdiml
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+CFLAGS-s_fdiv.c += -fno-builtin-fdivl
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+CFLAGS-s_finite.c += -fno-builtin-finitel
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+CFLAGS-s_floor.c += -fno-builtin-floorl
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+CFLAGS-s_fma.c += -fno-builtin-fmal
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+CFLAGS-s_fmax.c += -fno-builtin-fmaxl
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+CFLAGS-s_fmaxmag.c += -fno-builtin-fmaxmagl
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+CFLAGS-s_fmin.c += -fno-builtin-fminl
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+CFLAGS-s_fminmag.c += -fno-builtin-fminmagl
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+CFLAGS-w_fmod.c += -fno-builtin-fmodl
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+CFLAGS-s_fmul.c += -fno-builtin-fmull
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+CFLAGS-s_frexp.c += -fno-builtin-frexpl
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+CFLAGS-s_fromfp.c += -fno-builtin-fromfpl
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+CFLAGS-s_fromfpx.c += -fno-builtin-fromfpxl
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+CFLAGS-s_fsub.c += -fno-builtin-fsubl
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+CFLAGS-s_gamma.c += -fno-builtin-gammal
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+CFLAGS-s_getpayload.c += -fno-builtin-getpayloadl
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+CFLAGS-w_hypot.c += -fno-builtin-hypotl
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+CFLAGS-w_ilogb.c += -fno-builtin-ilogbl
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+CFLAGS-s_isinf.c += -fno-builtin-isinfl
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+CFLAGS-s_isnan.c += -fno-builtin-isnanl
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+CFLAGS-w_j0.c += -fno-builtin-j0l
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+CFLAGS-w_j1.c += -fno-builtin-j1l
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+CFLAGS-w_jn.c += -fno-builtin-jnl
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+CFLAGS-s_ldexp.c += -fno-builtin-ldexpl
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+CFLAGS-w_lgamma.c += -fno-builtin-lgammal
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+CFLAGS-w_lgamma_r.c += -fno-builtin-lgammal_r
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+CFLAGS-w_llogb.c += -fno-builtin-llogbl
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+CFLAGS-s_llrint.c += -fno-builtin-llrintl
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+CFLAGS-s_llround.c += -fno-builtin-llroundl
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+CFLAGS-e_log.c += -fno-builtin-logl
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+CFLAGS-w_log10.c += -fno-builtin-log10l
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+CFLAGS-w_log1p.c += -fno-builtin-log1pl
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+CFLAGS-e_log2.c += -fno-builtin-log2l
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+CFLAGS-s_logb.c += -fno-builtin-logbl
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+CFLAGS-s_lrint.c += -fno-builtin-lrintl
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+CFLAGS-s_lround.c += -fno-builtin-lroundl
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+CFLAGS-s_modf.c += -fno-builtin-modfl
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+CFLAGS-s_nan.c += -fno-builtin-nanl
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+CFLAGS-s_nearbyint.c += -fno-builtin-nearbyintl
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+CFLAGS-s_nextafter.c += -fno-builtin-nextafterl
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+CFLAGS-s_nextdown.c += -fno-builtin-nextdownl
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+CFLAGS-s_nexttoward.c += -fno-builtin-nexttoward -fno-builtin-nexttowardl
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+CFLAGS-s_nexttowardf.c += -fno-builtin-nexttowardf
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+CFLAGS-s_nextup.c += -fno-builtin-nextupl
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+CFLAGS-e_pow.c += -fno-builtin-powl
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+CFLAGS-w_remainder.c += -fno-builtin-remainderl -fno-builtin-dreml
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+CFLAGS-s_remquo.c += -fno-builtin-remquol
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+CFLAGS-s_rint.c += -fno-builtin-rintl
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+CFLAGS-s_round.c += -fno-builtin-roundl
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+CFLAGS-s_roundeven.c += -fno-builtin-roundevenl
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+CFLAGS-w_scalb.c += -fno-builtin-scalbl
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+CFLAGS-w_scalbln.c += -fno-builtin-scalblnl
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+CFLAGS-s_scalbn.c += -fno-builtin-scalbnl
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+CFLAGS-s_setpayload.c += -fno-builtin-setpayloadl
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+CFLAGS-s_setpayloadsig.c += -fno-builtin-setpayloadsigl
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+CFLAGS-s_significand.c += -fno-builtin-significandl
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+CFLAGS-s_sin.c += -fno-builtin-sinl
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+CFLAGS-s_sincos.c += -fno-builtin-sincosl
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+CFLAGS-w_sinh.c += -fno-builtin-sinhl
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+CFLAGS-w_sqrt.c += -fno-builtin-sqrtl
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+CFLAGS-s_tan.c += -fno-builtin-tanl
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+CFLAGS-s_tanh.c += -fno-builtin-tanhl
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+CFLAGS-w_tgamma.c += -fno-builtin-tgammal
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+CFLAGS-s_totalorder.c += -fno-builtin-totalorderl
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+CFLAGS-s_totalordermag.c += -fno-builtin-totalordermagl
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+CFLAGS-s_trunc.c += -fno-builtin-truncl
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+CFLAGS-s_ufromfp.c += -fno-builtin-ufromfpl
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+CFLAGS-s_ufromfpx.c += -fno-builtin-ufromfpxl
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+CFLAGS-s_y0.c += -fno-builtin-y0l
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+CFLAGS-s_y1.c += -fno-builtin-y1l
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+CFLAGS-s_yn.c += -fno-builtin-ynl
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endif
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# These files quiet sNaNs in a way that is optimized away without
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--
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2.25.1
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