AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-09 14:50:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix build with GCC 10 when long double = double.

Browse Source 
On platforms where long double has the same ABI as double, glibc
defines long double functions as aliases for the corresponding double
functions.  The declarations of those functions in <math.h> are
disabled to avoid problems with aliases having incompatible types, but
GCC 10 now gives errors for incompatible types when the long double
function is known to GCC as a built-in function, not just when there
is an incompatible header declaration.

This patch fixes those errors by using appropriate
-fno-builtin-<function> options to compile the double functions.  The
list of CFLAGS-* settings is an appropriately adapted version of that
in sysdeps/ieee754/ldbl-opt/Makefile used there for building nldbl-*.c
files; in particular, the options are used even if GCC does not
currently have a built-in function of a given function, so that adding
such a built-in function in future will not break the glibc build.
Thus, various of the CFLAGS-* settings are only for future-proofing
and may not currently be needed (and it's possible some could be
irrelevant for other reasons).

Tested with build-many-glibcs.py for arm-linux-gnueabi (compilers and
glibcs builds), where it fixes the build that previously failed.

(cherry picked from commit 49348beafe)
This commit is contained in:
Joseph Myers 2020-03-17 22:57:42 +00:00 committed by Szabolcs Nagy
parent ece4e11d55
commit de371d1581
1 changed files with 122 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

122
math/Makefile
View File

@ -644,6 +644,128 @@ ifneq ($(long-double-fcts),yes)
# We won't compile the `long double' code at all. Tell the `double' code
# to define aliases for the `FUNCl' names.
math-CPPFLAGS += -DNO_LONG_DOUBLE
# GCC 10 diagnoses aliases with types conflicting with built-in
# functions.
CFLAGS-w_acos.c += -fno-builtin-acosl
CFLAGS-w_acosh.c += -fno-builtin-acoshl
CFLAGS-w_asin.c += -fno-builtin-asinl
CFLAGS-s_asinh.c += -fno-builtin-asinhl
CFLAGS-s_atan.c += -fno-builtin-atanl
CFLAGS-w_atan2.c += -fno-builtin-atan2l
CFLAGS-w_atanh.c += -fno-builtin-atanhl
CFLAGS-s_cabs.c += -fno-builtin-cabsl
CFLAGS-s_cacos.c += -fno-builtin-cacosl
CFLAGS-s_cacosh.c += -fno-builtin-cacoshl
CFLAGS-s_canonicalize.c += -fno-builtin-canonicalizel
CFLAGS-s_carg.c += -fno-builtin-cargl
CFLAGS-s_casin.c += -fno-builtin-casinl
CFLAGS-s_casinh.c += -fno-builtin-casinhl
CFLAGS-s_catan.c += -fno-builtin-catanl
CFLAGS-s_catanh.c += -fno-builtin-catanhl
CFLAGS-s_cbrt.c += -fno-builtin-cbrtl
CFLAGS-s_ccos.c += -fno-builtin-ccosl
CFLAGS-s_ccosh.c += -fno-builtin-ccoshl
CFLAGS-s_ceil.c += -fno-builtin-ceill
CFLAGS-s_cexp.c += -fno-builtin-cexpl
CFLAGS-s_cimag.c += -fno-builtin-cimagl
CFLAGS-s_clog.c += -fno-builtin-clogl
CFLAGS-s_clog10.c += -fno-builtin-clog10l
CFLAGS-s_conj.c += -fno-builtin-conjl
CFLAGS-s_copysign.c += -fno-builtin-copysignl
CFLAGS-s_cos.c += -fno-builtin-cosl
CFLAGS-w_cosh.c += -fno-builtin-coshl
CFLAGS-s_cpow.c += -fno-builtin-cpowl
CFLAGS-s_cproj.c += -fno-builtin-cprojl
CFLAGS-s_creal.c += -fno-builtin-creall
CFLAGS-s_csin.c += -fno-builtin-csinl
CFLAGS-s_csinh.c += -fno-builtin-csinhl
CFLAGS-s_csqrt.c += -fno-builtin-csqrtl
CFLAGS-s_ctan.c += -fno-builtin-ctanl
CFLAGS-s_ctanh.c += -fno-builtin-ctanhl
CFLAGS-s_dadd.c += -fno-builtin-daddl
CFLAGS-s_ddiv.c += -fno-builtin-ddivl
CFLAGS-s_dmul.c += -fno-builtin-dmull
CFLAGS-s_dsub.c += -fno-builtin-dsubl
CFLAGS-s_erf.c += -fno-builtin-erfl
CFLAGS-s_erfc.c += -fno-builtin-erfcl
CFLAGS-e_exp.c += -fno-builtin-expl
CFLAGS-w_exp10.c += -fno-builtin-exp10l
CFLAGS-e_exp2.c += -fno-builtin-exp2l
CFLAGS-s_expm1.c += -fno-builtin-expm1l
CFLAGS-s_fabs.c += -fno-builtin-fabsl
CFLAGS-s_fadd.c += -fno-builtin-faddl
CFLAGS-s_fdim.c += -fno-builtin-fdiml
CFLAGS-s_fdiv.c += -fno-builtin-fdivl
CFLAGS-s_finite.c += -fno-builtin-finitel
CFLAGS-s_floor.c += -fno-builtin-floorl
CFLAGS-s_fma.c += -fno-builtin-fmal
CFLAGS-s_fmax.c += -fno-builtin-fmaxl
CFLAGS-s_fmaxmag.c += -fno-builtin-fmaxmagl
CFLAGS-s_fmin.c += -fno-builtin-fminl
CFLAGS-s_fminmag.c += -fno-builtin-fminmagl
CFLAGS-w_fmod.c += -fno-builtin-fmodl
CFLAGS-s_fmul.c += -fno-builtin-fmull
CFLAGS-s_frexp.c += -fno-builtin-frexpl
CFLAGS-s_fromfp.c += -fno-builtin-fromfpl
CFLAGS-s_fromfpx.c += -fno-builtin-fromfpxl
CFLAGS-s_fsub.c += -fno-builtin-fsubl
CFLAGS-s_gamma.c += -fno-builtin-gammal
CFLAGS-s_getpayload.c += -fno-builtin-getpayloadl
CFLAGS-w_hypot.c += -fno-builtin-hypotl
CFLAGS-w_ilogb.c += -fno-builtin-ilogbl
CFLAGS-s_isinf.c += -fno-builtin-isinfl
CFLAGS-s_isnan.c += -fno-builtin-isnanl
CFLAGS-w_j0.c += -fno-builtin-j0l
CFLAGS-w_j1.c += -fno-builtin-j1l
CFLAGS-w_jn.c += -fno-builtin-jnl
CFLAGS-s_ldexp.c += -fno-builtin-ldexpl
CFLAGS-w_lgamma.c += -fno-builtin-lgammal
CFLAGS-w_lgamma_r.c += -fno-builtin-lgammal_r
CFLAGS-w_llogb.c += -fno-builtin-llogbl
CFLAGS-s_llrint.c += -fno-builtin-llrintl
CFLAGS-s_llround.c += -fno-builtin-llroundl
CFLAGS-e_log.c += -fno-builtin-logl
CFLAGS-w_log10.c += -fno-builtin-log10l
CFLAGS-w_log1p.c += -fno-builtin-log1pl
CFLAGS-e_log2.c += -fno-builtin-log2l
CFLAGS-s_logb.c += -fno-builtin-logbl
CFLAGS-s_lrint.c += -fno-builtin-lrintl
CFLAGS-s_lround.c += -fno-builtin-lroundl
CFLAGS-s_modf.c += -fno-builtin-modfl
CFLAGS-s_nan.c += -fno-builtin-nanl
CFLAGS-s_nearbyint.c += -fno-builtin-nearbyintl
CFLAGS-s_nextafter.c += -fno-builtin-nextafterl
CFLAGS-s_nextdown.c += -fno-builtin-nextdownl
CFLAGS-s_nexttoward.c += -fno-builtin-nexttoward -fno-builtin-nexttowardl
CFLAGS-s_nexttowardf.c += -fno-builtin-nexttowardf
CFLAGS-s_nextup.c += -fno-builtin-nextupl
CFLAGS-e_pow.c += -fno-builtin-powl
CFLAGS-w_remainder.c += -fno-builtin-remainderl -fno-builtin-dreml
CFLAGS-s_remquo.c += -fno-builtin-remquol
CFLAGS-s_rint.c += -fno-builtin-rintl
CFLAGS-s_round.c += -fno-builtin-roundl
CFLAGS-s_roundeven.c += -fno-builtin-roundevenl
CFLAGS-w_scalb.c += -fno-builtin-scalbl
CFLAGS-w_scalbln.c += -fno-builtin-scalblnl
CFLAGS-s_scalbn.c += -fno-builtin-scalbnl
CFLAGS-s_setpayload.c += -fno-builtin-setpayloadl
CFLAGS-s_setpayloadsig.c += -fno-builtin-setpayloadsigl
CFLAGS-s_significand.c += -fno-builtin-significandl
CFLAGS-s_sin.c += -fno-builtin-sinl
CFLAGS-s_sincos.c += -fno-builtin-sincosl
CFLAGS-w_sinh.c += -fno-builtin-sinhl
CFLAGS-w_sqrt.c += -fno-builtin-sqrtl
CFLAGS-s_tan.c += -fno-builtin-tanl
CFLAGS-s_tanh.c += -fno-builtin-tanhl
CFLAGS-w_tgamma.c += -fno-builtin-tgammal
CFLAGS-s_totalorder.c += -fno-builtin-totalorderl
CFLAGS-s_totalordermag.c += -fno-builtin-totalordermagl
CFLAGS-s_trunc.c += -fno-builtin-truncl
CFLAGS-s_ufromfp.c += -fno-builtin-ufromfpl
CFLAGS-s_ufromfpx.c += -fno-builtin-ufromfpxl
CFLAGS-s_y0.c += -fno-builtin-y0l
CFLAGS-s_y1.c += -fno-builtin-y1l
CFLAGS-s_yn.c += -fno-builtin-ynl
endif
# These files quiet sNaNs in a way that is optimized away without