math/Makefile

   1 # Copyright (C) 1996-2017 Free Software Foundation, Inc.
   2 # This file is part of the GNU C Library.
   3
   4 # The GNU C Library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Lesser General Public
   6 # License as published by the Free Software Foundation; either
   7 # version 2.1 of the License, or (at your option) any later version.
   8
   9 # The GNU C Library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Lesser General Public License for more details.
  13
  14 # You should have received a copy of the GNU Lesser General Public
  15 # License along with the GNU C Library; if not, see
  16 # <http://www.gnu.org/licenses/>.
  17
  18 # Makefile for the math library.
  19
  20 subdir          := math
  21
  22 include ../Makeconfig
  23
  24 # Installed header files.
  25 headers         := math.h bits/mathcalls.h bits/mathinline.h bits/huge_val.h \
  26                    bits/huge_valf.h bits/huge_vall.h bits/inf.h bits/nan.h \
  27                    fpu_control.h complex.h bits/cmathcalls.h fenv.h \
  28                    bits/fenv.h bits/fenvinline.h bits/mathdef.h tgmath.h \
  29                    bits/math-finite.h bits/math-vector.h \
  30                    bits/libm-simd-decl-stubs.h bits/iscanonical.h \
  31                    bits/flt-eval-method.h bits/fp-fast.h bits/fp-logb.h \
  32                    bits/long-double.h
  33
  34 # FPU support code.
  35 aux             := setfpucw fpu_control
  36
  37 # Build the -lm library.
  38
  39 extra-libs      := libm
  40 extra-libs-others = $(extra-libs)
  41
  42 libm-support = s_lib_version s_matherr s_signgam                        \
  43                fclrexcpt fgetexcptflg fraiseexcpt fsetexcptflg          \
  44                ftestexcept fegetround fesetround fegetenv feholdexcpt   \
  45                fesetenv feupdateenv t_exp fedisblxcpt feenablxcpt       \
  46                fegetexcept fesetexcept fetestexceptflag fegetmode       \
  47                fesetmode
  48
  49 # Wrappers for these functions generated per type using a file named
  50 # <func>_template.c and the appropriate math-type-macros-<TYPE>.h.
  51 gen-libm-calls = cargF conjF cimagF crealF cabsF s_cacosF                 \
  52                  s_cacoshF s_ccosF s_ccoshF s_casinF s_csinF s_casinhF    \
  53                  k_casinhF s_csinhF k_casinhF s_csinhF s_catanhF s_catanF \
  54                  s_ctanF s_ctanhF s_cexpF s_clogF s_cprojF s_csqrtF       \
  55                  s_cpowF s_clog10F s_fdimF s_nextdownF s_fmaxF s_fminF    \
  56                  s_nanF s_iseqsigF s_canonicalizeF w_ilogbF w_llogbF      \
  57                  w_log1pF w_scalblnF s_fmaxmagF s_fminmagF w_acosF        \
  58                  w_acoshF w_asinF w_atan2F w_atanhF w_coshF w_exp10F      \
  59                  w_exp2F w_fmodF w_hypotF w_j0F w_j1F w_jnF w_logF        \
  60                  w_log10F w_log2F w_powF w_remainderF w_sinhF w_sqrtF     \
  61                  w_tgammaF w_lgammaF w_lgammaF_r w_expF
  62
  63 libm-calls =                                                              \
  64         e_acosF e_acoshF e_asinF e_atan2F e_atanhF e_coshF e_expF e_fmodF \
  65         e_hypotF e_j0F e_j1F e_jnF e_lgammaF_r e_logF e_log10F e_powF     \
  66         e_rem_pio2F e_remainderF e_scalbF e_sinhF e_sqrtF e_gammaF_r      \
  67         e_ilogbF                                                          \
  68         k_cosF k_sinF k_tanF s_asinhF s_atanF s_cbrtF                     \
  69         s_ceilF s_cosF s_erfF s_expm1F s_fabsF                            \
  70         s_floorF s_log1pF s_logbF                                 \
  71         s_nextafterF s_nexttowardF s_rintF s_scalblnF                     \
  72         s_significandF s_sinF s_tanF s_tanhF                              \
  73         s_fpclassifyF s_truncF                                            \
  74         s_remquoF e_log2F e_exp2F s_roundF s_nearbyintF s_sincosF         \
  75         s_fmaF s_lrintF s_llrintF s_lroundF s_llroundF e_exp10F           \
  76         s_issignalingF $(calls:s_%=m_%) x2y2m1F                           \
  77         gamma_productF lgamma_negF lgamma_productF                        \
  78         s_nextupF s_totalorderF s_totalordermagF s_getpayloadF            \
  79         s_setpayloadF s_setpayloadsigF s_roundevenF s_fromfpF s_ufromfpF  \
  80         s_fromfpxF s_ufromfpxF $(gen-libm-calls)
  81
  82 libm-compat-calls =                                                     \
  83         w_acosF_compat w_acoshF_compat w_asinF_compat w_atan2F_compat   \
  84         w_atanhF_compat w_coshF_compat w_exp2F_compat w_exp10F_compat   \
  85         w_fmodF_compat w_hypotF_compat w_j0F_compat w_j1F_compat        \
  86         w_jnF_compat w_log2F_compat w_log10F_compat w_logF_compat       \
  87         w_powF_compat w_remainderF_compat w_scalbF_compat               \
  88         w_sinhF_compat w_sqrtF_compat w_tgammaF_compat                  \
  89         w_lgammaF_r_compat w_lgammaF_compat2 w_expF_compat              \
  90         w_lgamma_compatF k_standardF
  91
  92 # Type specific routine support.
  93 #
  94 # The following three variables control what is included for each type:
  95 #
  96 # type-floatN-suffix = The suffix of the type
  97 # type-floatN-routines = Type specific support objects
  98 # type-floatN-yes = If the type is supported, evaluates to floatN
  99 #
 100 # Finally, note that types is an intentionally recursive variable.
 101 # We only know the full set of supported types for the target machine
 102 # after the Rules makefile has been parsed.
 103 types = $(type-ldouble-$(long-double-fcts)) double float
 104
 105 # long double support
 106 type-ldouble-suffix := l
 107 type-ldouble-routines := t_sincosl k_sincosl s_iscanonicall
 108 type-ldouble-yes := ldouble
 109
 110 # double support
 111 type-double-suffix :=
 112 type-double-routines := branred doasin dosincos halfulp mpa mpatan2     \
 113                        mpatan mpexp mplog mpsqrt mptan sincos32 slowexp \
 114                        slowpow sincostab k_rem_pio2
 115
 116 # float support
 117 type-float-suffix := f
 118 type-float-routines := k_rem_pio2f
 119
 120
 121 # Apply suffix to each type in arg 1
 122 type-foreach = $(foreach t,$(types),$(subst F,$(type-$(t)-suffix),$(1)))
 123
 124 libm-routines = $(strip $(libm-support)                                 \
 125                         $(call type-foreach, $(libm-compat-calls))      \
 126                         $(call type-foreach, $(libm-calls))             \
 127                         $(foreach t, $(types), $(type-$(t)-routines)))  \
 128
 129 # These functions are in libc instead of libm because __printf_fp
 130 # calls them, so any program using printf will need them linked in,
 131 # and we don't want to have to link every program with -lm.
 132 # In libm-calls (above), list m_foo in place of s_foo for any
 133 # routine that should be compiled separately for its libc and libm versions.
 134 calls = s_isinfF s_isnanF s_finiteF s_copysignF s_modfF s_scalbnF s_frexpF \
 135         s_signbitF $(gen-calls)
 136 gen-calls = s_ldexpF
 137 generated += $(foreach s,.c .S,$(call type-foreach, $(calls:s_%=m_%$(s))))
 138 routines = $(call type-foreach, $(calls))
 139
 140 ifeq ($(build-mathvec),yes)
 141 # We need to install libm.so and libm.a as linker scripts
 142 # for transparent use of vector math library.
 143 install-lib-ldscripts := libm.so libm.a
 144 install-others = $(inst_libdir)/libm.so $(inst_libdir)/libm.a
 145 $(inst_libdir)/libm.so: $(common-objpfx)format.lds \
 146                         $(libm) \
 147                         $(libmvec) \
 148                         $(+force)
 149         (echo '/* GNU ld script'; echo '*/';\
 150          cat $<; \
 151          echo 'GROUP ( $(slibdir)/libm.so$(libm.so-version) ' \
 152               'AS_NEEDED ( $(libdir)/libmvec_nonshared.a $(slibdir)/libmvec.so$(libmvec.so-version) ) )' \
 153         ) > $@.new
 154         mv -f $@.new $@
 155
 156 $(inst_libdir)/libm-$(version).a: $(objpfx)libm.a \
 157                                   $(+force)
 158         $(do-install)
 159
 160 $(inst_libdir)/libm.a: $(common-objpfx)format.lds \
 161                        $(inst_libdir)/libm-$(version).a \
 162                        $(objpfx)../mathvec/libmvec.a \
 163                        $(+force)
 164         (echo '/* GNU ld script'; echo '*/';\
 165          cat $<; \
 166          echo 'GROUP ( $(libdir)/libm-$(version).a $(libdir)/libmvec.a )' \
 167         ) > $@.new
 168         mv -f $@.new $@
 169 endif
 170
 171 # Rules for the test suite.
 172 tests = test-matherr test-fenv atest-exp atest-sincos atest-exp2 basic-test \
 173         test-misc test-fpucw test-fpucw-ieee tst-definitions test-tgmath \
 174         test-tgmath-ret bug-nextafter bug-nexttoward bug-tgmath1 \
 175         test-tgmath-int test-tgmath2 test-powl tst-CMPLX tst-CMPLX2 test-snan \
 176         test-fenv-tls test-fenv-preserve test-fenv-return test-fenvinline \
 177         test-nearbyint-except test-fenv-clear test-signgam-finite \
 178         test-signgam-finite-c99 test-signgam-finite-c11 \
 179         test-nearbyint-except-2 test-signgam-uchar test-signgam-uchar-init \
 180         test-signgam-uint test-signgam-uint-init test-signgam-ullong \
 181         test-signgam-ullong-init test-nan-overflow test-nan-payload \
 182         test-fexcept test-fexcept-traps test-fesetexcept \
 183         test-fesetexcept-traps test-fetestexceptflag test-femode \
 184         test-femode-traps test-iszero-excess-precision \
 185         test-iseqsig-excess-precision test-flt-eval-method \
 186         test-fp-ilogb-constants test-fp-llogb-constants \
 187         test-fe-snans-always-signal $(tests-static)
 188 tests-static = test-fpucw-static test-fpucw-ieee-static \
 189                test-signgam-uchar-static test-signgam-uchar-init-static \
 190                test-signgam-uint-static test-signgam-uint-init-static \
 191                test-signgam-ullong-static test-signgam-ullong-init-static
 192
 193 ifneq (,$(CXX))
 194 tests += test-math-isinff test-math-iszero
 195 endif
 196
 197 ifneq (no,$(PERL))
 198 libm-vec-tests = $(addprefix test-,$(libmvec-tests))
 199
 200 libm-tests = $(foreach t,$(types),test-$(t) test-$(t)-finite test-i$(t)) \
 201              $(libm-vec-tests)
 202
 203 libm-tests.o = $(addsuffix .o,$(libm-tests))
 204
 205 tests += $(libm-tests)
 206 libm-test-support = $(foreach t,$(types),libm-test-support-$(t))
 207 test-extras += $(libm-test-support)
 208 extra-test-objs += $(addsuffix .o, $(libm-test-support))
 209 libm-vec-test-wrappers = $(addsuffix -wrappers, $(libm-vec-tests))
 210 test-extras += $(libm-vec-test-wrappers)
 211 extra-test-objs += $(addsuffix .o, $(libm-vec-test-wrappers))
 212
 213 ulps-file = $(firstword $(wildcard $(sysdirs:%=%/libm-test-ulps)))
 214
 215 $(objpfx)libm-test-ulps.h: $(ulps-file) gen-libm-test.pl
 216         $(make-target-directory)
 217         $(PERL) gen-libm-test.pl -u $< -H $@
 218
 219 libm-test-funcs-auto = acos acosh asin asinh atan atan2 atanh cabs cacos \
 220                        cacosh carg casin casinh catan catanh cbrt ccos ccosh \
 221                        cexp clog clog10 cos cosh cpow csin csinh csqrt ctan \
 222                        ctanh erf erfc exp exp10 exp2 expm1 fma hypot j0 j1 jn \
 223                        lgamma log log10 log1p log2 pow sin sincos sinh sqrt \
 224                        tan tanh tgamma y0 y1 yn
 225 libm-test-funcs-noauto = canonicalize ceil cimag conj copysign cproj creal \
 226                          fabs fdim floor fmax fmaxmag fmin fminmag fmod \
 227                          fpclassify frexp fromfp fromfpx getpayload ilogb \
 228                          iscanonical iseqsig isfinite isgreater \
 229                          isgreaterequal isinf isless islessequal \
 230                          islessgreater isnan isnormal issignaling issubnormal \
 231                          isunordered iszero llogb llrint llround logb lrint \
 232                          lround modf nearbyint nextafter nextdown nexttoward \
 233                          nextup remainder remquo rint round roundeven scalb \
 234                          scalbln scalbn setpayload setpayloadsig signbit \
 235                          significand totalorder totalordermag trunc ufromfp \
 236                          ufromfpx
 237 libm-test-funcs-all = $(libm-test-funcs-auto) $(libm-test-funcs-noauto)
 238 libm-test-c-auto = $(foreach f,$(libm-test-funcs-auto),libm-test-$(f).c)
 239 libm-test-c-noauto = $(foreach f,$(libm-test-funcs-noauto),libm-test-$(f).c)
 240 libm-tests-generated = libm-test-ulps.h libm-have-vector-test.h libm-test.c \
 241                        $(libm-test-c-auto) $(libm-test-c-noauto)
 242 generated += $(libm-tests-generated)
 243
 244 libm-test-c-auto-obj = $(addprefix $(objpfx),$(libm-test-c-auto))
 245 libm-test-c-noauto-obj = $(addprefix $(objpfx),$(libm-test-c-noauto))
 246
 247 $(objpfx)libm-test.c $(libm-test-c-noauto-obj): $(objpfx)libm-test%.c: \
 248                                                 libm-test%.inc gen-libm-test.pl
 249         $(make-target-directory)
 250         $(PERL) gen-libm-test.pl -c $< -a /dev/null -C $@
 251
 252 $(libm-test-c-auto-obj): $(objpfx)libm-test%.c: libm-test%.inc \
 253                                                 gen-libm-test.pl \
 254                                                 auto-libm-test-out%
 255         $(make-target-directory)
 256         $(PERL) gen-libm-test.pl -c $< -a auto-libm-test-out$* -C $@
 257
 258 libm-test-incs = $(foreach f,$(libm-test-funcs-all),libm-test-$(f).inc)
 259
 260 $(objpfx)libm-have-vector-test.h: $(libm-test-incs) gen-libm-have-vector-test.sh
 261         $(make-target-directory)
 262         $(SHELL) gen-libm-have-vector-test.sh $(sort $(libm-test-incs)) > $@
 263 endif
 264
 265 libm-test-fast-math-cflags = -fno-builtin -D__FAST_MATH__ -DTEST_FAST_MATH
 266 libm-test-vec-cflags = $(libm-test-fast-math-cflags) -fno-inline \
 267                        -ffloat-store -D_OPENMP=201307 -Wno-unknown-pragmas
 268
 269 CFLAGS-test-double-vlen2.c = $(libm-test-vec-cflags)
 270
 271 CFLAGS-test-double-vlen4.c = $(libm-test-vec-cflags)
 272 CFLAGS-test-double-vlen4-wrappers.c = $(double-vlen4-arch-ext-cflags)
 273
 274 CFLAGS-test-double-vlen8.c = $(libm-test-vec-cflags)
 275 CFLAGS-test-double-vlen8-wrappers.c = $(double-vlen8-arch-ext-cflags)
 276
 277 CFLAGS-test-float-vlen4.c = $(libm-test-vec-cflags)
 278
 279 CFLAGS-test-float-vlen8.c = $(libm-test-vec-cflags)
 280 CFLAGS-test-float-vlen8-wrappers.c = $(float-vlen8-arch-ext-cflags)
 281
 282 CFLAGS-test-float-vlen16.c = $(libm-test-vec-cflags)
 283 CFLAGS-test-float-vlen16-wrappers.c = $(float-vlen16-arch-ext-cflags)
 284
 285 # The no-inline tests use -fsignaling-nans, and thereby use the
 286 # versions of classification macros that support sNaNs.  The inline
 287 # function tests use the versions of classification macros that may
 288 # raise spurious exceptions for sNaNs, but also do not test for
 289 # exceptions.  Thus both versions of the classification macros are
 290 # validated.
 291 libm-test-no-inline-cflags = -fno-inline -ffloat-store -fno-builtin \
 292                              -fsignaling-nans
 293 libm-test-finite-cflags = $(libm-test-no-inline-cflags) \
 294                           -U__FINITE_MATH_ONLY__ -D__FINITE_MATH_ONLY__=1
 295 CFLAGS-test-float.c = $(libm-test-no-inline-cflags)
 296 CFLAGS-test-float-finite.c = $(libm-test-finite-cflags)
 297 CFLAGS-libm-test-support-float.c = $(libm-test-no-inline-cflags)
 298 CFLAGS-test-double.c = $(libm-test-no-inline-cflags)
 299 CFLAGS-test-double-finite.c = $(libm-test-finite-cflags)
 300 CFLAGS-libm-test-support-double.c = $(libm-test-no-inline-cflags)
 301 CFLAGS-test-ldouble.c = $(libm-test-no-inline-cflags)
 302 CFLAGS-test-ldouble-finite.c = $(libm-test-finite-cflags)
 303 CFLAGS-libm-test-support-ldouble.c = $(libm-test-no-inline-cflags)
 304 CFLAGS-test-tgmath.c = -fno-builtin
 305 # The following testcase uses very long lines (>3 million), so it may take a
 306 # while to compile it. See: http://llvm.org/bugs/show_bug.cgi?id=14106 and
 307 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54402
 308 CFLAGS-test-tgmath2.c = -fno-builtin
 309 CFLAGS-test-tgmath-ret.c = -fno-builtin
 310 CFLAGS-test-powl.c = -fno-builtin
 311
 312 CFLAGS-test-snan.c = -fsignaling-nans
 313 CFLAGS-test-ifloat.c = $(libm-test-fast-math-cflags)
 314 CFLAGS-test-idouble.c = $(libm-test-fast-math-cflags)
 315 CFLAGS-test-ildouble.c = $(libm-test-fast-math-cflags)
 316
 317 CFLAGS-test-signgam-finite.c = -ffinite-math-only
 318 CFLAGS-test-signgam-finite-c99.c = -ffinite-math-only -std=c99
 319 CFLAGS-test-signgam-finite-c11.c = -ffinite-math-only -std=c11
 320 CFLAGS-test-signgam-uchar.c = -std=c99
 321 CFLAGS-test-signgam-uchar-init.c = -std=c99
 322 CFLAGS-test-signgam-uchar-static.c = -std=c99
 323 CFLAGS-test-signgam-uchar-init-static.c = -std=c99
 324 CFLAGS-test-signgam-uint.c = -std=c99
 325 CFLAGS-test-signgam-uint-init.c = -std=c99
 326 CFLAGS-test-signgam-uint-static.c = -std=c99
 327 CFLAGS-test-signgam-uint-init-static.c = -std=c99
 328 CFLAGS-test-signgam-ullong.c = -std=c99
 329 CFLAGS-test-signgam-ullong-init.c = -std=c99
 330 CFLAGS-test-signgam-ullong-static.c = -std=c99
 331 CFLAGS-test-signgam-ullong-init-static.c = -std=c99
 332
 333 CFLAGS-test-math-isinff.cc = -std=gnu++11
 334 CFLAGS-test-math-iszero.cc = -std=gnu++11
 335
 336 CFLAGS-test-iszero-excess-precision.c = -fexcess-precision=standard
 337 CFLAGS-test-iseqsig-excess-precision.c = -fexcess-precision=standard
 338 CFLAGS-test-flt-eval-method.c = -fexcess-precision=standard
 339
 340 CFLAGS-test-fe-snans-always-signal.c = -fsignaling-nans
 341
 342 # The -lieee module sets the _LIB_VERSION_ switch to IEEE mode
 343 # for error handling in the -lm functions.
 344 install-lib += libieee.a
 345 non-lib.a += libieee.a
 346 extra-objs += libieee.a ieee-math.o
 347
 348 include ../Rules
 349
 350 gen-all-calls = $(gen-libm-calls) $(gen-calls)
 351
 352 generated += $(addsuffix .c,$(call type-foreach,$(gen-all-calls))) \
 353              gen-libm-templates.stmp
 354
 355 # Create wrappers in the math build directory.
 356 $(objpfx)gen-libm-templates.stmp: Makefile
 357         $(make-target-directory)
 358         for gcall in $(gen-all-calls); do                                 \
 359           func=$${gcall%F*}$${gcall#*F};                                  \
 360           for type in $(foreach t,$(types),$(t)__$(type-$(t)-suffix)); do \
 361             suff=$${type#*__};                                            \
 362             type=$${type%__*};                                            \
 363             file=$(objpfx)$${gcall%F*}$${suff}$${gcall#*F}.c;             \
 364             (                                                             \
 365               echo "#include <math-type-macros-$${type}.h>";              \
 366               echo "#include <$${func}_template.c>";                      \
 367             ) > $${file};                                                 \
 368           done;                                                           \
 369         done;                                                             \
 370         echo > $(@)
 371
 372 # Add dependency to ensure the generator runs prior.
 373 $(foreach t, $(call type-foreach, $(gen-all-calls)), \
 374              $(objpfx)$(t).c): $(objpfx)gen-libm-templates.stmp
 375
 376 ifneq (no,$(PERL))
 377 # This must come after the inclusion of sysdeps Makefiles via Rules.
 378 $(addprefix $(objpfx), $(libm-tests.o)): $(addprefix $(objpfx),\
 379                                                      $(libm-tests-generated))
 380
 381 $(addprefix $(objpfx),\
 382             $(filter test-float% test-ifloat%,\
 383                      $(libm-tests))): $(objpfx)libm-test-support-float.o
 384
 385 $(addprefix $(objpfx),\
 386             $(filter test-double% test-idouble%,\
 387                      $(libm-tests))): $(objpfx)libm-test-support-double.o
 388
 389 $(addprefix $(objpfx),\
 390             $(filter test-ldouble% test-ildouble%,\
 391                      $(libm-tests))): $(objpfx)libm-test-support-ldouble.o
 392
 393 # Run the math programs to automatically generate ULPs files.
 394 .PHONY: regen-ulps
 395
 396 run-regen-ulps = $(test-wrapper-env) \
 397             $(run-program-env) \
 398             $($*-ENV) $(rtld-prefix) $${run}
 399
 400 regen-ulps: $(addprefix $(objpfx),$(libm-tests))
 401         rm -f $(objpfx)ULPs; rm -f $(objpfx)NewUlps; \
 402         cp $(ulps-file) $(objpfx)libm-test-ulps; \
 403         for run in $^; do \
 404           echo "Regenerating ULPs for $${run}"; \
 405           $(run-regen-ulps) -u -o $(objpfx); \
 406           cat $(objpfx)ULPs >> $(objpfx)libm-test-ulps; \
 407           rm $(objpfx)ULPs; \
 408         done; \
 409         $(PERL) gen-libm-test.pl -n $(objpfx)NewUlps \
 410                                  -u $(objpfx)libm-test-ulps; \
 411         echo "Automatic regeneration of ULPs complete."; \
 412         echo "Difference between the current baseline and the new baseline is:";\
 413         diff -urN $(ulps-file) $(objpfx)NewUlps; \
 414         echo "Copy $(objpfx)NewUlps to $(ulps-file) (relative to source)."
 415 else
 416 regen-ulps:
 417         @echo "Automatic regeneration of ULPs requires perl."; \
 418         exit 1;
 419 endif
 420
 421 # The generated sysd-rules file defines rules like this for sources
 422 # coming from sysdeps/ directories.  These rules find the generic sources.
 423 define o-iterator-doit
 424 $(objpfx)m_%$o: s_%.c $(before-compile); $$(compile-command.c)
 425 endef
 426 object-suffixes-left := $(all-object-suffixes)
 427 include $(o-iterator)
 428
 429 # Likewise, for those generated files shared with libc.
 430 define o-iterator-doit
 431 $(objpfx)m_%$o: $(objpfx)s_%.c $(before-compile); $$(compile-command.c)
 432 endef
 433 object-suffixes-left := $(all-object-suffixes)
 434 include $(o-iterator)
 435
 436 # This file defines the default _LIB_VERSION variable that controls
 437 # the error return conventions for the math functions.
 438 CPPFLAGS-s_lib_version.c := -D_POSIX_MODE
 439
 440 # We don't want the fdlibm code to use the inline math functions,
 441 # only the fdlibm code.
 442 math-CPPFLAGS += -D__NO_MATH_INLINES -D__LIBC_INTERNAL_MATH_INLINES
 443
 444 ifneq ($(long-double-fcts),yes)
 445 # The `double' and `long double' types are the same on this machine.
 446 # We won't compile the `long double' code at all.  Tell the `double' code
 447 # to define aliases for the `FUNCl' names.  To avoid type conflicts in
 448 # defining those aliases, tell <math.h> to declare the `FUNCl' names with
 449 # `double' instead of `long double'.
 450 math-CPPFLAGS += -DNO_LONG_DOUBLE -D_Mlong_double_=double
 451 endif
 452
 453 # These files quiet sNaNs in a way that is optimized away without
 454 # -fsignaling-nans.
 455 CFLAGS-s_modf.c += -fsignaling-nans
 456 CFLAGS-s_modff.c += -fsignaling-nans
 457 CFLAGS-s_modfl.c += -fsignaling-nans
 458
 459 # The -lieee library is actually an object file.
 460 # The module just defines the _LIB_VERSION_ variable.
 461 # It's not a library to make sure it is linked in instead of s_lib_version.o.
 462 $(objpfx)libieee.a: $(objpfx)ieee-math.o
 463         rm -f $@
 464         $(patsubst %/,cd % &&,$(objpfx)) \
 465         $(LN_S) $(<F) $(@F)
 466
 467 $(addprefix $(objpfx),\
 468             $(filter-out $(tests-static) $(libm-vec-tests),$(tests))): $(libm)
 469 $(addprefix $(objpfx),$(tests-static)): $(objpfx)libm.a
 470 $(addprefix $(objpfx), $(libm-vec-tests)): $(objpfx)%: $(objpfx)%-wrappers.o \
 471                                                        $(libm) $(libmvec)
 472
 473 gmp-objs = $(patsubst %,$(common-objpfx)stdlib/%.o,\
 474                       add_n sub_n cmp addmul_1 mul_1 mul_n divmod_1 \
 475                       lshift rshift mp_clz_tab udiv_qrnnd inlines \
 476                       $(gmp-sysdep_routines))
 477 $(objpfx)atest-exp: $(gmp-objs)
 478 $(objpfx)atest-sincos: $(gmp-objs)
 479 $(objpfx)atest-exp2: $(gmp-objs)
 480 $(objpfx)test-fenv-tls: $(shared-thread-library)