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# Copyright (C) 1996-2014 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <>.
# Makefile for the math library.
subdir := math
# Installed header files.
headers := math.h bits/mathcalls.h bits/mathinline.h bits/huge_val.h \
bits/huge_valf.h bits/huge_vall.h bits/inf.h bits/nan.h \
fpu_control.h complex.h bits/cmathcalls.h fenv.h \
bits/fenv.h bits/fenvinline.h bits/mathdef.h tgmath.h \
# FPU support code.
aux := setfpucw fpu_control
# Build the -lm library.
extra-libs := libm
extra-libs-others = $(extra-libs)
libm-support = k_standard s_lib_version s_matherr s_signgam \
fclrexcpt fgetexcptflg fraiseexcpt fsetexcptflg \
ftestexcept fegetround fesetround fegetenv feholdexcpt \
fesetenv feupdateenv t_exp fedisblxcpt feenablxcpt \
libm-calls = e_acos e_acosh e_asin e_atan2 e_atanh e_cosh e_exp e_fmod \
e_hypot e_j0 e_j1 e_jn e_lgamma_r e_log e_log10 e_pow \
e_rem_pio2 e_remainder e_scalb e_sinh e_sqrt e_gamma_r \
e_ilogb \
k_cos k_rem_pio2 k_sin k_tan s_asinh s_atan s_cbrt \
s_ceil s_cos s_erf s_expm1 s_fabs \
s_floor s_log1p s_logb \
s_nextafter s_nexttoward s_rint s_scalbln \
s_significand s_sin s_tan s_tanh w_acos w_acosh w_asin \
w_atan2 w_atanh w_cosh w_drem w_exp w_exp2 w_exp10 w_fmod \
w_tgamma w_hypot w_j0 w_j1 w_jn w_lgamma w_lgamma_r \
w_log w_log10 w_pow w_remainder w_scalb w_sinh w_sqrt \
w_ilogb \
s_fpclassify s_fmax s_fmin s_fdim s_nan s_trunc \
s_remquo e_log2 e_exp2 s_round s_nearbyint s_sincos \
conj cimag creal cabs carg s_cexp s_csinh s_ccosh s_clog \
s_catan s_casin s_ccos s_csin s_ctan s_ctanh s_cacos \
s_casinh s_cacosh s_catanh s_csqrt s_cpow s_cproj s_clog10 \
s_fma s_lrint s_llrint s_lround s_llround e_exp10 w_log2 \
s_isinf_ns s_issignaling $(calls:s_%=m_%) x2y2m1 k_casinh \
include ../Makeconfig
dbl-only-routines := branred doasin dosincos halfulp mpa mpatan2 \
mpatan mpexp mplog mpsqrt mptan sincos32 slowexp \
slowpow sincostab
libm-routines = $(strip $(libm-support) $(libm-calls) \
$(patsubst %_rf,%f_r,$(libm-calls:=f)) \
$(long-m-$(long-double-fcts))) \
long-m-routines = $(patsubst %_rl,%l_r,$(libm-calls:=l))
long-m-support = t_sincosl k_sincosl
long-m-yes = $(long-m-routines) $(long-m-support)
# These functions are in libc instead of libm because __printf_fp
# calls them, so any program using printf will need them linked in,
# and we don't want to have to link every program with -lm.
# In libm-calls (above), list m_foo in place of s_foo for any
# routine that should be compiled separately for its libc and libm versions.
calls = s_isinf s_isnan s_finite s_copysign s_modf s_scalbn s_frexp s_ldexp \
generated += $(foreach s,.c .S l.c l.S f.c f.S,$(calls:s_%=m_%$s))
routines = $(calls) $(calls:=f) $(long-c-$(long-double-fcts))
long-c-yes = $(calls:=l)
# Rules for the test suite.
tests = test-matherr test-fenv atest-exp atest-sincos atest-exp2 basic-test \
test-misc test-fpucw test-fpucw-ieee tst-definitions test-tgmath \
test-tgmath-ret bug-nextafter bug-nexttoward bug-tgmath1 \
test-tgmath-int test-tgmath2 test-powl tst-CMPLX tst-CMPLX2 test-snan \
test-nan-overflow test-nan-payload \
test-fenv-tls $(tests-static)
tests-static = test-fpucw-static test-fpucw-ieee-static
# We do the `long double' tests only if this data type is available and
# distinct from `double'.
test-longdouble-yes = test-ldouble test-ildoubl
ifneq (no,$(PERL))
libm-tests = test-float test-double $(test-longdouble-$(long-double-fcts)) \
test-ifloat test-idouble
libm-tests.o = $(addsuffix .o,$(libm-tests))
tests += $(libm-tests)
libm-tests-generated = libm-test-ulps.h libm-test.c
generated += $(libm-tests-generated) libm-test.stmp
# This is needed for dependencies
before-compile += $(objpfx)libm-test.c
ulps-file = $(firstword $(wildcard $(sysdirs:%=%/libm-test-ulps)))
$(addprefix $(objpfx), $(libm-tests-generated)): $(objpfx)libm-test.stmp
$(objpfx)libm-test.stmp: $(ulps-file) \
$(PERL) -u $< -o "$(objpfx)"
@echo > $@
$(objpfx)test-float.o: $(objpfx)libm-test.stmp
$(objpfx)test-ifloat.o: $(objpfx)libm-test.stmp
$(objpfx)test-double.o: $(objpfx)libm-test.stmp
$(objpfx)test-idouble.o: $(objpfx)libm-test.stmp
$(objpfx)test-ldouble.o: $(objpfx)libm-test.stmp
$(objpfx)test-ildoubl.o: $(objpfx)libm-test.stmp
CFLAGS-test-float.c = -fno-inline -ffloat-store -fno-builtin -frounding-math
CFLAGS-test-double.c = -fno-inline -ffloat-store -fno-builtin -frounding-math
CFLAGS-test-ldouble.c = -fno-inline -ffloat-store -fno-builtin -frounding-math
CFLAGS-test-tgmath.c = -fno-builtin
# The following testcase uses very long lines (>3 million), so it may take a
# while to compile it. See: and
CFLAGS-test-tgmath2.c = -fno-builtin
CFLAGS-test-tgmath-ret.c = -fno-builtin
CFLAGS-test-powl.c = -fno-builtin
CFLAGS-test-test-fenv.c = -frounding-math
CFLAGS-test-misc.c = -frounding-math
-DTEST_FAST_MATH -fno-builtin -frounding-math
-DTEST_FAST_MATH -fno-builtin -frounding-math
-DTEST_FAST_MATH -fno-builtin -frounding-math
# The -lieee module sets the _LIB_VERSION_ switch to IEEE mode
# for error handling in the -lm functions.
install-lib += libieee.a
non-lib.a += libieee.a
extra-objs += libieee.a ieee-math.o
include ../Rules
ifneq (no,$(PERL))
# Run the math programs to automatically generate ULPs files.
.PHONY: regen-ulps
run-regen-ulps = $(test-wrapper-env) \
GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
$($*-ENV) $(rtld-prefix) $${run}
regen-ulps: $(addprefix $(objpfx),$(libm-tests))
rm -f $(objpfx)ULPs; rm -f $(objpfx)NewUlps; \
cp $(ulps-file) $(objpfx)libm-test-ulps; \
for run in $^; do \
echo "Regenerating ULPs for $${run}"; \
$(run-regen-ulps) -u -o $(objpfx); \
cat $(objpfx)ULPs >> $(objpfx)libm-test-ulps; \
rm $(objpfx)ULPs; \
done; \
$(PERL) -o $(objpfx) -n -u $(objpfx)libm-test-ulps; \
echo "Automatic regeneration of ULPs complete."; \
echo "Difference between the current baseline and the new baseline is:";\
diff -urN $(ulps-file) $(objpfx)NewUlps; \
echo "Copy $(objpfx)NewUlps to $(ulps-file) (relative to source)."
@echo "Automatic regeneration of ULPs requires perl."; \
exit 1;
# The generated sysd-rules file defines rules like this for sources
# coming from sysdeps/ directories. These rules find the generic sources.
define o-iterator-doit
$(objpfx)m_%$o: s_%.c $(before-compile); $$(compile-command.c)
object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
# This file defines the default _LIB_VERSION variable that controls
# the error return conventions for the math functions.
CPPFLAGS-s_lib_version.c := -D_POSIX_MODE
# We don't want the fdlibm code to use the inline math functions,
# only the fdlibm code.
ifneq ($(long-double-fcts),yes)
# The `double' and `long double' types are the same on this machine.
# We won't compile the `long double' code at all. Tell the `double' code
# to define aliases for the `FUNCl' names. To avoid type conflicts in
# defining those aliases, tell <math.h> to declare the `FUNCl' names with
# `double' instead of `long double'.
math-CPPFLAGS += -DNO_LONG_DOUBLE -D_Mlong_double_=double
# The fdlibm code generates a lot of these warnings but is otherwise clean.
override CFLAGS += -Wno-uninitialized
# The -lieee library is actually an object file.
# The module just defines the _LIB_VERSION_ variable.
# It's not a library to make sure it is linked in instead of s_lib_version.o.
$(objpfx)libieee.a: $(objpfx)ieee-math.o
rm -f $@
$(patsubst %/,cd % &&,$(objpfx)) \
$(LN_S) $(<F) $(@F)
ifeq ($(build-shared),yes)
$(addprefix $(objpfx),$(filter-out $(tests-static),$(tests))): $(objpfx)$(
$(addprefix $(objpfx),$(tests-static)): $(objpfx)libm.a
$(addprefix $(objpfx),$(tests)): $(objpfx)libm.a
gmp-objs = $(patsubst %,$(common-objpfx)stdlib/%.o,\
add_n sub_n cmp addmul_1 mul_1 mul_n divmod_1 \
lshift rshift mp_clz_tab udiv_qrnnd inlines \
$(objpfx)atest-exp: $(gmp-objs)
$(objpfx)atest-sincos: $(gmp-objs)
$(objpfx)atest-exp2: $(gmp-objs)
$(objpfx)test-fenv-tls: $(common-objpfx)nptl/