llvm dev - Feb 2018 - Cross-compiling libc++ to linux-armv7hf gives undefined symbols in cmath / math.h

Hello,

I am trying to cross-compile libc++ from my x86_64 linux system to armv7hf.
We have our own gcc compiler that we build with crosstools-ng (based on gcc
6.3.0) and I set my environment like this:

CC=armv7a-plex-linux-gnueabihf-gcc
CXX=armv7a-plex-linux-gnueabihf-g++
CFLAGS=-fPIC -DPIC -mfloat-abi=hard -march=armv7-a -Os -mfpu=vfpv3-d16
--sysroot=<path>
CXXFLAGS=-fPIC -DPIC -mfloat-abi=hard -march=armv7-a -Os -mfpu=vfpv3-d16
--sysroot=<path>
LDFLAGS=-static-libgcc --sysroot=<path>

then run cmake:

cmake -GNinja -DLIBCXXABI_USE_LLVM_UNWINDER=ON DLLVM_TARGET_ARCH=ARM
-DLLVM_DEFAULT_TARGET_TRIPLE=arm-linux-gnueabihf
-DLLVM_TARGETS_TO_BUILD=ARM -DCMAKE_CROSSCOMPILING=True ..

This errors out as shown below. It's like it's missing some definitions
of
different math functions that I can't seem to be able to see anywhere else.
Is this a known problem? Or is it something with my compiler / toolchain
setup that creates this problem?

Thanks for any assistance.

-- Tobias

armv7a-plex-linux-gnueabihf-g++  -DLLVM_BUILD_GLOBAL_ISEL -DNDEBUG -D_DEBUG
-D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D_LARGEFILE_SOURCE
-D_LIBCPP_BUILDING_LIBRARY -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-Iprojects/libcxx/lib -I../projects/libcxx/lib -Iinclude -I../include
-Iprojects/libcxx/include/c++build -I../projects/libcxx/include -fPIC -DPIC
-mfloat-abi=hard -march=armv7-a -Os -mfpu=vfpv3-d16
--sysroot=armv7a-plex-linux-gnueabihf/sysroot -fPIC
-fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -W
-Wno-unused-parameter -Wwrite-strings -Wcast-qual
-Wno-missing-field-initializers  -Wno-long-long -Wno-maybe-uninitialized
-Wdelete-non-virtual-dtor -Wno-comment -g   -DLIBCXX_BUILDING_LIBCXXABI
-std=c++11 -nostdinc++ -fvisibility-inlines-hidden -Wall -Wextra -W
-Wwrite-strings -Wno-unused-parameter -Wno-long-long -Werror=return-type
-Wno-literal-suffix -Wno-c++14-compat -Wno-noexcept-type -Wno-error -fPIC
-MD -MT
projects/libcxx/lib/CMakeFiles/cxx_objects.dir/__/src/algorithm.cpp.o -MF
projects/libcxx/lib/CMakeFiles/cxx_objects.dir/__/src/algorithm.cpp.o.d -o
projects/libcxx/lib/CMakeFiles/cxx_objects.dir/__/src/algorithm.cpp.o -c
../projects/libcxx/src/algorithm.cpp
In file included from ../projects/libcxx/include/cmath:305:0,
                 from ../projects/libcxx/include/random:1638,
                 from ../projects/libcxx/src/algorithm.cpp:11:
../projects/libcxx/include/math.h: In function 'long double abs(long
double)':
../projects/libcxx/include/math.h:742:45: error: '::fabsl' has not been
declared
 abs(long double __lcpp_x) _NOEXCEPT {return ::fabsl(__lcpp_x);}
                                             ^~
../projects/libcxx/include/math.h: In function 'long double acos(long
double)':
../projects/libcxx/include/math.h:749:91: error: '::acosl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double acos(long double __lcpp_x)
_NOEXCEPT {return ::acosl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double asin(long
double)':
../projects/libcxx/include/math.h:761:91: error: '::asinl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double asin(long double __lcpp_x)
_NOEXCEPT {return ::asinl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double atan(long
double)':
../projects/libcxx/include/math.h:773:91: error: '::atanl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double atan(long double __lcpp_x)
_NOEXCEPT {return ::atanl(__lcpp_x);}

^~
In file included from ../projects/libcxx/include/cmath:305:0,
                 from ../projects/libcxx/include/random:1638,
                 from ../projects/libcxx/src/algorithm.cpp:11:
../projects/libcxx/include/math.h: In function 'long double atan2(long
double, long double)':
../projects/libcxx/include/math.h:785:114: error: '::atan2l' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double atan2(long double __lcpp_y,
long double __lcpp_x) _NOEXCEPT {return ::atan2l(__lcpp_y, __lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double ceil(long
double)':
../projects/libcxx/include/math.h:808:91: error: '::ceill' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double ceil(long double __lcpp_x)
_NOEXCEPT {return ::ceill(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double cos(long
double)':
../projects/libcxx/include/math.h:820:90: error: '::cosl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double cos(long double __lcpp_x)
_NOEXCEPT {return ::cosl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double cosh(long
double)':
../projects/libcxx/include/math.h:832:91: error: '::coshl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double cosh(long double __lcpp_x)
_NOEXCEPT {return ::coshl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double exp(long
double)':
../projects/libcxx/include/math.h:844:90: error: '::expl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double exp(long double __lcpp_x)
_NOEXCEPT {return ::expl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double fabs(long
double)':
../projects/libcxx/include/math.h:856:91: error: '::fabsl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double fabs(long double __lcpp_x)
_NOEXCEPT {return ::fabsl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double floor(long
double)':
../projects/libcxx/include/math.h:868:92: error: '::floorl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double floor(long double __lcpp_x)
_NOEXCEPT {return ::floorl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double fmod(long
double, long double)':
../projects/libcxx/include/math.h:880:113: error: '::fmodl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double fmod(long double __lcpp_x,
long double __lcpp_y) _NOEXCEPT {return ::fmodl(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double frexp(long
double, int*)':
../projects/libcxx/include/math.h:903:107: error: '::frexpl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double frexp(long double __lcpp_x,
int* __lcpp_e) _NOEXCEPT {return ::frexpl(__lcpp_x, __lcpp_e);}

^~
../projects/libcxx/include/math.h: In function 'long double ldexp(long
double, int)':
../projects/libcxx/include/math.h:915:106: error: '::ldexpl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double ldexp(long double __lcpp_x,
int __lcpp_e) _NOEXCEPT {return ::ldexpl(__lcpp_x, __lcpp_e);}

^~
../projects/libcxx/include/math.h: In function 'long double log(long
double)':
../projects/libcxx/include/math.h:927:90: error: '::logl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double log(long double __lcpp_x)
_NOEXCEPT {return ::logl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double log10(long
double)':
../projects/libcxx/include/math.h:939:92: error: '::log10l' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double log10(long double __lcpp_x)
_NOEXCEPT {return ::log10l(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double modf(long
double, long double*)':
../projects/libcxx/include/math.h:951:114: error: '::modfl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double modf(long double __lcpp_x,
long double* __lcpp_y) _NOEXCEPT {return ::modfl(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double pow(long
double, long double)':
../projects/libcxx/include/math.h:958:112: error: '::powl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double pow(long double __lcpp_x,
long double __lcpp_y) _NOEXCEPT {return ::powl(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double sin(long
double)':
../projects/libcxx/include/math.h:981:90: error: '::sinl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double sin(long double __lcpp_x)
_NOEXCEPT {return ::sinl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double sinh(long
double)':
../projects/libcxx/include/math.h:993:91: error: '::sinhl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double sinh(long double __lcpp_x)
_NOEXCEPT {return ::sinhl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double sqrt(long
double)':
../projects/libcxx/include/math.h:1005:91: error: '::sqrtl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double sqrt(long double __lcpp_x)
_NOEXCEPT {return ::sqrtl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double tan(long
double)':
../projects/libcxx/include/math.h:1017:90: error: '::tanl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double tan(long double __lcpp_x)
_NOEXCEPT {return ::tanl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double tanh(long
double)':
../projects/libcxx/include/math.h:1029:91: error: '::tanhl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double tanh(long double __lcpp_x)
_NOEXCEPT {return ::tanhl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double acosh(long
double)':
../projects/libcxx/include/math.h:1040:92: error: '::acoshl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double acosh(long double __lcpp_x)
_NOEXCEPT {return ::acoshl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double asinh(long
double)':
../projects/libcxx/include/math.h:1050:92: error: '::asinhl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double asinh(long double __lcpp_x)
_NOEXCEPT {return ::asinhl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double atanh(long
double)':
../projects/libcxx/include/math.h:1060:92: error: '::atanhl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double atanh(long double __lcpp_x)
_NOEXCEPT {return ::atanhl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double cbrt(long
double)':
../projects/libcxx/include/math.h:1070:91: error: '::cbrtl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double cbrt(long double __lcpp_x)
_NOEXCEPT {return ::cbrtl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double copysign(long
double, long double)':
../projects/libcxx/include/math.h:1085:10: error: '::copysignl' has not
been declared
   return ::copysignl(__lcpp_x, __lcpp_y);
          ^~
../projects/libcxx/include/math.h: In function 'long double erf(long
double)':
../projects/libcxx/include/math.h:1107:90: error: '::erfl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double erf(long double __lcpp_x)
_NOEXCEPT {return ::erfl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double erfc(long
double)':
../projects/libcxx/include/math.h:1117:91: error: '::erfcl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double erfc(long double __lcpp_x)
_NOEXCEPT {return ::erfcl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double exp2(long
double)':
../projects/libcxx/include/math.h:1127:91: error: '::exp2l' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double exp2(long double __lcpp_x)
_NOEXCEPT {return ::exp2l(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double expm1(long
double)':
../projects/libcxx/include/math.h:1137:92: error: '::expm1l' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double expm1(long double __lcpp_x)
_NOEXCEPT {return ::expm1l(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double fdim(long
double, long double)':
../projects/libcxx/include/math.h:1147:113: error: '::fdiml' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double fdim(long double __lcpp_x,
long double __lcpp_y) _NOEXCEPT {return ::fdiml(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double fma(long
double, long double, long double)':
../projects/libcxx/include/math.h:1168:134: error: '::fmal' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double fma(long double __lcpp_x,
long double __lcpp_y, long double __lcpp_z) _NOEXCEPT {return
::fmal(__lcpp_x, __lcpp_y, __lcpp_z);}

^~
../projects/libcxx/include/math.h: In function 'long double fmax(long
double, long double)':
../projects/libcxx/include/math.h:1191:113: error: '::fmaxl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double fmax(long double __lcpp_x,
long double __lcpp_y) _NOEXCEPT {return ::fmaxl(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double fmin(long
double, long double)':
../projects/libcxx/include/math.h:1212:113: error: '::fminl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double fmin(long double __lcpp_x,
long double __lcpp_y) _NOEXCEPT {return ::fminl(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double hypot(long
double, long double)':
../projects/libcxx/include/math.h:1233:114: error: '::hypotl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double hypot(long double __lcpp_x,
long double __lcpp_y) _NOEXCEPT {return ::hypotl(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'int ilogb(long double)':
../projects/libcxx/include/math.h:1254:84: error: '::ilogbl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY int ilogb(long double __lcpp_x) _NOEXCEPT
{return ::ilogbl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double lgamma(long
double)':
../projects/libcxx/include/math.h:1264:93: error: '::lgammal' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double lgamma(long double __lcpp_x)
_NOEXCEPT {return ::lgammal(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long long int llrint(long
double)':
../projects/libcxx/include/math.h:1274:91: error: '::llrintl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long long llrint(long double __lcpp_x)
_NOEXCEPT {return ::llrintl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long long int llround(long
double)':
../projects/libcxx/include/math.h:1284:92: error: '::llroundl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long long llround(long double __lcpp_x)
_NOEXCEPT {return ::llroundl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double log1p(long
double)':
../projects/libcxx/include/math.h:1294:92: error: '::log1pl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double log1p(long double __lcpp_x)
_NOEXCEPT {return ::log1pl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double log2(long
double)':
../projects/libcxx/include/math.h:1304:91: error: '::log2l' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double log2(long double __lcpp_x)
_NOEXCEPT {return ::log2l(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double logb(long
double)':
../projects/libcxx/include/math.h:1314:91: error: '::logbl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double logb(long double __lcpp_x)
_NOEXCEPT {return ::logbl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long int lrint(long
double)':
../projects/libcxx/include/math.h:1324:85: error: '::lrintl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long lrint(long double __lcpp_x)
_NOEXCEPT {return ::lrintl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long int lround(long
double)':
../projects/libcxx/include/math.h:1334:86: error: '::lroundl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long lround(long double __lcpp_x)
_NOEXCEPT {return ::lroundl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double nearbyint(long
double)':
../projects/libcxx/include/math.h:1346:96: error: '::nearbyintl' has not
been declared
 inline _LIBCPP_INLINE_VISIBILITY long double nearbyint(long double
__lcpp_x) _NOEXCEPT {return ::nearbyintl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double nextafter(long
double, long double)':
../projects/libcxx/include/math.h:1356:118: error: '::nextafterl' has
not
been declared
 inline _LIBCPP_INLINE_VISIBILITY long double nextafter(long double
__lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::nextafterl(__lcpp_x,
__lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double nexttoward(long
double, long double)':
../projects/libcxx/include/math.h:1377:119: error: '::nexttowardl' has
not
been declared
 inline _LIBCPP_INLINE_VISIBILITY long double nexttoward(long double
__lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::nexttowardl(__lcpp_x,
__lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double remainder(long
double, long double)':
../projects/libcxx/include/math.h:1387:118: error: '::remainderl' has
not
been declared
 inline _LIBCPP_INLINE_VISIBILITY long double remainder(long double
__lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::remainderl(__lcpp_x,
__lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double remquo(long
double, long double, int*)':
../projects/libcxx/include/math.h:1408:130: error: '::remquol' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double remquo(long double __lcpp_x,
long double __lcpp_y, int* __lcpp_z) _NOEXCEPT {return ::remquol(__lcpp_x,
__lcpp_y, __lcpp_z);}

^~
../projects/libcxx/include/math.h: In function 'long double rint(long
double)':
../projects/libcxx/include/math.h:1429:91: error: '::rintl' has not been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double rint(long double __lcpp_x)
_NOEXCEPT {return ::rintl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double round(long
double)':
../projects/libcxx/include/math.h:1439:92: error: '::roundl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double round(long double __lcpp_x)
_NOEXCEPT {return ::roundl(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double scalbln(long
double, long int)':
../projects/libcxx/include/math.h:1449:109: error: '::scalblnl' has not
been declared
 inline _LIBCPP_INLINE_VISIBILITY long double scalbln(long double __lcpp_x,
long __lcpp_y) _NOEXCEPT {return ::scalblnl(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double scalbn(long
double, int)':
../projects/libcxx/include/math.h:1459:107: error: '::scalbnl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double scalbn(long double __lcpp_x,
int __lcpp_y) _NOEXCEPT {return ::scalbnl(__lcpp_x, __lcpp_y);}

^~
../projects/libcxx/include/math.h: In function 'long double tgamma(long
double)':
../projects/libcxx/include/math.h:1469:93: error: '::tgammal' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double tgamma(long double __lcpp_x)
_NOEXCEPT {return ::tgammal(__lcpp_x);}

^~
../projects/libcxx/include/math.h: In function 'long double trunc(long
double)':
../projects/libcxx/include/math.h:1479:92: error: '::truncl' has not
been
declared
 inline _LIBCPP_INLINE_VISIBILITY long double trunc(long double __lcpp_x)
_NOEXCEPT {return ::truncl(__lcpp_x);}

^~
In file included from ../projects/libcxx/include/random:1638:0,
                 from ../projects/libcxx/src/algorithm.cpp:11:
../projects/libcxx/include/cmath: At global scope:
../projects/libcxx/include/cmath:464:9: error: '::acosl' has not been
declared
 using ::acosl;
         ^~~~~
../projects/libcxx/include/cmath:465:9: error: '::asinl' has not been
declared
 using ::asinl;
         ^~~~~
../projects/libcxx/include/cmath:466:9: error: '::atanl' has not been
declared
 using ::atanl;
         ^~~~~
../projects/libcxx/include/cmath:467:9: error: '::atan2l' has not been
declared
 using ::atan2l;
         ^~~~~~
../projects/libcxx/include/cmath:468:9: error: '::ceill' has not been
declared
 using ::ceill;
         ^~~~~
../projects/libcxx/include/cmath:469:9: error: '::cosl' has not been
declared
 using ::cosl;
         ^~~~
../projects/libcxx/include/cmath:470:9: error: '::coshl' has not been
declared
 using ::coshl;
         ^~~~~
../projects/libcxx/include/cmath:471:9: error: '::expl' has not been
declared
 using ::expl;
         ^~~~
../projects/libcxx/include/cmath:472:9: error: '::fabsl' has not been
declared
 using ::fabsl;
         ^~~~~
../projects/libcxx/include/cmath:473:9: error: '::floorl' has not been
declared
 using ::floorl;
         ^~~~~~
../projects/libcxx/include/cmath:474:9: error: '::fmodl' has not been
declared
 using ::fmodl;
         ^~~~~
../projects/libcxx/include/cmath:475:9: error: '::frexpl' has not been
declared
 using ::frexpl;
         ^~~~~~
../projects/libcxx/include/cmath:476:9: error: '::ldexpl' has not been
declared
 using ::ldexpl;
         ^~~~~~
../projects/libcxx/include/cmath:477:9: error: '::logl' has not been
declared
 using ::logl;
         ^~~~
../projects/libcxx/include/cmath:478:9: error: '::log10l' has not been
declared
 using ::log10l;
         ^~~~~~
../projects/libcxx/include/cmath:479:9: error: '::modfl' has not been
declared
 using ::modfl;
         ^~~~~
../projects/libcxx/include/cmath:480:9: error: '::powl' has not been
declared
 using ::powl;
         ^~~~
../projects/libcxx/include/cmath:481:9: error: '::sinl' has not been
declared
 using ::sinl;
         ^~~~
../projects/libcxx/include/cmath:482:9: error: '::sinhl' has not been
declared
 using ::sinhl;
         ^~~~~
../projects/libcxx/include/cmath:483:9: error: '::sqrtl' has not been
declared
 using ::sqrtl;
         ^~~~~
../projects/libcxx/include/cmath:484:9: error: '::tanl' has not been
declared
 using ::tanl;
         ^~~~
../projects/libcxx/include/cmath:486:9: error: '::tanhl' has not been
declared
 using ::tanhl;
         ^~~~~
../projects/libcxx/include/cmath:487:9: error: '::acoshl' has not been
declared
 using ::acoshl;
         ^~~~~~
../projects/libcxx/include/cmath:488:9: error: '::asinhl' has not been
declared
 using ::asinhl;
         ^~~~~~
../projects/libcxx/include/cmath:489:9: error: '::atanhl' has not been
declared
 using ::atanhl;
         ^~~~~~
../projects/libcxx/include/cmath:490:9: error: '::cbrtl' has not been
declared
 using ::cbrtl;
         ^~~~~
../projects/libcxx/include/cmath:492:9: error: '::copysignl' has not
been
declared
 using ::copysignl;
         ^~~~~~~~~
../projects/libcxx/include/cmath:494:9: error: '::erfl' has not been
declared
 using ::erfl;
         ^~~~
../projects/libcxx/include/cmath:495:9: error: '::erfcl' has not been
declared
 using ::erfcl;
         ^~~~~
../projects/libcxx/include/cmath:496:9: error: '::exp2l' has not been
declared
 using ::exp2l;
         ^~~~~
../projects/libcxx/include/cmath:497:9: error: '::expm1l' has not been
declared
 using ::expm1l;
         ^~~~~~
../projects/libcxx/include/cmath:498:9: error: '::fdiml' has not been
declared
 using ::fdiml;
         ^~~~~
../projects/libcxx/include/cmath:499:9: error: '::fmal' has not been
declared
 using ::fmal;
         ^~~~
../projects/libcxx/include/cmath:500:9: error: '::fmaxl' has not been
declared
 using ::fmaxl;
         ^~~~~
../projects/libcxx/include/cmath:501:9: error: '::fminl' has not been
declared
 using ::fminl;
         ^~~~~
../projects/libcxx/include/cmath:502:9: error: '::hypotl' has not been
declared
 using ::hypotl;
         ^~~~~~
../projects/libcxx/include/cmath:503:9: error: '::ilogbl' has not been
declared
 using ::ilogbl;
         ^~~~~~
../projects/libcxx/include/cmath:504:9: error: '::lgammal' has not been
declared
 using ::lgammal;
         ^~~~~~~
../projects/libcxx/include/cmath:505:9: error: '::llrintl' has not been
declared
 using ::llrintl;
         ^~~~~~~
../projects/libcxx/include/cmath:506:9: error: '::llroundl' has not been
declared
 using ::llroundl;
         ^~~~~~~~
../projects/libcxx/include/cmath:507:9: error: '::log1pl' has not been
declared
 using ::log1pl;
         ^~~~~~
../projects/libcxx/include/cmath:508:9: error: '::log2l' has not been
declared
 using ::log2l;
         ^~~~~
../projects/libcxx/include/cmath:509:9: error: '::logbl' has not been
declared
 using ::logbl;
         ^~~~~
../projects/libcxx/include/cmath:510:9: error: '::lrintl' has not been
declared
 using ::lrintl;
         ^~~~~~
../projects/libcxx/include/cmath:511:9: error: '::lroundl' has not been
declared
 using ::lroundl;
         ^~~~~~~
../projects/libcxx/include/cmath:512:9: error: '::nanl' has not been
declared
 using ::nanl;
         ^~~~
../projects/libcxx/include/cmath:513:9: error: '::nearbyintl' has not
been
declared
 using ::nearbyintl;
         ^~~~~~~~~~
../projects/libcxx/include/cmath:514:9: error: '::nextafterl' has not
been
declared
 using ::nextafterl;
         ^~~~~~~~~~
../projects/libcxx/include/cmath:515:9: error: '::nexttowardl' has not
been
declared
 using ::nexttowardl;
         ^~~~~~~~~~~
../projects/libcxx/include/cmath:516:9: error: '::remainderl' has not
been
declared
 using ::remainderl;
         ^~~~~~~~~~
../projects/libcxx/include/cmath:517:9: error: '::remquol' has not been
declared
 using ::remquol;
         ^~~~~~~
../projects/libcxx/include/cmath:518:9: error: '::rintl' has not been
declared
 using ::rintl;
         ^~~~~
../projects/libcxx/include/cmath:519:9: error: '::roundl' has not been
declared
 using ::roundl;
         ^~~~~~
../projects/libcxx/include/cmath:520:9: error: '::scalblnl' has not been
declared
 using ::scalblnl;
         ^~~~~~~~
../projects/libcxx/include/cmath:521:9: error: '::scalbnl' has not been
declared
 using ::scalbnl;
         ^~~~~~~
../projects/libcxx/include/cmath:522:9: error: '::tgammal' has not been
declared
 using ::tgammal;
         ^~~~~~~
../projects/libcxx/include/cmath:523:9: error: '::truncl' has not been
declared
 using ::truncl;
         ^~~~~~
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