c++ - building the ta-lib library fails with undefined references from libm.so -


trying make ta-lib library (ta-lib-0.4.0-src.tar.gz) following error:

/home/me/ta-lib/src/.libs/libta_lib.so: undefined reference `sinh' /home/me/ta-lib/src/.libs/libta_lib.so: undefined reference `sincos' /home/me/ta-lib/src/.libs/libta_lib.so: undefined reference `ceil' ...

for large number of maths functions.

the failing command looks this:

gcc -g -o2 -o .libs/ta_regtest (... .o files) -l/home/me/ta-lib/src \     /home/me/ta-lib/src/.libs/libta_lib.so -lm -lpthread -ldl

the offending library (ta_lib) looks this:

objdump -tc libta_lib.so | grep "    d  \*und\*" 0000000000000000      d  *und*  0000000000000000              sinh 0000000000000000      d  *und*  0000000000000000              sincos 0000000000000000      d  *und*  0000000000000000              ceil ...

for same maths functions (the grep excludes defined functions , have "w" (presumably weak) flag)

a map lists libraries included, among them:

load /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/libm.so

and list of symbols (objdump -tc) defined in libm.so includes:

000000000001a320  w  id  .text  0000000000000020  glibc_2.2.5 ceil

which 1 of undefined references (they there). cannot determine meaning of glibc_2.2.5.

why loader not finding these functions?

my system looks this:

$ uname -a linux mynode 3.5.0-17-generic #28-ubuntu smp tue oct 9 19:31:23 utc 2012 x86_64 x86_64 x86_64 gnu/linux


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