TIME_UTC and timespec_get not declared with g++ installed by anaconda
I tried to install the latest anaconda with cxx-compiler and compilers and attempted to compile a c++ library, but it failed due to undeclared TIME_UTC marco and timespec_get function, which should have been included in the time.h file. However, my system compiler compiled the file sucessfully. I tried the solution from "error: '::timespec_get' has not been declared" with conda root package - #6 by kkrizka - ROOT - ROOT Forum and made sure that packages from conda-forge have higher priority, but it did not work for me.
I’ve tried search some other keywords but can’t seem to find similar cases on Google. So any hints/suggestions are appreciated.
Minimal Example
We start with a simple test example test.cc (It’s in C style, though it is expected to compile with C++ compiler):
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
// from https://stackoverflow.com/a/36095407
// Get the current time in nanoseconds
long get_nanos() {
struct timespec ts;
timespec_get(&ts, TIME_UTC);
return (long)ts.tv_sec * 1000000000L + ts.tv_nsec;
}
int main() {
// print time
long test_time = get_nanos();
printf("Time: %ld\n", test_time);
}
Create a fresh environment
conda create -n test_env
conda activate test_env
conda install -c conda-forge compilers cxx-compiler
g++ test.cc
Here is the error reported by g++
test.cc: In function 'long int get_nanos()':
test.cc:9:27: error: 'TIME_UTC' was not declared in this scope
9 | timespec_get(&ts, TIME_UTC);
| ^~~~~~~~
test.cc:9:9: error: 'timespec_get' was not declared in this scope; did you mean 'timespec'?
9 | timespec_get(&ts, TIME_UTC);
| ^~~~~~~~~~~~
| timespec
For reference, this is the output of conda list after the above commands to make sure packages are coming from conda-forge
# Name Version Build Channel
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 2_gnu conda-forge
binutils 2.39 hdd6e379_1 conda-forge
binutils_impl_linux-64 2.39 he00db2b_1 conda-forge
binutils_linux-64 2.39 h5fc0e48_13 conda-forge
c-compiler 1.5.2 h0b41bf4_0 conda-forge
compilers 1.5.2 ha770c72_0 conda-forge
cxx-compiler 1.5.2 hf52228f_0 conda-forge
fortran-compiler 1.5.2 hdb1a99f_0 conda-forge
gcc 11.3.0 h02d0930_13 conda-forge
gcc_impl_linux-64 11.3.0 hab1b70f_19 conda-forge
gcc_linux-64 11.3.0 he6f903b_13 conda-forge
gfortran 11.3.0 ha859ce3_13 conda-forge
gfortran_impl_linux-64 11.3.0 he34c6f7_19 conda-forge
gfortran_linux-64 11.3.0 h3c55166_13 conda-forge
gxx 11.3.0 h02d0930_13 conda-forge
gxx_impl_linux-64 11.3.0 hab1b70f_19 conda-forge
gxx_linux-64 11.3.0 hc203a17_13 conda-forge
kernel-headers_linux-64 2.6.32 he073ed8_15 conda-forge
ld_impl_linux-64 2.39 hcc3a1bd_1 conda-forge
libgcc-devel_linux-64 11.3.0 h210ce93_19 conda-forge
libgcc-ng 12.2.0 h65d4601_19 conda-forge
libgfortran5 12.2.0 h337968e_19 conda-forge
libgomp 12.2.0 h65d4601_19 conda-forge
libsanitizer 11.3.0 h239ccf8_19 conda-forge
libstdcxx-devel_linux-64 11.3.0 h210ce93_19 conda-forge
libstdcxx-ng 12.2.0 h46fd767_19 conda-forge
sysroot_linux-64 2.12 he073ed8_15 conda-forge