TIME_UTC and timespec_get were not declared with gcc installed by anaconda
I tried to install the latest anaconda with cxx-compiler and compilers and attempted to compile a c file, 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 successfully. I tried the solution from https://root-forum.cern.ch/t/error-timespec-get-has-not-been-declared-with-conda-root-package/45712/6 and made sure that packages from conda-forge have higher priority, but it did not work for me.
I've tried searching 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.c:
#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
gcc test.c
Here is the error reported by gcc
test.c: In function 'get_nanos':
test.c:9:9: warning: implicit declaration of function 'timespec_get' [-Wimplicit-function-declaration]
9 | timespec_get(&ts, TIME_UTC);
| ^~~~~~~~~~~~
test.c:9:27: error: 'TIME_UTC' undeclared (first use in this function)
9 | timespec_get(&ts, TIME_UTC);
| ^~~~~~~~
test.c:9:27: note: each undeclared identifier is reported only once for each function it appears in
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
This is the version of gcc installed by conda
(test_env) ➜ test_dir gcc --version
gcc (conda-forge gcc 11.3.0-19) 11.3.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
