https://bugs.gentoo.org/650876 --- a/build-aux/ltmain.sh +++ b/build-aux/ltmain.sh @@ -7127,6 +7127,16 @@ *" $arg "*) ;; * ) func_append new_inherited_linker_flags " $arg" ;; esac + + # As we are forced to pass -nostdlib to g++ during linking, the option + # -pthread{,s} is not in effect; add the -lpthread to $deplist + # explicitly to link correctly. + if test "$tagname" = CXX -a x"$with_gcc" = xyes; then + case "$arg" in + -pthread*) func_append deplibs " -lpthread" ;; + esac + fi + continue ;;