As we are forced to pass -nostdlib to g++ for linking, this option expectedly disables the effectiveness of passed -pthread flag - so add the -lpthread explicitly to $deplibs to link correctly.
References: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460 https://bugzilla.redhat.com/show_bug.cgi?id=661333 http://lists.gnu.org/archive/html/bug-libtool/2013-01/msg00018.htm * build-aux/ltmain.in (func_mode_link): Explicitly add -lpthread flag into $deplibs when -pthread is passed (for g++ only). --- build-aux/ltmain.in | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/build-aux/ltmain.in b/build-aux/ltmain.in index fba05c1..f202b80 100644 --- a/build-aux/ltmain.in +++ b/build-aux/ltmain.in @@ -5113,6 +5113,16 @@ func_mode_link () *" $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 ;; -- 1.8.4.2
