| Message ID | 1330013760-25793-1-git-send-email-peter.maydell@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 23 February 2012 16:16, Peter Maydell <peter.maydell@linaro.org> wrote: > Improve the configure test for presence of ucontext functions by > making linker warnings fatal; this allows us to detect when we are > linked with a glibc which implements makecontext() to always return > ENOSYS. Er, ignore this, emailed wrong patch by mistake! -- PMM
diff --git a/configure b/configure index 9b4fe34..4d9d9e0 100755 --- a/configure +++ b/configure @@ -2549,9 +2549,12 @@ ucontext_coroutine=no if test "$darwin" != "yes"; then cat > $TMPC << EOF #include <ucontext.h> -int main(void) { makecontext(0, 0, 0); } +int main(void) { makecontext(0, 0, 0); return 0; } EOF - if compile_prog "" "" ; then + # Note that we enable fatal linker warnings to catch the + # glibc "makecontext is not implemented and will always fail" + # linker warning. + if compile_prog "-Wl,--fatal-warnings" "" ; then ucontext_coroutine=yes fi fi
Improve the configure test for presence of ucontext functions by making linker warnings fatal; this allows us to detect when we are linked with a glibc which implements makecontext() to always return ENOSYS. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- Compiling on an Ubuntu Natty ARM host will hit this. (Anybody think we should clean up our configure tests so we can enable -Werror and -Wl,--fatal-warnings on all of them?) configure | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-)