From 4953018e23ba125272d9bcfd61a1a3040d211bf0 Mon Sep 17 00:00:00 2001 From: Carlos Santos Date: Wed, 8 Feb 2017 13:27:36 -0200 Subject: build-sys: improve detection of the "isnan" function in uClibc Since commit beceb14b450ded6560ed743634a5e80604a8edf3, MATH_LIBS is set to "-lm" when the isnan function is detected. In uClibc, however, isnan is a macro that calls __isnan, __isnanf, or __isnanl, depending on the size of the argument (double, float or long double). Fixes: http://autobuild.buildroot.net/results/2c2/2c29a78ed81ca844a87dcd076ab3e14ea080296d/ http://autobuild.buildroot.net/results/404/404b10f359b2ae8a7216729fa1bab37fed2d3d4c/ Signed-off-by: Carlos Santos --- configure.ac | 1 + 1 file changed, 1 insertion(+) (limited to 'configure.ac') diff --git a/configure.ac b/configure.ac index 37599212c..3bb3ba810 100644 --- a/configure.ac +++ b/configure.ac @@ -435,6 +435,7 @@ AM_CONDITIONAL([HAVE_OPENAT], [test "x$have_openat" = xyes]) AC_CHECK_FUNCS([isnan], [], [AC_CHECK_LIB([m], [isnan], [MATH_LIBS="-lm"])] + [AC_CHECK_LIB([m], [__isnan], [MATH_LIBS="-lm"])] ) AC_SUBST([MATH_LIBS]) -- cgit v1.2.3-55-g7522