From 03bf456cb5b65ff7cfabfab3758ca8f3c6816556 Mon Sep 17 00:00:00 2001 From: Cyril Hrubis Date: Thu, 4 Sep 2014 11:28:55 +0200 Subject: [PATCH] realtime: Fix exp10 check. The parameter to exp10() function was constant and because of that it was substituted by a constant at the compile time. This patch passes volatile float as the parameter and also adds -lm to the LIBS which is needed to link the test. Reported-by: Waldemar Brodkorb Signed-off-by: Cyril Hrubis --- testcases/realtime/m4/ltp-exp10.m4 | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/testcases/realtime/m4/ltp-exp10.m4 b/testcases/realtime/m4/ltp-exp10.m4 index 4fe7091..84a3d9b 100644 --- a/testcases/realtime/m4/ltp-exp10.m4 +++ b/testcases/realtime/m4/ltp-exp10.m4 @@ -24,10 +24,14 @@ AC_DEFUN([LTP_CHECK_EXP10],[ AH_TEMPLATE(HAVE_EXP10, [Define to 1 if you have 'exp10' function.]) AC_MSG_CHECKING([for exp10]) +backup_ldlibs="$LIBS" +LIBS+=" -lm" AC_TRY_LINK([#define _GNU_SOURCE #include ], [ - exp10(0.00); + volatile float val; + exp10(val); ], AC_DEFINE(HAVE_EXP10) AC_MSG_RESULT(yes), AC_MSG_RESULT(no)) +LIBS="$backup_ldlibs" ]) -- 1.8.5.5