simplify check for sincos, - suggested fix for FreeBSD by kasperdanielhansen@gmail.com

diff --git a/configure.ac b/configure.ac
index 2199b8c09d09e08841816e3e852febb74f05bbed..c72e555d024ac7c29a21cba9ff51ac5473e43a77 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -449,7 +449,7 @@ AC_SUBST([MATH_LIBS])
 
 # Check for functions that might need -lm
 LIBS="$LIBS $MATH_LIBS"
-AC_CHECK_FUNCS([feenableexcept fesetenv log2])
+AC_CHECK_FUNCS([feenableexcept fesetenv log2 sincos])
 
 LIBS=$save_LIBS
 
@@ -2943,35 +2943,6 @@ else
 fi
 AM_CONDITIONAL(WITH_IPSEPCOLA, [test "x$use_ipsepcola" == "xYes"])
 
-# -----------------------------------
-# Special checks
-
-save_LIBS=$LIBS
-LIBS="$LIBS $MATH_LIBS"
-AC_MSG_CHECKING(if have working sincos())
-AC_RUN_IFELSE([AC_LANG_SOURCE([[
-       #include <stdio.h>
-       #include <assert.h>
-       #define PI 3.14159265358979323846
-       extern void sincos(double x, double *s, double *c);
-       int main () {
-               double sinx=0.0, cosx=1.0;
-                int i;
-                /* try to convince clever compilers not to optize this away! */
-                for (i=2; i<4; i++) {sincos(PI/(double)i,&sinx,&cosx);}
-               assert(sinx>0.8660253);
-               assert(sinx<0.8660255);
-               assert(cosx<0.5000001);
-               assert(cosx>0.4999999);
-               return 0;
-       }
-       ]])],[AC_MSG_RESULT(yes)
-       AC_DEFINE_UNQUOTED(HAVE_SINCOS,1,Define if libm provides a *working* sincos function)
-       ],[AC_MSG_RESULT(no)
-       ],[AC_MSG_RESULT(no - assumed because cross-compiling)
-       ])
-LIBS=$save_LIBS
-
 # -----------------------------------
 AC_MSG_CHECKING(if FILE struct contains _cnt)
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>