From: John Ellson <ellson@research.att.com>
Date: Wed, 27 Feb 2013 21:27:58 +0000 (-0500)
Subject: simplify check for sincos, - suggested fix for FreeBSD by kasperdanielhansen@gmail.com
X-Git-Tag: LAST_LIBGRAPH~32^2~222
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=cf864b518e7acc2906a5f30b5a011acefd604e08;p=graphviz

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

diff --git a/configure.ac b/configure.ac
index 2199b8c09..c72e555d0 100644
--- 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>