Revert r104165.

[oota-llvm.git] / autoconf / m4 / single_cxx_check.m4

diff --git a/autoconf/m4/single_cxx_check.m4 b/autoconf/m4/single_cxx_check.m4
index c5e4b199c6704eeeeaea51d04308eb57b84f3596..21efa4bed353fbd35383fd48779cfd3c6f20cd02 100644 (file)
--- a/autoconf/m4/single_cxx_check.m4
+++ b/autoconf/m4/single_cxx_check.m4
@@ -1,48 +1,10 @@
-dnl AC_SINGLE_CXX_CHECK(DEFINEVAR, CACHEVAR, FUNCTION, HEADER, PROGRAM)
-dnl                     $1,        $2,       $3,       $4,     $5
+dnl AC_SINGLE_CXX_CHECK(CACHEVAR, FUNCTION, HEADER, PROGRAM)
+dnl                     $1,       $2,       $3,     $4,     
 dnl 
 AC_DEFUN([AC_SINGLE_CXX_CHECK],
-[AC_CACHE_CHECK([for $3 in $4], [$2],
- [AC_LANG_PUSH(C++)
-  AC_COMPILE_IFELSE(AC_LANG_SOURCE([$5]),[$2=yes],[$2=no])
- AC_LANG_POP(C++)])
- if test "$$2" = "yes"
- then
-   AC_DEFINE($1, 1, [Define to 1 if your compiler defines $3 in the $4
-                     header file.])
- fi])
-
-AC_DEFUN([AC_FUNC_ISNAN],[
-AC_SINGLE_CXX_CHECK([HAVE_ISNAN_IN_MATH_H],    [ac_cv_func_isnan_in_math_h],   
-                    [isnan], [<math.h>],
-                    [#include <math.h>
-                     int foo(float f) {return isnan(f);}])
-AC_SINGLE_CXX_CHECK([HAVE_ISNAN_IN_CMATH],     [ac_cv_func_isnan_in_cmath],    
-                    [isnan], [<cmath>],
-                    [#include <cmath>
-                     int foo(float f) {return isnan(f);}])
-AC_SINGLE_CXX_CHECK([HAVE_STD_ISNAN_IN_CMATH], [ac_cv_func_std_isnan_in_cmath],
-                    [std::isnan], [<cmath>],
-                    [#include <cmath>
-                     using std::isnan; int foo(float f) {return isnan(f);}])
-])
-
-AC_DEFUN([AC_FUNC_ISINF],[
-AC_SINGLE_CXX_CHECK([HAVE_ISINF_IN_MATH_H],    [ac_cv_func_isinf_in_math_h],   
-                    [isinf], [<math.h>],
-                    [#include <math.h>
-                     int foo(float f) {return isinf(f);}])
-AC_SINGLE_CXX_CHECK([HAVE_ISINF_IN_CMATH],     [ac_cv_func_isinf_in_cmath],    
-                    [isinf], [<cmath>],
-                    [#include <cmath>
-                     int foo(float f) {return isinf(f);}])
-AC_SINGLE_CXX_CHECK([HAVE_STD_ISINF_IN_CMATH], [ac_cv_func_std_isinf_in_cmath],
-                    [std::isinf], [<cmath>],
-                    [#include <cmath>
-                     using std::isinf; int foo(float f) {return isinf(f);}])
-AC_SINGLE_CXX_CHECK([HAVE_FINITE_IN_IEEEFP_H], [ac_cv_func_finite_in_ieeefp_h],
-                    [finite], [<ieeefp.h>],
-                    [#include <ieeefp.h>
-                     int foo(float f) {return finite(f);}])
-])
+ [AC_CACHE_CHECK([for $2 in $3], [$1],
+  [AC_LANG_PUSH([C++])
+   AC_COMPILE_IFELSE(AC_LANG_PROGRAM([#include $3],[$4]),[$1=yes],[$1=no])
+  AC_LANG_POP([C++])])
+ ])