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Individual autoconf function broken out of acincludes.m4. This change

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per the recommended style guide for autoconf and so that individual
autoconf functions can more easily be shared across projects.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16223 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2004-09-07 06:56:14 +00:00
parent 10c0a2e7f9
commit 491f6812ef
15 changed files with 435 additions and 0 deletions
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48
autoconf/m4/single_cxx_check.m4 Normal file
View File

@@ -0,0 +1,48 @@
dnl AC_SINGLE_CXX_CHECK(DEFINEVAR, CACHEVAR, FUNCTION, HEADER, PROGRAM)
dnl $1, $2, $3, $4, $5
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);}])
])