mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-25 09:30:58 +00:00
51 lines
1.3 KiB
Plaintext
51 lines
1.3 KiB
Plaintext
dnl GCC_CHECK_LIBM
|
|
dnl
|
|
dnl Check whether -lm is available. This is a pre-requisite for
|
|
dnl GCC_CHECK_MATH_FUNC so that it will link with -lm.
|
|
AC_DEFUN([GCC_CHECK_LIBM],
|
|
[AC_CHECK_LIB([m],[sin])])
|
|
|
|
dnl GCC_CHECK_MATH_HEADERS
|
|
dnl
|
|
dnl Check for math.h and complex.h. This is a pre-requisite for
|
|
dnl GCC_CHECK_MATH_FUNC so that it includes the right headers.
|
|
dnl (Some systems, such as AIX or OpenVMS may define macro for math
|
|
dnl functions).
|
|
AC_DEFUN([GCC_CHECK_MATH_HEADERS],
|
|
[AC_CHECK_HEADERS_ONCE(math.h complex.h)])
|
|
|
|
dnl GCC_CHECK_MATH_FUNC([name])
|
|
dnl
|
|
dnl Check whether math function NAME is available on the system (by compiling
|
|
dnl and linking a C program) and run define HAVE_name on success.
|
|
dnl
|
|
dnl Note that OpenVMS system insists on including complex.h before math.h
|
|
AC_DEFUN([GCC_CHECK_MATH_FUNC],
|
|
[
|
|
AC_REQUIRE([GCC_CHECK_LIBM])
|
|
AC_REQUIRE([GCC_CHECK_MATH_HEADERS])
|
|
AC_CACHE_CHECK([for $1], [gcc_cv_math_func_$1],
|
|
[AC_LINK_IFELSE([
|
|
#ifdef HAVE_COMPLEX_H
|
|
#include <complex.h>
|
|
#endif
|
|
#ifdef HAVE_MATH_H
|
|
#include <math.h>
|
|
#endif
|
|
|
|
int (*ptr)() = (int (*)())$1;
|
|
|
|
int
|
|
main ()
|
|
{
|
|
return 0;
|
|
}
|
|
],
|
|
[gcc_cv_math_func_$1=yes],
|
|
[gcc_cv_math_func_$1=no])])
|
|
if test $gcc_cv_math_func_$1 = yes; then
|
|
AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$1),[1],
|
|
[Define to 1 if you have the `$1' function.])
|
|
fi
|
|
])
|