mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-06-09 23:29:52 +00:00
2532fa21a9
- This currently just moves over all of the behavior from LLVM. Eventually all of the configure checks that are directly needed by the LLVM build setup should probably go away, and the project should manage their own configuration checks if necessary. - This is the 1st half of this work, the actual Makefile.common hasn't moved over yet. I've tried to stage this in such a way that incremental builds will properly reconfigure for most active developers (the Makefiles don't handle reconfiguring in a perfectly reliable way, and I haven't found an easy way to make them do so). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142456 91177308-0d34-0410-b5e6-96231b3b80d8
32 lines
791 B
Plaintext
32 lines
791 B
Plaintext
#
|
|
# Determine if the printf() functions have the %a format character.
|
|
# This is modified from:
|
|
# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_slist.html
|
|
AC_DEFUN([AC_C_PRINTF_A],
|
|
[AC_CACHE_CHECK([if printf has the %a format character],[llvm_cv_c_printf_a],
|
|
[AC_LANG_PUSH([C])
|
|
AC_RUN_IFELSE([
|
|
AC_LANG_PROGRAM([[
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
]],[[
|
|
volatile double A, B;
|
|
char Buffer[100];
|
|
A = 1;
|
|
A /= 10.0;
|
|
sprintf(Buffer, "%a", A);
|
|
B = atof(Buffer);
|
|
if (A != B)
|
|
return (1);
|
|
if (A != 0x1.999999999999ap-4)
|
|
return (1);
|
|
return (0);]])],
|
|
llvm_cv_c_printf_a=yes,
|
|
llvmac_cv_c_printf_a=no,
|
|
llvmac_cv_c_printf_a=no)
|
|
AC_LANG_POP([C])])
|
|
if test "$llvm_cv_c_printf_a" = "yes"; then
|
|
AC_DEFINE([HAVE_PRINTF_A],[1],[Define to have the %a format string])
|
|
fi
|
|
])
|