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define([_ACX_FUNC_FOPEN], [
AC_CACHE_CHECK([whether fopen accepts "$1" mode],
[cvx_cv_func_fopen_$1],
[AC_TRY_RUN([
#include <stdio.h>
int
main () {
FILE *fp = fopen("conftest.bin","w$1");
fprintf(fp,"\n");
fclose(fp);
return 0;
}],
[cvx_cv_func_fopen_$1=yes],
[cvx_cv_func_fopen_$1=no],
[cvx_cv_func_fopen_$1=no])])
if test x$cvx_cv_func_fopen_$1 = xyes; then
AC_DEFINE([$2], 1,
[Define this if we can use the "$1" mode for fopen safely.])
fi[]dnl
])
AC_DEFUN([ACX_FUNC_FOPEN_BINARY], [_ACX_FUNC_FOPEN(b, USE_FOPEN_BINARY)])
AC_DEFUN([ACX_FUNC_FOPEN_TEXT], [_ACX_FUNC_FOPEN(t, USE_FOPEN_TEXT)])
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