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dnl This file contains local autoconf functions.
AC_DEFUN([LIBZEND_BISON_CHECK],[
# we only support certain bison versions;
# min: 2.4 (i.e. 204, major * 100 + minor for easier comparison)
bison_version_min="204"
# non-working versions, e.g. "3.0 3.2";
# remove "none" when introducing the first incompatible bison version an
# separate any following additions by spaces
bison_version_exclude=""
# for standalone build of Zend Engine
test -z "$SED" && SED=sed
bison_version=none
if test "$YACC"; then
AC_CACHE_CHECK([for bison version], php_cv_bison_version, [
bison_version_vars=`$YACC --version 2> /dev/null | grep 'GNU Bison' | cut -d ' ' -f 4 | $SED -e 's/\./ /g' | tr -d a-z`
php_cv_bison_version=invalid
if test -n "$bison_version_vars"; then
set $bison_version_vars
bison_version="${1}.${2}"
bison_version_num="`expr ${1} \* 100 + ${2}`"
if test $bison_version_num -ge $bison_version_min; then
php_cv_bison_version="$bison_version (ok)"
for bison_check_version in $bison_version_exclude; do
if test "$bison_version" = "$bison_check_version"; then
php_cv_bison_version=invalid
break
fi
done
fi
fi
])
fi
case $php_cv_bison_version in
""|invalid[)]
bison_msg="This bison version is not supported for regeneration of the Zend/PHP parsers (found: $bison_version, min: $bison_version_min, excluded: $bison_version_exclude)."
AC_MSG_WARN([$bison_msg])
YACC="exit 0;"
;;
esac
])
dnl x87 floating point internal precision control checks
dnl See: http://wiki.php.net/rfc/rounding
AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[
AC_MSG_CHECKING([for usable _FPU_SETCW])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <fpu_control.h>
]],[[
fpu_control_t fpu_oldcw, fpu_cw;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
_FPU_GETCW(fpu_oldcw);
fpu_cw = (fpu_oldcw & ~_FPU_EXTENDED & ~_FPU_SINGLE) | _FPU_DOUBLE;
_FPU_SETCW(fpu_cw);
result = a / b;
_FPU_SETCW(fpu_oldcw);
]])],[ac_cfp_have__fpu_setcw=yes],[ac_cfp_have__fpu_setcw=no])
if test "$ac_cfp_have__fpu_setcw" = "yes" ; then
AC_DEFINE(HAVE__FPU_SETCW, 1, [whether _FPU_SETCW is present and usable])
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING([for usable fpsetprec])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <machine/ieeefp.h>
]],[[
fp_prec_t fpu_oldprec;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
fpu_oldprec = fpgetprec();
fpsetprec(FP_PD);
result = a / b;
fpsetprec(fpu_oldprec);
]])], [ac_cfp_have_fpsetprec=yes], [ac_cfp_have_fpsetprec=no])
if test "$ac_cfp_have_fpsetprec" = "yes" ; then
AC_DEFINE(HAVE_FPSETPREC, 1, [whether fpsetprec is present and usable])
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING([for usable _controlfp])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <float.h>
]],[[
unsigned int fpu_oldcw;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
fpu_oldcw = _controlfp(0, 0);
_controlfp(_PC_53, _MCW_PC);
result = a / b;
_controlfp(fpu_oldcw, _MCW_PC);
]])], [ac_cfp_have__controlfp=yes], [ac_cfp_have__controlfp=no])
if test "$ac_cfp_have__controlfp" = "yes" ; then
AC_DEFINE(HAVE__CONTROLFP, 1, [whether _controlfp is present usable])
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING([for usable _controlfp_s])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <float.h>
]],[[
unsigned int fpu_oldcw, fpu_cw;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
_controlfp_s(&fpu_cw, 0, 0);
fpu_oldcw = fpu_cw;
_controlfp_s(&fpu_cw, _PC_53, _MCW_PC);
result = a / b;
_controlfp_s(&fpu_cw, fpu_oldcw, _MCW_PC);
]])], [ac_cfp_have__controlfp_s=yes], [ac_cfp_have__controlfp_s=no])
if test "$ac_cfp_have__controlfp_s" = "yes" ; then
AC_DEFINE(HAVE__CONTROLFP_S, 1, [whether _controlfp_s is present and usable])
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING([whether FPU control word can be manipulated by inline assembler])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
/* nothing */
]],[[
unsigned int oldcw, cw;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
__asm__ __volatile__ ("fnstcw %0" : "=m" (*&oldcw));
cw = (oldcw & ~0x0 & ~0x300) | 0x200;
__asm__ __volatile__ ("fldcw %0" : : "m" (*&cw));
result = a / b;
__asm__ __volatile__ ("fldcw %0" : : "m" (*&oldcw));
]])], [ac_cfp_have_fpu_inline_asm_x86=yes], [ac_cfp_have_fpu_inline_asm_x86=no])
if test "$ac_cfp_have_fpu_inline_asm_x86" = "yes" ; then
AC_DEFINE(HAVE_FPU_INLINE_ASM_X86, 1, [whether FPU control word can be manipulated by inline assembler])
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
])
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