xref: /PHP-5.4/Zend/acinclude.m4 (revision 1fe1f730) 
1dnl $Id$
2dnl
3dnl This file contains local autoconf functions.
4
5AC_DEFUN([LIBZEND_BISON_CHECK],[
6  # we only support certain bison versions
7  bison_version_list="1.28 1.35 1.75 1.875 2.0 2.1 2.2 2.3 2.4 2.4.1 2.4.2 2.4.3 2.5 2.5.1 2.6 2.6.1 2.6.2 2.6.4"
8
9  # for standalone build of Zend Engine
10  test -z "$SED" && SED=sed
11
12  bison_version=none
13  if test "$YACC"; then
14    AC_CACHE_CHECK([for bison version], php_cv_bison_version, [
15      bison_version_vars=`$YACC --version 2> /dev/null | grep 'GNU Bison' | cut -d ' ' -f 4 | $SED -e 's/\./ /g' | tr -d a-z`
16      php_cv_bison_version=invalid
17      if test -n "$bison_version_vars"; then
18        set $bison_version_vars
19        bison_version="${1}.${2}"
20        for bison_check_version in $bison_version_list; do
21          if test "$bison_version" = "$bison_check_version"; then
22            php_cv_bison_version="$bison_check_version (ok)"
23            break
24          fi
25        done
26      fi
27    ])
28  fi
29  case $php_cv_bison_version in
30    ""|invalid[)]
31      bison_msg="bison versions supported for regeneration of the Zend/PHP parsers: $bison_version_list (found: $bison_version)."
32      AC_MSG_WARN([$bison_msg])
33      YACC="exit 0;"
34      ;;
35  esac
36])
37
38AC_DEFUN([ZEND_FP_EXCEPT],[
39  AC_CACHE_CHECK(whether fp_except is defined, ac_cv_type_fp_except,[
40    AC_TRY_COMPILE([
41#include <floatingpoint.h>
42],[
43fp_except x = (fp_except) 0;
44],[
45     ac_cv_type_fp_except=yes
46],[
47     ac_cv_type_fp_except=no
48],[
49     ac_cv_type_fp_except=no
50])])
51  if test "$ac_cv_type_fp_except" = "yes"; then
52    AC_DEFINE(HAVE_FP_EXCEPT, 1, [whether floatingpoint.h defines fp_except])
53  fi
54])
55
56dnl
57dnl Check for broken sprintf()
58dnl
59AC_DEFUN([AC_ZEND_BROKEN_SPRINTF],[
60  AC_CACHE_CHECK(whether sprintf is broken, ac_cv_broken_sprintf,[
61    AC_TRY_RUN([main() {char buf[20];exit(sprintf(buf,"testing 123")!=11); }],[
62      ac_cv_broken_sprintf=no
63    ],[
64      ac_cv_broken_sprintf=yes
65    ],[
66      ac_cv_broken_sprintf=no
67    ])
68  ])
69  if test "$ac_cv_broken_sprintf" = "yes"; then
70    ac_result=1
71  else
72    ac_result=0
73  fi
74  AC_DEFINE_UNQUOTED(ZEND_BROKEN_SPRINTF, $ac_result, [Whether sprintf is broken])
75])
76
77dnl
78dnl AC_ZEND_C_BIGENDIAN
79dnl Replacement macro for AC_C_BIGENDIAN
80dnl
81AC_DEFUN([AC_ZEND_C_BIGENDIAN],
82[AC_CACHE_CHECK([whether byte ordering is bigendian], ac_cv_c_bigendian_php,
83 [
84  ac_cv_c_bigendian_php=unknown
85  AC_TRY_RUN(
86  [
87int main(void)
88{
89        short one = 1;
90        char *cp = (char *)&one;
91
92        if (*cp == 0) {
93                return(0);
94        } else {
95                return(1);
96        }
97}
98  ], [ac_cv_c_bigendian_php=yes], [ac_cv_c_bigendian_php=no], [ac_cv_c_bigendian_php=unknown])
99 ])
100 if test $ac_cv_c_bigendian_php = yes; then
101   AC_DEFINE(WORDS_BIGENDIAN, [], [Define if processor uses big-endian word])
102 fi
103])
104
105AC_DEFUN([AM_SET_LIBTOOL_VARIABLE],[
106  LIBTOOL='$(SHELL) $(top_builddir)/libtool $1'
107])
108
109dnl x87 floating point internal precision control checks
110dnl See: http://wiki.php.net/rfc/rounding
111AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[
112  AC_MSG_CHECKING([for usable _FPU_SETCW])
113  AC_TRY_LINK([
114    #include <fpu_control.h>
115  ],[
116    fpu_control_t fpu_oldcw, fpu_cw;
117    volatile double result;
118    double a = 2877.0;
119    volatile double b = 1000000.0;
120
121    _FPU_GETCW(fpu_oldcw);
122    fpu_cw = (fpu_oldcw & ~_FPU_EXTENDED & ~_FPU_SINGLE) | _FPU_DOUBLE;
123    _FPU_SETCW(fpu_cw);
124    result = a / b;
125    _FPU_SETCW(fpu_oldcw);
126  ], [ac_cfp_have__fpu_setcw=yes], [ac_cfp_have__fpu_setcw=no])
127  if test "$ac_cfp_have__fpu_setcw" = "yes" ; then
128    AC_DEFINE(HAVE__FPU_SETCW, 1, [whether _FPU_SETCW is present and usable])
129    AC_MSG_RESULT(yes)
130  else
131    AC_MSG_RESULT(no)
132  fi
133
134  AC_MSG_CHECKING([for usable fpsetprec])
135  AC_TRY_LINK([
136    #include <machine/ieeefp.h>
137  ],[
138    fp_prec_t fpu_oldprec;
139    volatile double result;
140    double a = 2877.0;
141    volatile double b = 1000000.0;
142
143    fpu_oldprec = fpgetprec();
144    fpsetprec(FP_PD);
145    result = a / b;
146    fpsetprec(fpu_oldprec);
147  ], [ac_cfp_have_fpsetprec=yes], [ac_cfp_have_fpsetprec=no])
148  if test "$ac_cfp_have_fpsetprec" = "yes" ; then
149    AC_DEFINE(HAVE_FPSETPREC, 1, [whether fpsetprec is present and usable])
150    AC_MSG_RESULT(yes)
151  else
152    AC_MSG_RESULT(no)
153  fi
154
155  AC_MSG_CHECKING([for usable _controlfp])
156  AC_TRY_LINK([
157    #include <float.h>
158  ],[
159    unsigned int fpu_oldcw;
160    volatile double result;
161    double a = 2877.0;
162    volatile double b = 1000000.0;
163
164    fpu_oldcw = _controlfp(0, 0);
165    _controlfp(_PC_53, _MCW_PC);
166    result = a / b;
167    _controlfp(fpu_oldcw, _MCW_PC);
168  ], [ac_cfp_have__controlfp=yes], [ac_cfp_have__controlfp=no])
169  if test "$ac_cfp_have__controlfp" = "yes" ; then
170    AC_DEFINE(HAVE__CONTROLFP, 1, [whether _controlfp is present usable])
171    AC_MSG_RESULT(yes)
172  else
173    AC_MSG_RESULT(no)
174  fi
175
176  AC_MSG_CHECKING([for usable _controlfp_s])
177  AC_TRY_LINK([
178   #include <float.h>
179  ],[
180    unsigned int fpu_oldcw, fpu_cw;
181    volatile double result;
182    double a = 2877.0;
183    volatile double b = 1000000.0;
184
185    _controlfp_s(&fpu_cw, 0, 0);
186    fpu_oldcw = fpu_cw;
187    _controlfp_s(&fpu_cw, _PC_53, _MCW_PC);
188    result = a / b;
189    _controlfp_s(&fpu_cw, fpu_oldcw, _MCW_PC);
190  ], [ac_cfp_have__controlfp_s=yes], [ac_cfp_have__controlfp_s=no])
191  if test "$ac_cfp_have__controlfp_s" = "yes" ; then
192    AC_DEFINE(HAVE__CONTROLFP_S, 1, [whether _controlfp_s is present and usable])
193    AC_MSG_RESULT(yes)
194  else
195    AC_MSG_RESULT(no)
196  fi
197
198  AC_MSG_CHECKING([whether FPU control word can be manipulated by inline assembler])
199  AC_TRY_LINK([
200    /* nothing */
201  ],[
202    unsigned int oldcw, cw;
203    volatile double result;
204    double a = 2877.0;
205    volatile double b = 1000000.0;
206
207    __asm__ __volatile__ ("fnstcw %0" : "=m" (*&oldcw));
208    cw = (oldcw & ~0x0 & ~0x300) | 0x200;
209    __asm__ __volatile__ ("fldcw %0" : : "m" (*&cw));
210
211    result = a / b;
212
213    __asm__ __volatile__ ("fldcw %0" : : "m" (*&oldcw));
214  ], [ac_cfp_have_fpu_inline_asm_x86=yes], [ac_cfp_have_fpu_inline_asm_x86=no])
215  if test "$ac_cfp_have_fpu_inline_asm_x86" = "yes" ; then
216    AC_DEFINE(HAVE_FPU_INLINE_ASM_X86, 1, [whether FPU control word can be manipulated by inline assembler])
217    AC_MSG_RESULT(yes)
218  else
219    AC_MSG_RESULT(no)
220  fi
221])
222