1dnl This file contains Zend specific autoconf macros. 2 3dnl 4dnl ZEND_CHECK_FLOAT_PRECISION 5dnl 6dnl x87 floating point internal precision control checks 7dnl See: http://wiki.php.net/rfc/rounding 8dnl 9AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[ 10 AC_MSG_CHECKING([for usable _FPU_SETCW]) 11 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 12 #include <fpu_control.h> 13 ]],[[ 14 fpu_control_t fpu_oldcw, fpu_cw; 15 volatile double result; 16 double a = 2877.0; 17 volatile double b = 1000000.0; 18 19 _FPU_GETCW(fpu_oldcw); 20 fpu_cw = (fpu_oldcw & ~_FPU_EXTENDED & ~_FPU_SINGLE) | _FPU_DOUBLE; 21 _FPU_SETCW(fpu_cw); 22 result = a / b; 23 _FPU_SETCW(fpu_oldcw); 24 ]])],[ac_cfp_have__fpu_setcw=yes],[ac_cfp_have__fpu_setcw=no]) 25 if test "$ac_cfp_have__fpu_setcw" = "yes" ; then 26 AC_DEFINE(HAVE__FPU_SETCW, 1, [whether _FPU_SETCW is present and usable]) 27 AC_MSG_RESULT(yes) 28 else 29 AC_MSG_RESULT(no) 30 fi 31 32 AC_MSG_CHECKING([for usable fpsetprec]) 33 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 34 #include <machine/ieeefp.h> 35 ]],[[ 36 fp_prec_t fpu_oldprec; 37 volatile double result; 38 double a = 2877.0; 39 volatile double b = 1000000.0; 40 41 fpu_oldprec = fpgetprec(); 42 fpsetprec(FP_PD); 43 result = a / b; 44 fpsetprec(fpu_oldprec); 45 ]])], [ac_cfp_have_fpsetprec=yes], [ac_cfp_have_fpsetprec=no]) 46 if test "$ac_cfp_have_fpsetprec" = "yes" ; then 47 AC_DEFINE(HAVE_FPSETPREC, 1, [whether fpsetprec is present and usable]) 48 AC_MSG_RESULT(yes) 49 else 50 AC_MSG_RESULT(no) 51 fi 52 53 AC_MSG_CHECKING([for usable _controlfp]) 54 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 55 #include <float.h> 56 ]],[[ 57 unsigned int fpu_oldcw; 58 volatile double result; 59 double a = 2877.0; 60 volatile double b = 1000000.0; 61 62 fpu_oldcw = _controlfp(0, 0); 63 _controlfp(_PC_53, _MCW_PC); 64 result = a / b; 65 _controlfp(fpu_oldcw, _MCW_PC); 66 ]])], [ac_cfp_have__controlfp=yes], [ac_cfp_have__controlfp=no]) 67 if test "$ac_cfp_have__controlfp" = "yes" ; then 68 AC_DEFINE(HAVE__CONTROLFP, 1, [whether _controlfp is present usable]) 69 AC_MSG_RESULT(yes) 70 else 71 AC_MSG_RESULT(no) 72 fi 73 74 AC_MSG_CHECKING([for usable _controlfp_s]) 75 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 76 #include <float.h> 77 ]],[[ 78 unsigned int fpu_oldcw, fpu_cw; 79 volatile double result; 80 double a = 2877.0; 81 volatile double b = 1000000.0; 82 83 _controlfp_s(&fpu_cw, 0, 0); 84 fpu_oldcw = fpu_cw; 85 _controlfp_s(&fpu_cw, _PC_53, _MCW_PC); 86 result = a / b; 87 _controlfp_s(&fpu_cw, fpu_oldcw, _MCW_PC); 88 ]])], [ac_cfp_have__controlfp_s=yes], [ac_cfp_have__controlfp_s=no]) 89 if test "$ac_cfp_have__controlfp_s" = "yes" ; then 90 AC_DEFINE(HAVE__CONTROLFP_S, 1, [whether _controlfp_s is present and usable]) 91 AC_MSG_RESULT(yes) 92 else 93 AC_MSG_RESULT(no) 94 fi 95 96 AC_MSG_CHECKING([whether FPU control word can be manipulated by inline assembler]) 97 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 98 /* nothing */ 99 ]],[[ 100 unsigned int oldcw, cw; 101 volatile double result; 102 double a = 2877.0; 103 volatile double b = 1000000.0; 104 105 __asm__ __volatile__ ("fnstcw %0" : "=m" (*&oldcw)); 106 cw = (oldcw & ~0x0 & ~0x300) | 0x200; 107 __asm__ __volatile__ ("fldcw %0" : : "m" (*&cw)); 108 109 result = a / b; 110 111 __asm__ __volatile__ ("fldcw %0" : : "m" (*&oldcw)); 112 ]])], [ac_cfp_have_fpu_inline_asm_x86=yes], [ac_cfp_have_fpu_inline_asm_x86=no]) 113 if test "$ac_cfp_have_fpu_inline_asm_x86" = "yes" ; then 114 AC_DEFINE(HAVE_FPU_INLINE_ASM_X86, 1, [whether FPU control word can be manipulated by inline assembler]) 115 AC_MSG_RESULT(yes) 116 else 117 AC_MSG_RESULT(no) 118 fi 119]) 120 121dnl 122dnl LIBZEND_BASIC_CHECKS 123dnl 124dnl Basic checks specific for the Zend engine library. 125dnl 126AC_DEFUN([LIBZEND_BASIC_CHECKS],[ 127AC_REQUIRE([AC_PROG_CC]) 128 129AC_CHECK_HEADERS([cpuid.h]) 130 131dnl 132dnl LIBZEND_DLSYM_CHECK 133dnl 134dnl Ugly hack to check if dlsym() requires a leading underscore in symbol name. 135dnl 136AC_DEFUN([LIBZEND_DLSYM_CHECK],[ 137AC_MSG_CHECKING([whether dlsym() requires a leading underscore in symbol names]) 138_LT_AC_TRY_DLOPEN_SELF([ 139 AC_MSG_RESULT(no) 140], [ 141 AC_MSG_RESULT(yes) 142 AC_DEFINE(DLSYM_NEEDS_UNDERSCORE, 1, [Define if dlsym() requires a leading underscore in symbol names. ]) 143], [ 144 AC_MSG_RESULT(no) 145], []) 146]) 147 148dnl Checks for library functions. 149AC_CHECK_FUNCS(getpid kill sigsetjmp) 150 151ZEND_CHECK_FLOAT_PRECISION 152 153dnl Test whether double cast to long preserves least significant bits. 154AC_MSG_CHECKING(whether double cast to long preserves least significant bits) 155 156AC_RUN_IFELSE([AC_LANG_SOURCE([[ 157#include <limits.h> 158#include <stdlib.h> 159 160int main() 161{ 162 if (sizeof(long) == 4) { 163 double d = (double) LONG_MIN * LONG_MIN + 2e9; 164 165 if ((long) d == 2e9 && (long) -d == -2e9) { 166 return 0; 167 } 168 } else if (sizeof(long) == 8) { 169 double correct = 18e18 - ((double) LONG_MIN * -2); /* Subtract ULONG_MAX + 1 */ 170 171 if ((long) 18e18 == correct) { /* On 64-bit, only check between LONG_MAX and ULONG_MAX */ 172 return 0; 173 } 174 } 175 return 1; 176} 177]])], [ 178 AC_DEFINE([ZEND_DVAL_TO_LVAL_CAST_OK], 1, [Define if double cast to long preserves least significant bits]) 179 AC_MSG_RESULT(yes) 180], [ 181 AC_MSG_RESULT(no) 182], [ 183 AC_MSG_RESULT(no) 184]) 185 186]) 187 188dnl 189dnl LIBZEND_OTHER_CHECKS 190dnl 191AC_DEFUN([LIBZEND_OTHER_CHECKS],[ 192 193AC_MSG_CHECKING(whether to enable thread-safety) 194AC_MSG_RESULT($ZEND_ZTS) 195 196AC_MSG_CHECKING(whether to enable Zend debugging) 197AC_MSG_RESULT($ZEND_DEBUG) 198 199if test "$ZEND_DEBUG" = "yes"; then 200 AC_DEFINE(ZEND_DEBUG,1,[ ]) 201 echo " $CFLAGS" | grep ' -g' >/dev/null || DEBUG_CFLAGS="-g" 202 if test "$CFLAGS" = "-g -O2"; then 203 CFLAGS=-g 204 fi 205else 206 AC_DEFINE(ZEND_DEBUG,0,[ ]) 207fi 208 209test -n "$GCC" && CFLAGS="-Wall -Wextra -Wno-strict-aliasing -Wno-unused-parameter -Wno-sign-compare $CFLAGS" 210dnl Check if compiler supports -Wno-clobbered (only GCC) 211AX_CHECK_COMPILE_FLAG([-Wno-clobbered], CFLAGS="-Wno-clobbered $CFLAGS", , [-Werror]) 212dnl Check for support for implicit fallthrough level 1, also add after previous CFLAGS as level 3 is enabled in -Wextra 213AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough=1], CFLAGS="$CFLAGS -Wimplicit-fallthrough=1", , [-Werror]) 214AX_CHECK_COMPILE_FLAG([-Wduplicated-cond], CFLAGS="-Wduplicated-cond $CFLAGS", , [-Werror]) 215AX_CHECK_COMPILE_FLAG([-Wlogical-op], CFLAGS="-Wlogical-op $CFLAGS", , [-Werror]) 216AX_CHECK_COMPILE_FLAG([-Wformat-truncation], CFLAGS="-Wformat-truncation $CFLAGS", , [-Werror]) 217AX_CHECK_COMPILE_FLAG([-Wstrict-prototypes], CFLAGS="-Wstrict-prototypes $CFLAGS", , [-Werror]) 218AX_CHECK_COMPILE_FLAG([-fno-common], CFLAGS="-fno-common $CFLAGS", , [-Werror]) 219 220test -n "$DEBUG_CFLAGS" && CFLAGS="$CFLAGS $DEBUG_CFLAGS" 221 222if test "$ZEND_ZTS" = "yes"; then 223 AC_DEFINE(ZTS,1,[ ]) 224 CFLAGS="$CFLAGS -DZTS" 225fi 226 227AC_C_INLINE 228 229AC_MSG_CHECKING(target system is Darwin) 230if echo "$target" | grep "darwin" > /dev/null; then 231 AC_DEFINE([DARWIN], 1, [Define if the target system is darwin]) 232 AC_MSG_RESULT(yes) 233else 234 AC_MSG_RESULT(no) 235fi 236 237dnl Test and set the alignment define for ZEND_MM. This also does the 238dnl logarithmic test for ZEND_MM. 239AC_MSG_CHECKING(for MM alignment and log values) 240 241AC_RUN_IFELSE([AC_LANG_SOURCE([[ 242#include <stdio.h> 243#include <stdlib.h> 244 245typedef union _mm_align_test { 246 void *ptr; 247 double dbl; 248 long lng; 249} mm_align_test; 250 251#if (defined (__GNUC__) && __GNUC__ >= 2) 252#define ZEND_MM_ALIGNMENT (__alignof__ (mm_align_test)) 253#else 254#define ZEND_MM_ALIGNMENT (sizeof(mm_align_test)) 255#endif 256 257int main() 258{ 259 int i = ZEND_MM_ALIGNMENT; 260 int zeros = 0; 261 FILE *fp; 262 263 while (i & ~0x1) { 264 zeros++; 265 i = i >> 1; 266 } 267 268 fp = fopen("conftest.zend", "w"); 269 fprintf(fp, "%d %d\n", ZEND_MM_ALIGNMENT, zeros); 270 fclose(fp); 271 272 return 0; 273} 274]])], [ 275 LIBZEND_MM_ALIGN=`cat conftest.zend | cut -d ' ' -f 1` 276 LIBZEND_MM_ALIGN_LOG2=`cat conftest.zend | cut -d ' ' -f 2` 277 AC_DEFINE_UNQUOTED(ZEND_MM_ALIGNMENT, $LIBZEND_MM_ALIGN, [ ]) 278 AC_DEFINE_UNQUOTED(ZEND_MM_ALIGNMENT_LOG2, $LIBZEND_MM_ALIGN_LOG2, [ ]) 279], [], [ 280 dnl Cross compilation needs something here. 281 AC_DEFINE_UNQUOTED(ZEND_MM_ALIGNMENT, 8, [ ]) 282 AC_DEFINE_UNQUOTED(ZEND_MM_ALIGNMENT_LOG2, 3, [ ]) 283]) 284 285AC_MSG_RESULT(done) 286 287AC_CHECK_FUNCS(mremap) 288 289AC_ARG_ENABLE([zend-signals], 290 [AS_HELP_STRING([--disable-zend-signals], 291 [whether to enable zend signal handling])], 292 [ZEND_SIGNALS=$enableval], 293 [ZEND_SIGNALS=yes]) 294 295AC_CHECK_FUNCS([sigaction], [], [ 296 ZEND_SIGNALS=no 297]) 298if test "$ZEND_SIGNALS" = "yes"; then 299 AC_DEFINE(ZEND_SIGNALS, 1, [Use zend signal handling]) 300 CFLAGS="$CFLAGS -DZEND_SIGNALS" 301fi 302 303AC_MSG_CHECKING(whether to enable zend signal handling) 304AC_MSG_RESULT($ZEND_SIGNALS) 305 306]) 307 308AC_MSG_CHECKING(whether /dev/urandom exists) 309if test -r "/dev/urandom" && test -c "/dev/urandom"; then 310 AC_DEFINE([HAVE_DEV_URANDOM], 1, [Define if the target system has /dev/urandom device]) 311 AC_MSG_RESULT(yes) 312else 313 AC_MSG_RESULT(no) 314fi 315 316AC_ARG_ENABLE([gcc-global-regs], 317 [AS_HELP_STRING([--disable-gcc-global-regs], 318 [whether to enable GCC global register variables])], 319 [ZEND_GCC_GLOBAL_REGS=$enableval], 320 [ZEND_GCC_GLOBAL_REGS=yes]) 321 322AC_MSG_CHECKING(for global register variables support) 323if test "$ZEND_GCC_GLOBAL_REGS" != "no"; then 324 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 325#if defined(__GNUC__) 326# define ZEND_GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) 327#else 328# define ZEND_GCC_VERSION 0 329#endif 330#if defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(i386) 331# define ZEND_VM_FP_GLOBAL_REG "%esi" 332# define ZEND_VM_IP_GLOBAL_REG "%edi" 333#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__x86_64__) 334# define ZEND_VM_FP_GLOBAL_REG "%r14" 335# define ZEND_VM_IP_GLOBAL_REG "%r15" 336#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__powerpc64__) 337# define ZEND_VM_FP_GLOBAL_REG "r28" 338# define ZEND_VM_IP_GLOBAL_REG "r29" 339#elif defined(__IBMC__) && ZEND_GCC_VERSION >= 4002 && defined(__powerpc64__) 340# define ZEND_VM_FP_GLOBAL_REG "r28" 341# define ZEND_VM_IP_GLOBAL_REG "r29" 342#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__aarch64__) 343# define ZEND_VM_FP_GLOBAL_REG "x27" 344# define ZEND_VM_IP_GLOBAL_REG "x28" 345#else 346# error "global register variables are not supported" 347#endif 348typedef int (*opcode_handler_t)(void); 349register void *FP __asm__(ZEND_VM_FP_GLOBAL_REG); 350register const opcode_handler_t *IP __asm__(ZEND_VM_IP_GLOBAL_REG); 351int emu(const opcode_handler_t *ip, void *fp) { 352 const opcode_handler_t *orig_ip = IP; 353 void *orig_fp = FP; 354 IP = ip; 355 FP = fp; 356 while ((*ip)()); 357 FP = orig_fp; 358 IP = orig_ip; 359} 360 ]], [[ 361 ]])], [ 362 ZEND_GCC_GLOBAL_REGS=yes 363 ], [ 364 ZEND_GCC_GLOBAL_REGS=no 365 ]) 366fi 367if test "$ZEND_GCC_GLOBAL_REGS" = "yes"; then 368 AC_DEFINE([HAVE_GCC_GLOBAL_REGS], 1, [Define if the target system has support for global register variables]) 369else 370 HAVE_GCC_GLOBAL_REGS=no 371fi 372AC_MSG_RESULT($ZEND_GCC_GLOBAL_REGS) 373 374dnl Check whether __cpuid_count is available. 375AC_CACHE_CHECK(whether __cpuid_count is available, ac_cv_cpuid_count_available, [ 376AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 377 #include <cpuid.h> 378]], [[ 379 unsigned eax, ebx, ecx, edx; 380 __cpuid_count(0, 0, eax, ebx, ecx, edx); 381]])], [ 382 ac_cv_cpuid_count_available=yes 383], [ 384 ac_cv_cpuid_count_available=no 385])]) 386if test "$ac_cv_cpuid_count_available" = "yes"; then 387 AC_DEFINE([HAVE_CPUID_COUNT], 1, [whether __cpuid_count is available]) 388fi 389