php-src/Zend/Zend.m4

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dnl This file contains Zend specific autoconf macros.
dnl
dnl ZEND_CHECK_FLOAT_PRECISION
dnl
dnl x87 floating point internal precision control checks
dnl See: http://wiki.php.net/rfc/rounding
dnl
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 "$ac_cfp_have_fpu_inline_asm_x86" = "yes" ; then
AC_DEFINE(HAVE_FPU_INLINE_ASM_X86, 1, [whether FPU control word can be manipulated by inline assembler])
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
])
dnl
dnl LIBZEND_BASIC_CHECKS
dnl
dnl Basic checks specific for the Zend engine library.
dnl
AC_DEFUN([LIBZEND_BASIC_CHECKS],[
AC_REQUIRE([AC_PROG_CC])
AC_CHECK_HEADERS([cpuid.h])
dnl
dnl LIBZEND_DLSYM_CHECK
dnl
dnl Ugly hack to check if dlsym() requires a leading underscore in symbol name.
dnl
AC_DEFUN([LIBZEND_DLSYM_CHECK],[
AC_MSG_CHECKING([whether dlsym() requires a leading underscore in symbol names])
_LT_AC_TRY_DLOPEN_SELF([
AC_MSG_RESULT(no)
], [
AC_MSG_RESULT(yes)
AC_DEFINE(DLSYM_NEEDS_UNDERSCORE, 1, [Define if dlsym() requires a leading underscore in symbol names. ])
], [
AC_MSG_RESULT(no)
], [])
])
dnl Checks for library functions.
AC_CHECK_FUNCS(getpid kill sigsetjmp pthread_getattr_np pthread_attr_get_np pthread_get_stackaddr_np pthread_attr_getstack pthread_stackseg_np gettid)
dnl Test whether the stack grows downwards
dnl Assumes contiguous stack
AC_MSG_CHECKING(whether the stack grows downwards)
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdint.h>
int (*volatile f)(uintptr_t);
int stack_grows_downwards(uintptr_t arg) {
int local;
return (uintptr_t)&local < arg;
}
int main(void) {
int local;
f = stack_grows_downwards;
return f((uintptr_t)&local) ? 0 : 1;
}
]])], [
AC_DEFINE([ZEND_CHECK_STACK_LIMIT], 1, [Define if checking the stack limit is supported])
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
], [
AC_MSG_RESULT(no)
])
ZEND_CHECK_FLOAT_PRECISION
])
dnl
dnl LIBZEND_OTHER_CHECKS
dnl
AC_DEFUN([LIBZEND_OTHER_CHECKS],[
AC_MSG_CHECKING(whether to enable thread-safety)
AC_MSG_RESULT($ZEND_ZTS)
AC_MSG_CHECKING(whether to enable Zend debugging)
AC_MSG_RESULT($ZEND_DEBUG)
if test "$ZEND_DEBUG" = "yes"; then
AC_DEFINE(ZEND_DEBUG,1,[ ])
echo " $CFLAGS" | grep ' -g' >/dev/null || DEBUG_CFLAGS="-g"
if test "$CFLAGS" = "-g -O2"; then
CFLAGS=-g
fi
else
AC_DEFINE(ZEND_DEBUG,0,[ ])
fi
test -n "$GCC" && CFLAGS="-Wall -Wextra -Wno-unused-parameter -Wno-sign-compare $CFLAGS"
dnl Check if compiler supports -Wno-clobbered (only GCC)
AX_CHECK_COMPILE_FLAG([-Wno-clobbered], CFLAGS="-Wno-clobbered $CFLAGS", , [-Werror])
dnl Check for support for implicit fallthrough level 1, also add after previous CFLAGS as level 3 is enabled in -Wextra
AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough=1], CFLAGS="$CFLAGS -Wimplicit-fallthrough=1", , [-Werror])
AX_CHECK_COMPILE_FLAG([-Wduplicated-cond], CFLAGS="-Wduplicated-cond $CFLAGS", , [-Werror])
AX_CHECK_COMPILE_FLAG([-Wlogical-op], CFLAGS="-Wlogical-op $CFLAGS", , [-Werror])
AX_CHECK_COMPILE_FLAG([-Wformat-truncation], CFLAGS="-Wformat-truncation $CFLAGS", , [-Werror])
AX_CHECK_COMPILE_FLAG([-Wstrict-prototypes], CFLAGS="-Wstrict-prototypes $CFLAGS", , [-Werror])
AX_CHECK_COMPILE_FLAG([-fno-common], CFLAGS="-fno-common $CFLAGS", , [-Werror])
test -n "$DEBUG_CFLAGS" && CFLAGS="$CFLAGS $DEBUG_CFLAGS"
if test "$ZEND_ZTS" = "yes"; then
AC_DEFINE(ZTS,1,[ ])
CFLAGS="$CFLAGS -DZTS"
fi
AC_C_INLINE
AC_MSG_CHECKING(target system is Darwin)
if echo "$target" | grep "darwin" > /dev/null; then
AC_DEFINE([DARWIN], 1, [Define if the target system is darwin])
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
dnl Test and set the alignment define for ZEND_MM. This also does the
dnl logarithmic test for ZEND_MM.
AC_MSG_CHECKING(for MM alignment and log values)
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <stdlib.h>
typedef union _mm_align_test {
void *ptr;
double dbl;
long lng;
} mm_align_test;
#if (defined (__GNUC__) && __GNUC__ >= 2)
#define ZEND_MM_ALIGNMENT (__alignof__ (mm_align_test))
#else
#define ZEND_MM_ALIGNMENT (sizeof(mm_align_test))
#endif
int main(void)
{
size_t i = ZEND_MM_ALIGNMENT;
int zeros = 0;
FILE *fp;
while (i & ~0x1) {
zeros++;
i = i >> 1;
}
fp = fopen("conftest.zend", "w");
fprintf(fp, "(size_t)%zu (size_t)%d %d\n", ZEND_MM_ALIGNMENT, zeros, ZEND_MM_ALIGNMENT < 4);
fclose(fp);
return 0;
}
]])], [
LIBZEND_MM_ALIGN=`cat conftest.zend | cut -d ' ' -f 1`
LIBZEND_MM_ALIGN_LOG2=`cat conftest.zend | cut -d ' ' -f 2`
LIBZEND_MM_NEED_EIGHT_BYTE_REALIGNMENT=`cat conftest.zend | cut -d ' ' -f 3`
AC_DEFINE_UNQUOTED(ZEND_MM_ALIGNMENT, $LIBZEND_MM_ALIGN, [ ])
AC_DEFINE_UNQUOTED(ZEND_MM_ALIGNMENT_LOG2, $LIBZEND_MM_ALIGN_LOG2, [ ])
AC_DEFINE_UNQUOTED(ZEND_MM_NEED_EIGHT_BYTE_REALIGNMENT, $LIBZEND_MM_NEED_EIGHT_BYTE_REALIGNMENT, [ ])
], [], [
dnl Cross compilation needs something here.
AC_DEFINE(ZEND_MM_ALIGNMENT, 8, [ ])
AC_DEFINE(ZEND_MM_ALIGNMENT_LOG2, 3, [ ])
AC_DEFINE(ZEND_MM_NEED_EIGHT_BYTE_REALIGNMENT, 0, [ ])
])
AC_MSG_RESULT(done)
AC_CHECK_FUNCS(mremap)
AC_ARG_ENABLE([zend-signals],
[AS_HELP_STRING([--disable-zend-signals],
[whether to enable zend signal handling])],
[ZEND_SIGNALS=$enableval],
[ZEND_SIGNALS=yes])
AC_CHECK_FUNCS([sigaction], [], [
ZEND_SIGNALS=no
])
if test "$ZEND_SIGNALS" = "yes"; then
AC_DEFINE(ZEND_SIGNALS, 1, [Use zend signal handling])
CFLAGS="$CFLAGS -DZEND_SIGNALS"
fi
AC_MSG_CHECKING(whether to enable zend signal handling)
AC_MSG_RESULT($ZEND_SIGNALS)
dnl Don't enable Zend Max Execution Timers by default until PHP 8.3 to not break the ABI
AC_ARG_ENABLE([zend-max-execution-timers],
[AS_HELP_STRING([--enable-zend-max-execution-timers],
[whether to enable zend max execution timers])],
[ZEND_MAX_EXECUTION_TIMERS=$enableval],
[ZEND_MAX_EXECUTION_TIMERS=$ZEND_ZTS])
AS_CASE(["$host_alias"], [*linux*], [], [ZEND_MAX_EXECUTION_TIMERS='no'])
PHP_CHECK_FUNC(timer_create, rt)
if test "$ac_cv_func_timer_create" != "yes"; then
ZEND_MAX_EXECUTION_TIMERS='no'
fi
if test "$ZEND_MAX_EXECUTION_TIMERS" = "yes"; then
AC_DEFINE(ZEND_MAX_EXECUTION_TIMERS, 1, [Use zend max execution timers])
CFLAGS="$CFLAGS -DZEND_MAX_EXECUTION_TIMERS"
fi
AC_MSG_CHECKING(whether to enable zend max execution timers)
AC_MSG_RESULT($ZEND_MAX_EXECUTION_TIMERS)
])
AC_ARG_ENABLE([gcc-global-regs],
[AS_HELP_STRING([--disable-gcc-global-regs],
[whether to enable GCC global register variables])],
[ZEND_GCC_GLOBAL_REGS=$enableval],
[ZEND_GCC_GLOBAL_REGS=yes])
AC_MSG_CHECKING(for global register variables support)
if test "$ZEND_GCC_GLOBAL_REGS" != "no"; then
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if defined(__GNUC__)
# define ZEND_GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
#else
# define ZEND_GCC_VERSION 0
#endif
#if defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(i386)
# define ZEND_VM_FP_GLOBAL_REG "%esi"
# define ZEND_VM_IP_GLOBAL_REG "%edi"
#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__x86_64__)
# define ZEND_VM_FP_GLOBAL_REG "%r14"
# define ZEND_VM_IP_GLOBAL_REG "%r15"
#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__powerpc64__)
# define ZEND_VM_FP_GLOBAL_REG "r28"
# define ZEND_VM_IP_GLOBAL_REG "r29"
#elif defined(__IBMC__) && ZEND_GCC_VERSION >= 4002 && defined(__powerpc64__)
# define ZEND_VM_FP_GLOBAL_REG "r28"
# define ZEND_VM_IP_GLOBAL_REG "r29"
#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__aarch64__)
# define ZEND_VM_FP_GLOBAL_REG "x27"
# define ZEND_VM_IP_GLOBAL_REG "x28"
#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__riscv) && __riscv_xlen == 64
# define ZEND_VM_FP_GLOBAL_REG "x18"
# define ZEND_VM_IP_GLOBAL_REG "x19"
#else
# error "global register variables are not supported"
#endif
typedef int (*opcode_handler_t)(void);
register void *FP __asm__(ZEND_VM_FP_GLOBAL_REG);
register const opcode_handler_t *IP __asm__(ZEND_VM_IP_GLOBAL_REG);
int emu(const opcode_handler_t *ip, void *fp) {
const opcode_handler_t *orig_ip = IP;
void *orig_fp = FP;
IP = ip;
FP = fp;
while ((*ip)());
FP = orig_fp;
IP = orig_ip;
}
]], [[
]])], [
ZEND_GCC_GLOBAL_REGS=yes
], [
ZEND_GCC_GLOBAL_REGS=no
])
fi
if test "$ZEND_GCC_GLOBAL_REGS" = "yes"; then
AC_DEFINE([HAVE_GCC_GLOBAL_REGS], 1, [Define if the target system has support for global register variables])
fi
AC_MSG_RESULT($ZEND_GCC_GLOBAL_REGS)
dnl Check whether __cpuid_count is available.
AC_CACHE_CHECK(whether __cpuid_count is available, ac_cv_cpuid_count_available, [
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <cpuid.h>
]], [[
unsigned eax, ebx, ecx, edx;
__cpuid_count(0, 0, eax, ebx, ecx, edx);
]])], [
ac_cv_cpuid_count_available=yes
], [
ac_cv_cpuid_count_available=no
])])
if test "$ac_cv_cpuid_count_available" = "yes"; then
AC_DEFINE([HAVE_CPUID_COUNT], 1, [whether __cpuid_count is available])
fi