dnl By default we'll compile and link against the bundled PCRE library. If
dnl --with-external-pcre is supplied, we'll use that for linking.
PHP_ARG_WITH([external-pcre],,
  [AS_HELP_STRING([--with-external-pcre],
    [Use external library for PCRE support])],
  [no],
  [no])

PHP_ARG_WITH([pcre-jit],,
  [AS_HELP_STRING([--without-pcre-jit],
    [Disable PCRE JIT functionality])],
  [yes],
  [no])

if test "$PHP_EXTERNAL_PCRE" != "no"; then

  PKG_CHECK_MODULES([PCRE2], [libpcre2-8 >= 10.30])

  PHP_EVAL_INCLINE($PCRE2_CFLAGS)
  PHP_EVAL_LIBLINE($PCRE2_LIBS)
  AC_DEFINE(PCRE2_CODE_UNIT_WIDTH, 8, [ ])

  if test "$PHP_PCRE_JIT" != "no"; then
    AC_CACHE_CHECK([for JIT support in PCRE2], ac_cv_have_pcre2_jit, [
      AC_RUN_IFELSE([
          AC_LANG_SOURCE([[
              #include <pcre2.h>
              #include <stdlib.h>
              int main(void) {
                uint32_t have_jit;
                pcre2_config_8(PCRE2_CONFIG_JIT, &have_jit);
                return !have_jit;
              }
          ]])], [
          ac_cv_have_pcre2_jit=yes
        ],
        [
          ac_cv_have_pcre2_jit=no
        ],
        [
          AC_CANONICAL_HOST
          case $host_cpu in
          arm*|i[[34567]]86|x86_64|mips*|powerpc*|sparc)
            ac_cv_have_pcre2_jit=yes
            ;;
          *)
            ac_cv_have_pcre2_jit=no
            ;;
          esac
        ])
      ])
      if test $ac_cv_have_pcre2_jit = yes; then
        AC_DEFINE(HAVE_PCRE_JIT_SUPPORT, 1, [])
      fi
  fi

  PHP_NEW_EXTENSION(pcre, php_pcre.c, no,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
  PHP_INSTALL_HEADERS([ext/pcre], [php_pcre.h])
else
  AC_MSG_CHECKING([for PCRE library to use])
  AC_MSG_RESULT([bundled])
  pcrelib_sources="pcre2lib/pcre2_auto_possess.c pcre2lib/pcre2_chartables.c pcre2lib/pcre2_compile.c \
      pcre2lib/pcre2_config.c pcre2lib/pcre2_context.c pcre2lib/pcre2_dfa_match.c pcre2lib/pcre2_error.c \
  pcre2lib/pcre2_jit_compile.c pcre2lib/pcre2_maketables.c pcre2lib/pcre2_match.c pcre2lib/pcre2_match_data.c \
  pcre2lib/pcre2_newline.c pcre2lib/pcre2_ord2utf.c pcre2lib/pcre2_pattern_info.c pcre2lib/pcre2_serialize.c \
  pcre2lib/pcre2_string_utils.c pcre2lib/pcre2_study.c pcre2lib/pcre2_substitute.c  pcre2lib/pcre2_substring.c \
  pcre2lib/pcre2_tables.c pcre2lib/pcre2_ucd.c pcre2lib/pcre2_valid_utf.c pcre2lib/pcre2_xclass.c \
  pcre2lib/pcre2_find_bracket.c pcre2lib/pcre2_convert.c pcre2lib/pcre2_extuni.c pcre2lib/pcre2_script_run.c"
  PHP_PCRE_CFLAGS="-Wno-implicit-fallthrough -DHAVE_CONFIG_H -I@ext_srcdir@/pcre2lib -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1"
  AC_DEFINE(HAVE_BUNDLED_PCRE, 1, [ ])
  AC_DEFINE(PCRE2_CODE_UNIT_WIDTH, 8, [ ])

  AC_MSG_CHECKING([whether to enable PCRE JIT functionality])
  if test "$PHP_PCRE_JIT" != "no"; then
    AC_DEFINE(HAVE_PCRE_JIT_SUPPORT, 1, [ ])
    AC_MSG_RESULT([yes])

    AC_CACHE_CHECK([whether Intel CET is enabled], ac_cv_have_pcre2_intel_cet, [
      AC_COMPILE_IFELSE([
        AC_LANG_SOURCE([[
          #ifndef __CET__
          # error CET is not enabled
          #endif
        ]])], [
          ac_cv_have_pcre2_intel_cet=yes
        ], [
          ac_cv_have_pcre2_intel_cet=no
        ])
      if test "$ac_cv_have_pcre2_intel_cet" = yes; then
        PHP_PCRE_CFLAGS="-mshstk $PHP_PCRE_CFLAGS"
      fi
    ])

  else
    AC_MSG_RESULT([no])
  fi

  PHP_NEW_EXTENSION(pcre, $pcrelib_sources php_pcre.c, no,,$PHP_PCRE_CFLAGS)
  PHP_ADD_BUILD_DIR($ext_builddir/pcre2lib)
  PHP_INSTALL_HEADERS([ext/pcre], [php_pcre.h pcre2lib/])

  if test "$PHP_VALGRIND" != "no" && test "$have_valgrind" = "yes"; then
      dnl Enable pcre valgrind support only in DEBUG build (it affects performance)
      if test "$ZEND_DEBUG" = "yes"; then
        AC_DEFINE(HAVE_PCRE_VALGRIND_SUPPORT, 1, [ ])
      fi
  fi
fi