Writing a PHP Extension

The config.m4 file adds any extension-specific configuration options. If your extension relies on external libraries and header files, you need to define those in this file and uncomment the --with-tidy section. If your extension does not rely on any external libraries, uncomment the --enable-tidy section.

dnl config.m4 for extension tidy

PHP_ARG_WITH(tidy, for tidy support,
[  --with-tidy             Include tidy support])

if test "$PHP_TIDY" != "no"; then
  # --with-tidy -> check with-path
  SEARCH_PATH="/usr/local /usr"
  SEARCH_FOR="/include/tidy/tidy.h" 
  if test -r $PHP_TIDY/; then # path given as parameter
    TIDY_DIR=$PHP_TIDY
  else # search default path list
    AC_MSG_CHECKING([for tidy files in default path])
    for i in $SEARCH_PATH ; do
      if test -r $i/$SEARCH_FOR; then
        TIDY_DIR=$i
        AC_MSG_RESULT(found in $i)
      fi
    done
  fi
  dnl
  if test -z "$TIDY_DIR"; then
    AC_MSG_RESULT([not found])
    AC_MSG_ERROR([Please reinstall the tidy distribution])
  fi

  # --with-tidy -> add include path
  PHP_ADD_INCLUDE($TIDY_DIR/include)

  # --with-tidy -> check for lib and symbol presence
  LIBNAME=tidy # you may want to change this
  LIBSYMBOL=tidyReleaseDate # you most likely want to change this 

  PHP_CHECK_LIBRARY($LIBNAME,$LIBSYMBOL,
  [
    PHP_ADD_LIBRARY_WITH_PATH($LIBNAME, $TIDY_DIR/lib, TIDY_SHARED_LIBADD)
    AC_DEFINE(HAVE_TIDYLIB,1,[ ])
  ],[
    AC_MSG_ERROR([wrong tidy lib version or lib not found])
  ],[
    -L$TIDY_DIR/lib -lm -ldl
  ])
  dnl
  PHP_SUBST(TIDY_SHARED_LIBADD)

  PHP_EXTENSION(tidy, $ext_shared)
dnl PHP_NEW_EXTENSION(tidy, tidy.c, $ext_shared)
fi