mkvtoolnix/ac/pugixml.m4

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dnl
dnl Check for pugixml
dnl
AC_LANG_PUSH(C++)
AC_CHECK_HEADERS([pugixml.hpp])
if test x"$ac_cv_header_pugixml_hpp" = xyes; then
AC_CHECK_LIB([pugixml], [main])
fi
AC_LANG_POP
if test x"$ac_cv_header_pugixml_hpp" = xyes -a x"$ac_cv_lib_pugixml_main" = xyes ; then
AC_MSG_NOTICE([Using the system version of the pugixml library])
PUGIXML_INTERNAL=no
else
AC_MSG_NOTICE([Using the internal version of the pugixml library])
PUGIXML_INTERNAL=yes
fi
AC_SUBST(PUGIXML_INTERNAL)