@@ -40,10 +40,14 @@ dnl Check for the ability to get the current system encoding AC_CHECK_FUNCS(Tcl_GetEncodingNameFromEnvironment Tcl_SetSystemEncoding) LIBS="${SAVE_LIBS}" +dnl Check for optional headers +AC_HEADER_STDC +AC_CHECK_HEADERS(unistd.h dlfcn.h) + dnl Check for optional system calls -AC_CHECK_FUNCS(readlink) +AC_CHECK_FUNCS(readlink dladdr) dnl Find zlib AC_ARG_WITH(zlib, AC_HELP_STRING([--with-zlib], [directory containing zlib]), [ CPPFLAGS="${CPPFLAGS} -I${with_zlib}/include -I${with_zlib}"