so, it detected header but cppflags/cflags still not updated. <div><br></div><div>I found gl_ABSOLUTE_HEADER macro from gnulib/m4 but it only adds &#39;-D PATH_TO_HEADER=///path_to_header&#39; gcc flags and PATH_TO_HEADER define to config.h </div><div><br></div><div>I thought confuge not just find libs but alters cflags/cppflags/ldflags - but apparently our does not quite work this way.. </div><div><br></div><div>theres was AC_LIB_LINKFLAGS</div><div><a href="https://www.gnu.org/software/gnulib/manual/html_node/Searching-for-Libraries.html">https://www.gnu.org/software/gnulib/manual/html_node/Searching-for-Libraries.html</a></div><div><br></div><div>but it also assumes </div><div>&quot; These macros assume that when a library is installed in some_directory/lib, its include files are installed in some_directory/include.&quot; </div><div><br></div><div>in our case this is wrong.. </div><div><br></div><div>so I am stuck at adding one more &quot; -I&quot; directive to configure.ac... <br><br>On Friday, April 8, 2022, Andrea paz &lt;<a href="mailto:gamberucci.andrea@gmail.com">gamberucci.andrea@gmail.com</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">&gt; can you send me config.log too? (to see if configure picked up liba52/a52.h header)<br>
</blockquote></div>