bug#37499: Wrong location of deps directory when using AC_SUBST

[Karl Berry]

Hi Fabrizio - sorry for the absurdly delayed reply.
Also sorry, but I don't exactly understand.

    dnl Use absolute path of lib
    MYLIB_PATH=`readlink -f ${MYLIB_PATH}`
    ...
    testApp_SOURCES = main.c @MYLIB_PATH@/mylib_log.c
    testApp_CFLAGS = -I@MYLIB_PATH@/lib
    ...
    After running configure, I get the .deps directory created here:
    
/home/fabrizio/test/autotool-issue/proj/src/home/fabrizio/test/autotool-issue/lib/.deps/testApp-mylib_log.Po

Are you saying an older version used to not insert the full directory
path when making the .deps? So that it ended up being (I guess):
/home/fabrizio/test/autotool-issue/proj/src/lib/.deps/testApp-mylib_log.Po
Do you know what version worked?

If it worked with an older version and doesn't work now, I could try to
look. Otherwise it is hard to guess what could have changed. My first
reaction is that automake is just using the path it's given; I wouldn't
expect it to the relativization itself? I suspect I'm misunderstanding
something.

    I have a full reproducible project I could attach. Just let me know.

For sure a reproducible case would be helpful in understanding. The
smaller the better.

Thanks,
Karl