Request for help to make mariadb-10.3 in Debian reproducible

[Chris Lamb]

Dear Otto,

> Or some docs on how exactly reprotest changes the build paths?

I not a reprotest user myself but this will not be anything less
convoluted than simply choosing a different directory to build from
each time, eg. /home/otto/1st-build vs. /home/otto/2nd-build.

> Do you have any pointers what in the mroonga or tokudb source I should
> search for that is related to build paths?

I have no generalised advice to impart but I spent a little while on this today and managed to make src:mroonga almost reproducible using the following changes.

Firstly, I needed to prevent the ./configure options ending up in the
binary for some kind of "--show-config" switch. This embedded the
absolute build path; the CFLAGS contain -ffile-prefix-map with a value
with the absolute build dir:

    --- a/configure.ac
    +++ b/configure.ac
    @@ -1539,7 +1539,7 @@ GRN_DEFS="$GRN_DEFS -DGRN_DEFAULT_DOCUME
     GRN_DEFS="$GRN_DEFS -DGRN_DEFAULT_RELATIVE_DOCUMENT_ROOT=\\\"\"\$(GRN_DEFAULT_RELATIVE_DOCUMENT_ROOT)\"\\\""
     AC_SUBST(GRN_DEFS)
     CFLAGS="$CFLAGS $OPT_CFLAGS "
    -AC_DEFINE_UNQUOTED(CONFIGURE_OPTIONS, "$ac_configure_args", "specified configure options")
    +AC_DEFINE_UNQUOTED(CONFIGURE_OPTIONS, "$(echo $ac_configure_args | sed -e "s@$(pwd)@<builddir>@g")", "specified configure options")
     
     # For groonga.org
     AC_ARG_WITH(groonga-org-path,

§

Secondly, I needed to adjust the embedded version of nginx (!) to not
also embed -ffile-prefix-map/CFLAGS as above. Note the use of
$(dirname $(dirname …)) as it is the top-level build directory that
was being embedded, not the current working directory at the time this
code is being run:
     
    --- a/vendor/nginx-1.17.7/auto/configure
    +++ b/vendor/nginx-1.17.7/auto/configure
    @@ -16,7 +16,7 @@ test -d $NGX_OBJS || mkdir -p $NGX_OBJS
     echo > $NGX_AUTO_HEADERS_H
     echo > $NGX_AUTOCONF_ERR
     
    -echo "#define NGX_CONFIGURE \"$NGX_CONFIGURE\"" > $NGX_AUTO_CONFIG_H
    +echo "#define NGX_CONFIGURE \"$(echo $NGX_CONFIGURE | sed -e "s@$(dirname $(dirname $(pwd)))@<builddir>@g")\"" > $NGX_AUTO_CONFIG_H

§

However, this is not complete as the ngx_http_groonga_module.o module
includes an absolute path to its .c source file. I cannot seem to find
how (it's not a -DFOO=BAR style assignment or __FILE__ usage or …)
despite poking for a little while.

Hope this gives you somewhere to start from — good luck. :)


Best wishes,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org 🍥 chris-lamb.co.uk
       `-