Hi!

On 2022-10-10T16:31:26+0100, Gaius Mulley via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
> Here are the dejagnu expect library scripts for the gm2
> testsuite.

This (or some variant thereof; haven't checked), became part of
commit r13-4704-g1eee94d351774cdc2efc8ee508b82d065184c6ee
"Merge modula-2 front end onto gcc".


For build-tree testing ('$gccpath != ""'; such as standard 'make check'),
'gm2_link_flags' takes care to set up paths to a number of libraries that
may be necessary:

> --- /dev/null 2022-08-24 16:22:16.888000070 +0100
> +++ gcc-git-devel-modula2/gcc/testsuite/lib/gm2.exp   2022-10-07 20:21:18.718097775 +0100

> +set gm2_link_libraries "m2pim m2iso";

> +#  gm2_link_flags - detects the whereabouts of libraries (-lstdc++).
> +#
> +
> +proc gm2_link_flags { paths } {
> +    global srcdir;
> +    global ld_library_path;
> +    global gccpath;
> +    global gm2_link_libraries;
> +
> +    set gccpath ${paths}
> +    set libio_dir ""
> +    set flags ""
> +    set ld_library_path "."
> +
> +    set shlib_ext [get_shlib_extension]
> +    verbose "shared lib extension: $shlib_ext"
> +
> +    if { $gccpath == "" } {
> +      global tool_root_dir
> +
> +      set libstdcpp [lookfor_file ${tool_root_dir} libstdc++]
> +      if { $libstdcpp != "" } {
> +          append flags "-L${libstdcpp} "
> +          append ld_library_path ":${libstdcpp}"
> +      }
> +    } else {
> +     if [file exists "${gccpath}/lib/libstdc++.a"] {
> +         append ld_library_path ":${gccpath}/lib"
> +     }
> +     if [file exists "${gccpath}/libstdc++/libstdc++.a"] {
> +         append flags "-L${gccpath}/libstdc++ "
> +         append ld_library_path ":${gccpath}/libstdc++"
> +     }
> +     if [file exists "${gccpath}/libstdc++-v3/src/.libs/libstdc++.a"] {
> +         append flags " -L${gccpath}/libstdc++-v3/src/.libs "
> +         append ld_library_path ":${gccpath}/libstdc++-v3/src/.libs"
> +     }
> +     # Look for libstdc++.${shlib_ext}.
> +     if [file exists "${gccpath}/libstdc++-v3/src/.libs/libstdc++.${shlib_ext}"] {
> +         append flags " -L${gccpath}/libstdc++-v3/src/.libs "
> +         append ld_library_path ":${gccpath}/libstdc++-v3/src/.libs"
> +     }
> +
> +     # puts stderr "${gm2_link_libraries}  before foreach"
> +     foreach d [list {*}${gm2_link_libraries}] {
> +         # puts stderr "${d}  XXXX"
> +         send_log "ld_library_path was ${ld_library_path}\n"
> +         send_log "looking for ${gccpath}/lib${d}/.libs/lib${d}.a\n"
> +         if [file exists "${gccpath}/libgm2/lib${d}/.libs/lib${d}.a"] {
> +             send_log "good found ${gccpath}/libgm2/lib${d}/.libs/lib${d}.a\n"
> +             # append flags " -L${gccpath}/libgm2/lib${d}/.libs -l${d}"
> +             append flags " ${gccpath}/libgm2/lib${d}/.libs/lib${d}.a"
> +             append ld_library_path ":${gccpath}/libgm2/lib${d}/.libs"
> +         }
> +         send_log "ld_library_path is ${ld_library_path}\n"
> +     }
> +    }
> +
> +    set_ld_library_path_env_vars
> +    return "$flags"
> +}

However, this misses compiler libraries (such as libgcc, which libstdc++
may depend on).  For example, I see my x86_64-pc-linux-gnu '-m32' testing
not pick up the build-tree libgcc, but instead some random system one,
which (expectedly) doesn't satisfy requirements of other build-tree
libraries:

    [...]/build-gcc/gcc/testsuite/gm225/m.x0: /lib/i386-linux-gnu/libgcc_s.so.1: version `GCC_7.0.0' not found (required by [...]/build-gcc/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so.6)

..., and thus a lot of execution FAILs.

To cure that, OK to push the attached
"For Modula-2 build-tree testing, also set up paths to compiler libraries"?


Grüße
 Thomas


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