Add installation support for SUSE 16

[jordancarlin]

openSUSE 16 was released today. The installation scripts need to be updated accordingly and it should be added to the installation CI.

[jordancarlin]

Unfortunately, it seems like this will be nontrivial. I tried just updating the version checks and a few package versions like is usually needed for a new distro release, but buildroot fails to compile:

...
In file included from gl_avltree_oset.h:21,
                 from gl_avltree_oset.c:21:
gl_oset.h:275:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  275 | GL_OSET_INLINE _GL_ATTRIBUTE_NODISCARD int
      | ^~~~~~~~~~~~~~
gl_oset.h:275:40: error: expected identifier or '(' before 'int'
  275 | GL_OSET_INLINE _GL_ATTRIBUTE_NODISCARD int
      |                                        ^~~
In file included from clean-temp-private.h:22,
                 from clean-temp-simple.c:22:
gl_list.h:633:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  633 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD int
      | ^~~~~~~~~~~~~~
gl_list.h:633:40: error: expected identifier or '(' before 'int'
  633 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD int
      |                                        ^~~
gl_list.h:688:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  688 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:688:40: error: expected identifier or '(' before 'gl_list_node_t'
  688 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:695:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  695 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:695:40: error: expected identifier or '(' before 'gl_list_node_t'
  695 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:701:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  701 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:701:40: error: expected identifier or '(' before 'gl_list_node_t'
  701 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:755:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  755 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:755:40: error: expected identifier or '(' before 'gl_list_node_t'
  755 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:762:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  762 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:762:40: error: expected identifier or '(' before 'gl_list_node_t'
  762 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:769:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  769 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:769:40: error: expected identifier or '(' before 'gl_list_node_t'
  769 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:776:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  776 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:776:40: error: expected identifier or '(' before 'gl_list_node_t'
  776 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:783:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  783 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:783:40: error: expected identifier or '(' before 'gl_list_node_t'
  783 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:894:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  894 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:894:40: error: expected identifier or '(' before 'gl_list_node_t'
  894 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
  CC       dirname-lgpl.o
make[5]: *** [Makefile:2871: gl_avltree_oset.o] Error 1
make[5]: *** Waiting for unfinished jobs....
In file included from clean-temp-private.h:22,
                 from clean-temp.c:39:
gl_list.h:633:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  633 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD int
      | ^~~~~~~~~~~~~~
gl_list.h:633:40: error: expected identifier or '(' before 'int'
  633 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD int
      |                                        ^~~
gl_list.h:688:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  688 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:688:40: error: expected identifier or '(' before 'gl_list_node_t'
  688 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:695:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  695 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:695:40: error: expected identifier or '(' before 'gl_list_node_t'
  695 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:701:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  701 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:701:40: error: expected identifier or '(' before 'gl_list_node_t'
  701 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:755:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  755 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:755:40: error: expected identifier or '(' before 'gl_list_node_t'
  755 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:762:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  762 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:762:40: error: expected identifier or '(' before 'gl_list_node_t'
  762 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:769:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  769 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:769:40: error: expected identifier or '(' before 'gl_list_node_t'
  769 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:776:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  776 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:776:40: error: expected identifier or '(' before 'gl_list_node_t'
  776 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:783:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  783 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:783:40: error: expected identifier or '(' before 'gl_list_node_t'
  783 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:894:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  894 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:894:40: error: expected identifier or '(' before 'gl_list_node_t'
  894 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
In file included from file-set.h:23,
                 from canonicalize.c:34:
hash.h:180:8: warning: 'nodiscard' attribute ignored [-Wattributes]
  180 |        _GL_ATTRIBUTE_NODISCARD;
      |        ^~~~~~~~~~~~~~~~~~~~~~~
hash.h:189:8: warning: 'nodiscard' attribute ignored [-Wattributes]
  189 |        _GL_ATTRIBUTE_NODISCARD;
      |        ^~~~~~~~~~~~~~~~~~~~~~~
hash.h:214:8: warning: 'nodiscard' attribute ignored [-Wattributes]
  214 |        _GL_ATTRIBUTE_NODISCARD;
      |        ^~~~~~~~~~~~~~~~~~~~~~~
hash.h:222:8: warning: 'nodiscard' attribute ignored [-Wattributes]
  222 |        _GL_ATTRIBUTE_NODISCARD;
      |        ^~~~~~~~~~~~~~~~~~~~~~~
hash.h:255:8: warning: 'deprecated' attribute ignored [-Wattributes]
  255 |        _GL_ATTRIBUTE_DEPRECATED;
      |        ^~~~~~~~~~~~~~~~~~~~~~~~
canonicalize.c: In function 'canonicalize_filename_mode':
canonicalize.c:484:5: warning: #warning "GCC might issue a bogus -Wreturn-local-addr warning here." [-Wcpp]
  484 |    #warning "GCC might issue a bogus -Wreturn-local-addr warning here."
      |     ^~~~~~~
canonicalize.c:485:5: warning: #warning "See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644>." [-Wcpp]
  485 |    #warning "See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644>."
      |     ^~~~~~~
In file included from clean-temp.c:49:
gl_xlist.h: In function 'gl_list_node_set_value':
gl_xlist.h:104:16: error: implicit declaration of function 'gl_list_node_nx_set_value'; did you mean 'gl_list_node_set_value'? [-Wimplicit-function-declaration]
  104 |   int result = gl_list_node_nx_set_value (list, node, elt);
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~
      |                gl_list_node_set_value
gl_xlist.h: In function 'gl_list_set_at':
gl_xlist.h:112:27: error: implicit declaration of function 'gl_list_nx_set_at'; did you mean 'gl_list_set_at'? [-Wimplicit-function-declaration]
  112 |   gl_list_node_t result = gl_list_nx_set_at (list, position, elt);
      |                           ^~~~~~~~~~~~~~~~~
      |                           gl_list_set_at
gl_xlist.h:112:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
clean-temp-simple.c: In function 'register_temporary_file':
clean-temp-simple.c:348:11: error: implicit declaration of function 'gl_list_nx_add_first'; did you mean 'gl_list_remove_first'? [-Wimplicit-function-declaration]
  348 |       if (gl_list_nx_add_first (file_cleanup_list, absolute_file_name_copy)
      |           ^~~~~~~~~~~~~~~~~~~~
      |           gl_list_remove_first
clean-temp-simple.c:349:11: warning: comparison between pointer and integer
  349 |           == NULL)
      |           ^~
gl_xlist.h: In function 'gl_list_set_first':
gl_xlist.h:121:27: error: implicit declaration of function 'gl_list_nx_set_first'; did you mean 'gl_list_set_first'? [-Wimplicit-function-declaration]
  121 |   gl_list_node_t result = gl_list_nx_set_first (list, elt);
      |                           ^~~~~~~~~~~~~~~~~~~~
      |                           gl_list_set_first
gl_xlist.h:121:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
gl_xlist.h: In function 'gl_list_set_last':
gl_xlist.h:130:27: error: implicit declaration of function 'gl_list_nx_set_last'; did you mean 'gl_list_set_last'? [-Wimplicit-function-declaration]
  130 |   gl_list_node_t result = gl_list_nx_set_last (list, elt);
      |                           ^~~~~~~~~~~~~~~~~~~
      |                           gl_list_set_last
gl_xlist.h:130:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
gl_xlist.h: In function 'gl_list_add_first':
gl_xlist.h:139:27: error: implicit declaration of function 'gl_list_nx_add_first'; did you mean 'gl_list_add_first'? [-Wimplicit-function-declaration]
  139 |   gl_list_node_t result = gl_list_nx_add_first (list, elt);
      |                           ^~~~~~~~~~~~~~~~~~~~
      |                           gl_list_add_first
gl_xlist.h:139:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
gl_xlist.h: In function 'gl_list_add_last':
gl_xlist.h:148:27: error: implicit declaration of function 'gl_list_nx_add_last'; did you mean 'gl_list_add_last'? [-Wimplicit-function-declaration]
  148 |   gl_list_node_t result = gl_list_nx_add_last (list, elt);
      |                           ^~~~~~~~~~~~~~~~~~~
      |                           gl_list_add_last
gl_xlist.h:148:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
make[5]: *** [Makefile:2871: clean-temp-simple.o] Error 1
gl_xlist.h: In function 'gl_list_add_before':
gl_xlist.h:157:27: error: implicit declaration of function 'gl_list_nx_add_before'; did you mean 'gl_list_add_before'? [-Wimplicit-function-declaration]
  157 |   gl_list_node_t result = gl_list_nx_add_before (list, node, elt);
      |                           ^~~~~~~~~~~~~~~~~~~~~
      |                           gl_list_add_before
gl_xlist.h:157:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
gl_xlist.h: In function 'gl_list_add_after':
gl_xlist.h:166:27: error: implicit declaration of function 'gl_list_nx_add_after'; did you mean 'gl_list_add_after'? [-Wimplicit-function-declaration]
  166 |   gl_list_node_t result = gl_list_nx_add_after (list, node, elt);
      |                           ^~~~~~~~~~~~~~~~~~~~
      |                           gl_list_add_after
gl_xlist.h:166:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
gl_xlist.h: In function 'gl_list_add_at':
gl_xlist.h:175:27: error: implicit declaration of function 'gl_list_nx_add_at'; did you mean 'gl_list_add_at'? [-Wimplicit-function-declaration]
  175 |   gl_list_node_t result = gl_list_nx_add_at (list, position, elt);
      |                           ^~~~~~~~~~~~~~~~~
      |                           gl_list_add_at
gl_xlist.h:175:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
gl_xlist.h: In function 'gl_sortedlist_add':
gl_xlist.h:185:27: error: implicit declaration of function 'gl_sortedlist_nx_add'; did you mean 'gl_sortedlist_add'? [-Wimplicit-function-declaration]
  185 |   gl_list_node_t result = gl_sortedlist_nx_add (list, compar, elt);
      |                           ^~~~~~~~~~~~~~~~~~~~
      |                           gl_sortedlist_add
gl_xlist.h:185:27: error: initialization of 'gl_list_node_t' {aka 'struct gl_list_node_impl *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
make[5]: *** [Makefile:2871: clean-temp.o] Error 1
make[5]: Leaving directory '/root/cvw/linux/buildroot/output/build/host-m4-1.4.19/lib'
make[4]: *** [Makefile:2481: all] Error 2
make[4]: Leaving directory '/root/cvw/linux/buildroot/output/build/host-m4-1.4.19/lib'
make[3]: *** [Makefile:2018: all-recursive] Error 1
make[3]: Leaving directory '/root/cvw/linux/buildroot/output/build/host-m4-1.4.19'
make[2]: *** [Makefile:1974: all] Error 2
make[2]: Leaving directory '/root/cvw/linux/buildroot/output/build/host-m4-1.4.19'
make[1]: *** [package/pkg-generic.mk:289: /root/cvw/linux/buildroot/output/build/host-m4-1.4.19/.stamp_built] Error 2
make[1]: Leaving directory '/root/cvw/linux/buildroot'
make: *** [Makefile:56: buildroot/output/images/Image] Error 2

[jordancarlin]

Seems like this is a known issue with the newer system compiler on SUSE 16.0 (gcc 15). We need to update to a newer version of buildroot.

[davidharrishmc]

I don’t want to touch buildroot in Wally. That affects the textbook. Can we either indicate that we’re incompatible with SUSE 16 or install an older gcc for backward compatibility?

…

On Oct 5, 2025, at 2:00 AM, Jordan Carlin ***@***.***> wrote: jordancarlin left a comment (openhwgroup/cvw#1524) <#1524 (comment)> Seems like this is a known issue with the newer system compiler on SUSE 16.0 (gcc 15). We need to update to a newer version of buildroot. — Reply to this email directly, view it on GitHub <#1524 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AR4AA37JLNQ7EK2I6FKPDFL3WDM4XAVCNFSM6AAAAACIARPZGGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTGNRYHA3TQMZWHA>. You are receiving this because you are subscribed to this thread.

[jordancarlin]

Unfortunately, I think we might need to consider updating Buildroot because SUSE 16 is not going to be the only distro that gives us trouble. The next LTS release of Ubuntu has GCC 15 as its default as well, and it is likely that many users of the book will be running Ubuntu 26.04 because it will be the latest Ubuntu release right around when the textbook is published.

[davidharrishmc]

Ok. Can we add a sentence to the Linux chapter about the reason for change and how it affects the chapter?

…

On Thu, Nov 6, 2025 at 11:55 PM Jordan Carlin ***@***.***> wrote: *jordancarlin* left a comment (openhwgroup/cvw#1524) <#1524 (comment)> Unfortunately, I think we might need to consider updating Buildroot because SUSE 16 is not going to be the only distro that gives us trouble. The next LTS release of Ubuntu has GCC 15 as its default as well, and it is likely that many users of the book will be running Ubuntu 26.04 because it will be the latest Ubuntu release right around when the textbook is published. — Reply to this email directly, view it on GitHub <#1524 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AR4AA32A6B2W6FUGDL3IYU333RFSXAVCNFSM6AAAAACIARPZGGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTKMBRGE2TQNRWGA> . You are receiving this because you commented.Message ID: ***@***.***>