devel/freebsd-gcc9 at powerpc (for example) : it has the clang vs. gcc vec_step name conflict (for powerpc families): build fails under clang

[Mark Millard]

I tried to build devel/freebsd-gcc9 at powerpc on a powerpc64 (in an
ELFv1 clang environment) and it reported (listing just one of the
examples that pointed to vec_step):


/wrkdirs/usr/ports/devel/freebsd-gcc9/work-powerpc/gcc-9.2.0/gcc/tree-vect-loop.c:4595:12: error: expected unqualified-id
      tree vec_step = build_vector_from_val (cr_index_vector_type, step);
           ^

(Unsure if white handling will still end up with ^
pointing to vec_step.)

clang reserves a name that the gcc source code uses:
vec_step . (I'll not get into the long, messy history
of this name and multiple standards built on top of
C/C++, not necessarily in a language appropriate
way.)

It turns out that:

# ls -laT /usr/ports/devel/freebsd-gcc9/files/
total 44
drwxr-xr-x  2 root  wheel    512 Dec 25 19:25:26 2019 .
drwxr-xr-x  3 root  wheel    512 Dec 25 19:25:26 2019 ..
-rw-r--r--  1 root  wheel   4781 Dec 25 19:25:26 2019 patch-freebsd-format-extensions
-rw-r--r--  1 root  wheel   1413 Dec 25 19:25:26 2019 patch-freebsd-libdir
-rw-r--r--  1 root  wheel    588 Dec 25 19:25:26 2019 patch-gcc-configure
-rw-r--r--  1 root  wheel  16346 Dec 25 19:25:26 2019 patch-gcc-freebsd-mips
-rw-r--r--  1 root  wheel    231 Dec 25 19:25:26 2019 xtoolchain.mk.in

is missing the patch-clang-vec_step that is in:

FBSDG5L2# ls -laT /usr/ports/lang/gcc9/files/
total 32
drwxr-xr-x  2 root  wheel   512 Dec 25 20:57:52 2019 .
drwxr-xr-x  3 root  wheel   512 Dec 25 21:07:33 2019 ..
-rw-r--r--  1 root  wheel  3450 Jun  1 18:44:50 2019 patch-arm-unwind-cxx-support
-rw-r--r--  1 root  wheel   651 Sep 18 11:08:37 2019 patch-clang-vec_step
-rw-r--r--  1 root  wheel  2148 Jun  1 18:44:50 2019 patch-gets-no-more
-rw-r--r--  1 root  wheel  2897 Jun  1 18:44:50 2019 patch-gfortran-libgcc
-rw-r--r--  1 root  wheel   932 Dec 25 19:25:10 2019 patch-powerpc32
-rw-r--r--  1 root  wheel   294 Sep 15 13:10:46 2019 pkg-message.in

I do not know if other differences in the patch
lists might be important to other aspects (in
either direction).

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)