erlang-R16B-02 fails to build on secondary arches, seen on ppc and s390, but I guess aarch64 would also fail.

from s390 build.log (http://s390.koji.fedoraproject.org/koji/taskinfo?taskID=1243484):
...
gcc  -Werror=return-type   -O3 -fomit-frame-pointer -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -grecord-gcc-switches  -m31 -march=z9-109 -mtune=z10 -fno-strict-aliasing -I/builddir/build/BUILD/otp_src_R16B02/erts/s390-ibm-linux-gnu  -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -fno-tree-copyrename  -D_GNU_SOURCE -DERTS_SMP -DHAVE_CONFIG_H -Wall -Wstrict-prototypes -Wmissing-prototypes -Wdeclaration-after-statement -DUSE_THREADS -D_THREAD_SAFE -D_REENTRANT -DPOSIX_THREADS -D_POSIX_THREAD_SAFE_FUNCTIONS   -Is390-ibm-linux-gnu/opt/smp -Ibeam -Isys/unix -Isys/common -Is390-ibm-linux-gnu -Ipcre -Ihipe -I../include -I../include/s390-ibm-linux-gnu -I../include/internal -I../include/internal/s390-ibm-linux-gnu -c beam/erl_bif_info.c -o obj/s390-ibm-linux-gnu/opt/smp/erl_bif_info.o
In file included from beam/erl_bif_info.c:30:0:
beam/erl_bif_info.c: In function 'system_info_1':
beam/erl_bif_info.c:2073:10: error: 'hipe_arch_name' undeclared (first use in this function)
  BIF_RET(hipe_arch_name);
          ^
beam/bif.h:118:28: note: in definition of macro 'BIF_RET'
 #define BIF_RET(x) return (x)
                            ^
beam/erl_bif_info.c:2073:10: note: each undeclared identifier is reported only once for each function it appears in
  BIF_RET(hipe_arch_name);
          ^
beam/bif.h:118:28: note: in definition of macro 'BIF_RET'
 #define BIF_RET(x) return (x)
                            ^
make[3]: Leaving directory `/builddir/build/BUILD/otp_src_R16B02/erts/emulator'
make[3]: *** [obj/s390-ibm-linux-gnu/opt/smp/erl_bif_info.o] Error 1


from ppc build.log (http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=1483569):
...
gcc  -Werror=return-type   -O3 -fomit-frame-pointer -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches  -m32 -fno-strict-aliasing -I/builddir/build/BUILD/otp_src_R16B02/erts/powerpc-redhat-linux-gnu  -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -fno-tree-copyrename  -D_GNU_SOURCE -DERTS_SMP -DHAVE_CONFIG_H -Wall -Wstrict-prototypes -Wmissing-prototypes -Wdeclaration-after-statement -DUSE_THREADS -D_THREAD_SAFE -D_REENTRANT -DPOSIX_THREADS -D_POSIX_THREAD_SAFE_FUNCTIONS   -Ipowerpc-redhat-linux-gnu/opt/smp -Ibeam -Isys/unix -Isys/common -Ipowerpc-redhat-linux-gnu -Ipcre -Ihipe -I../include -I../include/powerpc-redhat-linux-gnu -I../include/internal -I../include/internal/powerpc-redhat-linux-gnu -c beam/erl_bif_info.c -o obj/powerpc-redhat-linux-gnu/opt/smp/erl_bif_info.o
In file included from beam/erl_bif_info.c:30:0:
beam/erl_bif_info.c: In function 'system_info_1':
hipe/hipe_ppc.h:63:24: error: 'am_powerpc' undeclared (first use in this function)
 #define hipe_arch_name am_powerpc
                        ^
beam/bif.h:118:28: note: in definition of macro 'BIF_RET'
 #define BIF_RET(x) return (x)
                            ^
beam/erl_bif_info.c:2073:10: note: in expansion of macro 'hipe_arch_name'
  BIF_RET(hipe_arch_name);
          ^
hipe/hipe_ppc.h:63:24: note: each undeclared identifier is reported only once for each function it appears in
 #define hipe_arch_name am_powerpc
                        ^
beam/bif.h:118:28: note: in definition of macro 'BIF_RET'
 #define BIF_RET(x) return (x)
                            ^
beam/erl_bif_info.c:2073:10: note: in expansion of macro 'hipe_arch_name'
  BIF_RET(hipe_arch_name);
          ^
make[3]: *** [obj/powerpc-redhat-linux-gnu/opt/smp/erl_bif_info.o] Error 1
make[3]: Leaving directory `/builddir/build/BUILD/otp_src_R16B02/erts/emulator'



Version-Release number of selected component (if applicable):
erlang-R16B-02.2.fc20


proposed solution:
diff --git a/erlang.spec b/erlang.spec
index 1d4cbfd..50bbe68 100644
--- a/erlang.spec
+++ b/erlang.spec
@@ -966,9 +966,15 @@ rm -f lib/ssl/examples/certs/etc/erlangCA/index.txt.old
 
 %build
 %ifarch sparcv9 sparc64
-CFLAGS="$RPM_OPT_FLAGS -mcpu=ultrasparc -fno-strict-aliasing" %configure --enable-shared-zlib --enable-sctp --enable-hipe
+CFLAGS="$RPM_OPT_FLAGS -mcpu=ultrasparc -fno-strict-aliasing" \
 %else
-CFLAGS="$RPM_OPT_FLAGS -fno-strict-aliasing" %configure --enable-shared-zlib --enable-sctp --enable-hipe
+CFLAGS="$RPM_OPT_FLAGS -fno-strict-aliasing" \
+%endif
+%configure --enable-shared-zlib --enable-sctp \
+%ifnarch s390 s390x ppc
+    --enable-hipe
+%else
+    %{nil}
 %endif

or maybe using %ifarch with a positive list like %{ix86} x86_64 %{arm} would be even better