https://bugzilla.redhat.com/show_bug.cgi?id=2008090
--- Comment #7 from Andreas Krebbel <krebbel1(a)de.ibm.com> ---
(In reply to Dan Horák from comment #5)
I think the passing of -march=z14 will need some thinking, because I
see 2
kinds of gcc command lines
gcc -O3 -march=z14 -mzvector -Wall -std=gnu99 -fstack-protector-all -O2
-flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe
-Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
-Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1
-fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64
-march=zEC12 -mtune=z13 -fasynchronous-unwind-tables
-fstack-clash-protection -march=z14 -funroll-loops "-Wall" -I ../zdnn -I .
-fPIC -c init_ztensor.c -o obj/init_ztensor.o
and
gcc -O3 -mzvector -Wall -std=gnu99 -fstack-protector-all -O2 -flto=auto
-ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall
-Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=zEC12 -mtune=z13
-fasynchronous-unwind-tables -fstack-clash-protection -march=z14 "-Wall"
-fPIC -c zdnn_init.c -o obj/zdnn_init.o
The first one has -march=z14 twice, the second has one occurrence. The
"appended" -march overrides the distro wide flags, which is OK in the first
case, I think, but not in the second ...
Good catch. The second must not have an -march=z14. I've added a patch to the
srpm and pass CFLAGS_INIT to configure as well now. There I do not append
-march=z14. The build command lines look ok with that change. Thanks!
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https://bugzilla.redhat.com/show_bug.cgi?id=2008090