https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80531
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That patch seems to help for libgomp, but unlike that case where I really don't
believe anything changes with checking vs. non-checking,
I see
make[3]: Leaving directory '/scratch/jakub/gcc/obj'
Comparing stages 2 and 3
warning: gcc/cc1obj-checksum.o differs
Bootstrap comparison failure!
gcc/function-tests.o differs
Makefile:20816: recipe for target 'compare' failed
make[2]: *** [compare] Error 1
make[2]: Leaving directory '/scratch/jakub/gcc/obj'
and that one is indeed --enable-checking related.
The problem is that all these selftest*.c and *-tests.c files are empty if
!CHECKING_P and in that case AIX has to use random seed, because there are no
global symbols. So I see between stage2 and stage3
-_GLOBAL__F_.._.._gcc_function_tests.c_DFF67DD7_0xfa437af2ab912314 T
96
+_GLOBAL__F_.._.._gcc_function_tests.c_DFF67DD7_0xf71dd65310bc49d6 T
96
difference.
Perhaps we want something like (it will help non-release checking builds too by
making the self-test objects adjacent):
--- gcc/Makefile.in.jj 2017-04-25 21:44:02.000000000 +0200
+++ gcc/Makefile.in 2017-04-27 18:32:06.661511629 +0200
@@ -1187,6 +1187,11 @@ C_COMMON_OBJS = c-family/c-common.o c-fa
c-family/array-notation-common.o c-family/cilk.o c-family/c-ubsan.o \
c-family/c-attribs.o c-family/c-warn.o
+# The self-test objects that are empty in release checking builds.
+SELFTEST_OBJS = selftest-rtl.o selftest-run-tests.o \
+ function-tests.o ggc-tests.o hash-map-tests.o hash-set-tests.o \
+ rtl-tests.o
+
# Language-independent object files.
# We put the *-match.o and insn-*.o files first so that a parallel make
# will build them sooner, because they are large and otherwise tend to be
@@ -1279,13 +1284,11 @@ OBJS = \
fold-const.o \
fold-const-call.o \
function.o \
- function-tests.o \
fwprop.o \
gcc-rich-location.o \
gcse.o \
gcse-common.o \
ggc-common.o \
- ggc-tests.o \
gimple.o \
gimple-builder.o \
gimple-expr.o \
@@ -1319,8 +1322,6 @@ OBJS = \
graphite-sese-to-poly.o \
gtype-desc.o \
haifa-sched.o \
- hash-map-tests.o \
- hash-set-tests.o \
hsa-common.o \
hsa-gen.o \
hsa-regalloc.o \
@@ -1429,7 +1430,6 @@ OBJS = \
resource.o \
rtl-chkp.o \
rtl-error.o \
- rtl-tests.o \
rtl.o \
rtlhash.o \
rtlanal.o \
@@ -1443,8 +1443,6 @@ OBJS = \
sel-sched-ir.o \
sel-sched-dump.o \
sel-sched.o \
- selftest-rtl.o \
- selftest-run-tests.o \
sese.o \
shrink-wrap.o \
simplify-rtx.o \
@@ -1574,7 +1572,8 @@ OBJS = \
xcoffout.o \
$(out_object_file) \
$(EXTRA_OBJS) \
- $(host_hook_obj)
+ $(host_hook_obj) \
+ $(SELFTEST_OBJS)
# Objects in libcommon.a, potentially used by all host binaries and with
# no target dependencies.
@@ -1607,6 +1606,10 @@ $(ALL_HOST_BACKEND_OBJS): ALL_COMPILERFL
$(ALL_HOST_BACKEND_OBJS): cc1plus.fda
endif
+# The self-test objects are empty in release checking builds, make sure
+# AIX/HPUX don't trigger comparison failures on them.
+$(SELFTEST_OBJS) selftest.o: ALL_COMPILERFLAGS += -frandom-seed=$@
+
# This lists all host object files, whether they are included in this
# compilation or not.
ALL_HOST_OBJS = $(ALL_HOST_FRONTEND_OBJS) $(ALL_HOST_BACKEND_OBJS)
