[Valgrind-users] Building from sources and "warning: switch -mcpu=cortex-a8 conflicts with -march=armv8-a+crc switch"

[Jeffrey W. <nol...@gm...>]

Hi Everyone,

I'm testing a Raspberry Pi 3. Its ARMv8 using Boradcom A53-based SoC.
The SoC is lower end, so its got ASIMD and CRC32, but it lacks PMULL
and other Crypto extensions. The gadget ships with a 32-bit Raspbian
OS, so its effectively in 32-bit mode.

My shell exports CFLAGS and CXXFLAGS, which are tuned for Aarch32:

$  echo $CXXFLAGS
-DNDEBUG -g2 -O3 -march=armv8-a+crc -mtune=cortex-a53
-mfpu=crypto-neon-fp-armv8 -mfloat-abi=hard
$ echo $CFLAGS
-DNDEBUG -g2 -O3 -march=armv8-a+crc -mtune=cortex-a53
-mfpu=crypto-neon-fp-armv8 -mfloat-abi=hard

Valgrind appears to have configured successfully: http://pastebin.com/nrenFK1f .

Make'ing results in the following.

I'm not sure what I should do at the moment. Is this a problem that
needs attention? Or am I OK to make install?

Thanks in advance.

**********

$ make
...
Making all in VEX
make[2]: Entering directory '/home/valgrind-3.11.0/VEX'
make  all-am
make[3]: Entering directory '/home/valgrind-3.11.0/VEX'
gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I../include -I../VEX/pub
-I../VEX/pub -DVGA_arm=1 -DVGO_linux=1 -DVGP_arm_linux=1
-DVGPV_arm_linux_vanilla=1 -Ipriv  -O2 -g -std=gnu99 -Wall
-Wmissing-prototypes -Wshadow -Wpointer-arith -Wstrict-prototypes
-Wmissing-declarations -Wcast-qual -Wwrite-strings -Wempty-body
-Wformat -Wformat-security -Wignored-qualifiers
-Wmissing-parameter-type -Wold-style-declaration -fno-stack-protector
-fno-strict-aliasing -fno-builtin  -marm -mcpu=cortex-a8
-Wbad-function-cast -fstrict-aliasing -DNDEBUG -g2 -O3
-march=armv8-a+crc -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8
-mfloat-abi=hard -MT priv/libvex_arm_linux_a-main_globals.o -MD -MP
-MF priv/.deps/libvex_arm_linux_a-main_globals.Tpo -c -o
priv/libvex_arm_linux_a-main_globals.o `test -f 'priv/main_globals.c'
|| echo './'`priv/main_globals.c
priv/main_globals.c:1:0: warning: switch -mcpu=cortex-a8 conflicts
with -march=armv8-a+crc switch

 ^
...