https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91034
Bug ID: 91034
Summary: In tree build of gmp fails on Raspberry Pi4 (ARM
Cortex A72) with `mls r1,r4,r8,r11' not supported in
ARM mode
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: andrewm.roberts at sky dot com
Target Milestone: ---
When building gcc 9.1.0 (or 8.3.0) on Raspberry Pi 4 (ARM Cortex A72 in 32 bit
mode)
in tree build of gmp 6.1.2 (or 6.1.0) fails to build with:
tmp-divrem_1.s:129: Error: selected processor does not support `mls
r1,r4,r8,r11' in ARM mode
gmp 6.1.2 builds fine outside of gcc, thus its not a straight binutils issue,
but something to do with how gcc is configuring/building gmp.
The same configurations and version builds gcc-9.1.0/8.3.0 fine on Raspberry Pi
Zero and Pi 3b etc.
/proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt
vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
uname -a
Linux raspberrypi 4.19.50-v7l+ #895 SMP Thu Jun 20 16:03:42 BST 2019 armv7l
GNU/Linux
OS: Raspbian GNU/Linux 10 (buster)
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/8/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Raspbian 8.3.0-6+rpi1'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=arm-linux-gnueabihf- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libquadmath --disable-libquadmath-support --enable-plugin
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-sjlj-exceptions --with-arch=armv6 --with-fpu=vfp
--with-float=hard --disable-werror --enable-checking=release
--build=arm-linux-gnueabihf --host=arm-linux-gnueabihf
--target=arm-linux-gnueabihf
Thread model: posix
gcc version 8.3.0 (Raspbian 8.3.0-6+rpi1)
gcc -march=native -Q --help=target
The following options are target specific:
-mabi= aapcs-linux
-mabort-on-noreturn [disabled]
-mandroid [disabled]
-mapcs [disabled]
-mapcs-frame [disabled]
-mapcs-reentrant [disabled]
-mapcs-stack-check [disabled]
-march= armv8-a+crc+simd
-marm [enabled]
-masm-syntax-unified [disabled]
-mbe32 [enabled]
-mbe8 [disabled]
-mbig-endian [disabled]
-mbionic [disabled]
-mbranch-cost= -1
-mcallee-super-interworking [disabled]
-mcaller-super-interworking [disabled]
-mcmse [disabled]
-mcpu=
-mfix-cortex-m3-ldrd [disabled]
-mflip-thumb [disabled]
-mfloat-abi= hard
-mfp16-format= none
-mfpu= vfp
-mglibc [enabled]
-mhard-float
-mlittle-endian [enabled]
-mlong-calls [disabled]
-mmusl [disabled]
-mneon-for-64bits [disabled]
-mpic-data-is-text-relative [enabled]
-mpic-register=
-mpoke-function-name [disabled]
-mprint-tune-info [disabled]
-mpure-code [disabled]
-mrestrict-it [disabled]
-msched-prolog [enabled]
-msingle-pic-base [disabled]
-mslow-flash-data [disabled]
-msoft-float
-mstructure-size-boundary= 8
-mthumb [disabled]
-mthumb-interwork [disabled]
-mtls-dialect= gnu
-mtp= cp15
-mtpcs-frame [disabled]
-mtpcs-leaf-frame [disabled]
-mtune=
-muclibc [disabled]
-munaligned-access [enabled]
-mvectorize-with-neon-double [disabled]
-mvectorize-with-neon-quad [enabled]
-mword-relocations [disabled]
Known ARM ABIs (for use with the -mabi= option):
aapcs aapcs-linux apcs-gnu atpcs iwmmxt
Known __fp16 formats (for use with the -mfp16-format= option):
alternative ieee none
Known ARM FPUs (for use with the -mfpu= option):
auto crypto-neon-fp-armv8 fp-armv8 fpv4-sp-d16 fpv5-d16 fpv5-sp-d16 neon
neon-fp-armv8 neon-fp16 neon-vfpv3 neon-vfpv4 vfp vfp3 vfpv2 vfpv3
vfpv3-d16
vfpv3-d16-fp16 vfpv3-fp16 vfpv3xd vfpv3xd-fp16 vfpv4 vfpv4-d16
Valid arguments to -mtp=:
auto cp15 soft
Known floating-point ABIs (for use with the -mfloat-abi= option):
hard soft softfp
TLS dialect to use:
gnu gnu2
ld -v
GNU ld (GNU Binutils for Raspbian) 2.31.1
m4 --version
m4 (GNU M4) 1.4.18
gcc 9.1.0 build with in-tree gmp 6.1.2 fails here (while building gmp):
m4 -DHAVE_CONFIG_H -D__GMP_WITHIN_GMP -DOPERATION_divrem_1 -DNO_ASM
divrem_1.asm >tmp-divrem_1.s
arm-linux-gnueabihf-gcc -c -DHAVE_CONFIG_H -I. -I../../../gcc-9.1.0/gmp/mpn
-I.. -D__GMP_WITHIN_GMP -I../../../gcc-9.1.0/gmp -DOPERATION_divrem_1 -DNO_ASM
-O2 -g -pipe -Wa,--noexecstack tmp-divrem_1.s -o divrem_1.o
tmp-divrem_1.s: Assembler messages:
tmp-divrem_1.s:129: Error: selected processor does not support `mls
r1,r4,r8,r11' in ARM mode
tmp-divrem_1.s:145: Error: selected processor does not support `mls
r1,r4,r8,r11' in ARM mode
tmp-divrem_1.s:158: Error: selected processor does not support `mls
r1,r4,r8,r11' in ARM mode
tmp-divrem_1.s:175: Error: selected processor does not support `mls
r1,r4,r3,r8' in ARM mode
tmp-divrem_1.s:209: Error: selected processor does not support `mls
r11,r4,r12,r3' in ARM mode
make[4]: *** [Makefile:768: divrem_1.lo] Error 1
make[4]: Leaving directory '/home/pi/gcc/gcc-build/gmp/mpn'
make[3]: *** [Makefile:956: all-recursive] Error 1
If gmp 6.1.2 is built stand alone (using its own ./configure ; make) it
compiles ok:
m4 -DHAVE_CONFIG_H -D__GMP_WITHIN_GMP -DOPERATION_divrem_1 -DPIC divrem_1.asm
>tmp-divrem_1.s
gcc -c -DHAVE_CONFIG_H -I. -I.. -D__GMP_WITHIN_GMP -I.. -DOPERATION_divrem_1
-O2 -pedantic -fomit-frame-pointer -march=armv8-a -mfloat-abi=hard -mfpu=neon
-mtune=cortex-a72 -Wa,--noexecstack tmp-divrem_1.s -fPIC -DPIC -o
.libs/divrem_1.o
