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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/115493] [15 regression] gcc.c-torture/execute/pr94734.c
 fails on MVE after r15-1054-g202a9c8fe7d
Date: Mon, 17 Jun 2024 08:05:05 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115493

--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
That's because such a configuration builds libs for A-profile (cortex-A*),
which are incompatible with M-profile (cortex-M*).  (In addition I think you
have to use gnueabihf instead of gnueabi, IIRC --with-float=3Dhard is not
sufficient).

You can't build an arm-linux-* toolchain for cortex-M.

So I suggest you build your toolchain with the flags I suggested in the
description:
with GCC configured with:
--disable-multilib --with-mode=3Dthumb --with-arch=3Darmv8.1-m.main+mve.fp+=
fp.dp
--with-float=3Dhard --target=3Darm-eabi

It shouldn't be very long since multilibs are disabled.


Alternatively, you can try to use our ABE build script:

git clone https://git.linaro.org/toolchain/abe.git
cd abe
./configure
./abe.sh --build all --target arm-eabi --extraconfigdir config/master --dis=
able
make_docs --set languages=3Dc,c++,lto --set
gcc_override_configure=3D--disable-multilib --set
gcc_override_configure=3D--with-mode=3Dthumb --set
gcc_override_configure=3D--with-arch=3Darmv8.1-m.main+mve.fp+fp.dp --set
gcc_override_configure=3D--with-float=3Dhard --check gcc --set
'target_board_options=3D{-mthumb/-march=3Darmv8.1-m.main+mve.fp+fp.dp/-mtun=
e=3Dcortex-m55/-mfloat-abi=3Dhard/-mfpu=3Dauto}'
--qemu-cpu cortex-m55 --set runtestflags=3Dexecute.exp=3Dpr94734.c

That will clone all repos (binutils-gdb, gcc, newlib, qemu), build the full
toolchain from scratch, and run the test.=