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After installing official 10.2-2020.11 AARCH64 / ARM toolchains from
https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads,
under /home/user/.local, I've noticed that
clang -target aarch64-linux-gnu \
-gcc-toolchain
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu \
--sysroot
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/aarch64-none-linux-gnu/libc
\
hello.c
works just as expected, but
clang -target arm-linux-gnueabihf \
-gcc-toolchain
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf \
--sysroot
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc
\
hello.c
is not:
clang -v -target arm-linux-gnueabihf -gcc-toolchain
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf
--sysroot
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc
t-hello.c
clang version 13.0.0 (g...@github.com:llvm/llvm-project.git
8caf835337f7bae9d686afdfc16c4897f2da61d8
<https://reviews.llvm.org/rG8caf835337f7bae9d686afdfc16c4897f2da61d8>)
Target: arm-unknown-linux-gnueabihf
Thread model: posix
InstalledDir: /home/user/.local/llvm-13.0.0/bin
"/home/user/.local/llvm-13.0.0/bin/clang-13" -cc1 -triple
armv6kz-unknown-linux-gnueabihf -emit-obj -mrelax-all --mrelax-relocations
-disable-free -disable-llvm-verifier -discard-value-names -main-file-name
t-hello.c -mrelocation-model static -mframe-pointer=all -fmath-errno
-fno-rounding-math -mconstructor-aliases -target-cpu arm1176jzf-s
-target-feature +strict-align -target-abi aapcs-linux -mfloat-abi hard
-fallow-half-arguments-and-returns -fno-split-dwarf-inlining
-debugger-tuning=gdb -v -resource-dir
/home/user/.local/llvm-13.0.0/lib64/clang/13.0.0 -isysroot
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc
-internal-isystem
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/local/include
-internal-isystem /home/user/.local/llvm-13.0.0/lib64/clang/13.0.0/include
-internal-externc-isystem
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/include
-internal-externc-isystem
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/include
-fdebug-compilation-dir /home/user/tmp -ferror-limit 19 -fno-signed-char
-fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -o /tmp/t-hello-d957f6.o -x
c t-hello.c
clang -cc1 version 13.0.0 based upon LLVM 13.0.0git default target
x86_64-unknown-linux-gnu
ignoring nonexistent directory
"/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/local/include"
ignoring nonexistent directory
"/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/include"
#include "..." search starts here:
#include <...> search starts here:
/home/user/.local/llvm-13.0.0/lib64/clang/13.0.0/include
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/include
End of search list.
"/usr/bin/ld"
--sysroot=/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc
-EL -X --hash-style=gnu --eh-frame-hdr -m armelf_linux_eabi -dynamic-linker
/lib/ld-linux-armhf.so.3 -o a.out
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/lib/../lib/crt1.o
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/lib/../lib/crti.o
crtbegin.o
-L/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/lib/../lib
-L/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/lib/../lib
-L/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/lib
-L/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/lib
/tmp/t-hello-d957f6.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc
--as-needed -lgcc_s --no-as-needed crtend.o
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/lib/../lib/crtn.o
/usr/bin/ld: fatal error:
/home/user/.local/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/lib/../lib/crt1.o:
unsupported ELF machine number 40
clang-13: error: linker command failed with exit code 1 (use -v to see
invocation)
This is because the driver recognizes 'aarch64-none-linux-gnu' as AARCH64
triple but
ignores 'arm-none-linux-gnueabihf' for ARM. So I think this should be fixed.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D96402
Files:
clang/lib/Driver/ToolChains/Gnu.cpp
Index: clang/lib/Driver/ToolChains/Gnu.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Gnu.cpp
+++ clang/lib/Driver/ToolChains/Gnu.cpp
@@ -2084,6 +2084,7 @@
static const char *const ARMTriples[] = {"arm-linux-gnueabi",
"arm-linux-androideabi"};
static const char *const ARMHFTriples[] = {"arm-linux-gnueabihf",
+ "arm-none-linux-gnueabihf",
"armv7hl-redhat-linux-gnueabi",
"armv6hl-suse-linux-gnueabi",
"armv7hl-suse-linux-gnueabi"};
Index: clang/lib/Driver/ToolChains/Gnu.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Gnu.cpp
+++ clang/lib/Driver/ToolChains/Gnu.cpp
@@ -2084,6 +2084,7 @@
static const char *const ARMTriples[] = {"arm-linux-gnueabi",
"arm-linux-androideabi"};
static const char *const ARMHFTriples[] = {"arm-linux-gnueabihf",
+ "arm-none-linux-gnueabihf",
"armv7hl-redhat-linux-gnueabi",
"armv6hl-suse-linux-gnueabi",
"armv7hl-suse-linux-gnueabi"};
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