Unrecognised emulation mode when building simple yasm project

[abdelwahabzbal]

Describe the problem details

I'm trying to build simple Hello world program, then

$ xmake build -v
ld -o build/linux/x86_64/release/yasm build/.objs/yasm/linux/x86_64/release/main.s.o --dynamic-linker /lib/ld-linux-x86-64.so.2 -lc -m elf_x86_64 -s -L/usr/local/lib -L/usr/lib -m64
error: ld: unrecognised emulation mode: 64
Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu elf_l1om elf_k1om i386pep i386pe

Question: Why -m64 is passed by default to linker (unrecognised) and how to remove them.

[waruqi]

Can you let me see the whole configuration command and output.

xmake f --toolchain=yasm
xmake -rv

It works fine for me.

$ xmake f -c --toolchain=yasm
checking for architecture ... x86_64
$ xmake -rv
[ 40%]: ccache compiling.release src/main.S
/usr/bin/yasm -I/usr/local/include -I/usr/include -f elf64 -o build/.objs/test/linux/x86_64/release/src/main.S.o src/main.S
[ 60%]: ccache compiling.release src/stub.c
/usr/bin/ccache /usr/bin/gcc -c -I/usr/local/include -I/usr/include -m64 -o build/.objs/test/linux/x86_64/release/src/stub.c.o src/stub.c
[ 80%]: linking.release test
/usr/bin/g++ -o build/linux/x86_64/release/test build/.objs/test/linux/x86_64/release/src/main.S.o build/.objs/test/linux/x86_64/release/src/stub.c.o -L/usr/local/lib -L/usr/lib -m64
[100%]: build ok!

[abdelwahabzbal]

$ xmake f -c --toolchain=yasm
checking for the architecture ... x86_64
$ xmake -rv
checking for the g++ ... /usr/bin/g++
checking for the linker (ld) ... g++
checking for the yasm ... /usr/bin/yasm
checking for the assember (as) ... yasm
checking for the ccache ... no
[ 50%]: compiling.release main.s
/usr/bin/yasm -I/usr/local/include -I/usr/include -f elf64 -o build/.objs/yasm/linux/x86_64/release/main.s.o main.s
[ 75%]: linking.release yasm
/usr/bin/g++ -o build/linux/x86_64/release/yasm build/.objs/yasm/linux/x86_64/release/main.s.o -s -L/usr/local/lib -L/usr/lib -m64
error: /usr/bin/ld: build/.objs/yasm/linux/x86_64/release/main.s.o: relocation R_X86_64_32 against `.data' can not be used when making a PIE object; recompile with -fPIE

Fixed with :
$ xmake f -c --toolchain=yasm --ldflags="-no-pie"

[abdelwahabzbal]

But when we use linux ld
$ xmake config -c --toolchain=yasm --ld=ld
checking for the architecture ... x86_64
$ xmake -rv
checking for the yasm ... /usr/bin/yasm
checking for the assember (as) ... yasm
checking for the ccache ... no
[ 50%]: compiling.release main.s
/usr/bin/yasm -I/usr/local/include -I/usr/include -f elf64 -o build/.objs/yasm/linux/x86_64/release/main.s.o main.s
[ 75%]: linking.release yasm
ld -o build/linux/x86_64/release/yasm build/.objs/yasm/linux/x86_64/release/main.s.o -s -L/usr/local/lib -L/usr/lib -m64
error: ld: unrecognised emulation mode: 64
Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu elf_l1om elf_k1om i386pep i386pe

[waruqi]

Please do not directly set ld as the ld of xmake, xmake only uses g++/clang++ as the linker by default. If you want to modify the actual ld, you can use -fuse-ld=gold/lld to switch the internal ld linker