facing difficulty in selecting arch & abi combination for rebulding gcc SRPM on RISC-V Fedora

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Dear all,

>From last 10 days I am struggling to rebuilding  gcc-10.2.1-9.fc33.src.rpm  SRPM on RISC-V Fedora image. Here I am planning to rebuilt this SRPM without compressed instruction support. Following changed I have done on gcc.spec file.

 %ifarch riscv64
	--with-arch=rv64g --with-abi=lp64
%endif

Even by changing above two flags for different options. still i am not able to rebuilt it. Here I am listing all combinations and error result what I have tried for rebuilding gcc SRPM.

1. %ifarch riscv64
	--with-arch=rv64g  --with-multilib
	
		
	Result: #error "rv32i-based targets are not supported"

	
2. %ifarch riscv64
	--with-arch=rv64imafd  --enable-multilib  --with-multilib-list=lp64	
	
	
	Result:
	
	unsupported --with-arch for --with-multilib-list
	make[2]: *** [Makefile:4441: configure-stage1-gcc] Error 1
	make[2]: Leaving directory '/root/rpmbuild/BUILD/gcc-10.2.1-20201125/obj-riscv64-redhat-linux'

	
3. %ifarch riscv64
	--with-arch=rv64imafd --enable-multilib --with-multilib-list=lp64d
		
	Result:
	
	unsupported --with-arch for --with-multilib-list
	make[2]: *** [Makefile:4441: configure-stage1-gcc] Error 1
	make[2]: Leaving directory '/root/rpmbuild/BUILD/gcc-10.2.1-20201125/obj-riscv64-redhat-linux'
	
		
4. %ifarch riscv64
	--with-arch=rv64g --with-abi=lp64d --with-multilib-list=lp64d
	
	Result:	
	
	unsupported --with-arch for --with-multilib-list
	make[2]: *** [Makefile:4441: configure-stage1-gcc] Error 1

		
5. %ifarch riscv64
	--with-arch=rv64g --with-abi=lp64 --with-multilib-list=lp64
	
	
	Result:	unsupported --with-arch for --with-multilib-list	
	
	
6. %ifarch riscv64
	--with-arch=rv64g --enable-multilib
		
	Result: #error "rv32i-based targets are not supported"
	
	
7. %ifarch riscv64
	--with-arch=rv64g --with-abi=lp64
	
	Result: #error "rv32i-based targets are not supported"
		
	
8.  %ifarch riscv64
	--with-arch=rv64g --with-multilib-generator="rv64ima-lp64--f"

	Result: #error "rv32i-based targets are not supported"

		
9. %ifarch riscv64
	--with-arch=rv64g --with-abi=lp64 --with-multilib-generator="rv64ima-lp64--f"	

	Result: error: #error "rv32i-based targets are not supported"

	
10. %ifarch riscv64
	--with-arch=rv64g --enable-multilib --with-multilib-generator="rv64ima-lp64--f" 	
	
	
	Result: #error "rv32i-based targets are not supported"
	

Here very important observation I have noted. when I am giving below option

%ifarch riscv64
	--with-arch=rv64g --disable-multilib
	
Here all library packages are going to /usr/lib folder path, but in-between rebuilding process move commands are there, that are trying to move files from /usr/lib64 path. But no file is there in /usr/lib64 path. all falied move commads files are there in /usr/lib path.
	
	
	 
Can anyone please spend some time on this issue and help me out for successfull rebulding gcc SRPM. Please suggest perfect combination for sucessfull rebuilding. I hope someone faced same problem before i think, thier expreince will heplfull for me.

Thanks
Billa Surendra

	
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