Fix build with clang by using llvm-ar #607
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When building with clang and RV32F enabled, linking fails with undefined references to SoftFloat functions. For example: $ make CC=clang-18 /usr/bin/ld: /tmp/lto-llvm-28abb9.o: in function `do_fmadds': emulate.c:(.text.do_fmadds+0x3c): undefined reference to `f32_mulAdd' /usr/bin/ld: /tmp/lto-llvm-28abb9.o: in function `do_fadds': emulate.c:(.text.do_fadds+0x31): undefined reference to `f32_add' This happens because GNU ar cannot correctly archive objects compiled with clang. Switch to llvm-ar when CC is clang, ensuring the SoftFloat library is archived correctly and the build succeeds.
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When building with clang and RV32F enabled, linking fails with undefined references to SoftFloat functions. For example:
$ make CC=clang-18
/usr/bin/ld: /tmp/lto-llvm-28abb9.o: in function
do_fmadds': emulate.c:(.text.do_fmadds+0x3c): undefined reference tof32_mulAdd'/usr/bin/ld: /tmp/lto-llvm-28abb9.o: in function
do_fadds': emulate.c:(.text.do_fadds+0x31): undefined reference tof32_add'This happens because GNU ar cannot correctly archive objects compiled with clang. Switch to llvm-ar when CC is clang, ensuring the SoftFloat library is archived correctly and the build succeeds.