unicore32: do not evaluate compiler's library path when cleaning
Since commit a83e4ca2 ("kbuild: remove cc-option switch from -Wframe-larger-than="), 'make ARCH=unicore32 clean' emits error messages as follows: $ make ARCH=unicore32 clean gcc: error: missing argument to '-Wframe-larger-than=' gcc: error: missing argument to '-Wframe-larger-than=' We do not care compiler flags when cleaning. Use the '=' operator for lazy expansion because we do not use GNU_LIBC_A or GNU_LIBGCC_A when cleaning. Fixes: a83e4ca2 ("kbuild: remove cc-option switch from -Wframe-larger-than=") Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
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