MIPS: Only check -msym32 when need-compiler

During 'make modules_install', the need-compiler variable is null, so
Makefile.compiler isn't included.  This results in call cc-option-yn
returning nothing and consequently an error is issued:

*** CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32.  Stop.

and the invocation terminated for configurations that set the Kconfig
option named.

Previously commit a79a404e6c22 ("MIPS: Fix CONFIG_CPU_DADDI_WORKAROUNDS
`modules_install' regression") addressed the same issue for GCC versions
now supported for Linux compilation, but caused a build error with Clang
because it doesn't support '-msym32'.  Then commit 18ca63a2e23c ("MIPS:
Probe toolchain support of -msym32") fixed the issue with Clang, but
reintroduced the 'make modules_install' error listed above.

Wrap the handling of the '-msym32' option then with ifdef need-compiler,
fixing said error for 'make modules_install'.

For more technical details on why need-compiler is null during 'make
modules_install' and why no compiler invocation is actually needed at
this point, please refer to commit 4fe4a6374c4d ("MIPS: Only fiddle with
CHECKFLAGS if need-compiler") and commit 805b2e1d427a ("kbuild: include
Makefile.compiler only when compiler is needed").

NB leading 8 spaces rather than tabs required due to `make' syntax.

Link: https://lore.kernel.org/all/alpine.DEB.2.21.2502120612000.65342@angie.orcam.me.uk/
Link: https://lore.kernel.org/all/alpine.DEB.2.21.2307180025120.62448@angie.orcam.me.uk/
Fixes: a79a404e6c22 ("MIPS: Fix CONFIG_CPU_DADDI_WORKAROUNDS `modules_install' regression")
Reported-by: Maciej W. Rozycki <macro@orcam.me.uk>
Closes: https://lore.kernel.org/all/alpine.DEB.2.21.2501030535080.49841@angie.orcam.me.uk/
Co-developed-by: Chen Linxuan <chenlinxuan@uniontech.com>
Signed-off-by: Chen Linxuan <chenlinxuan@uniontech.com>
Signed-off-by: WangYuli <wangyuli@uniontech.com>
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Reviewed-by: Chen Linxuan <me@black-desk.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

0 files changed, 0 insertions, 0 deletions