Hello Simon,
While trying to find a u-boot make command which likely works with a pre-build clang linux package I got the following warnings:
`make CC="clang -no-integrated-as" HOSTCC="clang -no-integrated-as" HOST_TOOLS_ALL=y sandbox_config tools`
/home/jeroen/software/u-boot/arch/sandbox/include/asm/bitops.h:59:17: warning: variable 'flags' is uninitialized when used here [-Wuninitialized] local_irq_save(flags); ^~~~~ /home/jeroen/software/u-boot/arch/sandbox/include/asm/bitops.h:56:21: note: initialize the variable 'flags' to silence this warning unsigned long flags; ^ = 0 /home/jeroen/software/u-boot/arch/sandbox/include/asm/bitops.h:81:17: warning: variable 'flags' is uninitialized when used here [-Wuninitialized] local_irq_save(flags); ^~~~~ /home/jeroen/software/u-boot/arch/sandbox/include/asm/bitops.h:78:21: note: initialize the variable 'flags' to silence this warning unsigned long flags; ^ = 0
I guess gcc accepts this since flags is not actually used. Anyway merely mentioned for completeness. You might be interested in:
/home/jeroen/software/u-boot/tools/../lib/rsa/rsa-sign.c:77:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] if (!rsa) { ^~~~ /home/jeroen/software/u-boot/tools/../lib/rsa/rsa-sign.c:94:9: note: uninitialized use occurs here return ret; ^~~ /home/jeroen/software/u-boot/tools/../lib/rsa/rsa-sign.c:77:2: note: remove the 'if' if its condition is always false if (!rsa) { ^~~~~~~~~~~ /home/jeroen/software/u-boot/tools/../lib/rsa/rsa-sign.c:48:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0
which actually looks like a bug. And:
/home/jeroen/software/u-boot/tools/../lib/rsa/rsa-verify.c:59:27: warning: comparison of unsigned expression >= 0 is always true [-Wtautological-compare] for (i = key->len - 1; i >= 0; i--) { ~ ^ ~
which looks a bit odd, especially since there is no way to break out of the loop and reach the final return statement, which has a comment to that it might be useful (equal).
Regards, Jeroen