Revert "Parallelize depend file generation"
This reverts commit d5b6ec450fde069a4e64569b0eb7e4fcb3b96e83.
parallel depend ddc does not significantly speed up compilation,
intermediately generated .ddc files can cause problems if compilation is interrupted unexpectedly
Signed-off-by: xuxin19 <xuxin19@xiaomi.com>
porting from https://github.com/kokke/tiny-bignum-c commit ac136565378c624365e0f5f556d386b3966bff32 and adapting to the nuttx
Signed-off-by: makejian <makejian@xiaomi.com>
Make.dep file should be updated by .config changed after first make.
There are 2 cases affected for this problem:
1) Add source files by config symbol
2) Include header files in #ifdef directive
These 2 cases may not be included in Make.dep and this may prevent the
differential build from working correctly.
This reverts commit 79af7fbf4ef0185fa501e23a900a2ad933f845a7.
Because:
* btashton reported some issues in local builds:
https://github.com/apache/incubator-nuttx/pull/603#issuecomment-602264860
* this might be related to the current CI breakage:
> /bin/sh: 1: /__w/incubator-nuttx/incubator-nuttx/nuttx/tools/mkdeps: not found
Entropy pool gathers environmental noise from device drivers, user-space, etc., and returns good random numbers, suitable for cryptographic use. Based on entropy pool design from *BSDs and uses BLAKE2Xs algorithm for CSPRNG output.
Patch also adds /dev/urandom support for using entropy pool RNG and new 'getrandom' system call for getting randomness without file-descriptor usage (thus avoiding file-descriptor exhaustion attacks). The 'getrandom' interface is similar as 'getentropy' and 'getrandom' available on OpenBSD and Linux respectively.
