Dom324

Hello, firstly thanks for making such a great tool! I believe I found a bug where `sources` are checked before `deps` complete: ``` compile_sources: deps: [preprocess_sources] sources: - "./build/**/*.cc" generates:...

**Describe the bug** I compile libzstd in folder `lib` with: ``` make ZSTD_LIB_COMPRESSION=0 ZSTD_LIB_DICTBUILDER=0 ZSTD_LIB_DEPRECATED=0 ZSTD_LEGACY_SUPPORT=0 ZSTD_NO_UNUSED_FUNCTIONS=1 DYNAMIC_BMI2=0 CC=clang ``` When I add `CFLAGS` on command line and override BMI2...