Returning uint16 from WASI functions is technically correct. However,
the smallest integer type in WASM is int32 and since we don't guarantee
that the upper 16 bits of the result are zero'ed, it can result in
tricky bugs if the language SDK being used in the WASM app does not cast
back immediately to uint16. To prevent this, we directly return uint32
instead, so that the result is well-defined as a 32-bit number.
This PR attempts to search for the system libuv and use it if found instead of
downloading it. As reported in #1831, this is needed because some tools
build in a sandbox and clear the extra sources.
Apply clang-format for core/iwasm/compilation and core/iwasm/libraries files.
Add wasm-c-api empty_imports sample to workflow test.
And enable triggering workflow when core/config.h changes.
Enable to use BH_VPRINTF macro for platform Linux/Windows/Darwin/VxWorks to redirect the stdout output from platform os_printf/os_vprintf, or the wasi output from wasm app to the vprintf like callback function specified by BH_VPRINTF macro of cmake WAMR_BH_VPRINTF variable.
Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>
