The sbt plugin should offer a way to compile C files #657
Description
It would be useful to allow application and libraries to drop down to C for parts of their implementation, for example to not be blocked by limitations such as the ability to pass structs by value. One example is bindgen which currently need a think C wrapper to use libclang. Another example would be to use a C++ library.
The sbt plugin should provide a setting or task which makes it possible to compile C files and include the resulting object files in the nativeCompileLL task used by the linker.
Example code from #642
nativeCompileLL += {
val logger = nativeLogger.value
val cwd = nativeWorkdir.value
val compiler = nativeClang.value.getAbsolutePath
val opts = nativeCompileOptions.value
val cpath = (resourceDirectory in Compile).value / "clang.c"
val opath = (crossTarget in Compile).value / "clang.o"
val compilec = Seq(compiler) ++ opts ++ Seq("-c",
cpath.toString,
"-o",
opath.toString)
val exitCode = Process(compilec, cwd) ! logger
if (exitCode != 0) {
println("Failed to compile " + cpath)
}
opath
}