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meson/test cases/rust/14 external libm/prog.rs

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tests/rust: Add rust case linking to libm in rust static library When building on Linux, I see: rustc -C linker=cc --color=always --crate-type rlib --crate-name rs_math -g --emit dep-info=rs_math.d --emit link -L /usr/lib/x86_64-linux-gnu -o librs_math.rlib -l static=m ../rs_math.rs error: failed to add native library /usr/lib/x86_64-linux-gnu/libm.a: file too small to be an archive I think the "file too small to be an archive" message is coming from libLLVM, and is a case of LLVM not handling this type of "script archive". So, possibly this is just LLVM not handling a linking case. The rust_args usage in meson.build is invalid, but required to reproduce the issue in the test case. Perhaps meson should automatically add the library include path via the dep_m meson object, or maybe the meson.build can add the link path in a better way. Changing '-l static=m' to '-l dylib=m' appears to fix this case. (See comments in meson.build.)
4 years ago
extern crate rs_math;
fn main() {
assert_eq!(rs_math::rs_log2(8.0), 3.0);
}