rust: add build profiles more aligned with ninja modes

A cargo profile is created for each of build modes: dev, debug,
sanitize, realease and coverage. The names of cargo profiles are
prefixed by "rust-" because cargo does not allow separate "dev"
and "debug" profiles.

The main difference between profiles are their optimization levels,
they correlate to the levels used in configure.py. The debug info
is stripped only in the dev mode, and only this mode uses
"incremental" compilation to speed it up.

configure.py

@@ -1887,7 +1887,7 @@ def configure_abseil(build_dir, mode, mode_config):
               pool = console
               description = TEST {mode}
             rule rust_lib.{mode}
-              command = CARGO_HOME=build/{mode}/rust/.cargo cargo build --release --manifest-path=rust/Cargo.toml --target-dir=build/{mode}/rust
+              command = CARGO_HOME=build/{mode}/.cargo cargo build --manifest-path=rust/Cargo.toml --target-dir=build/{mode} --profile=rust-{mode}
               description = RUST_LIB $out
             ''').format(mode=mode, antlr3_exec=antlr3_exec, fmt_lib=fmt_lib, test_repeat=test_repeat, test_timeout=test_timeout, **modeval))
         f.write(
@@ -1942,7 +1942,7 @@ def configure_abseil(build_dir, mode, mode_config):
                 ]])
                 objs.append('$builddir/' + mode + '/gen/utils/gz/crc_combine_table.o')
                 if has_rust:
-                    objs.append('$builddir/' + mode +'/rust/release/librust_combined.a')
+                    objs.append('$builddir/' + mode +'/rust-' + mode + '/librust_combined.a')
                 if binary in tests:
                     local_libs = '$seastar_libs_{} $libs'.format(mode)
                     if binary in pure_boost_tests:
@@ -2058,7 +2058,7 @@ def configure_abseil(build_dir, mode, mode_config):
             obj = cc.replace('.cc', '.o')
             f.write('build {}: cxx.{} {}\n'.format(obj, mode, cc))
         f.write('build {}: cxxbridge_header\n'.format('$builddir/{}/gen/rust/cxx.h'.format(mode)))
-        librust = '$builddir/{}/rust/release/librust_combined.a'.format(mode)
+        librust = '$builddir/{}/rust-{}/librust_combined.a'.format(mode, mode)
         librs_to_toml = lambda rs: rs.replace('src/lib.rs', 'Cargo.toml')
         rustsrcs = [ 'rust/src/lib.rs', 'rust/Cargo.toml' ] + list(rust_headers.values()) + list(map(librs_to_toml, rust_headers.values()))
         f.write('build {}: rust_lib.{} {}\n'.format(librust, mode, str.join(' ', rustsrcs)))

rust/Cargo.toml

@@ -9,3 +9,30 @@ inc = { path = "inc", version = "0.1.0" }
 
 [lib]
 crate-type = ["staticlib"]
+
+[profile.rust-dev]
+inherits = "dev"
+opt-level = 2
+debug = false
+overflow-checks = false
+debug-assertions = false
+strip = "symbols"
+
+[profile.rust-debug]
+inherits = "dev"
+opt-level = 1
+incremental = false
+
+[profile.rust-sanitize]
+inherits = "dev"
+opt-level = "s"
+incremental = false
+
+[profile.rust-release]
+inherits = "release"
+debug = true
+
+[profile.rust-coverage]
+inherits = "dev"
+opt-level = 1
+incremental = false