Rollup merge of rust-lang#36344 - sanxiyn:llvm-components, r=alexcrichton

Use LLVM_COMPONENTS to run tests just for supported targets

This is already done for simd-ffi test, but not for atomic-lock-free test.

Fix rust-lang#35023.

Author: Manishearth

src/test/run-make/atomic-lock-free/Makefile

@@ -5,26 +5,36 @@
 
 all:
 ifeq ($(UNAME),Linux)
+ifeq ($(filter x86,$(LLVM_COMPONENTS)),x86)
 	$(RUSTC) --target=i686-unknown-linux-gnu atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
 	$(RUSTC) --target=x86_64-unknown-linux-gnu atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
+endif
+ifeq ($(filter arm,$(LLVM_COMPONENTS)),arm)
 	$(RUSTC) --target=arm-unknown-linux-gnueabi atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
 	$(RUSTC) --target=arm-unknown-linux-gnueabihf atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
 	$(RUSTC) --target=armv7-unknown-linux-gnueabihf atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
+endif
+ifeq ($(filter aarch64,$(LLVM_COMPONENTS)),aarch64)
 	$(RUSTC) --target=aarch64-unknown-linux-gnu atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
+endif
+ifeq ($(filter mips,$(LLVM_COMPONENTS)),mips)
 	$(RUSTC) --target=mips-unknown-linux-gnu atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
 	$(RUSTC) --target=mipsel-unknown-linux-gnu atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
+endif
+ifeq ($(filter powerpc,$(LLVM_COMPONENTS)),powerpc)
 	$(RUSTC) --target=powerpc-unknown-linux-gnu atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
 	$(RUSTC) --target=powerpc64-unknown-linux-gnu atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
 	$(RUSTC) --target=powerpc64le-unknown-linux-gnu atomic_lock_free.rs
 	nm "$(TMPDIR)/libatomic_lock_free.rlib" | grep -vq __atomic_fetch_add
 endif
+endif