Get codebase completely working with LLVM

You can now build Cosmopolitan with Clang:

    make -j8 MODE=llvm
    o/llvm/examples/hello.com

The assembler and linker code is now friendly to LLVM too.
So it's not needed to configure Clang to use binutils under
the hood. If you love LLVM then you can now use pure LLVM.

Makefile

@@ -117,8 +117,6 @@ include third_party/gdtoa/gdtoa.mk		# │  You can finally call malloc()
 include libc/time/time.mk			# │
 include libc/alg/alg.mk				# │
 include libc/stdio/stdio.mk			# │
-include third_party/f2c/f2c.mk			# │
-include third_party/blas/blas.mk		# │
 include net/net.mk				# │
 include libc/log/log.mk				# │
 include dsp/core/core.mk			# │
@@ -203,7 +201,7 @@ CHECKS	= $(foreach x,$(PKGS),$($(x)_CHECKS))
 
 bins:	$(BINS)
 check:	$(CHECKS)
-test:	$(TESTS)
+test:	$(TESTS) all
 depend:	o/$(MODE)/depend
 tags:	TAGS HTAGS
 

README.md

@@ -4,10 +4,10 @@
 
 [Cosmopolitan Libc](https://justine.lol/cosmopolitan/index.html) makes C
 a build-once run-anywhere language, like Java, except it doesn't need an
-interpreter or virtual machine. Instead, it reconfigures stock GCC to
-output a POSIX-approved polyglot format that runs natively on Linux +
-Mac + Windows + FreeBSD + OpenBSD + NetBSD + BIOS with the best possible
-performance and the tiniest footprint imaginable.
+interpreter or virtual machine. Instead, it reconfigures stock GCC and
+Clang to output a POSIX-approved polyglot format that runs natively on
+Linux + Mac + Windows + FreeBSD + OpenBSD + NetBSD + BIOS with the best
+possible performance and the tiniest footprint imaginable.
 
 ## Background
 
@@ -18,24 +18,33 @@ libc](https://justine.lol/cosmopolitan/index.html) website. We also have
 
 ## Getting Started
 
-Cosmopolitan can be compiled from source on any Linux distro.
+If you're doing your development work on Linux or BSD then you need just
+five files to get started:
 
 ```sh
+wget https://justine.lol/cosmopolitan/cosmopolitan-amalgamation-0.1.2.zip
+unzip cosmopolitan-amalgamated-0.1.2.zip
+echo 'main() { printf("hello world\n"); }' >hello.c
+gcc -g -O -static -nostdlib -nostdinc -fno-pie -no-pie -mno-red-zone \
+  -o hello.com.dbg hello.c -fuse-ld=bfd -Wl,-T,ape.lds \
+  -include cosmopolitan.h crt.o ape.o cosmopolitan.a
+objcopy -S -O binary hello.com.dbg hello.com
+./hello.com
+```
+
+If you're developing on Windows or MacOS then you need to download an
+x86_64-pc-linux-gnu toolchain beforehand. See the [Compiling on
+Windows](https://justine.lol/cosmopolitan/windows-compiling.html)
+tutorial. It's needed because the ELF object format is what makes
+universal binaries possible.
+
+Cosmopolitan can also be compiled from source on any Linux distro.
+
+```sh
+wget https://justine.lol/cosmopolitan/cosmopolitan-0.1.2.tar.gz
 tar xf cosmopolitan-0.1.2.tar.gz  # see releases page
 cd cosmopolitan-0.1.2
 make -j16
 o//examples/hello.com
 find o -name \*.com | xargs ls -rShal | less
 ```
-
-Alternatively you can use the release binaries:
-
-```sh
-unzip cosmopolitan-amalgamated-0.1.2.zip  # see releases page
-echo 'main() { printf("hello world\n"); }' >hello.c
-gcc -g -O -static -fno-pie -no-pie -mno-red-zone -nostdlib -nostdinc \
-  -o hello.com.dbg hello.c -Wl,--gc-sections -Wl,-z,max-page-size=0x1000 -fuse-ld=bfd \
-  -Wl,-T,ape.lds -include cosmopolitan.h crt.o ape.o cosmopolitan.a
-objcopy -SO binary hello.com.dbg hello.com
-./hello.com
-```