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Unified Diff: fusl/INSTALL

Issue 1574103002: Remove cruft from fusl (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: fusl/INSTALL
diff --git a/fusl/INSTALL b/fusl/INSTALL
deleted file mode 100644
index 5713cd49baf74224dc0246bd7067b36923ae2772..0000000000000000000000000000000000000000
--- a/fusl/INSTALL
+++ /dev/null
@@ -1,179 +0,0 @@
-
-Quick Installation Guide for musl libc
-======================================
-
-There are many different ways to install musl depending on your usage
-case. This document covers only the build and installation of musl by
-itself, which is useful for upgrading an existing musl-based system or
-compiler toolchain, or for using the provided musl-gcc wrapper with an
-existing non-musl-based compiler.
-
-Building complete native or cross-compiler toolchains is outside the
-scope of this INSTALL file. More information can be found on the musl
-website and community wiki.
-
-
-Build Prerequisites
--------------------
-
-The only build-time prerequisites for musl are GNU Make and a
-freestanding C99 compiler toolchain targeting the desired instruction
-set architecture and ABI, with support for gcc-style inline assembly,
-weak aliases, and stand-alone assembly source files.
-
-The system used to build musl does not need to be Linux-based, nor do
-the Linux kernel headers need to be available.
-
-If support for dynamic linking is desired, some further requirements
-are placed on the compiler and linker. In particular, the linker must
-support the -Bsymbolic-functions option.
-
-At present, GCC 4.6 or later is the recommended compiler for building
-musl. Any earlier version of GCC with full C99 support should also
-work, but may be subject to minor floating point conformance issues on
-i386 targets. Sufficiently recent versions of PCC and LLVM/clang are
-also believed to work, but have not been tested as heavily; prior to
-Fall 2012, both had known bugs that affected musl. Firm/cparser is
-also believed to work but lacks support for producing shared
-libraries. GCC 4.9.0 and 4.9.1 are known to have a serious bug
-(#61144) which affects musl. Beginning with version 1.1.4 musl
-attempts to work around the bug, but these compiler versions are still
-considered unstable and unsupported.
-
-
-
-Supported Targets
------------------
-
-musl can be built for the following CPU instruction set architecture
-and ABI combinations:
-
-* i386
- * Minimum CPU model is actually 80486 unless kernel emulation of
- the `cmpxchg` instruction is added
-
-* x86_64
-
-* ARM
- * EABI, standard or hard-float VFP variant
- * Little-endian default; big-endian variants also supported
- * Compiler toolchains only support armv4t and later
-
-* MIPS
- * ABI is o32
- * Big-endian default; little-endian variants also supported
- * Default ABI variant uses FPU registers; alternate soft-float ABI
- that does not use FPU registers or instructions is available
- * MIPS2 or later, or kernel emulation of ll/sc (standard in Linux)
- is required
-
-* PowerPC
- * Only 32-bit is supported
- * Compiler toolchain must provide 64-bit long double, not IBM
- double-double or IEEE quad
- * For dynamic linking, compiler toolchain must be configured for
- "secure PLT" variant
-
-* Microblaze
- * Big-endian default; little-endian variants also supported
- * Soft-float
- * Requires support for lwx/swx instructions
-
-The following additional targets are available for build, but may not
-work correctly and may not yet have ABI stability:
-
-* SuperH (SH)
- * Little-endian by default; big-engian variant also supported
- * Full FPU ABI or soft-float ABI is supported, but the
- single-precision-only FPU ABI is not supported (musl always
- requires IEEE single and double to be supported)
-
-* x32 (x86_64 ILP32 ABI)
-
-
-
-Build and Installation Procedure
---------------------------------
-
-To build and install musl:
-
-1. Run the provided configure script from the top-level source
- directory, passing on its command line any desired options.
-
-2. Run "make" to compile.
-
-3. Run "make install" with appropriate privileges to write to the
- target locations.
-
-The configure script attempts to determine automatically the correct
-target architecture based on the compiler being used. For some
-compilers, this may not be possible. If detection fails or selects the
-wrong architecture, you can provide an explicit selection on the
-configure command line.
-
-By default, configure installs to a prefix of "/usr/local/musl". This
-differs from the behavior of most configure scripts, and is chosen
-specifically to avoid clashing with libraries already present on the
-system. DO NOT set the prefix to "/usr", "/usr/local", or "/" unless
-you're upgrading libc on an existing musl-based system. Doing so will
-break your existing system when you run "make install" and it may be
-difficult to recover.
-
-
-
-Notes on Dynamic Linking
-------------------------
-
-If dynamic linking is enabled, one file needs to be installed outside
-of the installation prefix: /lib/ld-musl-$ARCH.so.1. This is the
-dynamic linker. Its pathname is hard-coded into all dynamic-linked
-programs, so for the sake of being able to share binaries between
-systems, a consistent location should be used everywhere. Note that
-the same applies to glibc and its dynamic linker, which is named
-/lib/ld-linux.so.2 on i386 systems.
-
-If for some reason it is impossible to install the dynamic linker in
-its standard location (for example, if you are installing without root
-privileges), the --syslibdir option to configure can be used to
-provide a different location
-
-At runtime, the dynamic linker needs to know the paths to search for
-shared libraries. You should create a text file named
-/etc/ld-musl-$ARCH.path (where $ARCH matches the architecture name
-used in the dynamic linker) containing a list of directories where you
-want the dynamic linker to search for shared libraries, separated by
-colons or newlines. If the dynamic linker has been installed in a
-non-default location, the path file also needs to reside at that
-location (../etc relative to the chosen syslibdir).
-
-If you do not intend to use dynamic linking, you may disable it by
-passing --disable-shared to configure; this also cuts the build time
-in half.
-
-
-
-Checking for Successful Installation
-------------------------------------
-
-After installing, you should be able to use musl via the musl-gcc
-wrapper. For example:
-
-cat > hello.c <<EOF
-#include <stdio.h>
-int main()
-{
- printf("hello, world!\n");
- return 0;
-}
-EOF
-/usr/local/musl/bin/musl-gcc hello.c
-./a.out
-
-To configure autoconf-based program to compile and link against musl,
-set the CC variable to musl-gcc when running configure, as in:
-
-CC=musl-gcc ./configure ...
-
-You will probably also want to use --prefix when building libraries to
-ensure that they are installed under the musl prefix and not in the
-main host system library directories.
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