nixpkgs/pkgs/build-support/gcc-wrapper-old/default.nix
John Ericson 6c74ee68b9 cc-wrapper, cc-wrapper-old: Simplify shell logic
1. `crossDrv` is now the default so we don't need to worry about that in
   build != host builds.

2. shell is the build time shell, so `wrapCCCross` doesn't need to
   worry, as build == host.

3. `shell.shellPath` will always be appended where useful.

4. Complicated `shell == ""` logic served no purpose.
2017-09-19 16:45:24 -04:00

100 lines
4.1 KiB
Nix

# The Nix `gcc' stdenv.mkDerivation is not directly usable, since it doesn't
# know where the C library and standard header files are. Therefore
# the compiler produced by that package cannot be installed directly
# in a user environment and used from the command line. This
# stdenv.mkDerivation provides a wrapper that sets up the right environment
# variables so that the compiler and the linker just "work".
{ name ? "", stdenv, lib, nativeTools, nativeLibc, nativePrefix ? ""
, gcc ? null, libc ? null, binutils ? null, coreutils ? null, shell ? stdenv.shell
, zlib ? null
, hostPlatform, targetPlatform
}:
assert nativeTools -> nativePrefix != "";
assert !nativeTools -> gcc != null && binutils != null && coreutils != null;
assert !nativeLibc -> libc != null;
# For ghdl (the vhdl language provider to gcc) we need zlib in the wrapper
assert (gcc != null && gcc ? langVhdl && gcc.langVhdl) -> zlib != null;
let
gccVersion = (builtins.parseDrvName gcc.name).version;
gccName = (builtins.parseDrvName gcc.name).name;
langGo = if nativeTools then false else gcc ? langGo && gcc.langGo;
in
stdenv.mkDerivation {
name =
(if name != "" then name else gccName + "-wrapper") +
(if gcc != null && gccVersion != "" then "-" + gccVersion else "");
builder = ./builder.sh;
setupHook = ./setup-hook.sh;
gccWrapper = ./gcc-wrapper.sh;
gnatWrapper = ./gnat-wrapper.sh;
gnatlinkWrapper = ./gnatlink-wrapper.sh;
ldWrapper = ./ld-wrapper.sh;
ldSolarisWrapper = ./ld-solaris-wrapper.sh;
utils = ./utils.sh;
addFlags = ./add-flags;
inherit nativeTools nativeLibc nativePrefix gcc;
gcc_lib = lib.getLib gcc;
libc = if nativeLibc then null else libc;
libc_dev = if nativeLibc then null else lib.getDev libc;
libc_bin = if nativeLibc then null else lib.getBin libc;
binutils = if nativeTools then null else lib.getBin binutils;
# The wrapper scripts use 'cat', so we may need coreutils
coreutils = if nativeTools then null else lib.getBin coreutils;
langC = if nativeTools then true else gcc.langC;
langCC = if nativeTools then true else gcc.langCC;
langFortran = if nativeTools then false else gcc ? langFortran;
langAda = if nativeTools then false else gcc ? langAda && gcc.langAda;
langVhdl = if nativeTools then false else gcc ? langVhdl && gcc.langVhdl;
zlib = if gcc != null && gcc ? langVhdl then zlib else null;
shell = shell + shell.shellPath or "";
crossAttrs = {
#
# This is not the best way to do this. I think the reference should be
# the style in the gcc-cross-wrapper, but to keep a stable stdenv now I
# do this sufficient if/else.
dynamicLinker =
(if hostPlatform.arch == "arm" then "ld-linux.so.3" else
if hostPlatform.arch == "mips" then "ld.so.1" else
if stdenv.lib.hasSuffix "pc-gnu" hostPlatform.config then "ld.so.1" else
abort "don't know the name of the dynamic linker for this platform");
};
preferLocalBuild = true;
meta =
let gcc_ = if gcc != null then gcc else {}; in
(if gcc_ ? meta then removeAttrs gcc.meta ["priority"] else {}) //
{ description =
stdenv.lib.attrByPath ["meta" "description"] "System C compiler" gcc_
+ " (wrapper script)";
};
# The dynamic linker has different names on different platforms.
dynamicLinker =
if !nativeLibc then
(if targetPlatform.system == "i686-linux" then "ld-linux.so.2" else
if targetPlatform.system == "x86_64-linux" then "ld-linux-x86-64.so.2" else
# ARM with a wildcard, which can be "" or "-armhf".
if targetPlatform.isArm then "ld-linux*.so.3" else
if targetPlatform.system == "aarch64-linux" then "ld-linux-aarch64.so.1" else
if targetPlatform.system == "powerpc-linux" then "ld.so.1" else
if targetPlatform.system == "mips64el-linux" then "ld.so.1" else
if targetPlatform.system == "x86_64-darwin" then "/usr/lib/dyld" else
if stdenv.lib.hasSuffix "pc-gnu" targetPlatform.config then "ld.so.1" else
builtins.trace
"Don't know the name of the dynamic linker for platform ${targetPlatform.config}, so guessing instead."
null)
else "";
}