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# 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, nativeTools, nativeLibc, nativePrefix ? ""
, gcc ? null, libc ? null, binutils ? null, coreutils ? null, shell ? ""
, zlib ? null
}:
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;
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;
utils = ./utils.sh;
addFlags = ./add-flags;
inherit nativeTools nativeLibc nativePrefix gcc;
libc = if nativeLibc then null else libc;
binutils = if nativeTools then null else binutils;
# The wrapper scripts use 'cat', so we may need coreutils
coreutils = if nativeTools then null else 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 = if shell == "" then stdenv.shell else shell;
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 Linux platforms.
dynamicLinker =
if !nativeLibc then
(if stdenv.system == "i686-linux" then "ld-linux.so.2" else
if stdenv.system == "x86_64-linux" then "ld-linux-x86-64.so.2" else
if stdenv.system == "armv5tel-linux" then "ld-linux.so.3" else
if stdenv.system == "powerpc-linux" then "ld.so.1" else
if stdenv.system == "mips64-linux" then "ld.so.1" else
abort "don't know the name of the dynamic linker for this platform")
else "";
}
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