54 lines
2 KiB
Nix
54 lines
2 KiB
Nix
# The Nix `gcc' stdenv.mkDerivation is not directly usable, since it doesn't
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# know where the C library and standard header files are. Therefore
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# the compiler produced by that package cannot be installed directly
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# in a user environment and used from the command line. This
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# stdenv.mkDerivation provides a wrapper that sets up the right environment
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# variables so that the compiler and the linker just "work".
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{ name ? "gcc-wrapper", stdenv, nativeTools, nativeLibc, nativePrefix ? ""
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, gcc ? null, libc ? null, binutils ? null, shell ? ""
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}:
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assert nativeTools -> nativePrefix != "";
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assert !nativeTools -> gcc != null && binutils != null;
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assert !nativeLibc -> libc != null;
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let gccVersion = (builtins.parseDrvName gcc.name).version; in
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stdenv.mkDerivation {
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name = name + (if gcc != null && gccVersion != "" then "-" + gccVersion else "");
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builder = ./builder.sh;
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setupHook = ./setup-hook.sh;
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gccWrapper = ./gcc-wrapper.sh;
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ldWrapper = ./ld-wrapper.sh;
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utils = ./utils.sh;
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addFlags = ./add-flags;
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inherit nativeTools nativeLibc nativePrefix gcc;
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libc = if nativeLibc then null else libc;
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binutils = if nativeTools then null else binutils;
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langC = if nativeTools then true else gcc.langC;
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langCC = if nativeTools then true else gcc.langCC;
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langFortran = if nativeTools then false else gcc ? langFortran;
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shell = if shell == "" then stdenv.shell else shell;
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meta =
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if gcc != null && (gcc ? meta) then
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removeAttrs gcc.meta ["priority"] //
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{ description = gcc.meta.description + " (wrapper script)";
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}
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else
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{ description = "System C compiler (wrapper script)";
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};
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# The dynamic linker has different names on different Linux platforms.
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dynamicLinker =
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if !nativeLibc then
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(if stdenv.system == "i686-linux" then "ld-linux.so.2" else
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if stdenv.system == "x86_64-linux" then "ld-linux-x86-64.so.2" else
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if stdenv.system == "powerpc-linux" then "ld.so.1" else
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abort "don't know the name of the dynamic linker for this platform")
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else "";
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}
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