pkgsLLVM.llvmPackages.compiler-rt: fix for RISC-V

compiler-rt includes <linux/unistd.h> on RISC-V.  This only seems to
be necessary for useLLVM, but looking at the source code I can't
see any reason for that, so probably in the non-useLLVM case it just
gets propagated in.

pkgs/development/compilers/llvm/12/compiler-rt/default.nix

@@ -1,4 +1,5 @@
-{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, xcbuild, libllvm, libcxxabi, libxcrypt
+{ lib, stdenv, llvm_meta, version, fetch
+, cmake, python3, xcbuild, libllvm, linuxHeaders, libcxxabi, libxcrypt
 , doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
 }:
 
@@ -18,7 +19,9 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake python3 libllvm.dev ]
     ++ lib.optional stdenv.isDarwin xcbuild.xcrun;
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
+  buildInputs =
+    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders
+    ++ lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
   env.NIX_CFLAGS_COMPILE = toString [
     "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"

pkgs/development/compilers/llvm/13/compiler-rt/default.nix

@@ -1,4 +1,5 @@
-{ lib, stdenv, llvm_meta, version, src, cmake, python3, xcbuild, libllvm, libcxxabi, libxcrypt
+{ lib, stdenv, llvm_meta, version, src
+, cmake, python3, xcbuild, libllvm, linuxHeaders, libcxxabi, libxcrypt
 , doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
 }:
 
@@ -20,7 +21,9 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake python3 libllvm.dev ]
     ++ lib.optional stdenv.isDarwin xcbuild.xcrun;
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
+  buildInputs =
+    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders
+    ++ lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
   env.NIX_CFLAGS_COMPILE = toString [
     "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"

pkgs/development/compilers/llvm/14/compiler-rt/default.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, llvm_meta, version
 , monorepoSrc, runCommand
-, cmake, python3, xcbuild, libllvm, libcxxabi, libxcrypt
+, cmake, python3, xcbuild, libllvm, linuxHeaders, libcxxabi, libxcrypt
 , doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
 }:
 
@@ -29,7 +29,9 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake python3 libllvm.dev ]
     ++ lib.optional stdenv.isDarwin xcbuild.xcrun;
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
+  buildInputs =
+    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders
+    ++ lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
   env.NIX_CFLAGS_COMPILE = toString [
     "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"

pkgs/development/compilers/llvm/15/compiler-rt/default.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, llvm_meta, version
 , monorepoSrc, runCommand
-, cmake, ninja, python3, xcbuild, libllvm, libcxxabi, libxcrypt
+, cmake, ninja, python3, xcbuild, libllvm, linuxHeaders, libcxxabi, libxcrypt
 , doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
 }:
 
@@ -29,7 +29,9 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake ninja python3 libllvm.dev ]
     ++ lib.optional stdenv.isDarwin xcbuild.xcrun;
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
+  buildInputs =
+    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders
+    ++ lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
   env.NIX_CFLAGS_COMPILE = toString [
     "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"

pkgs/development/compilers/llvm/16/compiler-rt/default.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, llvm_meta, version
 , monorepoSrc, runCommand
-, cmake, ninja, python3, xcbuild, libllvm, libcxxabi, libxcrypt
+, cmake, ninja, python3, xcbuild, libllvm, linuxHeaders, libcxxabi, libxcrypt
 , doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
 }:
 
@@ -30,7 +30,9 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake ninja python3 libllvm.dev ]
     ++ lib.optional stdenv.isDarwin xcbuild.xcrun;
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
+  buildInputs =
+    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders
+    ++ lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
   env.NIX_CFLAGS_COMPILE = toString ([
     "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"

pkgs/development/compilers/llvm/17/compiler-rt/default.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, llvm_meta, version
 , monorepoSrc, runCommand
-, cmake, ninja, python3, xcbuild, libllvm, libcxxabi, libxcrypt
+, cmake, ninja, python3, xcbuild, libllvm, linuxHeaders, libcxxabi, libxcrypt
 , doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
 }:
 
@@ -30,7 +30,9 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake ninja python3 libllvm.dev ]
     ++ lib.optional stdenv.isDarwin xcbuild.xcrun;
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
+  buildInputs =
+    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders
+    ++ lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
   env.NIX_CFLAGS_COMPILE = toString ([
     "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"

pkgs/development/compilers/llvm/git/compiler-rt/default.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, llvm_meta, version
 , monorepoSrc, runCommand
-, cmake, ninja, python3, xcbuild, libllvm, libcxxabi, libxcrypt
+, cmake, ninja, python3, xcbuild, libllvm, linuxHeaders, libcxxabi, libxcrypt
 , doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
 }:
 
@@ -30,7 +30,9 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake ninja python3 libllvm.dev ]
     ++ lib.optional stdenv.isDarwin xcbuild.xcrun;
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
+  buildInputs =
+    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders
+    ++ lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
   env.NIX_CFLAGS_COMPILE = toString ([
     "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"