LLVM: Always pass host/target info to compiler-rt/libstdcxxClang

2 files changed, 55 insertions, 6 deletions

diff --git a/pkgs/development/compilers/llvm/6/compiler-rt.nix b/pkgs/development/compilers/llvm/6/compiler-rt.nix
index b3b6e86fc525..1bdba107d7dd 100644
--- a/pkgs/development/compilers/llvm/6/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/6/compiler-rt.nix
@@ -1,5 +1,13 @@
 { stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
-with stdenv.lib;
+
+let
+
+  useLLVM = stdenv.hostPlatform.useLLVM or false;
+  bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
+  inherit (stdenv.hostPlatform) isMusl;
+
+in
+
 stdenv.mkDerivation {
   pname = "compiler-rt";
   inherit version;
@@ -8,15 +16,38 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ cmake python3 llvm ];
   buildInputs = stdenv.lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
-  configureFlags = [
+  NIX_CFLAGS_COMPILE = [
+    "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"
+  ];
+
+  cmakeFlags = [
     "-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
+    "-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
+    "-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
+  ] ++ stdenv.lib.optionals (useLLVM || bareMetal || isMusl) [
+    "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
+    "-DCOMPILER_RT_BUILD_XRAY=OFF"
+    "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
+    "-DCOMPILER_RT_BUILD_PROFILE=OFF"
+  ] ++ stdenv.lib.optionals (useLLVM || bareMetal) [
+    "-DCMAKE_C_COMPILER_WORKS=ON"
+    "-DCMAKE_CXX_COMPILER_WORKS=ON"
+    "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
+    "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
+  ] ++ stdenv.lib.optionals (useLLVM) [
+    "-DCOMPILER_RT_BUILD_BUILTINS=ON"
+    "-DCMAKE_C_FLAGS=-nodefaultlibs"
+    #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
+    "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
+  ] ++ stdenv.lib.optionals (bareMetal) [
+    "-DCOMPILER_RT_OS_DIR=baremetal"
   ];
 
   outputs = [ "out" "dev" ];
 
   patches = [
     ./compiler-rt-codesign.patch # Revert compiler-rt commit that makes codesign mandatory
-  ] ++ optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch;
+  ] ++ stdenv.lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch;
 
   # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
   # to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
@@ -26,11 +57,23 @@ stdenv.mkDerivation {
   postPatch = stdenv.lib.optionalString stdenv.isDarwin ''
     substituteInPlace cmake/config-ix.cmake \
       --replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
+  '' + stdenv.lib.optionalString (useLLVM) ''
+    substituteInPlace lib/builtins/int_util.c \
+      --replace "#include <stdlib.h>" ""
+    substituteInPlace lib/builtins/clear_cache.c \
+      --replace "#include <assert.h>" ""
+    substituteInPlace lib/builtins/cpu_model.c \
+      --replace "#include <assert.h>" ""
   '';
 
   # Hack around weird upsream RPATH bug
-  postInstall = stdenv.lib.optionalString stdenv.isDarwin ''
+  postInstall = stdenv.lib.optionalString (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isWasm) ''
     ln -s "$out/lib"/*/* "$out/lib"
+  '' + stdenv.lib.optionalString (useLLVM) ''
+    ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/linux/crtbegin.o
+    ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/linux/crtend.o
+    ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/linux/crtbeginS.o
+    ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/linux/crtendS.o
   '';
 
   enableParallelBuilding = true;
diff --git a/pkgs/development/compilers/llvm/6/default.nix b/pkgs/development/compilers/llvm/6/default.nix
index ba704f972c31..b544a4f6ba69 100644
--- a/pkgs/development/compilers/llvm/6/default.nix
+++ b/pkgs/development/compilers/llvm/6/default.nix
@@ -1,4 +1,4 @@
-{ lowPrio, newScope, pkgs, stdenv, cmake, libstdcxxHook
+{ lowPrio, newScope, pkgs, stdenv, cmake, gcc, libstdcxxHook
 , libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
@@ -7,6 +7,7 @@
 let
   release_version = "6.0.1";
   version = release_version; # differentiating these is important for rc's
+  targetConfig = stdenv.targetPlatform.config;
 
   fetch = name: sha256: fetchurl {
     url = "https://releases.llvm.org/${release_version}/${name}-${version}.src.tar.xz";
@@ -56,7 +57,12 @@ let
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
-      extraBuildCommands = mkExtraBuildCommands cc;
+      extraBuildCommands = ''
+          echo "-target ${targetConfig}" >> $out/nix-support/cc-cflags
+          echo "-B${gcc.cc}/lib/gcc/${targetConfig}/${gcc.version}" >> $out/nix-support/cc-cflags
+          echo "-L${gcc.cc}/lib/gcc/${targetConfig}/${gcc.version}" >> $out/nix-support/cc-ldflags
+          echo "-L${gcc.cc.lib}/${targetConfig}/lib" >> $out/nix-support/cc-ldflags
+      '' + mkExtraBuildCommands cc;
     };
 
     libcxxClang = wrapCCWith rec {