1 files changed, 141 insertions, 0 deletions
diff --git a/pkgs/build-support/alternatives/blas/default.nix b/pkgs/build-support/alternatives/blas/default.nix
new file mode 100644
index 00000000000..bdee6688a74
--- /dev/null
+++ b/pkgs/build-support/alternatives/blas/default.nix
@@ -0,0 +1,141 @@
+{ lib, stdenv
+, lapack-reference, openblasCompat, openblas
+, isILP64 ? false
+, blasProvider ? if isILP64 then openblas else openblasCompat }:
+
+let
+  blasFortranSymbols = [
+    "caxpy" "ccopy" "cdotc" "cdotu" "cgbmv" "cgemm" "cgemv" "cgerc" "cgeru"
+    "chbmv" "chemm" "chemv" "cher" "cher2" "cher2k" "cherk" "chpmv" "chpr"
+    "chpr2" "crotg" "cscal" "csrot" "csscal" "cswap" "csymm" "csyr2k" "csyrk"
+    "ctbmv" "ctbsv" "ctpmv" "ctpsv" "ctrmm" "ctrmv" "ctrsm" "ctrsv" "dasum"
+    "daxpy" "dcabs1" "dcopy" "ddot" "dgbmv" "dgemm" "dgemv" "dger" "dnrm2"
+    "drot" "drotg" "drotm" "drotmg" "dsbmv" "dscal" "dsdot" "dspmv" "dspr"
+    "dspr2" "dswap" "dsymm" "dsymv" "dsyr" "dsyr2" "dsyr2k" "dsyrk" "dtbmv"
+    "dtbsv" "dtpmv" "dtpsv" "dtrmm" "dtrmv" "dtrsm" "dtrsv" "dzasum" "dznrm2"
+    "icamax" "idamax" "isamax" "izamax" "lsame" "sasum" "saxpy" "scabs1"
+    "scasum" "scnrm2" "scopy" "sdot" "sdsdot" "sgbmv" "sgemm" "sgemv"
+    "sger" "snrm2" "srot" "srotg" "srotm" "srotmg" "ssbmv" "sscal" "sspmv"
+    "sspr" "sspr2" "sswap" "ssymm" "ssymv" "ssyr" "ssyr2" "ssyr2k" "ssyrk"
+    "stbmv" "stbsv" "stpmv" "stpsv" "strmm" "strmv" "strsm" "strsv" "xerbla"
+    "xerbla_array" "zaxpy" "zcopy" "zdotc" "zdotu" "zdrot" "zdscal" "zgbmv"
+    "zgemm" "zgemv" "zgerc" "zgeru" "zhbmv" "zhemm" "zhemv" "zher" "zher2"
+    "zher2k" "zherk" "zhpmv" "zhpr" "zhpr2" "zrotg" "zscal" "zswap" "zsymm"
+    "zsyr2k" "zsyrk" "ztbmv" "ztbsv" "ztpmv" "ztpsv" "ztrmm" "ztrmv" "ztrsm"
+    "ztrsv"
+  ];
+
+  version = "3";
+  canonicalExtension = if stdenv.hostPlatform.isLinux
+                       then "${stdenv.hostPlatform.extensions.sharedLibrary}.${version}"
+                       else stdenv.hostPlatform.extensions.sharedLibrary;
+
+
+  isILP64 = blasProvider.blas64 or false;
+  blasImplementation = lib.getName blasProvider;
+
+in
+
+assert isILP64 -> (blasImplementation == "openblas" && blasProvider.blas64) || blasImplementation == "mkl";
+
+stdenv.mkDerivation {
+  pname = "blas";
+  inherit version;
+
+  outputs = [ "out" "dev" ];
+
+  meta = (blasProvider.meta or {}) // {
+    description = "${lib.getName blasProvider} with just the BLAS C and FORTRAN ABI";
+  };
+
+  passthru = {
+    inherit isILP64;
+    provider = blasProvider;
+    implementation = blasImplementation;
+  };
+
+  dontBuild = true;
+  dontConfigure = true;
+  unpackPhase = "src=$PWD";
+
+  dontPatchELF = true;
+
+  installPhase = (''
+  mkdir -p $out/lib $dev/include $dev/lib/pkgconfig
+
+  libblas="${lib.getLib blasProvider}/lib/libblas${canonicalExtension}"
+
+  if ! [ -e "$libblas" ]; then
+    echo "$libblas does not exist, ${blasProvider.name} does not provide libblas."
+    exit 1
+  fi
+
+  nm -an "$libblas" | cut -f3 -d' ' > symbols
+  for symbol in ${toString blasFortranSymbols}; do
+    grep "^$symbol_$" symbols || { echo "$symbol" was not found in "$libblas"; exit 1; }
+  done
+
+  cp -L "$libblas" $out/lib/libblas${canonicalExtension}
+  chmod +w $out/lib/libblas${canonicalExtension}
+
+'' + (if stdenv.hostPlatform.parsed.kernel.execFormat.name == "elf" then ''
+  patchelf --set-soname libblas${canonicalExtension} $out/lib/libblas${canonicalExtension}
+  patchelf --set-rpath "$(patchelf --print-rpath $out/lib/libblas${canonicalExtension}):${lib.getLib blasProvider}/lib" $out/lib/libblas${canonicalExtension}
+'' else if stdenv.hostPlatform.isDarwin then ''
+  install_name_tool \
+    -id libblas${canonicalExtension} \
+    -add_rpath ${lib.getLib blasProvider}/lib \
+    $out/lib/libblas${canonicalExtension}
+'' else "") + ''
+
+  if [ "$out/lib/libblas${canonicalExtension}" != "$out/lib/libblas${stdenv.hostPlatform.extensions.sharedLibrary}" ]; then
+    ln -s $out/lib/libblas${canonicalExtension} "$out/lib/libblas${stdenv.hostPlatform.extensions.sharedLibrary}"
+  fi
+
+  cat <<EOF > $dev/lib/pkgconfig/blas.pc
+Name: blas
+Version: ${version}
+Description: BLAS FORTRAN implementation
+Libs: -L$out/lib -lblas
+Cflags: -I$dev/include
+EOF
+
+  libcblas="${lib.getLib blasProvider}/lib/libcblas${canonicalExtension}"
+
+  if ! [ -e "$libcblas" ]; then
+    echo "$libcblas does not exist, ${blasProvider.name} does not provide libcblas."
+    exit 1
+  fi
+
+  cp -L "$libcblas" $out/lib/libcblas${canonicalExtension}
+  chmod +w $out/lib/libcblas${canonicalExtension}
+
+'' + (if stdenv.hostPlatform.parsed.kernel.execFormat.name == "elf" then ''
+  patchelf --set-soname libcblas${canonicalExtension} $out/lib/libcblas${canonicalExtension}
+  patchelf --set-rpath "$(patchelf --print-rpath $out/lib/libcblas${canonicalExtension}):${lib.getLib blasProvider}/lib" $out/lib/libcblas${canonicalExtension}
+'' else if stdenv.hostPlatform.isDarwin then ''
+  install_name_tool \
+    -id libcblas${canonicalExtension} \
+    -add_rpath ${lib.getLib blasProvider}/lib \
+    $out/lib/libcblas${canonicalExtension}
+'' else "") + ''
+  if [ "$out/lib/libcblas${canonicalExtension}" != "$out/lib/libcblas${stdenv.hostPlatform.extensions.sharedLibrary}" ]; then
+    ln -s $out/lib/libcblas${canonicalExtension} "$out/lib/libcblas${stdenv.hostPlatform.extensions.sharedLibrary}"
+  fi
+
+  cp ${lib.getDev lapack-reference}/include/cblas{,_mangling}.h $dev/include
+
+  cat <<EOF > $dev/lib/pkgconfig/cblas.pc
+Name: cblas
+Version: ${version}
+Description: BLAS C implementation
+Cflags: -I$dev/include
+Libs: -L$out/lib -lcblas
+EOF
+'' + stdenv.lib.optionalString (blasImplementation == "mkl") ''
+  mkdir -p $out/nix-support
+  echo 'export MKL_INTERFACE_LAYER=${lib.optionalString isILP64 "I"}LP64,GNU' > $out/nix-support/setup-hook
+  ln -s $out/lib/libblas${canonicalExtension} $out/lib/libmkl_rt${stdenv.hostPlatform.extensions.sharedLibrary}
+  ln -sf ${blasProvider}/include/* $dev/include
+'');
+}