nixpkgs/pkgs/development/compilers/halide/nix.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ba384324..7e23038f7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -75,10 +75,10 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
 
 set(LLVM_VERSION "${LLVM_VERSION_MAJOR}${LLVM_VERSION_MINOR}")
 
-file(TO_NATIVE_PATH "${LLVM_TOOLS_BINARY_DIR}/llvm-as${CMAKE_EXECUTABLE_SUFFIX}" LLVM_AS)
-file(TO_NATIVE_PATH "${LLVM_TOOLS_BINARY_DIR}/llvm-nm${CMAKE_EXECUTABLE_SUFFIX}" LLVM_NM)
-file(TO_NATIVE_PATH "${LLVM_TOOLS_BINARY_DIR}/clang${CMAKE_EXECUTABLE_SUFFIX}" CLANG)
-file(TO_NATIVE_PATH "${LLVM_TOOLS_BINARY_DIR}/llvm-config${CMAKE_EXECUTABLE_SUFFIX}" LLVM_CONFIG)
+find_program(LLVM_AS llvm-as HINTS ${LLVM_TOOLS_BINARY_DIR})
+find_program(LLVM_NM llvm-nm HINTS ${LLVM_TOOLS_BINARY_DIR})
+find_program(CLANG clang HINTS ${LLVM_TOOLS_BINARY_DIR})
+find_program(LLVM_CONFIG llvm-config HINTS ${LLVM_TOOLS_BINARY_DIR})
 
 # LLVM doesn't appear to expose --system-libs via its CMake interface,
 # so we must shell out to llvm-config to find this info
diff --git a/apps/linear_algebra/CMakeLists.txt b/apps/linear_algebra/CMakeLists.txt
index 132c80e6a..36ce865f2 100644
--- a/apps/linear_algebra/CMakeLists.txt
+++ b/apps/linear_algebra/CMakeLists.txt
@@ -26,7 +26,7 @@ if (CBLAS_FOUND)
   #  Atlas requires also linking against its provided libcblas for cblas symbols
   set(ATLAS_EXTRA_LIBS cblas) # XXX fragile
   set(OpenBLAS_EXTRA_LIBS)
-  set(BLAS_VENDORS OpenBLAS ATLAS)
+  set(BLAS_VENDORS OpenBLAS)
 
   # TODO
   # there are more vendors we could add here that support the cblas interface
@@ -41,6 +41,7 @@ if (CBLAS_FOUND)
       message(STATUS " ${BLAS_VENDOR}: Missing")
     else()
       message(STATUS " ${BLAS_VENDOR}: Found")
+      set(BLAS_LIBRARIES "${BLAS_LIBRARIES}" CACHE FILEPATH "BLAS library to use")
       list(APPEND BLAS_VENDORS ${NAME})
     endif()
   endforeach()
diff --git a/apps/linear_algebra/tests/CMakeLists.txt b/apps/linear_algebra/tests/CMakeLists.txt
index cc02eb0a4..c20419a0d 100644
--- a/apps/linear_algebra/tests/CMakeLists.txt
+++ b/apps/linear_algebra/tests/CMakeLists.txt
@@ -19,7 +19,7 @@ target_compile_options(test_halide_blas PRIVATE -Wno-unused-variable)
 target_link_libraries(test_halide_blas
   PRIVATE
    halide_blas
-   cblas # XXX fragile
+   ${BLAS_LIBRARIES}
    ${HALIDE_COMPILER_LIB}
 )
 
-- 
2.23.0