updating README

quaddtype/README.md

@@ -25,28 +25,18 @@ np.array([1,2,3], dtype=QuadPrecDType("longdouble"))
 
 ## Installation from source
 
-The code needs the quad precision pieces of the sleef library, which is not available on most systems by default, so we have to generate that first. Choose the appropriate section below based on your operating system.
-
-### Linux/Unix/macOS
+#### Prerequisites
 
-The below assumes one has the required pieces to build sleef (cmake and libmpfr-dev), and that one is in the package directory locally.
+- **gcc/clang**
+- **CMake** (≥3.15)
+- **Python 3.10+**
+- **Git**
 
-```bash
-git clone --branch 3.8 https://github.com/shibatch/sleef.git
-cd sleef
-cmake -S . -B build -DSLEEF_BUILD_QUAD:BOOL=ON -DSLEEF_BUILD_SHARED_LIBS:BOOL=ON -DCMAKE_POSITION_INDEPENDENT_CODE=ON
-cmake --build build/ --clean-first -j
-cd ..
-```
+### Linux/Unix/macOS
 
 Building the `numpy-quaddtype` package from locally installed sleef:
 
 ```bash
-export SLEEF_DIR=$PWD/sleef/build
-export LIBRARY_PATH=$SLEEF_DIR/lib
-export C_INCLUDE_PATH=$SLEEF_DIR/include
-export CPLUS_INCLUDE_PATH=$SLEEF_DIR/include
-
 # setup the virtual env
 python3 -m venv temp
 source temp/bin/activate
@@ -55,15 +45,13 @@ source temp/bin/activate
 pip install meson-python numpy pytest
 
 # If you see errors about a missing atomics library, you might need -latomic
-export LDFLAGS="-Wl,-rpath,$SLEEF_DIR/lib -fopenmp -lpthread"
-export CFLAGS="-fPIC"
-export CXXFLAGS="-fPIC"
+export LDFLAGS="-fopenmp -lpthread"
 
 # To build without QBLAS (default for MSVC)
-# export CFLAGS="-fPIC -DDISABLE_QUADBLAS"
-# export CXXFLAGS="-fPIC -DDISABLE_QUADBLAS"
+# export CFLAGS="-DDISABLE_QUADBLAS"
+# export CXXFLAGS="-DDISABLE_QUADBLAS"
 
-python -m pip install . -v --no-build-isolation -Cbuilddir=build -C'compile-args=-v'
+python -m pip install . -v --no-build-isolation
 
 # Run the tests
 cd ..
@@ -76,7 +64,7 @@ python -m pytest
 
 - **Visual Studio 2017 or later** (with MSVC compiler)
 - **CMake** (≥3.15)
-- **Python 3.10+** 
+- **Python 3.10+**
 - **Git**
 
 #### Step-by-Step Installation
@@ -85,24 +73,7 @@ python -m pytest
 
    Open a **Developer Command Prompt for VS** or **Developer PowerShell for VS** to ensure MSVC is properly configured.
 
-2. **Clone and Build SLEEF**
-
-   ```powershell
-   # Clone SLEEF library
-   git clone --branch 3.8 https://github.com/shibatch/sleef.git
-   cd sleef
-
-   # Configure with CMake for Windows
-   cmake -S . -B build -G "Visual Studio 17 2022" -A x64 -DSLEEF_BUILD_QUAD:BOOL=ON -DSLEEF_BUILD_SHARED_LIBS:BOOL=ON -DCMAKE_POSITION_INDEPENDENT_CODE=ON
-
-   # Build and install SLEEF
-   cmake --build build --config Release
-   cmake --install build --prefix "C:/sleef" --config Release
-
-   cd ..
-   ```
-
-3. **Setup Python Environment**
+2. **Setup Python Environment**
 
    ```powershell
    # Create and activate virtual environment
@@ -114,46 +85,33 @@ python -m pytest
    pip install meson-python numpy pytest ninja meson
    ```
 
-4. **Set Environment Variables**
+3. **Set Environment Variables**
 
    ```powershell
-   # Set up paths and compiler flags
-   $env:INCLUDE = "C:/sleef/include;$env:INCLUDE"
-   $env:LIB = "C:/sleef/lib;$env:LIB"
-   $env:PATH = "C:/sleef/bin;$env:PATH"
-
    # Note: QBLAS is disabled on Windows due to MSVC compatibility issues
-   $env:CFLAGS = "/IC:/sleef/include /DDISABLE_QUADBLAS"
-   $env:CXXFLAGS = "/IC:/sleef/include /DDISABLE_QUADBLAS"
-   $env:LDFLAGS = "C:/sleef/lib/sleef.lib C:/sleef/lib/sleefquad.lib"
+   $env:CFLAGS = "/DDISABLE_QUADBLAS"
+   $env:CXXFLAGS = "/DDISABLE_QUADBLAS"
    ```
 
-5. **Build and Install numpy-quaddtype**
+4. **Build and Install numpy-quaddtype**
 
    ```powershell
-   # Ensure submodules are initialized
-   git submodule update --init --recursive
-
    # Build and install the package
-   python -m pip install . -v --no-build-isolation -Cbuilddir=build -C'compile-args=-v'
+   python -m pip install . -v --no-build-isolation
    ```
 
-6. **Test Installation**
+5. **Test Installation**
 
    ```powershell
    # Run tests
    pytest -s tests/
    ```
 
-1. **QBLAS Disabled**: QuadBLAS optimization is automatically disabled on Windows builds due to MSVC compatibility issues. This is handled by the `-DDISABLE_QUADBLAS` compiler flag.
+6. **QBLAS Disabled**: QuadBLAS optimization is automatically disabled on Windows builds due to MSVC compatibility issues. This is handled by the `-DDISABLE_QUADBLAS` compiler flag.
+
+7. **Visual Studio Version**: The instructions assume Visual Studio 2022. For other versions, adjust the generator string:
 
-2. **Visual Studio Version**: The instructions assume Visual Studio 2022. For other versions, adjust the generator string:
    - VS 2019: `"Visual Studio 16 2019"`
    - VS 2017: `"Visual Studio 15 2017"`
 
-3. **Architecture**: The instructions are for x64. For x86 builds, change `-A x64` to `-A Win32`.
-
-4. **Alternative SLEEF Location**: If you prefer to install SLEEF elsewhere, update all path references accordingly.
-
-#### Windows Troubleshooting
-- **Link errors**: Verify that `sleef.lib` and `sleefquad.lib` exist in `C:/sleef/lib/`
+8. **Architecture**: The instructions are for x64. For x86 builds, change `-A x64` to `-A Win32`.