Consolidate GCC 10 installation steps into single script format

docs/manual-build.md

@@ -444,55 +444,36 @@ EOF
 
 #### Installation Steps
 
-1. **Update and Install Prerequisites:**
+**Complete installation script:**
 ```bash
+# Install prerequisites
 dnf -y install wget unzip lbzip2
 dnf -y groupinstall "Development Tools"
-   ```
 
-2. **Download GCC 10 Source Code:**
-   ```bash
+# Download and extract GCC 10 source
 cd /usr/local/src
 wget https://github.com/gcc-mirror/gcc/archive/refs/heads/releases/gcc-10.zip
-   ```
-
-3. **Extract Source Code:**
-   ```bash
 unzip gcc-10.zip
 cd gcc-releases-gcc-10
-   ```
 
-4. **Download Prerequisites:**
-   ```bash
+# Download GCC prerequisites (GMP, MPFR, MPC, ISL)
 contrib/download_prerequisites
-   ```
 
-5. **Create Installation Directory:**
-   ```bash
+# Create build directory and configure
 mkdir /usr/local/gcc-10
-   ```
-
-6. **Configure GCC Build:**
-   ```bash
 cd /usr/local/gcc-10
 /usr/local/src/gcc-releases-gcc-10/configure --disable-multilib
-   ```
 
-7. **Compile GCC:**
-   ```bash
+# Compile and install (1-2 hours depending on CPU)
 make -j $(nproc)
-   ```
-
-   > **Estimated time**: 1-2 hours depending on CPU performance
-
-8. **Install GCC:**
-   ```bash
 make install
 ```
 
-9. **Post-Install Configuration:**
+> **Note**: The compilation step `make -j $(nproc)` will take 1-2 hours depending on your CPU performance. The `$(nproc)` command uses all available CPU cores to speed up compilation.
+
+**Post-Install Configuration:**
 ```bash
-   # Create environment script
+# Create environment script for library paths
 cat > /etc/profile.d/gcc-10.sh << 'EOF'
 #!/bin/sh
 # gcc-10.sh - GCC 10 library path configuration
@@ -504,7 +485,7 @@ EOF
 ldconfig
 ```
 
-10. **Verify Installation:**
+**Verify Installation:**
 ```bash
 /usr/local/bin/gcc --version
 # Should output: gcc (GCC) 10.x.x