Upgrade to GCC 13 for full C++20 support

Ubuntu 22.04's default GCC 11 has incomplete C++20 support (constexpr
std::string, std::ranges). Install GCC 13 from Ubuntu Toolchain PPA
which has full C++20 support matching macOS/Clang behavior.

Co-Authored-By: Claude (global.anthropic.claude-opus-4-5-20251101-v1:0) <noreply@anthropic.com>

Author: JackStrohm-asana

Dockerfile.Fibers

@@ -5,10 +5,16 @@ FROM ubuntu:22.04 AS base
 ENV DEBIAN_FRONTEND=noninteractive
 
 # Install necessary dependencies
+# Install GCC 13 from Ubuntu Toolchain PPA for full C++20 support
 RUN apt-get update
 RUN apt-get install -y software-properties-common
+RUN add-apt-repository -y ppa:ubuntu-toolchain-r/test
 RUN apt-get update
-RUN apt-get install -y build-essential python3 python3-distutils g++ make curl git pkg-config libssl-dev libffi-dev libgmp-dev libtool autoconf automake cmake wget xz-utils unzip vim
+RUN apt-get install -y build-essential python3 python3-distutils gcc-13 g++-13 make curl git pkg-config libssl-dev libffi-dev libgmp-dev libtool autoconf automake cmake wget xz-utils unzip vim
+
+# Set GCC 13 as the default compiler
+RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-13 100
+RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-13 100
 
 # Copy local Node.js source into the image
 WORKDIR /usr/src/node

Dockerfile.Node24

@@ -6,11 +6,17 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 # Install necessary dependencies
 # Ubuntu 22.04 has Python 3.10 which meets Node.js v24 requirement (3.9+)
+# Install GCC 13 from Ubuntu Toolchain PPA for full C++20 support
 RUN apt-get update
 RUN apt-get install -y software-properties-common
-RUN apt-get update && apt-get install -y build-essential python3 python3-distutils g++ make curl git pkg-config libssl-dev libffi-dev libgmp-dev libtool autoconf automake cmake wget xz-utils unzip vim
+RUN add-apt-repository -y ppa:ubuntu-toolchain-r/test
+RUN apt-get update && apt-get install -y build-essential python3 python3-distutils gcc-13 g++-13 make curl git pkg-config libssl-dev libffi-dev libgmp-dev libtool autoconf automake cmake wget xz-utils unzip vim
 RUN rm -rf /var/lib/apt/lists/*
 
+# Set GCC 13 as the default compiler
+RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-13 100
+RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-13 100
+
 # Copy local Node.js source into the image
 WORKDIR /usr/src/node
 COPY . .

Dockerfile.Packages

@@ -5,10 +5,16 @@ FROM ubuntu:22.04 AS base
 ENV DEBIAN_FRONTEND=noninteractive
 
 # Install necessary dependencies
+# Install GCC 13 from Ubuntu Toolchain PPA for full C++20 support
 RUN apt-get update
 RUN apt-get install -y software-properties-common
+RUN add-apt-repository -y ppa:ubuntu-toolchain-r/test
 RUN apt-get update
-RUN apt-get install -y build-essential python3 python3-distutils g++ make curl git pkg-config libssl-dev libffi-dev libgmp-dev libtool autoconf automake cmake wget xz-utils unzip vim
+RUN apt-get install -y build-essential python3 python3-distutils gcc-13 g++-13 make curl git pkg-config libssl-dev libffi-dev libgmp-dev libtool autoconf automake cmake wget xz-utils unzip vim
+
+# Set GCC 13 as the default compiler
+RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-13 100
+RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-13 100
 
 # Copy local Node.js source into the image
 WORKDIR /usr/src/node