CppCon 2024 Customizing Compilation Error Messages Formatting a Compile-Time String During Substitution Failure Patrick Roberts, P.E. Principal Software Engineer 1CppCon 2024 What problem does

CPPCON / 16TH SEPTEMBER 2020 CPPCON / 16TH SEPTEMBER 2020 JUST-IN-TIME COMPILATION: JUST-IN-TIME COMPILATION: THE NEXT BIG THING? THE NEXT BIG THING? BEN DEANE & KRIS JUSIAK - BEN DEANE & KRIS JUSIAK THE COMPILER... (/LIBRARY) IS THE COMPILER... JUST-IN-TIME (JIT) IS COMPILATION AT THE POINT OF NEED JUST-IN-TIME (JIT) IS COMPILATION AT THE POINT OF NEED 3 . 2WHAT IS JITTING? WHAT IS JITTING? INSTEAD THE COMPILER... (/LIBRARY) IS THE COMPILER... JUST-IN-TIME (JIT) IS COMPILATION AT THE POINT OF NEED JUST-IN-TIME (JIT) IS COMPILATION AT THE POINT OF NEED IT'S LIKE THE APPLICATION (/LIBRARY) IS THE COMPILER

build systems ■ xmake ■ bazel 2Outline 1. What are compilation databases? 2. How do modules change the status quo? 3. Build databases 3Compilation Databases: Overview ● JSON document ● Array of JSON file (optional) ○ Arguments (list of strings) or command (single string, shell escaped) 4Today: Compilation Databases ● Specified by the Clang project ○ https://clang.llvm.org/docs/JSONCompilationDatabase IDEs to understand how a source is used (e.g., highlighting the right side of an #if block) 5Compilation Databases: Example { "directory": "/path/to/build", "command": "/usr/lib64/ccache/c++ FLAG_SOUP

Just-in-Time Compilation A lecture on the last 60 years JF Bastien Software architect @jfbastien Presented at CppCon 2020. Just-in-Time compilers... we've all heard of them! What are they really on the screen than usual, from these papers. First, some definitions.JiT JiT Just-in-Time compilation With some artistic liberty, folks usually think of JIT as: The executable code changes after On modern systems: pages mapped X at some point in time are modified.AoT AoT Ahead-of-Time compilation Is AoT the opposite of JiT? C and C++ are pretty much AoT these days: compile code to a target

Accumulation and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431 33.3 Options for controlling the display of profile results . . . . . . . . . . . . . . . . . . 431 33.4 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1613 82 Memory-mapped I/O 1615 83 Network Options 1618 84 Pkg 1622 85 Printf 1626 86 Profiling 1629 86.1 CPU Profiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1896 105.25 Ahead of Time Compilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1913 105.26 Static analyzer annotations

Accumulation and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431 33.3 Options for controlling the display of profile results . . . . . . . . . . . . . . . . . . 431 33.4 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1613 82 Memory-mapped I/O 1615 83 Network Options 1618 84 Pkg 1622 85 Printf 1626 86 Profiling 1629 86.1 CPU Profiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1896 105.25 Ahead of Time Compilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1913 105.26 Static analyzer annotations

Accumulation and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431 33.3 Options for controlling the display of profile results . . . . . . . . . . . . . . . . . . 431 33.4 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1613 82 Memory-mapped I/O 1615 83 Network Options 1618 84 Pkg 1622 85 Printf 1626 86 Profiling 1629 86.1 CPU Profiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1896 105.25 Ahead of Time Compilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1913 105.26 Static analyzer annotations

Accumulation and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 436 33.3 Options for controlling the display of profile results . . . . . . . . . . . . . . . . . . 436 33.4 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1674 84 Memory-mapped I/O 1677 85 Network Options 1680 86 Pkg 1684 87 Printf 1688 88 Profiling 1691 88.1 CPU Profiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1947 106.25 Ahead of Time Compilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1963 106.26 Static analyzer annotations

Accumulation and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435 33.3 Options for controlling the display of profile results . . . . . . . . . . . . . . . . . . 435 33.4 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1673 84 Memory-mapped I/O 1676 85 Network Options 1679 86 Pkg 1683 87 Printf 1687 88 Profiling 1690 88.1 CPU Profiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1947 106.25 Ahead of Time Compilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1963 106.26 Static analyzer annotations

Accumulation and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435 33.3 Options for controlling the display of profile results . . . . . . . . . . . . . . . . . . 435 33.4 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1673 84 Memory-mapped I/O 1676 85 Network Options 1679 86 Pkg 1683 87 Printf 1687 88 Profiling 1690 88.1 CPU Profiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1947 106.25 Ahead of Time Compilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1963 106.26 Static analyzer annotations