### OpenSSL Perftools Build and Run Commands

Source: https://github.com/openssl/perftools/blob/main/source/CMakeLists.txt

Instructions for compiling the performance tools and executing the generated binaries.

```APIDOC
Build and Run Commands:

Build in default (Debug) mode:

	cmake --build ./build

Build in Release mode (for multi-configuration generators like Visual Studio):

	cmake --build ./build --config Release

Running Executables:

All compiled programs are located in the build directory (e.g., ./build/).

Example:

       ./build/randbytes 10

This command would execute the 'randbytes' tool with an argument of '10'.
```

--------------------------------

### OpenSSL CMake Configuration Modes

Source: https://github.com/openssl/perftools/blob/main/source/CMakeLists.txt

Guides on configuring CMake to find and use OpenSSL installations, detailing Module mode and Config mode with specific CMake variable settings.

```APIDOC
OpenSSL CMake Configuration:

This section outlines how to configure the build process to use your desired OpenSSL installation.

1. Module Mode:
   - Used by default when CMake's Find<Package>.cmake scripts are available.
   - To use system or /usr/local installations: No special variables needed.
   - To use custom installations (e.g., $HOME/.local): Set CMAKE_PREFIX_PATH or OPENSSL_ROOT_DIR.
     - Example (Linux/macOS): cmake -S . -B ./build -DCMAKE_PREFIX_PATH=$HOME/.local/opt/openssl-3.2
     - Example (Linux/macOS): cmake -S . -B ./build -DOPENSSL_ROOT_DIR=$HOME/.local/opt/openssl-3.2
     - Example (Windows): cmake -S . -B ./build -DOPENSSL_ROOT_DIR=c:\\Users\\your\\openssl.root

2. Config Mode:
   - Supported by OpenSSL 3.3+ and used when Module mode fails or is explicitly forced.
   - Requires setting OPENSSL_CONFIG_MODE to a true value (e.g., 1, YES).
   - CMAKE_PREFIX_PATH may still be needed for custom or uninstalled builds.
     - Example (System): cmake -S . -B ./build -DOPENSSL_CONFIG_MODE=1
     - Example (Custom Install): cmake -S . -B ./build -DOPENSSL_CONFIG_MODE=1 -DCMAKE_PREFIX_PATH=$HOME/.local/opt/openssl-3.3
     - Example (Uninstalled Build): cmake -S . -B ./build -DOPENSSL_CONFIG_MODE=1 -DCMAKE_PREFIX_PATH=$HOME/tmp/openssl-3.3-build

32-bit Builds on Windows:
   - Add -DCMAKE_GENERATOR_PLATFORM=Win32 to the CMake command line.
   - Ensure a 32-bit OpenSSL library is available at the specified OPENSSL_ROOT_DIR.
```

--------------------------------

### OpenSSL Perftools CMake Configuration

Source: https://github.com/openssl/perftools/blob/main/source/CMakeLists.txt

This CMakeLists.txt file defines the build process for the OpenSSL perftools. It handles finding OpenSSL, linking libraries, and creating various executables.

```cmake
cmake_minimum_required(VERSION 3.10)
project(perf-tools)

find_package(Threads)
link_libraries(${CMAKE_THREAD_LIBS_INIT})

# OpenSSL 3.3 and on have config mode files.
if(OPENSSL_CONFIG_MODE)
    set(OPENSSL_CONFIG_MODE CONFIG)
else()
    unset(OPENSSL_CONFIG_MODE)
endif()
find_package(OpenSSL REQUIRED ${OPENSSL_CONFIG_MODE})

add_library(perf perflib/perfhelper.c perflib/perfsslhelper.c perflib/threads.c
	perflib/time.c)

if (WIN32)
    target_sources(perf PRIVATE perflib/getopt.c perflib/basename.c)
endif()

target_include_directories(perf PUBLIC "${PROJECT_SOURCE_DIR}")
target_link_libraries(perf PUBLIC OpenSSL::SSL OpenSSL::Crypto)

if( OPENSSL_VERSION VERSION_GREATER_EQUAL 3 )
    add_executable(evp_fetch evp_fetch.c)
    target_link_libraries(evp_fetch PRIVATE perf)

    add_executable(providerdoall providerdoall.c)
    target_link_libraries(providerdoall PRIVATE perf)
endif()

add_executable(randbytes randbytes.c)
target_link_libraries(randbytes PRIVATE perf)

add_executable(handshake handshake.c)
target_link_libraries(handshake PRIVATE perf)

add_executable(sslnew sslnew.c)
target_link_libraries(sslnew PRIVATE perf)

add_executable(newrawkey newrawkey.c)
target_link_libraries(newrawkey PRIVATE perf)

add_executable(rsasign rsasign.c)
target_link_libraries(rsasign PRIVATE perf)

add_executable(x509storeissuer x509storeissuer.c)
target_link_libraries(x509storeissuer PRIVATE perf)

add_executable(rwlocks rwlocks.c)
target_link_libraries(rwlocks PRIVATE perf)

add_executable(pkeyread pkeyread.c)
target_link_libraries(pkeyread PRIVATE perf)

add_executable(evp_setpeer evp_setpeer.c)
target_link_libraries(evp_setpeer PRIVATE perf)

add_executable(writeread writeread.c)
target_link_libraries(writeread PRIVATE perf)
```

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