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CMake: cxxopts: support building with distro-packaged dependency

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Many linux distros (e.g., Fedora) strongly discourage bundling or
vendoring dependencies. Many of them also include a `cxxopts-devel`
package. This patch adds support for un-vendoring `cxxopts` by:

   1. `libs/cxxopts` vendored submodule build conditional on
      `YOSYS_WITH_PKG_DEPS == OFF`

   2. use implicit `<cxxopts.hpp>` instead of explicit hard-coded
      path to vendored header file

   3. conditionally provide additional implicit include path to
      `cxxopts.hpp` and library dependency for `kernel/CMakeLists.txt`

Note that the current existing behavior remains the default.

Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
This commit is contained in:
Gabriel Somlo 2026-07-12 10:51:00 -04:00
parent 619b8edeb8
commit 45ecf0c419
3 changed files with 6 additions and 3 deletions
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2
kernel/driver.cc
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@ -21,7 +21,7 @@
#include "kernel/hashlib.h"
#include "libs/sha1/sha1.h"
#define CXXOPTS_VECTOR_DELIMITER '\0'
#include "libs/cxxopts/include/cxxopts.hpp"
#include <cxxopts.hpp>
#include <iostream>
#include <chrono>