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yosys/cmake/UseHomebrew.cmake
Mohamed Gaber f5f930e186
cmake: use homebrew from PATH
The current version of UseHomebrew defaults to /opt/homebrew/Cellar and prioritizes it over anything currently existing in PATH. This has two issues:

- On x86_64 installations of Homebrew (including when emulating on ARM), the path is /usr/local/Cellar
- When building in a `nix develop` environment, the homebrew versions take priority, complicating testing

This addresses this issue by using the output of `brew --prefix`, doing nothing if brew is not in `PATH`.

Additionally, CMakeLists.txt was updated such that if YOSYS_ENABLE_HOMEBREW is defined as OFF, using Homebrew is skipped entirely.
2026-08-10 22:55:57 +03:00

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CMake

# Syntax:
#
# use_homebrew([ROOT <root>])
#
# Includes all packages installed in `<root>` (output of brew --prefix if not
# specified) in `CMAKE_FIND_ROOT_PATH`.
#
function(use_homebrew)
cmake_parse_arguments(PARSE_ARGV 0 arg "" "ROOT" "")
if (NOT arg_ROOT)
execute_process(
COMMAND brew --prefix
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
RESULT_VARIABLE brew_prefix_result
OUTPUT_VARIABLE brew_prefix_out
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET
)
if (${brew_prefix_result} EQUAL 0)
set (arg_ROOT "${brew_prefix_out}/Cellar")
endif()
endif()
if (NOT arg_ROOT)
# unset and no brew binary available
return()
endif()
file(GLOB package_roots ${arg_ROOT}/*/*) # e.g. `/opt/homebrew/Cellar/bison/3.8.2/`
foreach (package_root ${package_roots})
if (IS_DIRECTORY ${package_root})
list(APPEND CMAKE_FIND_ROOT_PATH ${package_root})
endif()
endforeach()
return(PROPAGATE CMAKE_FIND_ROOT_PATH)
endfunction()