#11891 Allow disabling the Homebrew dependency search path

Summary

Meta/CMake/compile_options.cmake unconditionally adds /opt/homebrew to CMAKE_PREFIX_PATH on Apple platforms.

When building through Nix on a machine with Homebrew installed, CMake selected JPEG, PNG, and OpenSSL from /opt/homebrew instead of the dependencies supplied by Nix. This makes dependency selection depend on the host machine.

Would you consider a CMake option to disable this behavior? For example:

option(ENABLE_HOMEBREW_SEARCH "Search for dependencies in Homebrew" ON)

if (APPLE)
    if (ENABLE_HOMEBREW_SEARCH)
        list(APPEND CMAKE_PREFIX_PATH /opt/homebrew)
    endif()
     add_cxx_link_options(LINKER:-dead_strip)
 endif()

This would preserve the existing default while letting package managers pass -DENABLE_HOMEBREW_SEARCH=OFF.

Is there an existing preferred way to opt out? Any other ideas that would help this "issue" would be greatly appreciated instead of having to create .patch files :)

Operating system

macOS

Steps to reproduce

Have a Mac with nix package manager
Try building this PR

Expected behavior

Preferably no forced requirement for homebrew

Actual behavior

Homebrew requirement resulting in warnings like these:

ld: warning: dylib (/opt/homebrew/lib/libcrypto.dylib) was built for newer macOS version (26.0) than being linked (15.4)
ld: warning: dylib (/opt/homebrew/lib/libjpeg.dylib) was built for newer macOS version (26.0) than being linked (15.4)
ld: warning: dylib (/opt/homebrew/lib/libpng.dylib) was built for newer macOS version (26.0) than being linked (15.4)

URL for a reduced test case

N/A

HTML/SVG/etc. source for a reduced test case

N/A

Log output and (if possible) backtrace

ld: warning: dylib (/opt/homebrew/lib/libcrypto.dylib) was built for newer macOS version (26.0) than being linked (15.4)
ld: warning: dylib (/opt/homebrew/lib/libjpeg.dylib) was built for newer macOS version (26.0) than being linked (15.4)
ld: warning: dylib (/opt/homebrew/lib/libpng.dylib) was built for newer macOS version (26.0) than being linked (15.4)

Screenshots or screen recordings

No response

Build flags or config settings

No response