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Document Mac Rosetta issue #116

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Document Mac Rosetta issue #116

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20 changes: 20 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,26 @@ if(NOT DEFINED PROJECT_VERSION)
set(PROJECT_VERSION 1.0.0)
endif()

# Check for and warn if running under Rosetta
if(APPLE)
execute_process(
COMMAND sysctl -in sysctl.proc_translated
OUTPUT_VARIABLE MACOS_TRANSLATED
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET
)

if(MACOS_TRANSLATED)
message(
WARNING
"CMake is running under Rosetta. "
"This may cause the project to be built for x86_64 instead of arm64. "
"Run CMake natively under Apple Silicon or explicitly pass "
"-DCMAKE_OSX_ARCHITECTURES=arm64"
)
endif()
endif()

project(mcpp VERSION ${PROJECT_VERSION})

set(CMAKE_CXX_STANDARD 17)
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5 changes: 5 additions & 0 deletions README.md
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Expand Up @@ -39,6 +39,11 @@ git clone https://github.com/rozukke/mcpp.git && cd mcpp
cmake -B build && cd build
sudo make install
```

On an M-series Mac, you may encounter: `found architecture 'x86_64', required architecture 'arm64'`.
This means `cmake` is running under Rosetta. You can fix this by adding `-DCMAKE_OSX_ARCHITECTURES=arm64` after `cmake -B build`.
But you should fix the root cause by ensuring your `cmake` or `brew` installs are not the intel x86 versions.

- After doing this, the library should be accessible via a `#include <mcpp/mcpp.h>` directive.
- When compiling code using the library, use the flag `-lmcpp` for Makefiles or `target_link_libraries(your_executable mcpp)` for CMake.

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