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MSYS2 and similar MinGW/MSYS distributions define development
environments with a `MSYSTEM` environment variable. Each such
environment has a documented installation prefix for its packages,
often provided by a `MSYSTEM_PREFIX` environment variable.
Since commit 84a25fc263 (cmake_host_system_information: Add
MSYSTEM_PREFIX query, 2023-09-08) we can look up this prefix.
Add `$MSYSTEM_PREFIX/local` and `$MSYSTEM_PREFIX` to our system search
prefixes when targeting MinGW under `MSYSTEM` environments. This is
their equivalent to `/usr/local` and `/usr`, which we search by default
on UNIX systems.
Issue: #24216
6 lines
231 B
CMake
6 lines
231 B
CMake
set(ENV{MSYSTEM} "FAKEMSYS")
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set(ENV{MSYSTEM_PREFIX} "${CMAKE_CURRENT_LIST_DIR}/MSYSTEM_PREFIX")
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enable_language(C)
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find_library(MSYSTEM_PREFIX_LIB NAMES msystem_prefix)
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message(STATUS "MSYSTEM_PREFIX_LIB='${MSYSTEM_PREFIX_LIB}'")
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