MSYS: Add support for running under MSYS runtime environment

Detect MSYS as CYGWIN, with the required adaptations.

5 files changed, 18 insertions, 5 deletions

diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index 938745c..c19c154 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -44,7 +44,7 @@ endif()
 if(NOT CMake_DEFAULT_RECURSION_LIMIT)
   if(DEFINED ENV{DASHBOARD_TEST_FROM_CTEST})
     set(CMake_DEFAULT_RECURSION_LIMIT 100)
-  elseif(MINGW)
+  elseif(MINGW OR MSYS)
     set(CMake_DEFAULT_RECURSION_LIMIT 400)
   elseif(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "IntelLLVM")
     set(CMake_DEFAULT_RECURSION_LIMIT 600)
diff --git a/Source/Checks/cm_cxx_features.cmake b/Source/Checks/cm_cxx_features.cmake
index 7917d41..f20572e 100644
--- a/Source/Checks/cm_cxx_features.cmake
+++ b/Source/Checks/cm_cxx_features.cmake
@@ -80,7 +80,9 @@ if(CMake_HAVE_CXX_MAKE_UNIQUE)
   set(CMake_HAVE_CXX_UNIQUE_PTR 1)
 endif()
 cm_check_cxx_feature(unique_ptr)
-if (NOT CMAKE_CXX_STANDARD LESS "17")
+if (NOT CMAKE_CXX_STANDARD LESS "17"
+    AND NOT MSYS # FIXME: RunCMake.cmake_path cases crash with MSYS std::filesystem
+    )
   if (NOT CMAKE_CROSSCOMPILING OR CMAKE_CROSSCOMPILING_EMULATOR)
     cm_check_cxx_feature(filesystem TRY_RUN)
   else()
diff --git a/Source/Modules/FindLibUUID.cmake b/Source/Modules/FindLibUUID.cmake
index 17f11c1..ca5b61d 100644
--- a/Source/Modules/FindLibUUID.cmake
+++ b/Source/Modules/FindLibUUID.cmake
@@ -40,7 +40,14 @@ They may be set by end users to point at LibUUID components.
 #]=======================================================================]
 
 #-----------------------------------------------------------------------------
-if(CYGWIN)
+if(MSYS)
+  # Note: on current version of MSYS2, linking to libuuid.dll.a doesn't
+  #       import the right symbols sometimes. Fix this by linking directly
+  #       to the DLL that provides the symbols, instead.
+  find_library(LibUUID_LIBRARY
+    NAMES msys-uuid-1.dll
+    )
+elseif(CYGWIN)
   # Note: on current version of Cygwin, linking to libuuid.dll.a doesn't
   #       import the right symbols sometimes. Fix this by linking directly
   #       to the DLL that provides the symbols, instead.
diff --git a/Source/cmExtraEclipseCDT4Generator.cxx b/Source/cmExtraEclipseCDT4Generator.cxx
index ccfd727..5fbbef7 100644
--- a/Source/cmExtraEclipseCDT4Generator.cxx
+++ b/Source/cmExtraEclipseCDT4Generator.cxx
@@ -655,7 +655,7 @@ void cmExtraEclipseCDT4Generator::CreateCProjectFile() const
     xml.EndElement(); // extension
   } else {
     std::string systemName = mf->GetSafeDefinition("CMAKE_SYSTEM_NAME");
-    if (systemName == "CYGWIN") {
+    if (systemName == "CYGWIN" || systemName == "MSYS") {
       xml.StartElement("extension");
       xml.Attribute("id", "org.eclipse.cdt.core.Cygwin_PE");
       xml.Attribute("point", "org.eclipse.cdt.core.BinaryParser");
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 5382fac..aad5533 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -3239,10 +3239,14 @@ cm::string_view cmSystemTools::GetSystemName()
       systemName = "kFreeBSD";
     }
 
-    // fix for CYGWIN which has windows version in it
+    // fix for CYGWIN and MSYS which have windows version in them
     if (systemName.find("CYGWIN") != cm::string_view::npos) {
       systemName = "CYGWIN";
     }
+
+    if (systemName.find("MSYS") != cm::string_view::npos) {
+      systemName = "MSYS";
+    }
     return systemName;
   }
   return "";