Allow suppression of incompatible compiler warning (#2272)

* Add `ENZYME_WARN_COMPILER` option

* Conditionally warn in EnzymeConfig.cmake.in

* Conditionally warn in EnzymeConfigVersion.cmake.in

Author: dime10

enzyme/CMakeLists.txt

@@ -38,6 +38,7 @@ option(ENZYME_MLIR "Build enzyme mlir plugin" OFF)
 option(ENZYME_IFX "Enable enzyme support for the Intel Fortran compiler IFX" OFF)
 option(ENZYME_EXTERNAL_SHARED_LIB "Build external shared library" OFF)
 option(ENZYME_STATIC_LIB "Build static library" OFF)
+option(ENZYME_WARN_COMPILER "Warn if enzyme detects potentially incompatible compiler" ON)
 set(ENZYME_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 set(ENZYME_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
 list(APPEND CMAKE_MODULE_PATH "${ENZYME_SOURCE_DIR}/cmake/modules")

enzyme/cmake/EnzymeConfig.cmake.in

@@ -2,21 +2,23 @@
 
 get_property(languages GLOBAL PROPERTY ENABLED_LANGUAGES)
 
-if("C" IN_LIST languages)
-    if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
-        message("project languages: ${languages}")
-        message(WARNING "C compiler ID equals ${CMAKE_C_COMPILER_ID}\n"
-        "C compiler: ${CMAKE_C_COMPILER}\n"
-        "Using Enzyme without an LLVM based C compiler.")
+if(ENZYME_WARN_COMPILER)
+    if("C" IN_LIST languages)
+        if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
+            message("project languages: ${languages}")
+            message(WARNING "C compiler ID equals ${CMAKE_C_COMPILER_ID}\n"
+            "C compiler: ${CMAKE_C_COMPILER}\n"
+            "Using Enzyme without an LLVM based C compiler.")
+        endif()
     endif()
-endif()
 
-if("CXX" IN_LIST languages)
-    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        message("project languages: ${languages}")
-        message(WARNING "C++ compiler equals ${CMAKE_CXX_COMPILER_ID}\n"
-        "C++ compiler: ${CMAKE_CXX_COMPILER}\n"
-        "Using Enzyme without an LLVM based C++ compiler.")
+    if("CXX" IN_LIST languages)
+        if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+            message("project languages: ${languages}")
+            message(WARNING "C++ compiler equals ${CMAKE_CXX_COMPILER_ID}\n"
+            "C++ compiler: ${CMAKE_CXX_COMPILER}\n"
+            "Using Enzyme without an LLVM based C++ compiler.")
+        endif()
     endif()
 endif()
 

enzyme/cmake/EnzymeConfigVersion.cmake.in

@@ -2,21 +2,23 @@ set(PACKAGE_VERSION "@ENZYME_VERSION@")
 
 get_property(languages GLOBAL PROPERTY ENABLED_LANGUAGES)
 
-if("C" IN_LIST languages)
-    if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
-        message("project languages: ${languages}")
-        message(WARNING "C compiler ID equals ${CMAKE_C_COMPILER_ID}\n"
-        "C compiler: ${CMAKE_C_COMPILER}\n"
-        "Using Enzyme without an LLVM based C compiler.")
+if(ENZYME_WARN_COMPILER)
+    if("C" IN_LIST languages)
+        if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
+            message("project languages: ${languages}")
+            message(WARNING "C compiler ID equals ${CMAKE_C_COMPILER_ID}\n"
+            "C compiler: ${CMAKE_C_COMPILER}\n"
+            "Using Enzyme without an LLVM based C compiler.")
+        endif()
     endif()
-endif()
 
-if("CXX" IN_LIST languages)
-    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        message("project languages: ${languages}")
-        message(WARNING "C++ compiler equals ${CMAKE_CXX_COMPILER_ID}\n"
-        "C++ compiler: ${CMAKE_CXX_COMPILER}\n"
-        "Using Enzyme without an LLVM based C++ compiler.")
+    if("CXX" IN_LIST languages)
+        if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+            message("project languages: ${languages}")
+            message(WARNING "C++ compiler equals ${CMAKE_CXX_COMPILER_ID}\n"
+            "C++ compiler: ${CMAKE_CXX_COMPILER}\n"
+            "Using Enzyme without an LLVM based C++ compiler.")
+        endif()
     endif()
 endif()