Merge flags (rust-lang#372)

Author: wsmoses

.packaging/build_tarballs.jl

@@ -31,6 +31,9 @@ CMAKE_FLAGS+=(-DLLVM_DIR="${prefix}/lib/cmake/llvm")
 CMAKE_FLAGS+=(-DLLVM_LINK_LLVM_DYLIB=ON)
 # Build the library
 CMAKE_FLAGS+=(-DBUILD_SHARED_LIBS=ON)
+if [[ "${target}" == *apple* ]]; then
+  CMAKE_FLAGS+=(-DCMAKE_CXX_FLAGS=-mmacosx-version-min=12)
+fi
 cmake -B build -S enzyme -GNinja ${CMAKE_FLAGS[@]}
 ninja -C build -j ${nproc} install
 """

enzyme/CMakeLists.txt

@@ -11,7 +11,7 @@ set(ENZYME_VERSION
   ${ENZYME_MAJOR_VERSION}.${ENZYME_MINOR_VERSION}.${ENZYME_PATCH_VERSION})
 
 
-SET(CMAKE_CXX_FLAGS "-Wall -fPIC -fno-rtti")
+SET(CMAKE_CXX_FLAGS "-Wall -fPIC -fno-rtti ${CMAKE_CXX_FLAGS}")
 SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g -ggdb")
 SET(CMAKE_CXX_FLAGS_RELEASE "-O2")