mac: pass explicit min deployment target
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a1ea88d..dc3c3f2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,13 @@
set(CMAKE_CXX_FLAGS "$CMAKE_CXX_FLAGS -fdiagnostics-color -Wall")
endif()
+# 10.9 chosen somewhat arbitrary; it's the first target where clang defaults
+# to libc++ and ld64 defaults to stripping __TEXT,__eh_frame.
+if (APPLE)
+ set(CMAKE_C_FLAGS "$CMAKE_C_FLAGS -mmacosx-version-min=10.9")
+ set(CMAKE_CXX_FLAGS "$CMAKE_CXX_FLAGS -mmacosx-version-min=10.9")
+endif()
+
# This is apparently the simplest way to statically link the CRT in CMake:
if (WIN32)
string(TOUPPER "${CMAKE_BUILD_TYPE}" build)
