Add initial support for build2 build

1 files changed, 39 insertions, 0 deletions

diff --git a/cutl/details/export.hxx b/cutl/details/export.hxx
index f9f764f..c6c9f39 100644
--- a/cutl/details/export.hxx
+++ b/cutl/details/export.hxx
@@ -7,6 +7,43 @@
 
 #include <cutl/details/config.hxx>
 
+// Normally we don't export class templates (but do complete specializations),
+// inline functions, and classes with only inline member functions. Exporting
+// classes that inherit from non-exported/imported bases (e.g., std::string)
+// will end up badly. The only known workarounds are to not inherit or to not
+// export. Also, MinGW GCC doesn't like seeing non-exported function being
+// used before their inline definition. The workaround is to reorder code. In
+// the end it's all trial and error.
+
+#ifdef LIBCUTL_BUILD2
+
+#if defined(LIBCUTL_STATIC)         // Using static.
+#  define LIBCUTL_EXPORT
+#elif defined(LIBCUTL_STATIC_BUILD) // Building static.
+#  define LIBCUTL_EXPORT
+#elif defined(LIBCUTL_SHARED)       // Using shared.
+#  ifdef _WIN32
+#    define LIBCUTL_EXPORT __declspec(dllimport)
+#  else
+#    define LIBCUTL_EXPORT
+#  endif
+#elif defined(LIBCUTL_SHARED_BUILD) // Building shared.
+#  ifdef _WIN32
+#    define LIBCUTL_EXPORT __declspec(dllexport)
+#  else
+#    define LIBCUTL_EXPORT
+#  endif
+#else
+// If none of the above macros are defined, then we assume we are being used
+// by some third-party build system that cannot/doesn't signal the library
+// type. Note that this fallback works for both static and shared but in case
+// of shared will be sub-optimal compared to having dllimport.
+//
+#  define LIBCUTL_EXPORT            // Using static or shared.
+#endif
+
+#else // LIBCUTL_BUILD2
+
 #ifdef LIBCUTL_STATIC_LIB
 #  define LIBCUTL_EXPORT
 #else
@@ -33,4 +70,6 @@
 #  endif
 #endif
 
+#endif // LIBCUTL_BUILD2
+
 #endif // CUTL_DETAILS_EXPORT_HXX