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authorKaren Arutyunov <karen@codesynthesis.com>2016-08-30 19:50:41 +0300
committerKaren Arutyunov <karen@codesynthesis.com>2016-08-30 19:50:41 +0300
commit2adca26721d5e6c73f1bf75a2cb16fddce591dcc (patch)
treecabb2fa6025b7ff85df1229a7fb059fa3bedd6d0 /print/export
parent926050227af570ab57201de16e952b21dd9c0d34 (diff)
Build infrastructure update
Diffstat (limited to 'print/export')
-rw-r--r--print/export36
1 files changed, 36 insertions, 0 deletions
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+// file: print/export -*- C++ -*-
+
+#pragma once
+
+// 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.
+
+#if defined(LIBPRINT_STATIC) // Using static.
+# define LIBPRINT_EXPORT
+#elif defined(LIBPRINT_STATIC_BUILD) // Building static.
+# define LIBPRINT_EXPORT
+#elif defined(LIBPRINT_SHARED) // Using shared.
+# ifdef _WIN32
+# define LIBPRINT_EXPORT __declspec(dllimport)
+# else
+# define LIBPRINT_EXPORT
+# endif
+#elif defined(LIBPRINT_SHARED_BUILD) // Building shared.
+# ifdef _WIN32
+# define LIBPRINT_EXPORT __declspec(dllexport)
+# else
+# define LIBPRINT_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 LIBPRINT_EXPORT // Using static or shared.
+#endif