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authorBoris Kolpackov <boris@codesynthesis.com>2023-04-13 13:55:00 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2023-04-13 13:55:00 +0200
commit894813b993963de006d0a8aa7480b0403daaa87a (patch)
treebfc4f5a57da17089f93da5035e1d156b5adebd54 /libbuild2/cli/export.hxx
parente9a3804c2ea5972dd84a7d4759d4ea965c2490fb (diff)
Move cli module to libbuild2-cli library
This is a temporary measure (until we unboundle this module) needed for in-process configure support in bpkg.
Diffstat (limited to 'libbuild2/cli/export.hxx')
-rw-r--r--libbuild2/cli/export.hxx37
1 files changed, 37 insertions, 0 deletions
diff --git a/libbuild2/cli/export.hxx b/libbuild2/cli/export.hxx
new file mode 100644
index 0000000..67c1eb9
--- /dev/null
+++ b/libbuild2/cli/export.hxx
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+// file : libbuild2/cli/export.hxx -*- C++ -*-
+// license : MIT; see accompanying LICENSE file
+
+#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 functions being
+// used before their inline definition. The workaround is to reorder code. In
+// the end it's all trial and error.
+
+#if defined(LIBBUILD2_CLI_STATIC) // Using static.
+# define LIBBUILD2_CLI_SYMEXPORT
+#elif defined(LIBBUILD2_CLI_STATIC_BUILD) // Building static.
+# define LIBBUILD2_CLI_SYMEXPORT
+#elif defined(LIBBUILD2_CLI_SHARED) // Using shared.
+# ifdef _WIN32
+# define LIBBUILD2_CLI_SYMEXPORT __declspec(dllimport)
+# else
+# define LIBBUILD2_CLI_SYMEXPORT
+# endif
+#elif defined(LIBBUILD2_CLI_SHARED_BUILD) // Building shared.
+# ifdef _WIN32
+# define LIBBUILD2_CLI_SYMEXPORT __declspec(dllexport)
+# else
+# define LIBBUILD2_CLI_SYMEXPORT
+# 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 LIBBUILD2_CLI_SYMEXPORT // Using static or shared.
+#endif