Only use __declspec(dllimport/dllexport) for MSVC compiler

Use the gcc visibility attributes when building with the MinGW compiler(gcc).
GCC also supports the __declspec syntax but it will not compile at the moment
until the issues(which may not even be exactly the same issues as with MSVC)
are resolved.

7 files changed, 7 insertions, 42 deletions

diff --git a/libs/ardour/ardour/libardour_visibility.h b/libs/ardour/ardour/libardour_visibility.h
index a41afca14d..917307732c 100644
--- a/libs/ardour/ardour/libardour_visibility.h
+++ b/libs/ardour/ardour/libardour_visibility.h
@@ -20,12 +20,7 @@
 #ifndef __libardour_libardour_visibility_h__
 #define __libardour_libardour_visibility_h__
 
-/* _WIN32 is defined by most compilers targetting Windows, but within the
- * ardour source tree, we also define COMPILER_MSVC or COMPILER_MINGW depending
- * on how a Windows build is built.
- */
-
-#if defined _WIN32 || defined __CYGWIN__ || defined(COMPILER_MSVC) || defined(COMPILER_MINGW)
+#if defined(COMPILER_MSVC)
   #define LIBARDOUR_DLL_IMPORT __declspec(dllimport)
   #define LIBARDOUR_DLL_EXPORT __declspec(dllexport)
   #define LIBARDOUR_DLL_LOCAL
diff --git a/libs/audiographer/audiographer/visibility.h b/libs/audiographer/audiographer/visibility.h
index 72ce50bd25..31a7511f8b 100644
--- a/libs/audiographer/audiographer/visibility.h
+++ b/libs/audiographer/audiographer/visibility.h
@@ -20,12 +20,7 @@
 #ifndef __libaudiographer_visibility_h__
 #define __libaudiographer_visibility_h__
 
-/* _WIN32 is defined by most compilers targetting Windows, but within the
- * audiographer source tree, we also define COMPILER_MSVC or COMPILER_MINGW depending
- * on how a Windows build is built.
- */
-
-#if defined _WIN32 || defined __CYGWIN__ || defined(COMPILER_MSVC) || defined(COMPILER_MINGW)
+#if defined(COMPILER_MSVC)
   #define LIBAUDIOGRAPHER_DLL_IMPORT __declspec(dllimport)
   #define LIBAUDIOGRAPHER_DLL_EXPORT __declspec(dllexport)
   #define LIBAUDIOGRAPHER_DLL_LOCAL
diff --git a/libs/evoral/evoral/visibility.h b/libs/evoral/evoral/visibility.h
index 17c0b7730b..fc6d23a401 100644
--- a/libs/evoral/evoral/visibility.h
+++ b/libs/evoral/evoral/visibility.h
@@ -20,12 +20,7 @@
 #ifndef __libevoral_visibility_h__
 #define __libevoral_visibility_h__
 
-/* _WIN32 is defined by most compilers targetting Windows, but within the
- * evoral source tree, we also define COMPILER_MSVC or COMPILER_MINGW depending
- * on how a Windows build is built.
- */
-
-#if defined _WIN32 || defined __CYGWIN__ || defined(COMPILER_MSVC) || defined(COMPILER_MINGW)
+#if defined(COMPILER_MSVC)
   #define LIBEVORAL_DLL_IMPORT __declspec(dllimport)
   #define LIBEVORAL_DLL_EXPORT __declspec(dllexport)
   #define LIBEVORAL_DLL_LOCAL
diff --git a/libs/gtkmm2ext/gtkmm2ext/visibility.h b/libs/gtkmm2ext/gtkmm2ext/visibility.h
index 5a5fce3e8c..902e94d779 100644
--- a/libs/gtkmm2ext/gtkmm2ext/visibility.h
+++ b/libs/gtkmm2ext/gtkmm2ext/visibility.h
@@ -20,12 +20,7 @@
 #ifndef __libgtkmm2ext_visibility_h__
 #define __libgtkmm2ext_visibility_h__
 
-/* _WIN32 is defined by most compilers targetting Windows, but within the
- * gtkmm2ext source tree, we also define COMPILER_MSVC or COMPILER_MINGW depending
- * on how a Windows build is built.
- */
-
-#if defined _WIN32 || defined __CYGWIN__ || defined(COMPILER_MSVC) || defined(COMPILER_MINGW)
+#if defined(COMPILER_MSVC)
   #define LIBGTKMM2EXT_DLL_IMPORT __declspec(dllimport)
   #define LIBGTKMM2EXT_DLL_EXPORT __declspec(dllexport)
   #define LIBGTKMM2EXT_DLL_LOCAL
diff --git a/libs/midi++2/midi++/libmidi_visibility.h b/libs/midi++2/midi++/libmidi_visibility.h
index 51b061bdd8..17b57045cf 100644
--- a/libs/midi++2/midi++/libmidi_visibility.h
+++ b/libs/midi++2/midi++/libmidi_visibility.h
@@ -20,12 +20,7 @@
 #ifndef __libmidi_libmidi_visibility_h__
 #define __libmidi_libmidi_visibility_h__
 
-/* _WIN32 is defined by most compilers targetting Windows, but within the
- * midi source tree, we also define COMPILER_MSVC or COMPILER_MINGW depending
- * on how a Windows build is built.
- */
-
-#if defined _WIN32 || defined __CYGWIN__ || defined(COMPILER_MSVC) || defined(COMPILER_MINGW)
+#if defined(COMPILER_MSVC)
   #define LIBMIDIPP_DLL_IMPORT __declspec(dllimport)
   #define LIBMIDIPP_DLL_EXPORT __declspec(dllexport)
   #define LIBMIDIPP_DLL_LOCAL
diff --git a/libs/pbd/pbd/libpbd_visibility.h b/libs/pbd/pbd/libpbd_visibility.h
index 84a64c351a..0fcebd554f 100644
--- a/libs/pbd/pbd/libpbd_visibility.h
+++ b/libs/pbd/pbd/libpbd_visibility.h
@@ -20,12 +20,7 @@
 #ifndef __libpbd_libpbd_visibility_h__
 #define __libpbd_libpbd_visibility_h__
 
-/* _WIN32 is defined by most compilers targetting Windows, but within the
- * ardour source tree, we also define COMPILER_MSVC or COMPILER_MINGW depending
- * on how a Windows build is built.
- */
-
-#if defined _WIN32 || defined __CYGWIN__ || defined(COMPILER_MSVC) || defined(COMPILER_MINGW)
+#if defined(COMPILER_MSVC)
   #define LIBPBD_DLL_IMPORT __declspec(dllimport)
   #define LIBPBD_DLL_EXPORT __declspec(dllexport)
   #define LIBPBD_DLL_LOCAL
diff --git a/libs/surfaces/control_protocol/control_protocol/visibility.h b/libs/surfaces/control_protocol/control_protocol/visibility.h
index 418fb6d2b3..88dcff0940 100644
--- a/libs/surfaces/control_protocol/control_protocol/visibility.h
+++ b/libs/surfaces/control_protocol/control_protocol/visibility.h
@@ -20,12 +20,7 @@
 #ifndef __libcontrolcp_visibility_h__
 #define __libcontrolcp_visibility_h__
 
-/* _WIN32 is defined by most compilers targetting Windows, but within the
- * controlcp source tree, we also define COMPILER_MSVC or COMPILER_MINGW depending
- * on how a Windows build is built.
- */
-
-#if defined _WIN32 || defined __CYGWIN__ || defined(COMPILER_MSVC) || defined(COMPILER_MINGW)
+#if defined(COMPILER_MSVC)
   #define LIBCONTROLCP_DLL_IMPORT __declspec(dllimport)
   #define LIBCONTROLCP_DLL_EXPORT __declspec(dllexport)
   #define LIBCONTROLCP_DLL_LOCAL