Remove MinGW support

In OOo times, there'd originally been efforts to allow building on Windows with
MinGW.  Later, in LO times, this has been shifted to an attempt of cross-
compiling for Windows on Linux.  That attempt can be considered abandoned, and
the relevant code rotting.

Due to this heritage, there are now three kinds of MinGW-specific code in LO:

* Code from the original OOo native Windows effort that is no longer relevant
for the LO cross-compilation effort, but has never been removed properly.

* Code from the original OOo native Windows effort that is re-purposed for the
LO cross-compilation effort.

* Code that has been added specifially for the LO cross-compilation effort.

All three kinds of code are removed.

(An unrelated, remaining use of MinGW is for --enable-build-unowinreg, utilizing
--with-mingw-cross-compiler, MINGWCXX, and MINGWSTRIP.)

Change-Id: I49daad8669b4cbe49fa923050c4a4a6ff7dda568
Reviewed-on: https://gerrit.libreoffice.org/34127
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

10 files changed, 13 insertions, 184 deletions

diff --git a/sal/osl/w32/dllentry.c b/sal/osl/w32/dllentry.c
index d336e70810c1..670592b3a600 100644
--- a/sal/osl/w32/dllentry.c
+++ b/sal/osl/w32/dllentry.c
@@ -47,17 +47,6 @@
 extern CRITICAL_SECTION g_ThreadKeyListCS;
 extern oslMutex         g_Mutex;
 
-#ifdef __MINGW32__
-
-typedef void (*func_ptr) (void);
-extern func_ptr __CTOR_LIST__[];
-extern func_ptr __DTOR_LIST__[];
-
-static void do_startup(void);
-static void do_cleanup(void);
-
-#else
-
 /*
 This is needed because DllMain is called after static constructors. A DLL's
 startup and shutdown sequence looks like this:
@@ -75,73 +64,6 @@ _pRawDllMain()
 static BOOL WINAPI RawDllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved );
 BOOL (WINAPI *_pRawDllMain)(HINSTANCE, DWORD, LPVOID) = RawDllMain;
 
-#endif
-
-#ifdef __MINGW32__
-
-void
-__do_global_dtors (void)
-{
-  static func_ptr *p = __DTOR_LIST__ + 1;
-
-  /*
-   * Call each destructor in the destructor list until a null pointer
-   * is encountered.
-   */
-  while (*p)
-    {
-      (*(p)) ();
-      p++;
-    }
-}
-
-void
-__do_global_ctors (void)
-{
-  sal_uIntPtr nptrs = (sal_uIntPtr) __CTOR_LIST__[0];
-  unsigned i;
-
-  /*
-   * If the first entry in the constructor list is -1 then the list
-   * is terminated with a null entry. Otherwise the first entry was
-   * the number of pointers in the list.
-   */
-  if (nptrs == (sal_uIntPtr)-1)
-    {
-      for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++)
-    ;
-    }
-
-  /*
-   * Go through the list backwards calling constructors.
-   */
-  for (i = nptrs; i >= 1; i--)
-    {
-      __CTOR_LIST__[i] ();
-    }
-
-  /*
-   * Register the destructors for processing on exit.
-   */
-  atexit (__do_global_dtors);
-}
-
-static int initialized = 0;
-
-void
-__main (void)
-{
-  if (!initialized)
-    {
-      initialized = 1;
-      do_startup();
-      __do_global_ctors ();
-    }
-}
-
-static void do_startup( void )
-{
-#else
 static BOOL WINAPI RawDllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
 {
     (void)hinstDLL; /* avoid warnings */
@@ -166,7 +88,6 @@ static BOOL WINAPI RawDllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvRe
                     _set_error_mode(_OUT_TO_STDERR);
                 }
 #endif
-#endif
 
 #if OSL_DEBUG_LEVEL < 2
                 /* Suppress file error messages from system like "Floppy A: not inserted" */
@@ -185,19 +106,10 @@ static BOOL WINAPI RawDllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvRe
                 //We disable floating point exceptions. This is the usual state at program startup
                 //but on Windows 98 and ME this is not always the case.
                 _control87(_MCW_EM, _MCW_EM);
-#ifdef __MINGW32__
-        atexit(do_cleanup);
-}
-
-void do_cleanup( void )
-{
-#else
                 break;
             }
 
         case DLL_PROCESS_DETACH:
-#endif
-
             WSACleanup( );
 
             TlsFree( g_dwTLSTextEncodingIndex );
@@ -207,8 +119,6 @@ void do_cleanup( void )
 
             osl_destroyMutex( g_CurrentDirectoryMutex );
 
-#ifndef __MINGW32__
-
             /*
 
             On a product build memory management finalization might
@@ -243,7 +153,6 @@ void do_cleanup( void )
     }
 
     return TRUE;
-#endif
 }
 
 static DWORD GetParentProcessId()
diff --git a/sal/osl/w32/file.cxx b/sal/osl/w32/file.cxx
index 73cb2f8409ed..bb5df9940206 100644
--- a/sal/osl/w32/file.cxx
+++ b/sal/osl/w32/file.cxx
@@ -35,11 +35,6 @@
 #include <stdio.h>
 #include <tchar.h>
 
-#ifdef __MINGW32__
-#include <wchar.h>
-#include <ctype.h>
-#endif
-
 #include <algorithm>
 #include <limits>
 
diff --git a/sal/osl/w32/file_dirvol.cxx b/sal/osl/w32/file_dirvol.cxx
index a2fbfc15a21f..1f50617abab0 100644
--- a/sal/osl/w32/file_dirvol.cxx
+++ b/sal/osl/w32/file_dirvol.cxx
@@ -37,9 +37,6 @@
 #include <rtl/character.hxx>
 
 #include <tchar.h>
-#ifdef __MINGW32__
-#include <ctype.h>
-#endif
 
 static const wchar_t UNC_PREFIX[] = L"\\\\";
 static const wchar_t BACKSLASH = '\\';
diff --git a/sal/osl/w32/interlck.c b/sal/osl/w32/interlck.c
index 32ce6f694bb3..68c9504763a1 100644
--- a/sal/osl/w32/interlck.c
+++ b/sal/osl/w32/interlck.c
@@ -22,10 +22,6 @@
 #include <osl/interlck.h>
 #include <osl/diagnose.h>
 
-#if defined __MINGW32__
-#pragma GCC diagnostic warning "-Wreturn-type"
-#endif
-
 oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
 {
     return (InterlockedIncrement(pCount));
diff --git a/sal/osl/w32/signal.cxx b/sal/osl/w32/signal.cxx
index a9fa84f7c86b..c74dde485441 100644
--- a/sal/osl/w32/signal.cxx
+++ b/sal/osl/w32/signal.cxx
@@ -31,9 +31,7 @@
 
 #include <osl/diagnose.h>
 #include <osl/signal.h>
-#ifndef __MINGW32__
 #include <DbgHelp.h>
-#endif
 #include <errorrep.h>
 #include <systools/win32/uwinapi.h>
 #include <sal/macros.h>
diff --git a/sal/osl/w32/system.h b/sal/osl/w32/system.h
index 4cb8b4e76539..700d9aa578f8 100644
--- a/sal/osl/w32/system.h
+++ b/sal/osl/w32/system.h
@@ -43,47 +43,16 @@
 */
 #define WIN32_LEAN_AND_MEAN
 
-#ifdef __GNUC__
-    // windows.h includes winsock2.h
-    // if _WIN32_WINNT > 0x0400
-    // so someone cannot include winsock.h
-    // at the same time without patching
-    // windows.h
-    #include <windows.h>
-    #include <winsock2.h>
-    #ifdef __cplusplus
-    extern "C" {
-    #endif
-    #include <ws2tcpip.h>
-    #ifdef __cplusplus
-    }
-    #endif
-    #include <shlobj.h>
-    #ifndef NO_DEBUG_CRT
-        #include <crtdbg.h>
-    #endif
-#else
-    // winsock2.h includes windows.h
-    #pragma warning(push,1) /* disable warnings within system headers */
-    #pragma warning(disable:4917)
-    #include <winsock2.h>
-    #include <wsipx.h>
-    #include <ws2tcpip.h>
-    #include <shlobj.h>
-    #ifndef NO_DEBUG_CRT
-        #include <crtdbg.h>
-    #endif
-    #pragma warning(pop)
+// winsock2.h includes windows.h
+#pragma warning(push,1) /* disable warnings within system headers */
+#pragma warning(disable:4917)
+#include <winsock2.h>
+#include <wsipx.h>
+#include <ws2tcpip.h>
+#include <shlobj.h>
+#ifndef NO_DEBUG_CRT
+    #include <crtdbg.h>
 #endif
-
-#ifdef __GNUC__
-    #   ifndef SA_FAMILY_DECL
-    #       define SA_FAMILY_DECL short sa_family
-    #   endif
-
-    #   define NSPROTO_IPX      1000
-    #   define NSPROTO_SPX      1256
-    #   define NSPROTO_SPXII    1257
-#endif // #ifdef __GNUC__
+#pragma warning(pop)
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sal/osl/w32/tempfile.cxx b/sal/osl/w32/tempfile.cxx
index 14478e694a60..3128fb3f65d1 100644
--- a/sal/osl/w32/tempfile.cxx
+++ b/sal/osl/w32/tempfile.cxx
@@ -34,12 +34,8 @@
 #include <tchar.h>
 
 // Allocate n number of t's on the stack return a pointer to it in p
-#ifdef __MINGW32__
-#define STACK_ALLOC(p, t, n) (p) = reinterpret_cast<t*>(_alloca((n)*sizeof(t)));
-#else
 #define STACK_ALLOC(p, t, n) __try {(p) = static_cast<t*>(_alloca((n)*sizeof(t)));} \
                              __except(EXCEPTION_EXECUTE_HANDLER) {(p) = nullptr;}
-#endif
 
 // Temp file functions
 
diff --git a/sal/qa/rtl/oustringbuffer/test_oustringbuffer_assign.cxx b/sal/qa/rtl/oustringbuffer/test_oustringbuffer_assign.cxx
index 1e894129c649..aa14225bc455 100644
--- a/sal/qa/rtl/oustringbuffer/test_oustringbuffer_assign.cxx
+++ b/sal/qa/rtl/oustringbuffer/test_oustringbuffer_assign.cxx
@@ -44,8 +44,7 @@ private:
         b2 = "1234567890123456";
         CPPUNIT_ASSERT_EQUAL(s3, b2.toString());
         CPPUNIT_ASSERT_EQUAL(sal_Int32(32), b2.getCapacity());
-#if HAVE_CXX11_UTF16_STRING_LITERAL \
-    && (!defined SAL_W32 || defined __MINGW32__)
+#if HAVE_CXX11_UTF16_STRING_LITERAL && !defined SAL_W32
     // sal_Unicode is still wchar_t not char16_t even for MSVC 2015
         OUStringBuffer b3;
         b3 = u"123456789012345";
diff --git a/sal/qa/rtl/strings/test_oustring_stringliterals.cxx b/sal/qa/rtl/strings/test_oustring_stringliterals.cxx
index 094a779fc2f1..b221306f8ba4 100644
--- a/sal/qa/rtl/strings/test_oustring_stringliterals.cxx
+++ b/sal/qa/rtl/strings/test_oustring_stringliterals.cxx
@@ -353,8 +353,7 @@ void test::oustring::StringLiterals::checkOUStringLiteral1()
 }
 
 void test::oustring::StringLiterals::checkUtf16() {
-#if HAVE_CXX11_UTF16_STRING_LITERAL \
-        && (!defined SAL_W32 || defined __MINGW32__)
+#if HAVE_CXX11_UTF16_STRING_LITERAL && !defined SAL_W32
         // sal_Unicode is still wchar_t not char16_t even for MSVC 2015
     rtl::OUString s1(u"abc");
     CPPUNIT_ASSERT_EQUAL(rtl::OUString("abc"), s1);
diff --git a/sal/systools/win32/uwinapi/sntprintf.c b/sal/systools/win32/uwinapi/sntprintf.c
index a46ed2e7c478..22ce4f7d3050 100644
--- a/sal/systools/win32/uwinapi/sntprintf.c
+++ b/sal/systools/win32/uwinapi/sntprintf.c
@@ -22,10 +22,6 @@
 #include <stdarg.h>
 #include <stdio.h>
 
-#ifdef __MINGW32__
-/* MinGW-w64 doesn't have a _tcsinc() inline or library function */
-#define _MB_MAP_DIRECT
-#endif
 #include <tchar.h>
 #include <systools/win32/snprintf.h>
 
@@ -33,33 +29,8 @@
 #pragma warning(disable:4273)       // inconsistent dll linkage
 #endif
 
-#if defined(__MINGW32_VERSION) && ((__MINGW32_MAJOR_VERSION < 3)||((__MINGW32_MAJOR_VERSION == 3)&&(__MINGW32_MINOR_VERSION < 18)))
-
-/*  The non-debug versions of _vscprintf/_scprintf are just calls
-    to _vsprintf/_sprintf with string buffer pointer set to NULL,
-    requires MSVCRT version 7.0 */
-#ifdef __MINGW32__
-static int __cdecl _vsctprintf( const TCHAR *format, va_list ap )
-#else
-static int __cdecl _vsctprintf( const _TXCHAR *format, va_list ap )
-#endif
-{
-    FILE    *fp = _tfopen( _T("NUL"), _T("wb") );
-
-    if ( fp )
-    {
-        int retval = _vftprintf( fp, format, ap );
-        fclose( fp );
-
-        return retval;
-    }
-
-    return -1;
-}
-#endif
-
 /* VS 2015 and above support ISO C snprintf */
-#if (defined(__MINGW32__) && !defined (__NO_ISOCEXT)) || (defined(_MSC_VER) && (_MSC_VER < 1900))
+#if _MSC_VER < 1900
 
 /*  This function retrieves the pointer to the last character of a buffer.
     That is the pointer to the last character of the buffer that fits