Program.launch will first attempt to open files using libgio and then fallback
to gnome-vfs.  gio_launch uses g_file_new_for_path which fails when passed a
URI.  If swt was built with USE="-gnome" then the fallback fails as well,
making it appear that a package has a dependency on swt[gnome] when it does
not.

Caused by: java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons: 
        no swt-gnome-gtk-3740 in java.library.path
        no swt-gnome-gtk in java.library.path
        Can't load library: /home/xxx/.swt/lib/linux/x86_64/libswt-gnome-gtk-3740.so
        Can't load library: /home/xxx/.swt/lib/linux/x86_64/libswt-gnome-gtk.so

Use g_file_new_for_commandline_arg instead.

https://bugs.gentoo.org/424151


--- a/os.c
+++ b/os.c
@@ -3059,6 +3059,30 @@ fail:
 }
 #endif
 
+#ifndef NO__1g_1file_1new_1for_1commandline_1arg
+JNIEXPORT jintLong JNICALL OS_NATIVE(_1g_1file_1new_1for_1commandline_1arg)
+	(JNIEnv *env, jclass that, jbyteArray arg0)
+{
+	jbyte *lparg0=NULL;
+	jintLong rc = 0;
+	OS_NATIVE_ENTER(env, that, _1g_1file_1new_1for_1commandline_1arg_FUNC);
+	if (arg0) if ((lparg0 = (*env)->GetByteArrayElements(env, arg0, NULL)) == NULL) goto fail;
+/*
+	rc = (jintLong)g_file_new_for_commandline_arg(lparg0);
+*/
+	{
+		LOAD_FUNCTION(fp, g_file_new_for_commandline_arg)
+		if (fp) {
+			rc = (jintLong)((jintLong (CALLING_CONVENTION*)(jbyte *))fp)(lparg0);
+		}
+	}
+fail:
+	if (arg0 && lparg0) (*env)->ReleaseByteArrayElements(env, arg0, lparg0, 0);
+	OS_NATIVE_EXIT(env, that, _1g_1file_1new_1for_1commandline_1arg_FUNC);
+	return rc;
+}
+#endif
+
 #ifndef NO__1g_1file_1new_1for_1path
 JNIEXPORT jintLong JNICALL OS_NATIVE(_1g_1file_1new_1for_1path)
 	(JNIEnv *env, jclass that, jbyteArray arg0)
--- a/os_custom.h
+++ b/os_custom.h
@@ -280,6 +280,7 @@
 #define g_file_icon_get_file_LIB LIB_GIO
 #define g_file_info_get_content_type_LIB LIB_GIO
 #define g_file_info_get_modification_time_LIB LIB_GIO
+#define g_file_new_for_commandline_arg_LIB LIB_GIO
 #define g_file_new_for_path_LIB LIB_GIO
 #define g_file_new_for_uri_LIB LIB_GIO
 #define g_file_read_LIB LIB_GIO
--- a/os_stats.c
+++ b/os_stats.c
@@ -18,8 +18,8 @@
 
 #ifdef NATIVE_STATS
 
-int OS_nativeFunctionCount = 1396;
-int OS_nativeFunctionCallCount[1396];
+int OS_nativeFunctionCount = 1397;
+int OS_nativeFunctionCallCount[1397];
 char * OS_nativeFunctionNames[] = {
 #ifndef JNI64
 	"Call__IIII",
@@ -250,6 +250,7 @@ char * OS_nativeFunctionNames[] = {
 	"_1g_1file_1icon_1get_1file",
 	"_1g_1file_1info_1get_1content_1type",
 	"_1g_1file_1info_1get_1modification_1time",
+	"_1g_1file_1new_1for_1commandline_1arg",
 	"_1g_1file_1new_1for_1path",
 	"_1g_1file_1new_1for_1uri",
 	"_1g_1file_1query_1info",
--- a/os_stats.h
+++ b/os_stats.h
@@ -258,6 +258,7 @@ typedef enum {
 	_1g_1file_1icon_1get_1file_FUNC,
 	_1g_1file_1info_1get_1content_1type_FUNC,
 	_1g_1file_1info_1get_1modification_1time_FUNC,
+	_1g_1file_1new_1for_1commandline_1arg_FUNC,
 	_1g_1file_1new_1for_1path_FUNC,
 	_1g_1file_1new_1for_1uri_FUNC,
 	_1g_1file_1query_1info_FUNC,
--- a/src/org/eclipse/swt/internal/gtk/OS.java
+++ b/src/org/eclipse/swt/internal/gtk/OS.java
@@ -2113,6 +2113,16 @@ public static final long /*int*/ g_file_new_for_path(byte[] fileName) {
 	}
 }
 /** @method flags=dynamic */
+public static final native long /*int*/ _g_file_new_for_commandline_arg(byte[] fileName);
+public static final long /*int*/ g_file_new_for_commandline_arg(byte[] fileName) {
+	lock.lock();
+	try {
+		return _g_file_new_for_commandline_arg(fileName);
+	} finally {
+		lock.unlock();
+	}
+}
+/** @method flags=dynamic */
 public static final native long /*int*/ _g_file_new_for_uri(byte[] fileName);
 public static final long /*int*/ g_file_new_for_uri(byte[] fileName) {
 	lock.lock();
--- a/src/org/eclipse/swt/program/Program.java
+++ b/src/org/eclipse/swt/program/Program.java
@@ -954,7 +954,7 @@ static boolean gio_isExecutable(String fileName) {
 static boolean gio_launch(String fileName) {
 	boolean result = false;
 	byte[] fileNameBuffer = Converter.wcsToMbcs (null, fileName, true);
-	long /*int*/ file = OS.g_file_new_for_path (fileNameBuffer);
+	long /*int*/ file = OS.g_file_new_for_commandline_arg (fileNameBuffer);
 	if (file != 0) {
 		long /*int*/ uri = OS.g_file_get_uri (file);
 		if (uri != 0) {