exewrapper: report name of failed DLL in error message
This uses C string literal concatenation.
Example output:
$ hg version
abort: failed to load Python DLL python27.dll
Note that HGPYTHONLIB does not contain the trailing .dll, which works here
because the documentation of LoadLibrary [1] says, that if no file name
extension is specified in the filename parameter, the default library
extension .dll is appended.
See [2] for a motivation of this change.
[1] https://msdn.microsoft.com/en-us/library/windows/desktop/ms684175(v=vs.85).aspx
[2] https://selenic.com/pipermail/mercurial/2015-August/048627.html
--- a/mercurial/exewrapper.c Tue Oct 13 00:16:25 2015 +0200
+++ b/mercurial/exewrapper.c Wed Oct 14 12:22:09 2015 +0200
@@ -106,7 +106,7 @@
if (pydll == NULL) {
pydll = LoadLibrary(HGPYTHONLIB);
if (pydll == NULL) {
- err = "failed to load Python DLL";
+ err = "failed to load Python DLL " HGPYTHONLIB ".dll";
goto bail;
}
}