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Make it possible to override the standard version printer. Not all tools

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built with CommandLine.h will want the --version option to report that the
tool belongs to LLVM. To override simply pass a void func() to the
cl::SetVersionPrinter() function and that void func() will be called when
it is time to print the version information.

llvm-svn: 28687
This commit is contained in:
Reid Spencer 2006-06-05 16:22:56 +00:00
parent f640054d89
commit 24f0a4a816
2 changed files with 36 additions and 18 deletions
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7
include/llvm/Support/CommandLine.h
View File

@ -48,6 +48,13 @@ void ParseCommandLineOptions(int &argc, char **argv,
void ParseEnvironmentOptions(const char *progName, const char *envvar,
const char *Overview = 0);
///===---------------------------------------------------------------------===//
/// SetVersionPrinter - Override the default (LLVM specific) version printer
/// used to print out the version when --version is given
/// on the command line. This gives other systems using the
/// CommandLine utilities to print their own version string.
void SetVersionPrinter(void (*func)());
//===----------------------------------------------------------------------===//
// Flags permitted to be passed to command line arguments
//

47
lib/Support/CommandLine.cpp
View File

@ -951,24 +951,6 @@ public:
}
};
class VersionPrinter {
public:
void operator=(bool OptionWasSpecified) {
if (OptionWasSpecified) {
std::cout << "Low Level Virtual Machine (" << PACKAGE_NAME << ") "
<< PACKAGE_VERSION << " (see http://llvm.org/)";
#ifndef NDEBUG
std::cout << " ASSERTIONS ENABLED\n";
#else
std::cout << "\n";
#endif
getOpts().clear(); // Don't bother making option dtors remove from map.
exit(1);
}
}
};
// Define the two HelpPrinter instances that are used to print out help, or
// help-hidden...
//
@ -983,6 +965,31 @@ cl::opt<HelpPrinter, true, parser<bool> >
HHOp("help-hidden", cl::desc("Display all available options"),
cl::location(HiddenPrinter), cl::Hidden, cl::ValueDisallowed);
void (*OverrideVersionPrinter)() = 0;
class VersionPrinter {
public:
void operator=(bool OptionWasSpecified) {
if (OptionWasSpecified) {
if (OverrideVersionPrinter == 0) {
std::cout << "Low Level Virtual Machine (" << PACKAGE_NAME << ") "
<< PACKAGE_VERSION << " (see http://llvm.org/)";
#ifndef NDEBUG
std::cout << " ASSERTIONS ENABLED\n";
#else
std::cout << "\n";
#endif
getOpts().clear(); // Don't bother making option dtors remove from map.
exit(1);
} else {
(*OverrideVersionPrinter)();
exit(1);
}
}
}
};
// Define the --version option that prints out the LLVM version for the tool
VersionPrinter VersionPrinterInstance;
cl::opt<VersionPrinter, true, parser<bool> >
@ -1002,3 +1009,7 @@ void cl::PrintHelpMessage() {
// to make it look like --help was given, so we assign true.
NormalPrinter = true;
}
void cl::SetVersionPrinter(void (*func)()) {
OverrideVersionPrinter = func;
}