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Add an extension point to the CommandLine library where clients can

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register extra version information to be printed. This is designed to
allow those tools which link in various targets to also print those
registered targets under --version.

Currently this printing logic is embedded into the Support library
directly; a huge layering violation. This is the first step to hoisting
it out into the tools without adding lots of duplicated code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135755 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2011-07-22 07:50:40 +00:00
parent 12b2772578
commit 6d51d26a24
2 changed files with 31 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/llvm/Support/CommandLine.h
View File

@ -59,6 +59,15 @@ void ParseEnvironmentOptions(const char *progName, const char *envvar,
/// CommandLine utilities to print their own version string.
void SetVersionPrinter(void (*func)());
///===---------------------------------------------------------------------===//
/// AddExtraVersionPrinter - Add an extra printer to use in addition to the
/// default one. This can be called multiple times,
/// and each time it adds a new function to the list
/// which will be called after the basic LLVM version
/// printing is complete. Each can then add additional
/// information specific to the tool.
void AddExtraVersionPrinter(void (*func)());
// PrintOptionValues - Print option values.
// With -print-options print the difference between option values and defaults.

25
lib/Support/CommandLine.cpp
View File

@ -1330,6 +1330,8 @@ void cl::PrintOptionValues() {
static void (*OverrideVersionPrinter)() = 0;
static std::vector<void (*)()>* ExtraVersionPrinters = 0;
static int TargetArraySortFn(const void *LHS, const void *RHS) {
typedef std::pair<const char *, const Target*> pair_ty;
return strcmp(((const pair_ty*)LHS)->first, ((const pair_ty*)RHS)->first);
@ -1387,11 +1389,21 @@ public:
void operator=(bool OptionWasSpecified) {
if (!OptionWasSpecified) return;
if (OverrideVersionPrinter == 0) {
print();
if (OverrideVersionPrinter != 0) {
(*OverrideVersionPrinter)();
exit(1);
}
(*OverrideVersionPrinter)();
print();
// Iterate over any registered extra printers and call them to add further
// information.
if (ExtraVersionPrinters != 0) {
for (std::vector<void (*)()>::iterator I = ExtraVersionPrinters->begin(),
E = ExtraVersionPrinters->end();
I != E; ++I)
(*I)();
}
exit(1);
}
};
@ -1424,3 +1436,10 @@ void cl::PrintVersionMessage() {
void cl::SetVersionPrinter(void (*func)()) {
OverrideVersionPrinter = func;
}
void cl::AddExtraVersionPrinter(void (*func)()) {
if (ExtraVersionPrinters == 0)
ExtraVersionPrinters = new std::vector<void (*)()>;
ExtraVersionPrinters->push_back(func);
}