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[llvm-nm] Support the -V option, print that the tool is compatible with GNU nm

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This unlocks some codepaths in libtool.

Differential Revision: https://reviews.llvm.org/D102321
This commit is contained in:
Martin Storsjö 2021-05-11 09:19:52 +03:00
parent 7deb5ef44f
commit b42fb6811e
3 changed files with 25 additions and 3 deletions
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6
llvm/docs/CommandGuide/llvm-nm.rst
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@ -230,10 +230,10 @@ OPTIONS
Print only undefined symbols.
.. option:: --version
.. option:: --version, -V
Display the version of the :program:`llvm-nm` executable. Does not stack with
other commands.
Display the version of the :program:`llvm-nm` executable, then exit. Does not
stack with other commands.
.. option:: --without-aliases

8
llvm/test/tools/llvm-nm/libtool-version.test Normal file
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@ -0,0 +1,8 @@
# Check that the output of llvm-nm -V (and --version) contains the text
# "GNU" somewhere, to let libtool know that it is compatible with GNU nm.
# Also check that it contains the LLVM version.
RUN: llvm-nm -V | FileCheck %s
RUN: llvm-nm --version | FileCheck %s
CHECK: LLVM version
CHECK: GNU

14
llvm/tools/llvm-nm/llvm-nm.cpp
View File

@ -229,6 +229,8 @@ cl::opt<bool> AddInlinedInfo("add-inlinedinfo",
"TBD(Mach-O) only"),
cl::cat(NMCat));
cl::opt<bool> Version("V", cl::desc("Print version info"), cl::cat(NMCat));
cl::extrahelp HelpResponse("\nPass @FILE as argument to read options from FILE.\n");
bool PrintAddress = true;
@ -2235,11 +2237,23 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
}
}
static void printExtraVersionInfo(raw_ostream &Outs) {
// This needs to contain the word "GNU", libtool looks for that string.
Outs << "llvm-nm, compatible with GNU nm\n";
}
int main(int argc, char **argv) {
InitLLVM X(argc, argv);
cl::HideUnrelatedOptions(NMCat);
cl::AddExtraVersionPrinter(printExtraVersionInfo);
cl::ParseCommandLineOptions(argc, argv, "llvm symbol table dumper\n");
if (Version) {
cl::PrintVersionMessage();
printExtraVersionInfo(outs());
return 0;
}
// llvm-nm only reads binary files.
if (error(sys::ChangeStdinToBinary()))
return 1;