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Fix support for large RPATH updates (#16105) 

Avoid using a KWSys RegularExpression to search for RPATH substrings.
It cannot handle large expressions.
This commit is contained in:
Brad King 2016-05-19 11:51:51 -04:00
parent e0da6c3b56
commit f4d3c44cc7
1 changed files with 23 additions and 27 deletions
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54
Source/cmSystemTools.cxx
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@ -2135,37 +2135,33 @@ bool cmSystemTools::GuessLibraryInstallName(std::string const& fullPath,
std::string::size_type cmSystemToolsFindRPath(std::string const& have,
std::string const& want)
{
// Search for the desired rpath.
std::string::size_type pos = have.find(want);
// If the path is not present we are done.
if (pos == std::string::npos) {
return pos;
}
// Build a regex to match a properly separated path instance.
std::string regex_str = "(^|:)(";
for (std::string::const_iterator i = want.begin(); i != want.end(); ++i) {
int ch = *i;
if (!(('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
('0' <= ch && ch <= '9'))) {
// Escape the non-alphanumeric character.
regex_str += "\\";
}
// Store the character.
regex_str.append(1, static_cast<char>(ch));
}
regex_str += ")(:|$)";
// Look for the separated path.
cmsys::RegularExpression regex(regex_str.c_str());
if (regex.find(have)) {
// Return the position of the path portion.
return regex.start(2);
} else {
// The desired rpath was not found.
std::string::size_type pos = 0;
while (pos < have.size()) {
// Look for an occurrence of the string.
std::string::size_type const beg = have.find(want, pos);
if (beg == std::string::npos) {
return std::string::npos;
}
// Make sure it is separated from preceding entries.
if (beg > 0 && have[beg - 1] != ':') {
pos = beg + 1;
continue;
}
// Make sure it is separated from following entries.
std::string::size_type const end = beg + want.size();
if (end < have.size() && have[end] != ':') {
pos = beg + 1;
continue;
}
// Return the position of the path portion.
return beg;
}
// The desired rpath was not found.
return std::string::npos;
}
#endif