Fix lookup of source names after conversion to their actual case (#15259)

Since commit v3.1.0-rc1~688^2~15 (cmTarget: Add a method to obtain list of
filenames for sources, 2014-03-17) we have code paths that lookup sources by
strings containing their own full path after normalization to the actual case
on disk.  This fails in the case that a cmSourceFile has already been created
with a different case in the filename.  The comparison of the directory works
because it is always normalized.  Only the comparison of the file name fails.

Fix this by using a case-insensitive comparison of source file names on
platforms that do not have case-sensitive filesystems.

1 files changed, 2 insertions, 1 deletions

diff --git a/Source/cmSourceFileLocation.cxx b/Source/cmSourceFileLocation.cxx
index 1c2454e..004fd1f 100644
--- a/Source/cmSourceFileLocation.cxx
+++ b/Source/cmSourceFileLocation.cxx
@@ -216,7 +216,8 @@ bool cmSourceFileLocation::Matches(cmSourceFileLocation const& loc)
     // Both extensions are similarly ambiguous.  Since only the old fixed set
     // of extensions will be tried, the names must match at this point to be
     // the same file.
-    if(this->Name.size() != loc.Name.size() || this->Name != loc.Name)
+    if(this->Name.size() != loc.Name.size() ||
+      !cmSystemTools::ComparePath(this->Name, loc.Name))
       {
       return false;
       }