[llvm-rc] Use proper search algorithm for finding resources.

Previously we would only look in the current directory for a
resource, which might not be the same as the directory of the
rc file.  Furthermore, MSVC rc supports a /I option, and can
also look in the system environment.  This patch adds support
for this search algorithm.

Differential Revision: https://reviews.llvm.org/D38740

llvm-svn: 315499

3 files changed, 5 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-rc/Inputs/deep-include.rc b/llvm/test/tools/llvm-rc/Inputs/deep-include.rc
new file mode 100644
index 00000000000..b28fa8f243a
--- /dev/null
+++ b/llvm/test/tools/llvm-rc/Inputs/deep-include.rc
@@ -0,0 +1,3 @@
+// Whether this is found depends on whether the /I flag searches within the
+// "nested" subdirectory
+foo BITMAP "nested-bitmap.bmp"
\ No newline at end of file
diff --git a/llvm/test/tools/llvm-rc/Inputs/include.rc b/llvm/test/tools/llvm-rc/Inputs/include.rc
new file mode 100644
index 00000000000..1cd4c28fa29
--- /dev/null
+++ b/llvm/test/tools/llvm-rc/Inputs/include.rc
@@ -0,0 +1,2 @@
+// Found because bitmap.bmp is in same directory
+foo BITMAP "bitmap.bmp"
\ No newline at end of file
diff --git a/llvm/test/tools/llvm-rc/Inputs/nested/nested-bitmap.bmp b/llvm/test/tools/llvm-rc/Inputs/nested/nested-bitmap.bmp
new file mode 100644
index 00000000000..5d5a00d8745
--- /dev/null
+++ b/llvm/test/tools/llvm-rc/Inputs/nested/nested-bitmap.bmp