Add more guards around zlib-dependent code
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180084 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index 408c590..97af695 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -230,6 +230,9 @@
/* Define to 1 if you have the `udis86' library (-ludis86). */
#undef HAVE_LIBUDIS86
+/* Define to 1 if you have the 'z' library (-lz). */
+#cmakedefine HAVE_LIBZ ${HAVE_LIBZ}
+
/* Define to 1 if you have the <limits.h> header file. */
#cmakedefine HAVE_LIMITS_H ${HAVE_LIMITS_H}
diff --git a/lib/Support/Compression.cpp b/lib/Support/Compression.cpp
index d0adf79..497b17e 100644
--- a/lib/Support/Compression.cpp
+++ b/lib/Support/Compression.cpp
@@ -23,7 +23,7 @@
using namespace llvm;
-#if LLVM_ENABLE_ZLIB == 1
+#if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ
static int encodeZlibCompressionLevel(zlib::CompressionLevel Level) {
switch (Level) {
case zlib::NoCompression: return 0;
diff --git a/unittests/Support/CompressionTest.cpp b/unittests/Support/CompressionTest.cpp
index aad7ed0..c8e2cd9 100644
--- a/unittests/Support/CompressionTest.cpp
+++ b/unittests/Support/CompressionTest.cpp
@@ -22,7 +22,7 @@
namespace {
-#if LLVM_ENABLE_ZLIB == 1
+#if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ
void TestZlibCompression(StringRef Input, zlib::CompressionLevel Level) {
OwningPtr<MemoryBuffer> Compressed;