Revert "Use `GNUInstallDirs` to support custom installation dirs. -- LLVM"

This reverts commit 6fd2db04d0f22ea22c5317d98ce2126aa64b6a73 since it
broke GreenDragon LLDB-Incremental bot:

https://green.lab.llvm.org/green/job/lldb-cmake/37560/console

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>

1 files changed, 4 insertions, 10 deletions

diff --git a/llvm/tools/llvm-config/llvm-config.cpp b/llvm/tools/llvm-config/llvm-config.cpp
index bce73ae..8afd359 100644
--- a/llvm/tools/llvm-config/llvm-config.cpp
+++ b/llvm/tools/llvm-config/llvm-config.cpp
@@ -357,16 +357,10 @@ int main(int argc, char **argv) {
         ("-I" + ActiveIncludeDir + " " + "-I" + ActiveObjRoot + "/include");
   } else {
     ActivePrefix = CurrentExecPrefix;
-    {
-      SmallString<256> Path(LLVM_INSTALL_INCLUDEDIR);
-      sys::fs::make_absolute(ActivePrefix, Path);
-      ActiveIncludeDir = std::string(Path.str());
-    }
-    {
-      SmallString<256> Path(LLVM_INSTALL_BINDIR);
-      sys::fs::make_absolute(ActivePrefix, Path);
-      ActiveBinDir = std::string(Path.str());
-    }
+    ActiveIncludeDir = ActivePrefix + "/include";
+    SmallString<256> path(LLVM_TOOLS_INSTALL_DIR);
+    sys::fs::make_absolute(ActivePrefix, path);
+    ActiveBinDir = std::string(path.str());
     ActiveLibDir = ActivePrefix + "/lib" + LLVM_LIBDIR_SUFFIX;
     ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
     ActiveIncludeOption = "-I" + ActiveIncludeDir;