Fix Abseil CMake package name

It's "absl" not "abseil".

If we use "abseil", -Dabseil_SOURCE=SYSTEM is never succeeded because
abseilConfig.cmake doesn't exist.

Author: kou

CMake/abseil.cmake CMake/absl.cmakeCMake/abseil.cmake renamed to CMake/absl.cmake

@@ -3,20 +3,20 @@ include_guard(GLOBAL)
 # TODO: these variables are named VELOX_* because we are piggy-backing on
 # Velox's resolve dependency module for now. We should change and have our own
 # in the future.
-set(VELOX_ABSEIL_VERSION 20240116.0)
-set(VELOX_ABSEIL_BUILD_SHA256_CHECKSUM
+set(VELOX_ABSL_VERSION 20240116.0)
+set(VELOX_ABSL_BUILD_SHA256_CHECKSUM
     "338420448b140f0dfd1a1ea3c3ce71b3bc172071f24f4d9a57d59b45037da440")
-set(VELOX_ABSEIL_SOURCE_URL
-    "https://github.com/abseil/abseil-cpp/archive/refs/tags/${VELOX_ABSEIL_VERSION}.tar.gz"
+set(VELOX_ABSL_SOURCE_URL
+    "https://github.com/abseil/abseil-cpp/archive/refs/tags/${VELOX_ABSL_VERSION}.tar.gz"
 )
 
-velox_resolve_dependency_url(ABSEIL)
+velox_resolve_dependency_url(ABSL)
 
-message(STATUS "Building abseil from source")
+message(STATUS "Building Abseil from source")
 
 FetchContent_Declare(
-  abseil
-  URL ${VELOX_ABSEIL_SOURCE_URL}
-  URL_HASH ${VELOX_ABSEIL_BUILD_SHA256_CHECKSUM})
+  absl
+  URL ${VELOX_ABSL_SOURCE_URL}
+  URL_HASH ${VELOX_ABSL_BUILD_SHA256_CHECKSUM})
 
-FetchContent_MakeAvailable(abseil)
+FetchContent_MakeAvailable(absl)

CMakeLists.txt

@@ -115,8 +115,8 @@ velox_resolve_dependency(Boost 1.77.0 COMPONENTS ${BOOST_INCLUDE_LIBRARIES})
 velox_set_source(folly)
 velox_resolve_dependency(folly)
 
-velox_set_source(abseil)
-velox_resolve_dependency(abseil)
+velox_set_source(absl)
+velox_resolve_dependency(absl)
 
 # Use xxhash and xsimd from Velox for now.
 include_directories(.)