fix abseil includes

Author: Jeongwoo Seo

contrib/absl/absl/CMakeLists.txt

@@ -7,3 +7,26 @@ TARGET_INCLUDE_DIRECTORIES (absl_int128
 )
 
 ADD_LIBRARY (absl::int128 ALIAS absl_int128)
+
+INSTALL(FILES
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/base/attributes.h
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/base/config.h
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/base/macros.h
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/base/optimization.h
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/base/options.h
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/base/policy_checks.h
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/base/port.h
+    DESTINATION include/absl/base
+)
+
+INSTALL(FILES
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/base/internal/bits.h
+    DESTINATION include/absl/base/internal
+)
+
+INSTALL(FILES
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/numeric/int128.h
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/numeric/int128_have_intrinsic.inc
+    ${PROJECT_SOURCE_DIR}/contrib/absl/absl/numeric/int128_no_intrinsic.inc
+  DESTINATION include/absl/numeric
+)