[libc][NFC] Exclude few targets from the `all` target.

GitOrigin-RevId: 6628387c9a0e48355638c287e7111d7c400e4926
diff --git a/cmake/modules/LLVMLibCLibraryRules.cmake b/cmake/modules/LLVMLibCLibraryRules.cmake
index 4c9f9a6..21a99a0 100644
--- a/cmake/modules/LLVMLibCLibraryRules.cmake
+++ b/cmake/modules/LLVMLibCLibraryRules.cmake
@@ -134,6 +134,7 @@
   # prevent DT_NEEDED on C++ runtime.
   add_library(
     ${target_name}
+    EXCLUDE_FROM_ALL
     SHARED
     ${obj_files}
   )
diff --git a/cmake/modules/LLVMLibCObjectRules.cmake b/cmake/modules/LLVMLibCObjectRules.cmake
index 93f772d..9afbedc 100644
--- a/cmake/modules/LLVMLibCObjectRules.cmake
+++ b/cmake/modules/LLVMLibCObjectRules.cmake
@@ -25,6 +25,7 @@
   get_fq_target_name(${target_name} fq_target_name)
   add_library(
     ${fq_target_name}
+    EXCLUDE_FROM_ALL
     OBJECT
     ${ADD_OBJECT_SRCS}
     ${ADD_OBJECT_HDRS}
@@ -157,6 +158,7 @@
     ${internal_target_name}
     # TODO: We don't need an object library for internal consumption.
     # A future change should switch this to a normal static library.
+    EXCLUDE_FROM_ALL
     OBJECT
     ${ADD_ENTRYPOINT_OBJ_SRCS}
     ${ADD_ENTRYPOINT_OBJ_HDRS}
@@ -169,6 +171,7 @@
     ${fq_target_name}
     # We want an object library as the objects will eventually get packaged into
     # an archive (like libc.a).
+    EXCLUDE_FROM_ALL
     OBJECT
     ${ADD_ENTRYPOINT_OBJ_SRCS}
     ${ADD_ENTRYPOINT_OBJ_HDRS}
@@ -268,6 +271,7 @@
 
   add_library(
     ${target_name}
+    EXCLUDE_FROM_ALL
     OBJECT
     ${REDIRECTOR_OBJECT_SRC}
   )