Take abseil as a dependency

1. Add abseil-cpp as a submodule. We are tracking the latest LTS
release, which is lts_2024_01_16.
2. Replace glog/gflags with absl::log and absl::flags.
3. Remove miniglog
4. Also take a whack at making the bazel build work with
   abseil-cpp and gtest.

There are a number of TODOs in this CL that still need to be resolved.

Change-Id: I39355ed7d61375be4ebcbc8596d9cc70acc1c678

bazel/ceres.bzl

@@ -140,14 +140,15 @@ CERES_SRCS = ["internal/ceres/" + filename for filename in [
 # TODO(rodrigoq): add support to configure Ceres into various permutations,
 # like SuiteSparse or not, threading or not, glog or not, and so on.
 # See https://github.com/ceres-solver/ceres-solver/issues/335.
-def ceres_library(name,
-                  restrict_schur_specializations=False):
+def ceres_library(
+        name,
+        restrict_schur_specializations = False):
     # The path to internal/ depends on whether Ceres is the main workspace or
     # an external repository.
-    if native.repository_name() != '@':
-        internal = 'external/%s/internal' % native.repository_name().lstrip('@')
+    if native.repository_name() != "@":
+        internal = "external/%s/internal" % native.repository_name().lstrip("@")
     else:
-        internal = 'internal'
+        internal = "internal"
 
     # The fixed-size Schur eliminator template instantiations incur a large
     # binary size penalty, and are slow to compile, so support disabling them.
@@ -185,11 +186,7 @@ def ceres_library(name,
                 "config/ceres/internal/config.h",
                 "config/ceres/internal/export.h",
             ]),
-        copts = [
-            "-I" + internal,
-            "-Wunused-parameter",
-            "-Wno-sign-compare",
-        ] + schur_eliminator_copts,
+        copts = schur_eliminator_copts,
 
         # These include directories and defines are propagated to other targets
         # depending on Ceres.
@@ -198,23 +195,26 @@ def ceres_library(name,
         # part of a Skylark Ceres target macro.
         # https://github.com/ceres-solver/ceres-solver/issues/396
         defines = [
-            "CERES_EXPORT=",
             "CERES_NO_ACCELERATE_SPARSE",
             "CERES_NO_CHOLMOD_PARTITION",
             "CERES_NO_CUDA",
+            "CERES_NO_CUDSS",
             "CERES_NO_EIGEN_METIS",
             "CERES_NO_EXPORT=",
             "CERES_NO_LAPACK",
             "CERES_NO_SUITESPARSE",
             "CERES_USE_EIGEN_SPARSE",
+            "CERES_EXPORT=",
         ],
         includes = [
             "config",
             "include",
+            "internal",
         ],
         visibility = ["//visibility:public"],
         deps = [
-            "@com_gitlab_libeigen_eigen//:eigen",
-            "@com_github_google_glog//:glog",
+            "@eigen//:eigen",
+            "@abseil-cpp//absl/log",
+            "@abseil-cpp//absl/log:check",
         ],
     )