diff --git a/BUILD b/BUILD
index 652c4b17..9c7a799c 100644
--- a/BUILD
+++ b/BUILD
@@ -32,6 +32,7 @@
 # not support parameterization around threading choice or sparse backends.
 
 load("//:bazel/ceres.bzl", "ceres_library")
+load("@org_frc971//tools/build_rules:select.bzl", "compiler_select")
 
 ceres_library(
     name = "ceres",
@@ -48,6 +49,7 @@ cc_library(
     ]],
     copts = [
         "-Wno-sign-compare",
+        "-Wno-unused-but-set-variable",
         "-DCERES_TEST_SRCDIR_SUFFIX=\\\"data/\\\"",
     ],
     includes = [
@@ -158,12 +160,16 @@ TEST_COPTS = [
     # but in the future disable these warnings only for rotation_test.
     # TODO(keir): When the tests are macro-ified, apply these selectively.
     "-Wno-address",
-]
+    "-Wno-unused-parameter",
+] + compiler_select({
+    "gcc": ["-Wno-use-after-free"],
+    "clang": [],
+})
 
 TEST_DEPS = [
     "//:ceres",
     "//:test_util",
-    "@com_gitlab_libeigen_eigen//:eigen",
+    "@org_tuxfamily_eigen//:eigen",
     "@com_google_absl//absl/flags:flag",
 ]
 
diff --git a/bazel/ceres.bzl b/bazel/ceres.bzl
index ed4d66d9..be8948d7 100644
--- a/bazel/ceres.bzl
+++ b/bazel/ceres.bzl
@@ -190,6 +190,9 @@ def ceres_library(
             "-I" + internal,
             "-Wunused-parameter",
             "-Wno-sign-compare",
+            "-Wno-format-nonliteral",
+            "-Wno-unused-parameter",
+            "-Wno-unused-but-set-variable",
         ] + schur_eliminator_copts,
 
         # These include directories and defines are propagated to other targets
@@ -215,7 +218,7 @@ def ceres_library(
         ],
         visibility = ["//visibility:public"],
         deps = [
-            "@com_gitlab_libeigen_eigen//:eigen",
+            "@org_tuxfamily_eigen//:eigen",
             "@com_google_absl//absl/flags:flag",
             "@com_google_absl//absl/log",
             "@com_google_absl//absl/log:check",
diff --git a/examples/BUILD b/examples/BUILD
index e45fe318..6296417a 100644
--- a/examples/BUILD
+++ b/examples/BUILD
@@ -31,13 +31,14 @@
 EXAMPLE_COPTS = [
     # Needed to silence GFlags complaints.
     "-Wno-sign-compare",
+    "-Wno-unused-parameter",
     # Needed to put fscanf in a function.
     "-Wno-format-nonliteral",
 ]
 
 EXAMPLE_DEPS = [
     "//:ceres",
-    "@com_gitlab_libeigen_eigen//:eigen",
+    "@org_tuxfamily_eigen//:eigen",
     "@com_google_absl//absl/flags:flag",
     "@com_google_absl//absl/log:log",
     "@com_google_absl//absl/log:check",
diff --git a/internal/ceres/autodiff_test.cc b/internal/ceres/autodiff_test.cc
index b50327cb..19adcae0 100644
--- a/internal/ceres/autodiff_test.cc
+++ b/internal/ceres/autodiff_test.cc
@@ -647,6 +647,10 @@ TEST(AutoDiff, VariadicAutoDiff) {
   }
 }
 
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-but-set-variable"
+#endif
 // This is fragile test that triggers the alignment bug on
 // i686-apple-darwin10-llvm-g++-4.2 (GCC) 4.2.1. It is quite possible,
 // that other combinations of operating system + compiler will
@@ -671,5 +675,8 @@ TEST(AutoDiff, AlignedAllocationTest) {
   // Need this to makes sure that x does not get optimized out.
   x[0] = x[0] + JetT(1.0);
 }
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
 
 }  // namespace ceres::internal
diff --git a/internal/ceres/bundle_adjustment_test_util.h b/internal/ceres/bundle_adjustment_test_util.h
index fb2ac719..993863a2 100644
--- a/internal/ceres/bundle_adjustment_test_util.h
+++ b/internal/ceres/bundle_adjustment_test_util.h
@@ -98,7 +98,8 @@ class BundleAdjustmentProblem {
 
  private:
   void ReadData(const std::string& filename) {
-    FILE* fptr = fopen(filename.c_str(), "r");
+    FILE* fptr = fopen(
+        (std::string("../com_google_ceres_solver/") + filename).c_str(), "r");
 
     if (!fptr) {
       LOG(FATAL) << "File Error: unable to open file " << filename;
diff --git a/internal/ceres/triplet_sparse_matrix_test.cc b/internal/ceres/triplet_sparse_matrix_test.cc
index e145c1a2..bde9a6ed 100644
--- a/internal/ceres/triplet_sparse_matrix_test.cc
+++ b/internal/ceres/triplet_sparse_matrix_test.cc
@@ -184,8 +184,15 @@ TEST(TripletSparseMatrix, AssignmentOperatorSelfAssignment) {
   orig.mutable_values()[1] = 5.2;
   orig.set_num_nonzeros(2);
 
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wself-assign-overloaded"
+#endif
   // Who's on earth gonna do this?
   orig = orig;
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
 
   EXPECT_EQ(orig.num_rows(), 2);
   EXPECT_EQ(orig.num_cols(), 5);