From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: FreeBSD Ports Collection <ports@FreeBSD.org>
Date: Sat, 01 Jan 2000 00:00:00 +0000
Subject: [PATCH] Fix gperftools Bazel build for FreeBSD

- Fix CXXFLAGS/CFLAGS select(): the //conditions:default branch used
  MSVC-style flags (/std:c++17 /D_WIN32_WINNT=0x0602) which break clang
  when @bazel_tools//tools/cpp:compiler does not match :is_clang.
  Change default to GCC-compatible flags (same as :is_gcc/:is_clang).
- Add "@platforms//os:freebsd": [] to NON_WINDOWS so targets using
  target_compatible_with = NON_WINDOWS are not incompatible on FreeBSD.
---
diff --git a/BUILD.bazel b/BUILD.bazel
index 0000000..0000001 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -19,23 +19,24 @@ is_msvc
 CFLAGS_FOR_GCC = ["-Wall", "-Wwrite-strings", "-Wno-sign-compare", "-DTCMALLOC_DISABLE_HIDDEN_VISIBILITY"]
 CXXFLAGS_FOR_GCC = CFLAGS_FOR_GCC + ["-Woverloaded-virtual", "-std=gnu++17", "-fsized-deallocation"]

 CXXFLAGS = select({
-    ":is_msvc": ["/std:c++17 /D_WIN32_WINNT=0x0602"],
-    "//conditions:default": ["/std:c++17 /D_WIN32_WINNT=0x0602"], # the above doesn't work!
-    ":is_gcc": CXXFLAGS_FOR_GCC,
-    ":is_clang": CXXFLAGS_FOR_GCC + ["-Wthread-safety"]
+    ":is_msvc": ["/std:c++17", "/D_WIN32_WINNT=0x0602"],
+    ":is_gcc": CXXFLAGS_FOR_GCC,
+    ":is_clang": CXXFLAGS_FOR_GCC + ["-Wthread-safety"],
+    "//conditions:default": CXXFLAGS_FOR_GCC,
 })

 CFLAGS = select({
-    ":is_msvc": ["/D_WIN32_WINNT=0x0602"],
-    "//conditions:default": ["/D_WIN32_WINNT=0x0602"],
-    ":is_gcc": CFLAGS_FOR_GCC,
-    ":is_clang": CFLAGS_FOR_GCC + ["-Wthread-safety"]
+    ":is_msvc": ["/D_WIN32_WINNT=0x0602"],
+    ":is_gcc": CFLAGS_FOR_GCC,
+    ":is_clang": CFLAGS_FOR_GCC + ["-Wthread-safety"],
+    "//conditions:default": CFLAGS_FOR_GCC,
 })

 NON_WINDOWS = select({
     "@platforms//os:osx": [],
     "@platforms//os:linux": [],
+    "@platforms//os:freebsd": [],
     "//conditions:default": ["@platforms//:incompatible"],
 })