rework public header structure

Promote generated headers to regular headers. This enables direct editing of corresponding files and running automatic source code formatting and static analysis tools, such as clang-format and clang-tidy on the whole project which previously was not straightforward.
google · Dec 30, 2023 · 3b278fe · 3b278fe
1 parent 80d7fa3
commit 3b278fe
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Showing 38 changed files with 782 additions and 924 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -133,10 +133,7 @@ endif (Unwind_FOUND)
 
 check_include_file_cxx (dlfcn.h HAVE_DLFCN_H)
 check_include_file_cxx (glob.h HAVE_GLOB_H)
-check_include_file_cxx (memory.h HAVE_MEMORY_H)
 check_include_file_cxx (pwd.h HAVE_PWD_H)
-check_include_file_cxx (strings.h HAVE_STRINGS_H)
-check_include_file_cxx (sys/stat.h HAVE_SYS_STAT_H)
 check_include_file_cxx (sys/syscall.h HAVE_SYS_SYSCALL_H)
 check_include_file_cxx (sys/time.h HAVE_SYS_TIME_H)
 check_include_file_cxx (sys/types.h HAVE_SYS_TYPES_H)
@@ -190,28 +187,6 @@ set (CMAKE_REQUIRED_LIBRARIES dbghelp)
 check_cxx_symbol_exists (UnDecorateSymbolName "windows.h;dbghelp.h" HAVE_DBGHELP)
 cmake_pop_check_state ()
 
-check_cxx_source_compiles ("
-#include <cstdlib>
-static void foo(void) __attribute__ ((unused));
-int main(void) { return 0; }
-" HAVE___ATTRIBUTE__)
-
-check_cxx_source_compiles ("
-#include <cstdlib>
-static void foo(void) __attribute__ ((visibility(\"default\")));
-int main(void) { return 0; }
-" HAVE___ATTRIBUTE__VISIBILITY_DEFAULT)
-
-check_cxx_source_compiles ("
-#include <cstdlib>
-static void foo(void) __attribute__ ((visibility(\"hidden\")));
-int main(void) { return 0; }
-" HAVE___ATTRIBUTE__VISIBILITY_HIDDEN)
-
-check_cxx_source_compiles ("
-int main(void) { if (__builtin_expect(0, 0)) return 1; return 0; }
-" HAVE___BUILTIN_EXPECT)
-
 check_cxx_source_compiles ("
 int main(void)
 {
@@ -285,58 +260,6 @@ if (HAVE_UCONTEXT_H AND NOT DEFINED PC_FROM_UCONTEXT)
   cmake_pop_check_state ()
 endif (HAVE_UCONTEXT_H AND NOT DEFINED PC_FROM_UCONTEXT)
 
-set (GOOGLE_NAMESPACE google)
-set (_START_GOOGLE_NAMESPACE_ "namespace ${GOOGLE_NAMESPACE} {")
-set (_END_GOOGLE_NAMESPACE_ "}")
-set (ac_cv_have_glog_export 1)
-
-if (HAVE_LIB_GFLAGS)
-  set (ac_cv_have_libgflags 1)
-else (HAVE_LIB_GFLAGS)
-  set (ac_cv_have_libgflags 0)
-endif (HAVE_LIB_GFLAGS)
-
-if (HAVE_SYS_TYPES_H)
-  set (ac_cv_have_systypes_h 1)
-else (HAVE_SYS_TYPES_H)
-  set (ac_cv_have_systypes_h 0)
-endif (HAVE_SYS_TYPES_H)
-
-if (HAVE_SSIZE_T)
-  set (ac_cv_have_ssize_t 1)
-else (HAVE_SSIZE_T)
-  set (ac_cv_have_ssize_t 0)
-endif (HAVE_SSIZE_T)
-
-if (HAVE_MODE_T)
-  set (ac_cv_have_mode_t 1)
-else (HAVE_MODE_T)
-  set (ac_cv_have_mode_t 0)
-endif (HAVE_MODE_T)
-
-if (HAVE_UNISTD_H)
-  set (ac_cv_have_unistd_h 1)
-else (HAVE_UNISTD_H)
-  set (ac_cv_have_unistd_h 0)
-endif (HAVE_UNISTD_H)
-
-set (ac_google_namespace ${GOOGLE_NAMESPACE})
-set (ac_google_end_namespace ${_END_GOOGLE_NAMESPACE_})
-set (ac_google_start_namespace ${_START_GOOGLE_NAMESPACE_})
-
-if (HAVE___ATTRIBUTE__)
-  set (ac_cv___attribute___noinline "__attribute__((noinline))")
-  set (ac_cv___attribute___printf_4_5 "__attribute__((__format__(__printf__, 4, 5)))")
-elseif (HAVE___DECLSPEC)
-  #set (ac_cv___attribute___noinline "__declspec(noinline)")
-endif (HAVE___ATTRIBUTE__)
-
-if (HAVE___BUILTIN_EXPECT)
-  set (ac_cv_have___builtin_expect 1)
-else (HAVE___BUILTIN_EXPECT)
-  set (ac_cv_have___builtin_expect 0)
-endif (HAVE___BUILTIN_EXPECT)
-
 if (HAVE_EXECINFO_BACKTRACE AND HAVE_EXECINFO_BACKTRACE_SYMBOLS)
   set (HAVE_STACKTRACE 1)
 endif (HAVE_EXECINFO_BACKTRACE AND HAVE_EXECINFO_BACKTRACE_SYMBOLS)
@@ -414,10 +337,6 @@ else (CYGWIN)
 endif (CYGWIN)
 
 configure_file (src/config.h.cmake.in config.h)
-configure_file (src/glog/logging.h.in glog/logging.h @ONLY)
-configure_file (src/glog/raw_logging.h.in glog/raw_logging.h @ONLY)
-configure_file (src/glog/stl_logging.h.in glog/stl_logging.h @ONLY)
-configure_file (src/glog/vlog_is_on.h.in glog/vlog_is_on.h @ONLY)
 
 set (_glog_CMake_BINDIR ${CMAKE_INSTALL_BINDIR})
 set (_glog_CMake_INCLUDE_DIR ${CMAKE_INSTALL_INCLUDEDIR})
@@ -459,12 +378,12 @@ endif (_glog_CMake_MODULES)
 
 set (GLOG_PUBLIC_H
   ${glog_BINARY_DIR}/glog/export.h
-  ${glog_BINARY_DIR}/glog/logging.h
-  ${glog_BINARY_DIR}/glog/raw_logging.h
-  ${glog_BINARY_DIR}/glog/stl_logging.h
-  ${glog_BINARY_DIR}/glog/vlog_is_on.h
   src/glog/log_severity.h
+  src/glog/logging.h
   src/glog/platform.h
+  src/glog/raw_logging.h
+  src/glog/stl_logging.h
+  src/glog/vlog_is_on.h
 )
 
 set (GLOG_SRCS
@@ -517,6 +436,13 @@ add_library (glog::glog ALIAS glog)
 
 set (glog_libraries_options_for_static_linking)
 
+# CMake always uses the generated export header
+target_compile_definitions (glog PUBLIC GLOG_USE_GLOG_EXPORT)
+
+if (HAVE_LIB_GFLAGS)
+  target_compile_definitions (glog PUBLIC GLOG_USE_GFLAGS)
+endif (HAVE_LIB_GFLAGS)
+
 if (Unwind_FOUND)
   target_link_libraries (glog PRIVATE unwind::unwind)
   set (glog_libraries_options_for_static_linking "${glog_libraries_options_for_static_linking} -lunwind")

diff --git a/bazel/glog.bzl b/bazel/glog.bzl
@@ -25,13 +25,7 @@ expand_template = rule(
     },
 )
 
-def dict_union(x, y):
-    z = {}
-    z.update(x)
-    z.update(y)
-    return z
-
-def glog_library(namespace = "google", with_gflags = 1, **kwargs):
+def glog_library(with_gflags = 1, **kwargs):
     if native.repository_name() != "@":
         repo_name = native.repository_name()[1:]  # Strip the first leading @
         gendir = "$(GENDIR)/external/" + repo_name
@@ -55,11 +49,9 @@ def glog_library(namespace = "google", with_gflags = 1, **kwargs):
     common_copts = [
         "-std=c++14",
         "-DGLOG_BAZEL_BUILD",
-        # Inject a C++ namespace.
-        "-DGOOGLE_NAMESPACE='%s'" % namespace,
         "-DHAVE_STRING_H",
         "-I%s/glog_internal" % gendir,
-    ] + (["-DHAVE_LIB_GFLAGS"] if with_gflags else [])
+    ] + (["-DGLOG_USE_GFLAGS"] if with_gflags else [])
 
     wasm_copts = [
         # Disable warnings that exists in glog.
@@ -83,6 +75,9 @@ def glog_library(namespace = "google", with_gflags = 1, **kwargs):
 
     linux_or_darwin_copts = wasm_copts + [
         "-DGLOG_EXPORT=__attribute__((visibility(\\\"default\\\")))",
+        "-DHAVE_MODE_T",
+        "-DHAVE_SSIZE_T",
+        "-DHAVE_SYS_TYPES_H",
         # For src/utilities.cc.
         "-DHAVE_SYS_SYSCALL_H",
         # For src/logging.cc to create symlinks.
@@ -194,11 +189,11 @@ def glog_library(namespace = "google", with_gflags = 1, **kwargs):
         }),
         hdrs = [
             "src/glog/log_severity.h",
+            "src/glog/logging.h",
             "src/glog/platform.h",
-            ":logging_h",
-            ":raw_logging_h",
-            ":stl_logging_h",
-            ":vlog_is_on_h",
+            "src/glog/raw_logging.h",
+            "src/glog/stl_logging.h",
+            "src/glog/vlog_is_on.h",
         ],
         # https://github.com/google/glog/issues/837: Replacing
         # `strip_include_prefix` with `includes` would avoid spamming
@@ -261,10 +256,10 @@ def glog_library(namespace = "google", with_gflags = 1, **kwargs):
         name = "strip_include_prefix_hack",
         hdrs = [
             "src/glog/log_severity.h",
-            ":logging_h",
-            ":raw_logging_h",
-            ":stl_logging_h",
-            ":vlog_is_on_h",
+            "src/glog/logging.h",
+            "src/glog/raw_logging.h",
+            "src/glog/stl_logging.h",
+            "src/glog/vlog_is_on.h",
         ],
     )
 
@@ -274,51 +269,3 @@ def glog_library(namespace = "google", with_gflags = 1, **kwargs):
         out = "glog_internal/config.h",
         substitutions = {"#cmakedefine": "//cmakedefine"},
     )
-
-    common_config = {
-        "@ac_cv_have_u_int16_t@": "0",
-        "@ac_cv_have_glog_export@": "0",
-        "@ac_google_start_namespace@": "namespace google {",
-        "@ac_google_end_namespace@": "}",
-        "@ac_google_namespace@": "google",
-    }
-
-    posix_config = dict_union(common_config, {
-        "@ac_cv___attribute___noinline@": "__attribute__((noinline))",
-        "@ac_cv___attribute___printf_4_5@": "__attribute__((__format__(__printf__, 4, 5)))",
-        "@ac_cv_have___builtin_expect@": "1",
-        "@ac_cv_have_libgflags@": "1" if with_gflags else "0",
-        "@ac_cv_have_mode_t@": "1",
-        "@ac_cv_have_ssize_t@": "1",
-        "@ac_cv_have_systypes_h@": "1",
-        "@ac_cv_have_unistd_h@": "1",
-    })
-
-    windows_config = dict_union(common_config, {
-        "@ac_cv___attribute___noinline@": "",
-        "@ac_cv___attribute___printf_4_5@": "",
-        "@ac_cv_have___builtin_expect@": "0",
-        "@ac_cv_have_libgflags@": "0",
-        "@ac_cv_have_mode_t@": "0",
-        "@ac_cv_have_ssize_t@": "0",
-        "@ac_cv_have_systypes_h@": "0",
-        "@ac_cv_have_unistd_h@": "0",
-    })
-
-    [
-        expand_template(
-            name = "%s_h" % f,
-            template = "src/glog/%s.h.in" % f,
-            out = "src/glog/%s.h" % f,
-            substitutions = select({
-                "@bazel_tools//src/conditions:windows": windows_config,
-                "//conditions:default": posix_config,
-            }),
-        )
-        for f in [
-            "vlog_is_on",
-            "stl_logging",
-            "raw_logging",
-            "logging",
-        ]
-    ]
diff --git a/src/base/commandlineflags.h b/src/base/commandlineflags.h
@@ -53,7 +53,7 @@
 #include <cstring>               // for memchr
 #include <string>
 
-#ifdef HAVE_LIB_GFLAGS
+#ifdef GLOG_USE_GFLAGS
 
 #include <gflags/gflags.h>
 
@@ -80,18 +80,16 @@
   DEFINE_VARIABLE(bool, B, name, value, meaning, bool)
 
 // int32 specialization
-#define DECLARE_int32(name) \
-  DECLARE_VARIABLE(GOOGLE_NAMESPACE::int32, I, name, int32)
+#define DECLARE_int32(name) DECLARE_VARIABLE(google::int32, I, name, int32)
 #define DEFINE_int32(name, value, meaning) \
-  DEFINE_VARIABLE(GOOGLE_NAMESPACE::int32, I, name, value, meaning, int32)
+  DEFINE_VARIABLE(google::int32, I, name, value, meaning, int32)
 
 // uint32 specialization
 #ifndef DECLARE_uint32
-#define DECLARE_uint32(name) \
-  DECLARE_VARIABLE(GOOGLE_NAMESPACE::uint32, U, name, uint32)
+#define DECLARE_uint32(name) DECLARE_VARIABLE(google::uint32, U, name, uint32)
 #endif // DECLARE_uint64
 #define DEFINE_uint32(name, value, meaning) \
-  DEFINE_VARIABLE(GOOGLE_NAMESPACE::uint32, U, name, value, meaning, uint32)
+  DEFINE_VARIABLE(google::uint32, U, name, value, meaning, uint32)
 
 // Special case for string, because we have to specify the namespace
 // std::string, which doesn't play nicely with our FLAG__namespace hackery.
@@ -108,7 +106,7 @@
   }                                                           \
   using fLS::FLAGS_##name
 
-#endif  // HAVE_LIB_GFLAGS
+#endif  // GLOG_USE_GFLAGS
 
 // Define GLOG_DEFINE_* using DEFINE_* . By using these macros, we
 // have GLOG_* environ variables even if we have gflags installed.

diff --git a/src/cleanup_immediately_unittest.cc b/src/cleanup_immediately_unittest.cc
@@ -32,7 +32,7 @@
 #include "glog/raw_logging.h"
 #include "googletest.h"
 
-#ifdef HAVE_LIB_GFLAGS
+#ifdef GLOG_USE_GFLAGS
 #include <gflags/gflags.h>
 using namespace GFLAGS_NAMESPACE;
 #endif
@@ -42,7 +42,7 @@ using namespace GFLAGS_NAMESPACE;
 
 #include "mock-log.h"
 // Introduce several symbols from gmock.
-using GOOGLE_NAMESPACE::glog_testing::ScopedMockLog;
+using google::glog_testing::ScopedMockLog;
 using testing::_;
 using testing::AllOf;
 using testing::AnyNumber;
@@ -52,7 +52,7 @@ using testing::StrictMock;
 using testing::StrNe;
 #endif
 
-using namespace GOOGLE_NAMESPACE;
+using namespace google;
 
 TEST(CleanImmediately, logging) {
   google::SetLogFilenameExtension(".foobar");
@@ -68,7 +68,7 @@ TEST(CleanImmediately, logging) {
 int main(int argc, char **argv) {
   FLAGS_colorlogtostderr = false;
   FLAGS_timestamp_in_logfile_name = true;
-#ifdef HAVE_LIB_GFLAGS
+#ifdef GLOG_USE_GFLAGS
   ParseCommandLineFlags(&argc, &argv, true);
 #endif
   // Make sure stderr is not buffered as stderr seems to be buffered

diff --git a/src/cleanup_with_absolute_prefix_unittest.cc b/src/cleanup_with_absolute_prefix_unittest.cc
@@ -32,7 +32,7 @@
 #include "glog/raw_logging.h"
 #include "googletest.h"
 
-#ifdef HAVE_LIB_GFLAGS
+#ifdef GLOG_USE_GFLAGS
 #include <gflags/gflags.h>
 using namespace GFLAGS_NAMESPACE;
 #endif
@@ -42,7 +42,7 @@ using namespace GFLAGS_NAMESPACE;
 
 #include "mock-log.h"
 // Introduce several symbols from gmock.
-using GOOGLE_NAMESPACE::glog_testing::ScopedMockLog;
+using google::glog_testing::ScopedMockLog;
 using testing::_;
 using testing::AllOf;
 using testing::AnyNumber;
@@ -52,7 +52,7 @@ using testing::StrictMock;
 using testing::StrNe;
 #endif
 
-using namespace GOOGLE_NAMESPACE;
+using namespace google;
 
 TEST(CleanImmediatelyWithAbsolutePrefix, logging) {
   google::EnableLogCleaner(0);
@@ -73,7 +73,7 @@ TEST(CleanImmediatelyWithAbsolutePrefix, logging) {
 int main(int argc, char **argv) {
   FLAGS_colorlogtostderr = false;
   FLAGS_timestamp_in_logfile_name = true;
-#ifdef HAVE_LIB_GFLAGS
+#ifdef GLOG_USE_GFLAGS
   ParseCommandLineFlags(&argc, &argv, true);
 #endif
   // Make sure stderr is not buffered as stderr seems to be buffered