renamed GOOGLE_GLOG_DLL_DECL to GLOG_EXPORT

Use a consistent naming and avoid platform specific terms. Also remove
copy and paste code.

Author: sergiud

CMakeLists.txt

@@ -663,8 +663,8 @@ if (gflags_FOUND)
   endif (TARGET gflags::gflags)
 
   target_compile_definitions (glog PRIVATE
-    GFLAGS_DLL_DECLARE_FLAG=GOOGLE_GLOG_DLL_DECL
-    GFLAGS_DLL_DEFINE_FLAG=GOOGLE_GLOG_DLL_DECL
+    GFLAGS_DLL_DECLARE_FLAG=GLOG_EXPORT
+    GFLAGS_DLL_DEFINE_FLAG=GLOG_EXPORT
   )
 endif (gflags_FOUND)
 
@@ -711,7 +711,7 @@ target_compile_definitions (glogbase PUBLIC
   PRIVATE GOOGLE_GLOG_IS_A_DLL)
 
 generate_export_header (glog
-  EXPORT_MACRO_NAME GOOGLE_GLOG_DLL_DECL
+  EXPORT_MACRO_NAME GLOG_EXPORT
   EXPORT_FILE_NAME ${CMAKE_CURRENT_BINARY_DIR}/glog/export.h)
 
 # Unit testing

bazel/glog.bzl

@@ -78,10 +78,12 @@ def glog_library(namespace = "google", with_gflags = 1, **kwargs):
     ]
 
     linux_or_darwin_copts = wasm_copts + [
+        "-DGLOG_EXPORT=__attribute__((visibility(\\\"default\\\")))",
         # For src/utilities.cc.
         "-DHAVE_SYS_SYSCALL_H",
         # For src/logging.cc to create symlinks.
         "-DHAVE_UNISTD_H",
+        "-fvisibility=hidden",
     ]
 
     freebsd_only_copts = [
@@ -97,6 +99,7 @@ def glog_library(namespace = "google", with_gflags = 1, **kwargs):
     ]
 
     windows_only_copts = [
+        "-DGLOG_EXPORT=__declspec(dllexport)",
         "-DGLOG_NO_ABBREVIATED_SEVERITIES",
         "-DHAVE_SNPRINTF",
         "-I" + src_windows,
@@ -150,15 +153,16 @@ def glog_library(namespace = "google", with_gflags = 1, **kwargs):
         ],
         strip_include_prefix = "src",
         defines = select({
-            # GOOGLE_GLOG_DLL_DECL is normally set by export.h, but that's not
+            # GLOG_EXPORT is normally set by export.h, but that's not
             # generated for Bazel.
             "@bazel_tools//src/conditions:windows": [
-                "GOOGLE_GLOG_DLL_DECL=__declspec(dllexport)",
+                "GLOG_EXPORT=",
                 "GLOG_DEPRECATED=__declspec(deprecated)",
                 "GLOG_NO_ABBREVIATED_SEVERITIES",
             ],
             "//conditions:default": [
                 "GLOG_DEPRECATED=__attribute__((deprecated))",
+                "GLOG_EXPORT=__attribute__((visibility(\\\"default\\\")))",
             ],
         }),
         copts =

src/base/commandlineflags.h

@@ -61,16 +61,16 @@
 
 #include <glog/logging.h>
 
-#define DECLARE_VARIABLE(type, shorttype, name, tn)                     \
-  namespace fL##shorttype {                                             \
-    extern GOOGLE_GLOG_DLL_DECL type FLAGS_##name;                      \
-  }                                                                     \
+#define DECLARE_VARIABLE(type, shorttype, name, tn) \
+  namespace fL##shorttype {                         \
+    extern GLOG_EXPORT type FLAGS_##name;           \
+  }                                                 \
   using fL##shorttype::FLAGS_##name
-#define DEFINE_VARIABLE(type, shorttype, name, value, meaning, tn)      \
-  namespace fL##shorttype {                                             \
-    GOOGLE_GLOG_DLL_DECL type FLAGS_##name(value);                      \
-    char FLAGS_no##name;                                                \
-  }                                                                     \
+#define DEFINE_VARIABLE(type, shorttype, name, value, meaning, tn) \
+  namespace fL##shorttype {                                        \
+    GLOG_EXPORT type FLAGS_##name(value);                          \
+    char FLAGS_no##name;                                           \
+  }                                                                \
   using fL##shorttype::FLAGS_##name
 
 // bool specialization
@@ -95,17 +95,17 @@
 
 // Special case for string, because we have to specify the namespace
 // std::string, which doesn't play nicely with our FLAG__namespace hackery.
-#define DECLARE_string(name)                                            \
-  namespace fLS {                                                       \
-    extern GOOGLE_GLOG_DLL_DECL std::string& FLAGS_##name;              \
-  }                                                                     \
+#define DECLARE_string(name)                    \
+  namespace fLS {                               \
+  extern GLOG_EXPORT std::string& FLAGS_##name; \
+  }                                             \
   using fLS::FLAGS_##name
-#define DEFINE_string(name, value, meaning)                             \
-  namespace fLS {                                                       \
-    std::string FLAGS_##name##_buf(value);                              \
-    GOOGLE_GLOG_DLL_DECL std::string& FLAGS_##name = FLAGS_##name##_buf; \
-    char FLAGS_no##name;                                                \
-  }                                                                     \
+#define DEFINE_string(name, value, meaning)                   \
+  namespace fLS {                                             \
+  std::string FLAGS_##name##_buf(value);                      \
+  GLOG_EXPORT std::string& FLAGS_##name = FLAGS_##name##_buf; \
+  char FLAGS_no##name;                                        \
+  }                                                           \
   using fLS::FLAGS_##name
 
 #endif  // HAVE_LIB_GFLAGS

src/demangle.h

@@ -78,7 +78,7 @@ _START_GOOGLE_NAMESPACE_
 // Demangle "mangled".  On success, return true and write the
 // demangled symbol name to "out".  Otherwise, return false.
 // "out" is modified even if demangling is unsuccessful.
-bool GOOGLE_GLOG_DLL_DECL Demangle(const char *mangled, char *out, size_t out_size);
+bool GLOG_EXPORT Demangle(const char *mangled, char *out, size_t out_size);
 
 _END_GOOGLE_NAMESPACE_
 

src/glog/log_severity.h

@@ -43,16 +43,7 @@
 //   whenever an ERROR occurs in production.
 // FATAL:
 //   Use for undesired and unexpected events that the program cannot recover
-//   from. 
-
-// Annoying stuff for windows -- makes sure clients can import these functions
-#ifndef GOOGLE_GLOG_DLL_DECL
-# if defined(_WIN32) && !defined(__CYGWIN__)
-#   define GOOGLE_GLOG_DLL_DECL  __declspec(dllimport)
-# else
-#   define GOOGLE_GLOG_DLL_DECL
-# endif
-#endif
+//   from.
 
 // Variables of type LogSeverity are widely taken to lie in the range
 // [0, NUM_SEVERITIES-1].  Be careful to preserve this assumption if
@@ -76,7 +67,7 @@ const int INFO = GLOG_INFO, WARNING = GLOG_WARNING,
 #define DFATAL_LEVEL FATAL
 #endif
 
-extern GOOGLE_GLOG_DLL_DECL const char* const LogSeverityNames[NUM_SEVERITIES];
+extern GLOG_EXPORT const char* const LogSeverityNames[NUM_SEVERITIES];
 
 // NDEBUG usage helpers related to (RAW_)DCHECK:
 //