From 9e82faa335bc8fde700541da39bb5279b1696b89 Mon Sep 17 00:00:00 2001
From: Ryan Pavlik <ryan.pavlik@collabora.com>
Date: Wed, 23 Mar 2022 11:32:50 -0500
Subject: [PATCH] Limit symbol exports in CMake build.

---
 src/CMakeLists.txt   | 13 ++++++++++++-
 src/percetto.exports | 14 ++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 src/percetto.exports

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ba95b1e..fa3ad5e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -17,7 +17,18 @@ set_target_properties(
 target_include_directories(percetto PUBLIC $<BUILD_INTERFACE:${PERFETTO_SDK_PATH}>)
 target_include_directories(percetto PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
                                            $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
-
+if("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
+    # Limit what symbols are exported
+    set_property(
+        TARGET percetto
+        APPEND_STRING
+        PROPERTY LINK_FLAGS "-Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/percetto.exports")
+    # Re-link if the version script changes.
+    set_property(
+        TARGET percetto
+        APPEND
+        PROPERTY LINK_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/percetto.exports")
+endif()
 install(FILES percetto.h perfetto-port.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 install(
     TARGETS percetto
diff --git a/src/percetto.exports b/src/percetto.exports
new file mode 100644
index 0000000..20c7937
--- /dev/null
+++ b/src/percetto.exports
@@ -0,0 +1,14 @@
+{
+  global:
+    percetto_register_group_category;
+    percetto_register_track;
+    percetto_event_begin;
+    percetto_event_end;
+    percetto_event;
+    percetto_event_extended;
+    percetto_init_with_args;
+    percetto_init;
+
+  local:
+    *;
+};