From 66c7d1b1ac134758382e1942cfe523d69a22513c Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Wed, 18 Nov 2015 14:29:31 -0700
Subject: [PATCH] add symbol versioning

closes #40
---
 CMakeLists.txt             | 8 +++++++-
 src/link_version_script.in | 3 +++
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 src/link_version_script.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index be7239e..d451383 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -212,14 +212,20 @@ configure_file(
     "${CMAKE_SOURCE_DIR}/doc/doxygen.conf.in"
     ${DOXYGEN_CONF_FILE}
 )
+set(LINK_VERSION_SCRIPT "${CMAKE_BINARY_DIR}/link_version_script")
+configure_file(
+    "${CMAKE_SOURCE_DIR}/src/link_version_script.in"
+    ${LINK_VERSION_SCRIPT}
+)
 
-add_library(libsoundio_shared SHARED ${LIBSOUNDIO_SOURCES})
+add_library(libsoundio_shared SHARED ${LIBSOUNDIO_SOURCES} ${LINK_VERSION_SCRIPT})
 set_target_properties(libsoundio_shared PROPERTIES
     OUTPUT_NAME soundio
     SOVERSION ${LIBSOUNDIO_VERSION_MAJOR}
     VERSION ${LIBSOUNDIO_VERSION}
     COMPILE_FLAGS ${LIB_CFLAGS}
     LINKER_LANGUAGE C
+    LINK_FLAGS "-Wl,--version-script='${LINK_VERSION_SCRIPT}'"
 )
 target_link_libraries(libsoundio_shared LINK_PUBLIC ${LIBSOUNDIO_LIBS})
 install(TARGETS libsoundio_shared DESTINATION ${CMAKE_INSTALL_LIBDIR})
diff --git a/src/link_version_script.in b/src/link_version_script.in
new file mode 100644
index 0000000..9060297
--- /dev/null
+++ b/src/link_version_script.in
@@ -0,0 +1,3 @@
+LIBSOUNDIO_@LIBSOUNDIO_VERSION_MAJOR@ {
+  global: *;
+};