contrib: ebur128: add patch to do static-only builds

This is an adapted version (to apply on 1.2.4) of the PR I sent
upstream to honor the BUILD_SHARED_LIBS option (which is the officially
intended way to handle static vs shared libraries).

contrib/src/libebur128/0001-CMake-Respect-the-BUILD_SHARED_LIBS-option-instead-o.patch

+From 92f0606875e60885f7c9f7543b6c72731c87e525 Mon Sep 17 00:00:00 2001
+From: Marvin Scholz <epirat07@gmail.com>
+Date: Wed, 30 Sep 2020 12:31:17 +0200
+Subject: [PATCH] CMake: Respect the BUILD_SHARED_LIBS option instead of
+ BUILD_STATIC_LIBS
+
+Instead of the custom BUILD_STATIC_LIBS option, properly respect the
+BUILD_SHARED_LIBS option as documented by CMake at
+https://cmake.org/cmake/help/latest/variable/BUILD_SHARED_LIBS.html
+---
+ CMakeLists.txt         |  9 +++++---
+ ebur128/CMakeLists.txt | 52 +++++++++++++++++++++++-------------------
+ 2 files changed, 35 insertions(+), 26 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index f741317..3901457 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,6 +1,9 @@
+ cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)
+ project(libebur128 C)
+ 
++option(BUILD_SHARED_LIBS
++    "Build shared libraries instead of static ones" ON)
++
+ list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+ set(EXECUTABLE_OUTPUT_PATH ${CMAKE_CURRENT_BINARY_DIR})
+ set(LIBRARY_OUTPUT_PATH ${CMAKE_CURRENT_BINARY_DIR})
+@@ -23,10 +26,10 @@ endif()
+ message(STATUS "Status          found / disabled --")
+ message(STATUS "queue.h:        ${SUMMARY_HAS_QUEUE}"        "     ${USE_QUEUE}")
+ 
+-if(BUILD_STATIC_LIBS)
+-  message(STATUS "build static library and shared library!")
++if(BUILD_SHARED_LIBS)
++  message(STATUS "Building shared library (set BUILD_SHARED_LIBS to NO to build static)")
+ else()
+-  message(STATUS "not building static library, set BUILD_STATIC_LIBS to ON to enable")
++  message(STATUS "Building static library")
+ endif()
+ 
+ if(NOT ${SUMMARY_HAS_QUEUE} AND NOT ${ENABLE_INTERNAL_QUEUE_H})
+diff --git a/ebur128/CMakeLists.txt b/ebur128/CMakeLists.txt
+index d77385e..0e7845c 100644
+--- a/ebur128/CMakeLists.txt
++++ b/ebur128/CMakeLists.txt
+@@ -25,30 +25,37 @@ endif()
+ set(EBUR128_VERSION_MAJOR 1)
+ set(EBUR128_VERSION 1.2.4)
+ 
+-#### static
+-if(BUILD_STATIC_LIBS)
+-  add_library(ebur128_static STATIC ebur128.c)
+-  if(NOT MSVC)
+-    set_property(TARGET ebur128_static PROPERTY OUTPUT_NAME ebur128)
+-  endif()
+-endif()
++add_library(ebur128 ebur128.c)
+ 
+-if(WITH_STATIC_PIC)
+-  set_property(TARGET ebur128_static PROPERTY POSITION_INDEPENDENT_CODE ON)
+-endif()
++if(NOT BUILD_SHARED_LIBS)
++  # Static build specific things
++  if(WITH_STATIC_PIC)
++    set_property(TARGET ebur128 PROPERTY POSITION_INDEPENDENT_CODE ON)
+ 
+-#### shared
+-# set source file for library, which includes def file if using MSVC
+-set(EBUR128_SHARED_SOURCE ebur128.c)
+-if(MSVC)
+-  set(EBUR128_SHARED_SOURCE ${EBUR128_SHARED_SOURCE} ebur128.def)
+-endif()
++    set_target_properties(ebur128 PROPERTIES
++      SOVERSION ${EBUR128_VERSION_MAJOR}
++      VERSION ${EBUR128_VERSION})
++  endif()
+ 
+-add_library(ebur128 SHARED ${EBUR128_SHARED_SOURCE})
+-set_target_properties(ebur128 PROPERTIES
++else()
++  # Share build specific things
++  set_target_properties(ebur128 PROPERTIES
+     SOVERSION ${EBUR128_VERSION_MAJOR}
+     VERSION ${EBUR128_VERSION})
+ 
++  if(WIN32)
++    set_target_properties(ebur128 PROPERTIES
++      OUTPUT_NAME ebur128
++      RUNTIME_OUTPUT_NAME ebur128-${EBUR128_VERSION_MAJOR}
++      ARCHIVE_OUTPUT_NAME ebur128)
++  endif(WIN32)
++
++  if(MSVC)
++    target_sources(ebur128 PRIVATE ebur128.def)
++  endif()
++endif()
++
++# Link with Math library if available
+ find_library(MATH_LIBRARY m)
+ if(MATH_LIBRARY)
+   target_link_libraries(ebur128 ${MATH_LIBRARY})
+@@ -57,11 +64,10 @@ endif()
+ set(EBUR128_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR} CACHE INTERNAL "")
+ 
+ install(FILES ebur128.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+-if(BUILD_STATIC_LIBS)
+-  install(TARGETS ebur128 ebur128_static DESTINATION ${CMAKE_INSTALL_LIBDIR})
+-else()
+-  install(TARGETS ebur128 DESTINATION ${CMAKE_INSTALL_LIBDIR})
+-endif()
++install(TARGETS ebur128
++  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
++  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
++  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+ 
+ #### pkg-config
+ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libebur128.pc.cmake
+-- 
+2.24.3 (Apple Git-128)
+

contrib/src/libebur128/rules.mak

@@ -16,6 +16,7 @@ $(TARBALLS)/libebur128-$(LIBEBUR128_VERSION).tar.gz:
 libebur128: libebur128-$(LIBEBUR128_VERSION).tar.gz .sum-libebur128
 	$(UNPACK)
 	$(call pkg_static,"./ebur128/libebur128.pc.cmake")
+	$(APPLY) $(SRC)/libebur128/0001-CMake-Respect-the-BUILD_SHARED_LIBS-option-instead-o.patch
 	$(MOVE)
 
 .libebur128: libebur128 toolchain.cmake